diff --git a/cmake/modules/FindMySQL.cmake b/cmake/modules/FindMySQL.cmake
new file mode 100644
index 0000000..0168725
--- /dev/null
+++ b/cmake/modules/FindMySQL.cmake
@@ -0,0 +1,78 @@
+# - Try to find MySQL.
+# Once done this will define:
+# MYSQL_FOUND			- If false, do not try to use MySQL.
+# MYSQL_INCLUDE_DIRS	- Where to find mysql.h, etc.
+# MYSQL_LIBRARIES		- The libraries to link against.
+# MYSQL_VERSION_STRING	- Version in a string of MySQL.
+#
+# Created by RenatoUtsch based on eAthena implementation.
+#
+#
+
+find_path(MYSQL_INCLUDE_DIR
+        NAMES mysql.h
+        PATHS /usr/local/opt/mysql-client/include/mysql /usr/include/mysql /usr/local/include/mysql /usr/local/mysql/include/
+            $ENV{PROGRAMFILES}/MySQL/*/include $ENV{SYSTEMDRIVE}/MySQL/*/include C:/mysql/include)
+
+set(CMAKE_FIND_LIBRARY_SUFFIXES ".a" ".lib")
+
+find_library(MYSQL_LIBRARY
+        NAMES mysqlclient mysqlclient_r
+        PATHS /usr/local/opt/mysql-client/lib /lib/mysql /lib64/mysql /usr/lib/mysql /usr/lib64/mysql /usr/local/lib/mysql /usr/local/lib64/mysql /usr/local/mysql/lib/
+            $ENV{PROGRAMFILES}/MySQL/*/lib $ENV{SYSTEMDRIVE}/MySQL/*/lib C:/mysql/lib/vs14)
+
+find_path(SSL_INCLUDE_DIR
+        NAMES openssl/ssl.h
+        PATHS
+        /usr/local/Cellar/openssl@1.1/1.1.1d /usr/include /usr/local/include /opt/local/include /sw/include
+        PATH_SUFFIXES
+        include)
+
+find_library(_SSL_LIB
+        NAMES ssl
+        PATHS
+        /usr/local/Cellar/openssl@1.1/1.1.1d /usr/lib /usr/local/lib /opt/local/lib /sw/lib
+        PATH_SUFFIXES
+        lib)
+
+find_library(_CRYPTO_LIB
+        NAMES crypto
+        PATHS
+        /usr/local/Cellar/openssl@1.1/1.1.1d /usr/lib /usr/local/lib /opt/local/lib /sw/lib
+        PATH_SUFFIXES
+        lib)
+
+
+if (MYSQL_INCLUDE_DIR AND EXISTS "${MYSQL_INCLUDE_DIR}/mysql_version.h")
+    file(STRINGS "${MYSQL_INCLUDE_DIR}/mysql_version.h"
+            MYSQL_VERSION_H REGEX "^#define[ \t]+MYSQL_SERVER_VERSION[ \t]+\"[^\"]+\".*$")
+    string(REGEX REPLACE
+            "^.*MYSQL_SERVER_VERSION[ \t]+\"([^\"]+)\".*$" "\\1" MYSQL_VERSION_STRING
+            "${MYSQL_VERSION_H}")
+endif ()
+
+# handle the QUIETLY and REQUIRED arguments and set MYSQL_FOUND to TRUE if
+# all listed variables are TRUE
+include(FindPackageHandleStandardArgs)
+find_package_handle_standard_args(MYSQL DEFAULT_MSG MYSQL_LIBRARY MYSQL_INCLUDE_DIR MYSQL_VERSION_STRING)
+
+if(MYSQL_FOUND)
+    set(MYSQL_INCLUDE_DIRS ${MYSQL_INCLUDE_DIR})
+    set(MYSQL_LIBRARIES ${MYSQL_LIBRARY})
+endif()
+
+mark_as_advanced(MYSQL_INCLUDE_DIR MYSQL_LIBRARY)
+
+find_package_handle_standard_args(ssl DEFAULT_MSG _SSL_LIB _CRYPTO_LIB SSL_INCLUDE_DIR)
+mark_as_advanced(SSL_INCLUDE_DIR _SSL_LIB _CRYPTO_LIB)
+
+if(SSL_FOUND)
+    set(MYSQL_INCLUDE_DIRS ${MYSQL_INCLUDE_DIR} ${SSL_INCLUDE_DIR})
+    set(MYSQL_LIBRARIES ${MYSQL_LIBRARY} ${_SSL_LIB} ${_CRYPTO_LIB})
+endif()
+
+message("------------MySQL------------")
+message("MYSQL_VERSION_STRING=${MYSQL_VERSION_STRING}")
+message("MYSQL_INCLUDE_DIRS=${MYSQL_INCLUDE_DIRS}")
+message("MYSQL_LIBRARIES=${MYSQL_LIBRARIES}")
+message("------------MySQL------------")
\ No newline at end of file
diff --git a/examples/CMakeLists.txt b/examples/CMakeLists.txt
new file mode 100644
index 0000000..5ccf7c1
--- /dev/null
+++ b/examples/CMakeLists.txt
@@ -0,0 +1,11 @@
+
+add_subdirectory(CoroutineDemo)
+add_subdirectory(HttpDemo)
+add_subdirectory(PushDemo)
+add_subdirectory(QuickStartDemo)
+add_subdirectory(StressDemo)
+
+add_custom_target(run-quick-start
+        DEPENDS QuickStartDemo QuickStartDemoClient
+        COMMAND sh ${CMAKE_CURRENT_SOURCE_DIR}/scripts/run-quick-start.sh
+        COMMENT "call")
diff --git a/examples/CoroutineDemo/AServer/AServant.h b/examples/CoroutineDemo/AServer/AServant.h
new file mode 100644
index 0000000..afa315d
--- /dev/null
+++ b/examples/CoroutineDemo/AServer/AServant.h
@@ -0,0 +1,648 @@
+// **********************************************************************
+// This file was generated by a TARS parser!
+// TARS version 1.4.0.
+// **********************************************************************
+
+#ifndef __ASERVANT_H_
+#define __ASERVANT_H_
+
+#include <map>
+#include <string>
+#include <vector>
+#include "tup/Tars.h"
+#include "tup/TarsJson.h"
+using namespace std;
+#include "servant/ServantProxy.h"
+#include "servant/Servant.h"
+
+
+namespace Test
+{
+
+    /* callback of async proxy for client */
+    class AServantPrxCallback: public tars::ServantProxyCallback
+    {
+    public:
+        virtual ~AServantPrxCallback(){}
+        virtual void callback_test(tars::Int32 ret)
+        { throw std::runtime_error("callback_test() override incorrect."); }
+        virtual void callback_test_exception(tars::Int32 ret)
+        { throw std::runtime_error("callback_test_exception() override incorrect."); }
+
+        virtual void callback_testInt(tars::Int32 ret, tars::Int32 iOut)
+        { throw std::runtime_error("callback_testInt() override incorrect."); }
+        virtual void callback_testInt_exception(tars::Int32 ret)
+        { throw std::runtime_error("callback_testInt_exception() override incorrect."); }
+
+        virtual void callback_testStr(tars::Int32 ret,  const std::string& sOut)
+        { throw std::runtime_error("callback_testStr() override incorrect."); }
+        virtual void callback_testStr_exception(tars::Int32 ret)
+        { throw std::runtime_error("callback_testStr_exception() override incorrect."); }
+
+    public:
+        virtual const map<std::string, std::string> & getResponseContext() const
+        {
+            CallbackThreadData * pCbtd = CallbackThreadData::getData();
+            assert(pCbtd != NULL);
+
+            if(!pCbtd->getContextValid())
+            {
+                throw TC_Exception("cann't get response context");
+            }
+            return pCbtd->getResponseContext();
+        }
+
+    public:
+        virtual int onDispatch(tars::ReqMessagePtr msg)
+        {
+            static ::std::string __AServant_all[]=
+            {
+                "test",
+                "testInt",
+                "testStr"
+            };
+            pair<string*, string*> r = equal_range(__AServant_all, __AServant_all+3, string(msg->request.sFuncName));
+            if(r.first == r.second) return tars::TARSSERVERNOFUNCERR;
+            switch(r.first - __AServant_all)
+            {
+                case 0:
+                {
+                    if (msg->response->iRet != tars::TARSSERVERSUCCESS)
+                    {
+                        callback_test_exception(msg->response->iRet);
+
+                        return msg->response->iRet;
+                    }
+                    tars::TarsInputStream<tars::BufferReader> _is;
+
+                    _is.setBuffer(msg->response->sBuffer);
+                    tars::Int32 _ret;
+                    _is.read(_ret, 0, true);
+
+                    CallbackThreadData * pCbtd = CallbackThreadData::getData();
+                    assert(pCbtd != NULL);
+
+                    pCbtd->setResponseContext(msg->response->context);
+
+                    callback_test(_ret);
+
+                    pCbtd->delResponseContext();
+
+                    return tars::TARSSERVERSUCCESS;
+
+                }
+                case 1:
+                {
+                    if (msg->response->iRet != tars::TARSSERVERSUCCESS)
+                    {
+                        callback_testInt_exception(msg->response->iRet);
+
+                        return msg->response->iRet;
+                    }
+                    tars::TarsInputStream<tars::BufferReader> _is;
+
+                    _is.setBuffer(msg->response->sBuffer);
+                    tars::Int32 _ret;
+                    _is.read(_ret, 0, true);
+
+                    tars::Int32 iOut;
+                    _is.read(iOut, 2, true);
+                    CallbackThreadData * pCbtd = CallbackThreadData::getData();
+                    assert(pCbtd != NULL);
+
+                    pCbtd->setResponseContext(msg->response->context);
+
+                    callback_testInt(_ret, iOut);
+
+                    pCbtd->delResponseContext();
+
+                    return tars::TARSSERVERSUCCESS;
+
+                }
+                case 2:
+                {
+                    if (msg->response->iRet != tars::TARSSERVERSUCCESS)
+                    {
+                        callback_testStr_exception(msg->response->iRet);
+
+                        return msg->response->iRet;
+                    }
+                    tars::TarsInputStream<tars::BufferReader> _is;
+
+                    _is.setBuffer(msg->response->sBuffer);
+                    tars::Int32 _ret;
+                    _is.read(_ret, 0, true);
+
+                    std::string sOut;
+                    _is.read(sOut, 2, true);
+                    CallbackThreadData * pCbtd = CallbackThreadData::getData();
+                    assert(pCbtd != NULL);
+
+                    pCbtd->setResponseContext(msg->response->context);
+
+                    callback_testStr(_ret, sOut);
+
+                    pCbtd->delResponseContext();
+
+                    return tars::TARSSERVERSUCCESS;
+
+                }
+            }
+            return tars::TARSSERVERNOFUNCERR;
+        }
+
+    };
+    typedef tars::TC_AutoPtr<AServantPrxCallback> AServantPrxCallbackPtr;
+
+    /* callback of coroutine async proxy for client */
+    class AServantCoroPrxCallback: public AServantPrxCallback
+    {
+    public:
+        virtual ~AServantCoroPrxCallback(){}
+    public:
+        virtual const map<std::string, std::string> & getResponseContext() const { return _mRspContext; }
+
+        virtual void setResponseContext(const map<std::string, std::string> &mContext) { _mRspContext = mContext; }
+
+    public:
+        int onDispatch(tars::ReqMessagePtr msg)
+        {
+            static ::std::string __AServant_all[]=
+            {
+                "test",
+                "testInt",
+                "testStr"
+            };
+
+            pair<string*, string*> r = equal_range(__AServant_all, __AServant_all+3, string(msg->request.sFuncName));
+            if(r.first == r.second) return tars::TARSSERVERNOFUNCERR;
+            switch(r.first - __AServant_all)
+            {
+                case 0:
+                {
+                    if (msg->response->iRet != tars::TARSSERVERSUCCESS)
+                    {
+                        callback_test_exception(msg->response->iRet);
+
+                        return msg->response->iRet;
+                    }
+                    tars::TarsInputStream<tars::BufferReader> _is;
+
+                    _is.setBuffer(msg->response->sBuffer);
+                    try
+                    {
+                        tars::Int32 _ret;
+                        _is.read(_ret, 0, true);
+
+                        setResponseContext(msg->response->context);
+
+                        callback_test(_ret);
+
+                    }
+                    catch(std::exception &ex)
+                    {
+                        callback_test_exception(tars::TARSCLIENTDECODEERR);
+
+                        return tars::TARSCLIENTDECODEERR;
+                    }
+                    catch(...)
+                    {
+                        callback_test_exception(tars::TARSCLIENTDECODEERR);
+
+                        return tars::TARSCLIENTDECODEERR;
+                    }
+
+                    return tars::TARSSERVERSUCCESS;
+
+                }
+                case 1:
+                {
+                    if (msg->response->iRet != tars::TARSSERVERSUCCESS)
+                    {
+                        callback_testInt_exception(msg->response->iRet);
+
+                        return msg->response->iRet;
+                    }
+                    tars::TarsInputStream<tars::BufferReader> _is;
+
+                    _is.setBuffer(msg->response->sBuffer);
+                    try
+                    {
+                        tars::Int32 _ret;
+                        _is.read(_ret, 0, true);
+
+                        tars::Int32 iOut;
+                        _is.read(iOut, 2, true);
+                        setResponseContext(msg->response->context);
+
+                        callback_testInt(_ret, iOut);
+
+                    }
+                    catch(std::exception &ex)
+                    {
+                        callback_testInt_exception(tars::TARSCLIENTDECODEERR);
+
+                        return tars::TARSCLIENTDECODEERR;
+                    }
+                    catch(...)
+                    {
+                        callback_testInt_exception(tars::TARSCLIENTDECODEERR);
+
+                        return tars::TARSCLIENTDECODEERR;
+                    }
+
+                    return tars::TARSSERVERSUCCESS;
+
+                }
+                case 2:
+                {
+                    if (msg->response->iRet != tars::TARSSERVERSUCCESS)
+                    {
+                        callback_testStr_exception(msg->response->iRet);
+
+                        return msg->response->iRet;
+                    }
+                    tars::TarsInputStream<tars::BufferReader> _is;
+
+                    _is.setBuffer(msg->response->sBuffer);
+                    try
+                    {
+                        tars::Int32 _ret;
+                        _is.read(_ret, 0, true);
+
+                        std::string sOut;
+                        _is.read(sOut, 2, true);
+                        setResponseContext(msg->response->context);
+
+                        callback_testStr(_ret, sOut);
+
+                    }
+                    catch(std::exception &ex)
+                    {
+                        callback_testStr_exception(tars::TARSCLIENTDECODEERR);
+
+                        return tars::TARSCLIENTDECODEERR;
+                    }
+                    catch(...)
+                    {
+                        callback_testStr_exception(tars::TARSCLIENTDECODEERR);
+
+                        return tars::TARSCLIENTDECODEERR;
+                    }
+
+                    return tars::TARSSERVERSUCCESS;
+
+                }
+            }
+            return tars::TARSSERVERNOFUNCERR;
+        }
+
+    protected:
+        map<std::string, std::string> _mRspContext;
+    };
+    typedef tars::TC_AutoPtr<AServantCoroPrxCallback> AServantCoroPrxCallbackPtr;
+
+    /* proxy for client */
+    class AServantProxy : public tars::ServantProxy
+    {
+    public:
+        typedef map<string, string> TARS_CONTEXT;
+        tars::Int32 test(const map<string, string> &context = TARS_CONTEXT(),map<string, string> * pResponseContext = NULL)
+        {
+            tars::TarsOutputStream<tars::BufferWriterVector> _os;
+            std::map<string, string> _mStatus;
+            shared_ptr<tars::ResponsePacket> rep = tars_invoke(tars::TARSNORMAL,"test", _os, context, _mStatus);
+            if(pResponseContext)
+            {
+                pResponseContext->swap(rep->context);
+            }
+
+            tars::TarsInputStream<tars::BufferReader> _is;
+            _is.setBuffer(rep->sBuffer);
+            tars::Int32 _ret;
+            _is.read(_ret, 0, true);
+            return _ret;
+        }
+
+        void async_test(AServantPrxCallbackPtr callback,const map<string, string>& context = TARS_CONTEXT())
+        {
+            tars::TarsOutputStream<tars::BufferWriterVector> _os;
+            std::map<string, string> _mStatus;
+            tars_invoke_async(tars::TARSNORMAL,"test", _os, context, _mStatus, callback);
+        }
+        
+        void coro_test(AServantCoroPrxCallbackPtr callback,const map<string, string>& context = TARS_CONTEXT())
+        {
+            tars::TarsOutputStream<tars::BufferWriterVector> _os;
+            std::map<string, string> _mStatus;
+            tars_invoke_async(tars::TARSNORMAL,"test", _os, context, _mStatus, callback);
+        }
+
+        tars::Int32 testInt(tars::Int32 iIn,tars::Int32 &iOut,const map<string, string> &context = TARS_CONTEXT(),map<string, string> * pResponseContext = NULL)
+        {
+            tars::TarsOutputStream<tars::BufferWriterVector> _os;
+            _os.write(iIn, 1);
+            _os.write(iOut, 2);
+            std::map<string, string> _mStatus;
+            shared_ptr<tars::ResponsePacket> rep = tars_invoke(tars::TARSNORMAL,"testInt", _os, context, _mStatus);
+            if(pResponseContext)
+            {
+                pResponseContext->swap(rep->context);
+            }
+
+            tars::TarsInputStream<tars::BufferReader> _is;
+            _is.setBuffer(rep->sBuffer);
+            tars::Int32 _ret;
+            _is.read(_ret, 0, true);
+            _is.read(iOut, 2, true);
+            return _ret;
+        }
+
+        void async_testInt(AServantPrxCallbackPtr callback,tars::Int32 iIn,const map<string, string>& context = TARS_CONTEXT())
+        {
+            tars::TarsOutputStream<tars::BufferWriterVector> _os;
+            _os.write(iIn, 1);
+            std::map<string, string> _mStatus;
+            tars_invoke_async(tars::TARSNORMAL,"testInt", _os, context, _mStatus, callback);
+        }
+        
+        void coro_testInt(AServantCoroPrxCallbackPtr callback,tars::Int32 iIn,const map<string, string>& context = TARS_CONTEXT())
+        {
+            tars::TarsOutputStream<tars::BufferWriterVector> _os;
+            _os.write(iIn, 1);
+            std::map<string, string> _mStatus;
+            tars_invoke_async(tars::TARSNORMAL,"testInt", _os, context, _mStatus, callback);
+        }
+
+        tars::Int32 testStr(const std::string & sIn,std::string &sOut,const map<string, string> &context = TARS_CONTEXT(),map<string, string> * pResponseContext = NULL)
+        {
+            tars::TarsOutputStream<tars::BufferWriterVector> _os;
+            _os.write(sIn, 1);
+            _os.write(sOut, 2);
+            std::map<string, string> _mStatus;
+            shared_ptr<tars::ResponsePacket> rep = tars_invoke(tars::TARSNORMAL,"testStr", _os, context, _mStatus);
+            if(pResponseContext)
+            {
+                pResponseContext->swap(rep->context);
+            }
+
+            tars::TarsInputStream<tars::BufferReader> _is;
+            _is.setBuffer(rep->sBuffer);
+            tars::Int32 _ret;
+            _is.read(_ret, 0, true);
+            _is.read(sOut, 2, true);
+            return _ret;
+        }
+
+        void async_testStr(AServantPrxCallbackPtr callback,const std::string &sIn,const map<string, string>& context = TARS_CONTEXT())
+        {
+            tars::TarsOutputStream<tars::BufferWriterVector> _os;
+            _os.write(sIn, 1);
+            std::map<string, string> _mStatus;
+            tars_invoke_async(tars::TARSNORMAL,"testStr", _os, context, _mStatus, callback);
+        }
+        
+        void coro_testStr(AServantCoroPrxCallbackPtr callback,const std::string &sIn,const map<string, string>& context = TARS_CONTEXT())
+        {
+            tars::TarsOutputStream<tars::BufferWriterVector> _os;
+            _os.write(sIn, 1);
+            std::map<string, string> _mStatus;
+            tars_invoke_async(tars::TARSNORMAL,"testStr", _os, context, _mStatus, callback);
+        }
+
+        AServantProxy* tars_hash(int64_t key)
+        {
+            return (AServantProxy*)ServantProxy::tars_hash(key);
+        }
+
+        AServantProxy* tars_consistent_hash(int64_t key)
+        {
+            return (AServantProxy*)ServantProxy::tars_consistent_hash(key);
+        }
+
+        AServantProxy* tars_set_timeout(int msecond)
+        {
+            return (AServantProxy*)ServantProxy::tars_set_timeout(msecond);
+        }
+
+        static const char* tars_prxname() { return "AServantProxy"; }
+    };
+    typedef tars::TC_AutoPtr<AServantProxy> AServantPrx;
+
+    /* servant for server */
+    class AServant : public tars::Servant
+    {
+    public:
+        virtual ~AServant(){}
+        virtual tars::Int32 test(tars::TarsCurrentPtr current) = 0;
+        static void async_response_test(tars::TarsCurrentPtr current, tars::Int32 _ret)
+        {
+            if (current->getRequestVersion() == TUPVERSION )
+            {
+                UniAttribute<tars::BufferWriterVector, tars::BufferReader>  tarsAttr;
+                tarsAttr.setVersion(current->getRequestVersion());
+                tarsAttr.put("", _ret);
+
+                vector<char> sTupResponseBuffer;
+                tarsAttr.encode(sTupResponseBuffer);
+                current->sendResponse(tars::TARSSERVERSUCCESS, sTupResponseBuffer);
+            }
+            else
+            {
+                tars::TarsOutputStream<tars::BufferWriterVector> _os;
+                _os.write(_ret, 0);
+
+                current->sendResponse(tars::TARSSERVERSUCCESS, _os.getByteBuffer());
+            }
+        }
+
+        virtual tars::Int32 testInt(tars::Int32 iIn,tars::Int32 &iOut,tars::TarsCurrentPtr current) = 0;
+        static void async_response_testInt(tars::TarsCurrentPtr current, tars::Int32 _ret, tars::Int32 iOut)
+        {
+            if (current->getRequestVersion() == TUPVERSION )
+            {
+                UniAttribute<tars::BufferWriterVector, tars::BufferReader>  tarsAttr;
+                tarsAttr.setVersion(current->getRequestVersion());
+                tarsAttr.put("", _ret);
+                tarsAttr.put("iOut", iOut);
+
+                vector<char> sTupResponseBuffer;
+                tarsAttr.encode(sTupResponseBuffer);
+                current->sendResponse(tars::TARSSERVERSUCCESS, sTupResponseBuffer);
+            }
+            else
+            {
+                tars::TarsOutputStream<tars::BufferWriterVector> _os;
+                _os.write(_ret, 0);
+
+                _os.write(iOut, 2);
+
+                current->sendResponse(tars::TARSSERVERSUCCESS, _os.getByteBuffer());
+            }
+        }
+
+        virtual tars::Int32 testStr(const std::string & sIn,std::string &sOut,tars::TarsCurrentPtr current) = 0;
+        static void async_response_testStr(tars::TarsCurrentPtr current, tars::Int32 _ret, const std::string &sOut)
+        {
+            if (current->getRequestVersion() == TUPVERSION )
+            {
+                UniAttribute<tars::BufferWriterVector, tars::BufferReader>  tarsAttr;
+                tarsAttr.setVersion(current->getRequestVersion());
+                tarsAttr.put("", _ret);
+                tarsAttr.put("sOut", sOut);
+
+                vector<char> sTupResponseBuffer;
+                tarsAttr.encode(sTupResponseBuffer);
+                current->sendResponse(tars::TARSSERVERSUCCESS, sTupResponseBuffer);
+            }
+            else
+            {
+                tars::TarsOutputStream<tars::BufferWriterVector> _os;
+                _os.write(_ret, 0);
+
+                _os.write(sOut, 2);
+
+                current->sendResponse(tars::TARSSERVERSUCCESS, _os.getByteBuffer());
+            }
+        }
+
+    public:
+        int onDispatch(tars::TarsCurrentPtr _current, vector<char> &_sResponseBuffer)
+        {
+            static ::std::string __Test__AServant_all[]=
+            {
+                "test",
+                "testInt",
+                "testStr"
+            };
+
+            pair<string*, string*> r = equal_range(__Test__AServant_all, __Test__AServant_all+3, _current->getFuncName());
+            if(r.first == r.second) return tars::TARSSERVERNOFUNCERR;
+            switch(r.first - __Test__AServant_all)
+            {
+                case 0:
+                {
+                    tars::TarsInputStream<tars::BufferReader> _is;
+                    _is.setBuffer(_current->getRequestBuffer());
+                    if (_current->getRequestVersion() == TUPVERSION)
+                    {
+                        UniAttribute<tars::BufferWriterVector, tars::BufferReader>  tarsAttr;
+                        tarsAttr.setVersion(_current->getRequestVersion());
+                        tarsAttr.decode(_current->getRequestBuffer());
+                    }
+                    else
+                    {
+                    }
+                    tars::Int32 _ret = test(_current);
+                    if(_current->isResponse())
+                    {
+                        if (_current->getRequestVersion() == TUPVERSION )
+                        {
+                            UniAttribute<tars::BufferWriterVector, tars::BufferReader>  tarsAttr;
+                            tarsAttr.setVersion(_current->getRequestVersion());
+                            tarsAttr.put("", _ret);
+                            tarsAttr.encode(_sResponseBuffer);
+                        }
+                        else
+                        {
+                            tars::TarsOutputStream<tars::BufferWriterVector> _os;
+                            _os.write(_ret, 0);
+                            _os.swap(_sResponseBuffer);
+                        }
+                    }
+                    return tars::TARSSERVERSUCCESS;
+
+                }
+                case 1:
+                {
+                    tars::TarsInputStream<tars::BufferReader> _is;
+                    _is.setBuffer(_current->getRequestBuffer());
+                    tars::Int32 iIn;
+                    tars::Int32 iOut;
+                    if (_current->getRequestVersion() == TUPVERSION)
+                    {
+                        UniAttribute<tars::BufferWriterVector, tars::BufferReader>  tarsAttr;
+                        tarsAttr.setVersion(_current->getRequestVersion());
+                        tarsAttr.decode(_current->getRequestBuffer());
+                        tarsAttr.get("iIn", iIn);
+                        tarsAttr.getByDefault("iOut", iOut, iOut);
+                    }
+                    else
+                    {
+                        _is.read(iIn, 1, true);
+                        _is.read(iOut, 2, false);
+                    }
+                    tars::Int32 _ret = testInt(iIn,iOut, _current);
+                    if(_current->isResponse())
+                    {
+                        if (_current->getRequestVersion() == TUPVERSION )
+                        {
+                            UniAttribute<tars::BufferWriterVector, tars::BufferReader>  tarsAttr;
+                            tarsAttr.setVersion(_current->getRequestVersion());
+                            tarsAttr.put("", _ret);
+                            tarsAttr.put("iOut", iOut);
+                            tarsAttr.encode(_sResponseBuffer);
+                        }
+                        else
+                        {
+                            tars::TarsOutputStream<tars::BufferWriterVector> _os;
+                            _os.write(_ret, 0);
+                            _os.write(iOut, 2);
+                            _os.swap(_sResponseBuffer);
+                        }
+                    }
+                    return tars::TARSSERVERSUCCESS;
+
+                }
+                case 2:
+                {
+                    tars::TarsInputStream<tars::BufferReader> _is;
+                    _is.setBuffer(_current->getRequestBuffer());
+                    std::string sIn;
+                    std::string sOut;
+                    if (_current->getRequestVersion() == TUPVERSION)
+                    {
+                        UniAttribute<tars::BufferWriterVector, tars::BufferReader>  tarsAttr;
+                        tarsAttr.setVersion(_current->getRequestVersion());
+                        tarsAttr.decode(_current->getRequestBuffer());
+                        tarsAttr.get("sIn", sIn);
+                        tarsAttr.getByDefault("sOut", sOut, sOut);
+                    }
+                    else
+                    {
+                        _is.read(sIn, 1, true);
+                        _is.read(sOut, 2, false);
+                    }
+                    tars::Int32 _ret = testStr(sIn,sOut, _current);
+                    if(_current->isResponse())
+                    {
+                        if (_current->getRequestVersion() == TUPVERSION )
+                        {
+                            UniAttribute<tars::BufferWriterVector, tars::BufferReader>  tarsAttr;
+                            tarsAttr.setVersion(_current->getRequestVersion());
+                            tarsAttr.put("", _ret);
+                            tarsAttr.put("sOut", sOut);
+                            tarsAttr.encode(_sResponseBuffer);
+                        }
+                        else
+                        {
+                            tars::TarsOutputStream<tars::BufferWriterVector> _os;
+                            _os.write(_ret, 0);
+                            _os.write(sOut, 2);
+                            _os.swap(_sResponseBuffer);
+                        }
+                    }
+                    return tars::TARSSERVERSUCCESS;
+
+                }
+            }
+            return tars::TARSSERVERNOFUNCERR;
+        }
+    };
+
+
+}
+
+
+
+#endif
diff --git a/examples/CoroutineDemo/BServer/AServant.h b/examples/CoroutineDemo/BServer/AServant.h
new file mode 100644
index 0000000..afa315d
--- /dev/null
+++ b/examples/CoroutineDemo/BServer/AServant.h
@@ -0,0 +1,648 @@
+// **********************************************************************
+// This file was generated by a TARS parser!
+// TARS version 1.4.0.
+// **********************************************************************
+
+#ifndef __ASERVANT_H_
+#define __ASERVANT_H_
+
+#include <map>
+#include <string>
+#include <vector>
+#include "tup/Tars.h"
+#include "tup/TarsJson.h"
+using namespace std;
+#include "servant/ServantProxy.h"
+#include "servant/Servant.h"
+
+
+namespace Test
+{
+
+    /* callback of async proxy for client */
+    class AServantPrxCallback: public tars::ServantProxyCallback
+    {
+    public:
+        virtual ~AServantPrxCallback(){}
+        virtual void callback_test(tars::Int32 ret)
+        { throw std::runtime_error("callback_test() override incorrect."); }
+        virtual void callback_test_exception(tars::Int32 ret)
+        { throw std::runtime_error("callback_test_exception() override incorrect."); }
+
+        virtual void callback_testInt(tars::Int32 ret, tars::Int32 iOut)
+        { throw std::runtime_error("callback_testInt() override incorrect."); }
+        virtual void callback_testInt_exception(tars::Int32 ret)
+        { throw std::runtime_error("callback_testInt_exception() override incorrect."); }
+
+        virtual void callback_testStr(tars::Int32 ret,  const std::string& sOut)
+        { throw std::runtime_error("callback_testStr() override incorrect."); }
+        virtual void callback_testStr_exception(tars::Int32 ret)
+        { throw std::runtime_error("callback_testStr_exception() override incorrect."); }
+
+    public:
+        virtual const map<std::string, std::string> & getResponseContext() const
+        {
+            CallbackThreadData * pCbtd = CallbackThreadData::getData();
+            assert(pCbtd != NULL);
+
+            if(!pCbtd->getContextValid())
+            {
+                throw TC_Exception("cann't get response context");
+            }
+            return pCbtd->getResponseContext();
+        }
+
+    public:
+        virtual int onDispatch(tars::ReqMessagePtr msg)
+        {
+            static ::std::string __AServant_all[]=
+            {
+                "test",
+                "testInt",
+                "testStr"
+            };
+            pair<string*, string*> r = equal_range(__AServant_all, __AServant_all+3, string(msg->request.sFuncName));
+            if(r.first == r.second) return tars::TARSSERVERNOFUNCERR;
+            switch(r.first - __AServant_all)
+            {
+                case 0:
+                {
+                    if (msg->response->iRet != tars::TARSSERVERSUCCESS)
+                    {
+                        callback_test_exception(msg->response->iRet);
+
+                        return msg->response->iRet;
+                    }
+                    tars::TarsInputStream<tars::BufferReader> _is;
+
+                    _is.setBuffer(msg->response->sBuffer);
+                    tars::Int32 _ret;
+                    _is.read(_ret, 0, true);
+
+                    CallbackThreadData * pCbtd = CallbackThreadData::getData();
+                    assert(pCbtd != NULL);
+
+                    pCbtd->setResponseContext(msg->response->context);
+
+                    callback_test(_ret);
+
+                    pCbtd->delResponseContext();
+
+                    return tars::TARSSERVERSUCCESS;
+
+                }
+                case 1:
+                {
+                    if (msg->response->iRet != tars::TARSSERVERSUCCESS)
+                    {
+                        callback_testInt_exception(msg->response->iRet);
+
+                        return msg->response->iRet;
+                    }
+                    tars::TarsInputStream<tars::BufferReader> _is;
+
+                    _is.setBuffer(msg->response->sBuffer);
+                    tars::Int32 _ret;
+                    _is.read(_ret, 0, true);
+
+                    tars::Int32 iOut;
+                    _is.read(iOut, 2, true);
+                    CallbackThreadData * pCbtd = CallbackThreadData::getData();
+                    assert(pCbtd != NULL);
+
+                    pCbtd->setResponseContext(msg->response->context);
+
+                    callback_testInt(_ret, iOut);
+
+                    pCbtd->delResponseContext();
+
+                    return tars::TARSSERVERSUCCESS;
+
+                }
+                case 2:
+                {
+                    if (msg->response->iRet != tars::TARSSERVERSUCCESS)
+                    {
+                        callback_testStr_exception(msg->response->iRet);
+
+                        return msg->response->iRet;
+                    }
+                    tars::TarsInputStream<tars::BufferReader> _is;
+
+                    _is.setBuffer(msg->response->sBuffer);
+                    tars::Int32 _ret;
+                    _is.read(_ret, 0, true);
+
+                    std::string sOut;
+                    _is.read(sOut, 2, true);
+                    CallbackThreadData * pCbtd = CallbackThreadData::getData();
+                    assert(pCbtd != NULL);
+
+                    pCbtd->setResponseContext(msg->response->context);
+
+                    callback_testStr(_ret, sOut);
+
+                    pCbtd->delResponseContext();
+
+                    return tars::TARSSERVERSUCCESS;
+
+                }
+            }
+            return tars::TARSSERVERNOFUNCERR;
+        }
+
+    };
+    typedef tars::TC_AutoPtr<AServantPrxCallback> AServantPrxCallbackPtr;
+
+    /* callback of coroutine async proxy for client */
+    class AServantCoroPrxCallback: public AServantPrxCallback
+    {
+    public:
+        virtual ~AServantCoroPrxCallback(){}
+    public:
+        virtual const map<std::string, std::string> & getResponseContext() const { return _mRspContext; }
+
+        virtual void setResponseContext(const map<std::string, std::string> &mContext) { _mRspContext = mContext; }
+
+    public:
+        int onDispatch(tars::ReqMessagePtr msg)
+        {
+            static ::std::string __AServant_all[]=
+            {
+                "test",
+                "testInt",
+                "testStr"
+            };
+
+            pair<string*, string*> r = equal_range(__AServant_all, __AServant_all+3, string(msg->request.sFuncName));
+            if(r.first == r.second) return tars::TARSSERVERNOFUNCERR;
+            switch(r.first - __AServant_all)
+            {
+                case 0:
+                {
+                    if (msg->response->iRet != tars::TARSSERVERSUCCESS)
+                    {
+                        callback_test_exception(msg->response->iRet);
+
+                        return msg->response->iRet;
+                    }
+                    tars::TarsInputStream<tars::BufferReader> _is;
+
+                    _is.setBuffer(msg->response->sBuffer);
+                    try
+                    {
+                        tars::Int32 _ret;
+                        _is.read(_ret, 0, true);
+
+                        setResponseContext(msg->response->context);
+
+                        callback_test(_ret);
+
+                    }
+                    catch(std::exception &ex)
+                    {
+                        callback_test_exception(tars::TARSCLIENTDECODEERR);
+
+                        return tars::TARSCLIENTDECODEERR;
+                    }
+                    catch(...)
+                    {
+                        callback_test_exception(tars::TARSCLIENTDECODEERR);
+
+                        return tars::TARSCLIENTDECODEERR;
+                    }
+
+                    return tars::TARSSERVERSUCCESS;
+
+                }
+                case 1:
+                {
+                    if (msg->response->iRet != tars::TARSSERVERSUCCESS)
+                    {
+                        callback_testInt_exception(msg->response->iRet);
+
+                        return msg->response->iRet;
+                    }
+                    tars::TarsInputStream<tars::BufferReader> _is;
+
+                    _is.setBuffer(msg->response->sBuffer);
+                    try
+                    {
+                        tars::Int32 _ret;
+                        _is.read(_ret, 0, true);
+
+                        tars::Int32 iOut;
+                        _is.read(iOut, 2, true);
+                        setResponseContext(msg->response->context);
+
+                        callback_testInt(_ret, iOut);
+
+                    }
+                    catch(std::exception &ex)
+                    {
+                        callback_testInt_exception(tars::TARSCLIENTDECODEERR);
+
+                        return tars::TARSCLIENTDECODEERR;
+                    }
+                    catch(...)
+                    {
+                        callback_testInt_exception(tars::TARSCLIENTDECODEERR);
+
+                        return tars::TARSCLIENTDECODEERR;
+                    }
+
+                    return tars::TARSSERVERSUCCESS;
+
+                }
+                case 2:
+                {
+                    if (msg->response->iRet != tars::TARSSERVERSUCCESS)
+                    {
+                        callback_testStr_exception(msg->response->iRet);
+
+                        return msg->response->iRet;
+                    }
+                    tars::TarsInputStream<tars::BufferReader> _is;
+
+                    _is.setBuffer(msg->response->sBuffer);
+                    try
+                    {
+                        tars::Int32 _ret;
+                        _is.read(_ret, 0, true);
+
+                        std::string sOut;
+                        _is.read(sOut, 2, true);
+                        setResponseContext(msg->response->context);
+
+                        callback_testStr(_ret, sOut);
+
+                    }
+                    catch(std::exception &ex)
+                    {
+                        callback_testStr_exception(tars::TARSCLIENTDECODEERR);
+
+                        return tars::TARSCLIENTDECODEERR;
+                    }
+                    catch(...)
+                    {
+                        callback_testStr_exception(tars::TARSCLIENTDECODEERR);
+
+                        return tars::TARSCLIENTDECODEERR;
+                    }
+
+                    return tars::TARSSERVERSUCCESS;
+
+                }
+            }
+            return tars::TARSSERVERNOFUNCERR;
+        }
+
+    protected:
+        map<std::string, std::string> _mRspContext;
+    };
+    typedef tars::TC_AutoPtr<AServantCoroPrxCallback> AServantCoroPrxCallbackPtr;
+
+    /* proxy for client */
+    class AServantProxy : public tars::ServantProxy
+    {
+    public:
+        typedef map<string, string> TARS_CONTEXT;
+        tars::Int32 test(const map<string, string> &context = TARS_CONTEXT(),map<string, string> * pResponseContext = NULL)
+        {
+            tars::TarsOutputStream<tars::BufferWriterVector> _os;
+            std::map<string, string> _mStatus;
+            shared_ptr<tars::ResponsePacket> rep = tars_invoke(tars::TARSNORMAL,"test", _os, context, _mStatus);
+            if(pResponseContext)
+            {
+                pResponseContext->swap(rep->context);
+            }
+
+            tars::TarsInputStream<tars::BufferReader> _is;
+            _is.setBuffer(rep->sBuffer);
+            tars::Int32 _ret;
+            _is.read(_ret, 0, true);
+            return _ret;
+        }
+
+        void async_test(AServantPrxCallbackPtr callback,const map<string, string>& context = TARS_CONTEXT())
+        {
+            tars::TarsOutputStream<tars::BufferWriterVector> _os;
+            std::map<string, string> _mStatus;
+            tars_invoke_async(tars::TARSNORMAL,"test", _os, context, _mStatus, callback);
+        }
+        
+        void coro_test(AServantCoroPrxCallbackPtr callback,const map<string, string>& context = TARS_CONTEXT())
+        {
+            tars::TarsOutputStream<tars::BufferWriterVector> _os;
+            std::map<string, string> _mStatus;
+            tars_invoke_async(tars::TARSNORMAL,"test", _os, context, _mStatus, callback);
+        }
+
+        tars::Int32 testInt(tars::Int32 iIn,tars::Int32 &iOut,const map<string, string> &context = TARS_CONTEXT(),map<string, string> * pResponseContext = NULL)
+        {
+            tars::TarsOutputStream<tars::BufferWriterVector> _os;
+            _os.write(iIn, 1);
+            _os.write(iOut, 2);
+            std::map<string, string> _mStatus;
+            shared_ptr<tars::ResponsePacket> rep = tars_invoke(tars::TARSNORMAL,"testInt", _os, context, _mStatus);
+            if(pResponseContext)
+            {
+                pResponseContext->swap(rep->context);
+            }
+
+            tars::TarsInputStream<tars::BufferReader> _is;
+            _is.setBuffer(rep->sBuffer);
+            tars::Int32 _ret;
+            _is.read(_ret, 0, true);
+            _is.read(iOut, 2, true);
+            return _ret;
+        }
+
+        void async_testInt(AServantPrxCallbackPtr callback,tars::Int32 iIn,const map<string, string>& context = TARS_CONTEXT())
+        {
+            tars::TarsOutputStream<tars::BufferWriterVector> _os;
+            _os.write(iIn, 1);
+            std::map<string, string> _mStatus;
+            tars_invoke_async(tars::TARSNORMAL,"testInt", _os, context, _mStatus, callback);
+        }
+        
+        void coro_testInt(AServantCoroPrxCallbackPtr callback,tars::Int32 iIn,const map<string, string>& context = TARS_CONTEXT())
+        {
+            tars::TarsOutputStream<tars::BufferWriterVector> _os;
+            _os.write(iIn, 1);
+            std::map<string, string> _mStatus;
+            tars_invoke_async(tars::TARSNORMAL,"testInt", _os, context, _mStatus, callback);
+        }
+
+        tars::Int32 testStr(const std::string & sIn,std::string &sOut,const map<string, string> &context = TARS_CONTEXT(),map<string, string> * pResponseContext = NULL)
+        {
+            tars::TarsOutputStream<tars::BufferWriterVector> _os;
+            _os.write(sIn, 1);
+            _os.write(sOut, 2);
+            std::map<string, string> _mStatus;
+            shared_ptr<tars::ResponsePacket> rep = tars_invoke(tars::TARSNORMAL,"testStr", _os, context, _mStatus);
+            if(pResponseContext)
+            {
+                pResponseContext->swap(rep->context);
+            }
+
+            tars::TarsInputStream<tars::BufferReader> _is;
+            _is.setBuffer(rep->sBuffer);
+            tars::Int32 _ret;
+            _is.read(_ret, 0, true);
+            _is.read(sOut, 2, true);
+            return _ret;
+        }
+
+        void async_testStr(AServantPrxCallbackPtr callback,const std::string &sIn,const map<string, string>& context = TARS_CONTEXT())
+        {
+            tars::TarsOutputStream<tars::BufferWriterVector> _os;
+            _os.write(sIn, 1);
+            std::map<string, string> _mStatus;
+            tars_invoke_async(tars::TARSNORMAL,"testStr", _os, context, _mStatus, callback);
+        }
+        
+        void coro_testStr(AServantCoroPrxCallbackPtr callback,const std::string &sIn,const map<string, string>& context = TARS_CONTEXT())
+        {
+            tars::TarsOutputStream<tars::BufferWriterVector> _os;
+            _os.write(sIn, 1);
+            std::map<string, string> _mStatus;
+            tars_invoke_async(tars::TARSNORMAL,"testStr", _os, context, _mStatus, callback);
+        }
+
+        AServantProxy* tars_hash(int64_t key)
+        {
+            return (AServantProxy*)ServantProxy::tars_hash(key);
+        }
+
+        AServantProxy* tars_consistent_hash(int64_t key)
+        {
+            return (AServantProxy*)ServantProxy::tars_consistent_hash(key);
+        }
+
+        AServantProxy* tars_set_timeout(int msecond)
+        {
+            return (AServantProxy*)ServantProxy::tars_set_timeout(msecond);
+        }
+
+        static const char* tars_prxname() { return "AServantProxy"; }
+    };
+    typedef tars::TC_AutoPtr<AServantProxy> AServantPrx;
+
+    /* servant for server */
+    class AServant : public tars::Servant
+    {
+    public:
+        virtual ~AServant(){}
+        virtual tars::Int32 test(tars::TarsCurrentPtr current) = 0;
+        static void async_response_test(tars::TarsCurrentPtr current, tars::Int32 _ret)
+        {
+            if (current->getRequestVersion() == TUPVERSION )
+            {
+                UniAttribute<tars::BufferWriterVector, tars::BufferReader>  tarsAttr;
+                tarsAttr.setVersion(current->getRequestVersion());
+                tarsAttr.put("", _ret);
+
+                vector<char> sTupResponseBuffer;
+                tarsAttr.encode(sTupResponseBuffer);
+                current->sendResponse(tars::TARSSERVERSUCCESS, sTupResponseBuffer);
+            }
+            else
+            {
+                tars::TarsOutputStream<tars::BufferWriterVector> _os;
+                _os.write(_ret, 0);
+
+                current->sendResponse(tars::TARSSERVERSUCCESS, _os.getByteBuffer());
+            }
+        }
+
+        virtual tars::Int32 testInt(tars::Int32 iIn,tars::Int32 &iOut,tars::TarsCurrentPtr current) = 0;
+        static void async_response_testInt(tars::TarsCurrentPtr current, tars::Int32 _ret, tars::Int32 iOut)
+        {
+            if (current->getRequestVersion() == TUPVERSION )
+            {
+                UniAttribute<tars::BufferWriterVector, tars::BufferReader>  tarsAttr;
+                tarsAttr.setVersion(current->getRequestVersion());
+                tarsAttr.put("", _ret);
+                tarsAttr.put("iOut", iOut);
+
+                vector<char> sTupResponseBuffer;
+                tarsAttr.encode(sTupResponseBuffer);
+                current->sendResponse(tars::TARSSERVERSUCCESS, sTupResponseBuffer);
+            }
+            else
+            {
+                tars::TarsOutputStream<tars::BufferWriterVector> _os;
+                _os.write(_ret, 0);
+
+                _os.write(iOut, 2);
+
+                current->sendResponse(tars::TARSSERVERSUCCESS, _os.getByteBuffer());
+            }
+        }
+
+        virtual tars::Int32 testStr(const std::string & sIn,std::string &sOut,tars::TarsCurrentPtr current) = 0;
+        static void async_response_testStr(tars::TarsCurrentPtr current, tars::Int32 _ret, const std::string &sOut)
+        {
+            if (current->getRequestVersion() == TUPVERSION )
+            {
+                UniAttribute<tars::BufferWriterVector, tars::BufferReader>  tarsAttr;
+                tarsAttr.setVersion(current->getRequestVersion());
+                tarsAttr.put("", _ret);
+                tarsAttr.put("sOut", sOut);
+
+                vector<char> sTupResponseBuffer;
+                tarsAttr.encode(sTupResponseBuffer);
+                current->sendResponse(tars::TARSSERVERSUCCESS, sTupResponseBuffer);
+            }
+            else
+            {
+                tars::TarsOutputStream<tars::BufferWriterVector> _os;
+                _os.write(_ret, 0);
+
+                _os.write(sOut, 2);
+
+                current->sendResponse(tars::TARSSERVERSUCCESS, _os.getByteBuffer());
+            }
+        }
+
+    public:
+        int onDispatch(tars::TarsCurrentPtr _current, vector<char> &_sResponseBuffer)
+        {
+            static ::std::string __Test__AServant_all[]=
+            {
+                "test",
+                "testInt",
+                "testStr"
+            };
+
+            pair<string*, string*> r = equal_range(__Test__AServant_all, __Test__AServant_all+3, _current->getFuncName());
+            if(r.first == r.second) return tars::TARSSERVERNOFUNCERR;
+            switch(r.first - __Test__AServant_all)
+            {
+                case 0:
+                {
+                    tars::TarsInputStream<tars::BufferReader> _is;
+                    _is.setBuffer(_current->getRequestBuffer());
+                    if (_current->getRequestVersion() == TUPVERSION)
+                    {
+                        UniAttribute<tars::BufferWriterVector, tars::BufferReader>  tarsAttr;
+                        tarsAttr.setVersion(_current->getRequestVersion());
+                        tarsAttr.decode(_current->getRequestBuffer());
+                    }
+                    else
+                    {
+                    }
+                    tars::Int32 _ret = test(_current);
+                    if(_current->isResponse())
+                    {
+                        if (_current->getRequestVersion() == TUPVERSION )
+                        {
+                            UniAttribute<tars::BufferWriterVector, tars::BufferReader>  tarsAttr;
+                            tarsAttr.setVersion(_current->getRequestVersion());
+                            tarsAttr.put("", _ret);
+                            tarsAttr.encode(_sResponseBuffer);
+                        }
+                        else
+                        {
+                            tars::TarsOutputStream<tars::BufferWriterVector> _os;
+                            _os.write(_ret, 0);
+                            _os.swap(_sResponseBuffer);
+                        }
+                    }
+                    return tars::TARSSERVERSUCCESS;
+
+                }
+                case 1:
+                {
+                    tars::TarsInputStream<tars::BufferReader> _is;
+                    _is.setBuffer(_current->getRequestBuffer());
+                    tars::Int32 iIn;
+                    tars::Int32 iOut;
+                    if (_current->getRequestVersion() == TUPVERSION)
+                    {
+                        UniAttribute<tars::BufferWriterVector, tars::BufferReader>  tarsAttr;
+                        tarsAttr.setVersion(_current->getRequestVersion());
+                        tarsAttr.decode(_current->getRequestBuffer());
+                        tarsAttr.get("iIn", iIn);
+                        tarsAttr.getByDefault("iOut", iOut, iOut);
+                    }
+                    else
+                    {
+                        _is.read(iIn, 1, true);
+                        _is.read(iOut, 2, false);
+                    }
+                    tars::Int32 _ret = testInt(iIn,iOut, _current);
+                    if(_current->isResponse())
+                    {
+                        if (_current->getRequestVersion() == TUPVERSION )
+                        {
+                            UniAttribute<tars::BufferWriterVector, tars::BufferReader>  tarsAttr;
+                            tarsAttr.setVersion(_current->getRequestVersion());
+                            tarsAttr.put("", _ret);
+                            tarsAttr.put("iOut", iOut);
+                            tarsAttr.encode(_sResponseBuffer);
+                        }
+                        else
+                        {
+                            tars::TarsOutputStream<tars::BufferWriterVector> _os;
+                            _os.write(_ret, 0);
+                            _os.write(iOut, 2);
+                            _os.swap(_sResponseBuffer);
+                        }
+                    }
+                    return tars::TARSSERVERSUCCESS;
+
+                }
+                case 2:
+                {
+                    tars::TarsInputStream<tars::BufferReader> _is;
+                    _is.setBuffer(_current->getRequestBuffer());
+                    std::string sIn;
+                    std::string sOut;
+                    if (_current->getRequestVersion() == TUPVERSION)
+                    {
+                        UniAttribute<tars::BufferWriterVector, tars::BufferReader>  tarsAttr;
+                        tarsAttr.setVersion(_current->getRequestVersion());
+                        tarsAttr.decode(_current->getRequestBuffer());
+                        tarsAttr.get("sIn", sIn);
+                        tarsAttr.getByDefault("sOut", sOut, sOut);
+                    }
+                    else
+                    {
+                        _is.read(sIn, 1, true);
+                        _is.read(sOut, 2, false);
+                    }
+                    tars::Int32 _ret = testStr(sIn,sOut, _current);
+                    if(_current->isResponse())
+                    {
+                        if (_current->getRequestVersion() == TUPVERSION )
+                        {
+                            UniAttribute<tars::BufferWriterVector, tars::BufferReader>  tarsAttr;
+                            tarsAttr.setVersion(_current->getRequestVersion());
+                            tarsAttr.put("", _ret);
+                            tarsAttr.put("sOut", sOut);
+                            tarsAttr.encode(_sResponseBuffer);
+                        }
+                        else
+                        {
+                            tars::TarsOutputStream<tars::BufferWriterVector> _os;
+                            _os.write(_ret, 0);
+                            _os.write(sOut, 2);
+                            _os.swap(_sResponseBuffer);
+                        }
+                    }
+                    return tars::TARSSERVERSUCCESS;
+
+                }
+            }
+            return tars::TARSSERVERNOFUNCERR;
+        }
+    };
+
+
+}
+
+
+
+#endif
diff --git a/examples/CoroutineDemo/BServer/BServant.h b/examples/CoroutineDemo/BServer/BServant.h
new file mode 100644
index 0000000..b3092d6
--- /dev/null
+++ b/examples/CoroutineDemo/BServer/BServant.h
@@ -0,0 +1,648 @@
+// **********************************************************************
+// This file was generated by a TARS parser!
+// TARS version 1.4.0.
+// **********************************************************************
+
+#ifndef __BSERVANT_H_
+#define __BSERVANT_H_
+
+#include <map>
+#include <string>
+#include <vector>
+#include "tup/Tars.h"
+#include "tup/TarsJson.h"
+using namespace std;
+#include "servant/ServantProxy.h"
+#include "servant/Servant.h"
+
+
+namespace Test
+{
+
+    /* callback of async proxy for client */
+    class BServantPrxCallback: public tars::ServantProxyCallback
+    {
+    public:
+        virtual ~BServantPrxCallback(){}
+        virtual void callback_test(tars::Int32 ret)
+        { throw std::runtime_error("callback_test() override incorrect."); }
+        virtual void callback_test_exception(tars::Int32 ret)
+        { throw std::runtime_error("callback_test_exception() override incorrect."); }
+
+        virtual void callback_testCoroParallel(tars::Int32 ret,  const std::string& sOut)
+        { throw std::runtime_error("callback_testCoroParallel() override incorrect."); }
+        virtual void callback_testCoroParallel_exception(tars::Int32 ret)
+        { throw std::runtime_error("callback_testCoroParallel_exception() override incorrect."); }
+
+        virtual void callback_testCoroSerial(tars::Int32 ret,  const std::string& sOut)
+        { throw std::runtime_error("callback_testCoroSerial() override incorrect."); }
+        virtual void callback_testCoroSerial_exception(tars::Int32 ret)
+        { throw std::runtime_error("callback_testCoroSerial_exception() override incorrect."); }
+
+    public:
+        virtual const map<std::string, std::string> & getResponseContext() const
+        {
+            CallbackThreadData * pCbtd = CallbackThreadData::getData();
+            assert(pCbtd != NULL);
+
+            if(!pCbtd->getContextValid())
+            {
+                throw TC_Exception("cann't get response context");
+            }
+            return pCbtd->getResponseContext();
+        }
+
+    public:
+        virtual int onDispatch(tars::ReqMessagePtr msg)
+        {
+            static ::std::string __BServant_all[]=
+            {
+                "test",
+                "testCoroParallel",
+                "testCoroSerial"
+            };
+            pair<string*, string*> r = equal_range(__BServant_all, __BServant_all+3, string(msg->request.sFuncName));
+            if(r.first == r.second) return tars::TARSSERVERNOFUNCERR;
+            switch(r.first - __BServant_all)
+            {
+                case 0:
+                {
+                    if (msg->response->iRet != tars::TARSSERVERSUCCESS)
+                    {
+                        callback_test_exception(msg->response->iRet);
+
+                        return msg->response->iRet;
+                    }
+                    tars::TarsInputStream<tars::BufferReader> _is;
+
+                    _is.setBuffer(msg->response->sBuffer);
+                    tars::Int32 _ret;
+                    _is.read(_ret, 0, true);
+
+                    CallbackThreadData * pCbtd = CallbackThreadData::getData();
+                    assert(pCbtd != NULL);
+
+                    pCbtd->setResponseContext(msg->response->context);
+
+                    callback_test(_ret);
+
+                    pCbtd->delResponseContext();
+
+                    return tars::TARSSERVERSUCCESS;
+
+                }
+                case 1:
+                {
+                    if (msg->response->iRet != tars::TARSSERVERSUCCESS)
+                    {
+                        callback_testCoroParallel_exception(msg->response->iRet);
+
+                        return msg->response->iRet;
+                    }
+                    tars::TarsInputStream<tars::BufferReader> _is;
+
+                    _is.setBuffer(msg->response->sBuffer);
+                    tars::Int32 _ret;
+                    _is.read(_ret, 0, true);
+
+                    std::string sOut;
+                    _is.read(sOut, 2, true);
+                    CallbackThreadData * pCbtd = CallbackThreadData::getData();
+                    assert(pCbtd != NULL);
+
+                    pCbtd->setResponseContext(msg->response->context);
+
+                    callback_testCoroParallel(_ret, sOut);
+
+                    pCbtd->delResponseContext();
+
+                    return tars::TARSSERVERSUCCESS;
+
+                }
+                case 2:
+                {
+                    if (msg->response->iRet != tars::TARSSERVERSUCCESS)
+                    {
+                        callback_testCoroSerial_exception(msg->response->iRet);
+
+                        return msg->response->iRet;
+                    }
+                    tars::TarsInputStream<tars::BufferReader> _is;
+
+                    _is.setBuffer(msg->response->sBuffer);
+                    tars::Int32 _ret;
+                    _is.read(_ret, 0, true);
+
+                    std::string sOut;
+                    _is.read(sOut, 2, true);
+                    CallbackThreadData * pCbtd = CallbackThreadData::getData();
+                    assert(pCbtd != NULL);
+
+                    pCbtd->setResponseContext(msg->response->context);
+
+                    callback_testCoroSerial(_ret, sOut);
+
+                    pCbtd->delResponseContext();
+
+                    return tars::TARSSERVERSUCCESS;
+
+                }
+            }
+            return tars::TARSSERVERNOFUNCERR;
+        }
+
+    };
+    typedef tars::TC_AutoPtr<BServantPrxCallback> BServantPrxCallbackPtr;
+
+    /* callback of coroutine async proxy for client */
+    class BServantCoroPrxCallback: public BServantPrxCallback
+    {
+    public:
+        virtual ~BServantCoroPrxCallback(){}
+    public:
+        virtual const map<std::string, std::string> & getResponseContext() const { return _mRspContext; }
+
+        virtual void setResponseContext(const map<std::string, std::string> &mContext) { _mRspContext = mContext; }
+
+    public:
+        int onDispatch(tars::ReqMessagePtr msg)
+        {
+            static ::std::string __BServant_all[]=
+            {
+                "test",
+                "testCoroParallel",
+                "testCoroSerial"
+            };
+
+            pair<string*, string*> r = equal_range(__BServant_all, __BServant_all+3, string(msg->request.sFuncName));
+            if(r.first == r.second) return tars::TARSSERVERNOFUNCERR;
+            switch(r.first - __BServant_all)
+            {
+                case 0:
+                {
+                    if (msg->response->iRet != tars::TARSSERVERSUCCESS)
+                    {
+                        callback_test_exception(msg->response->iRet);
+
+                        return msg->response->iRet;
+                    }
+                    tars::TarsInputStream<tars::BufferReader> _is;
+
+                    _is.setBuffer(msg->response->sBuffer);
+                    try
+                    {
+                        tars::Int32 _ret;
+                        _is.read(_ret, 0, true);
+
+                        setResponseContext(msg->response->context);
+
+                        callback_test(_ret);
+
+                    }
+                    catch(std::exception &ex)
+                    {
+                        callback_test_exception(tars::TARSCLIENTDECODEERR);
+
+                        return tars::TARSCLIENTDECODEERR;
+                    }
+                    catch(...)
+                    {
+                        callback_test_exception(tars::TARSCLIENTDECODEERR);
+
+                        return tars::TARSCLIENTDECODEERR;
+                    }
+
+                    return tars::TARSSERVERSUCCESS;
+
+                }
+                case 1:
+                {
+                    if (msg->response->iRet != tars::TARSSERVERSUCCESS)
+                    {
+                        callback_testCoroParallel_exception(msg->response->iRet);
+
+                        return msg->response->iRet;
+                    }
+                    tars::TarsInputStream<tars::BufferReader> _is;
+
+                    _is.setBuffer(msg->response->sBuffer);
+                    try
+                    {
+                        tars::Int32 _ret;
+                        _is.read(_ret, 0, true);
+
+                        std::string sOut;
+                        _is.read(sOut, 2, true);
+                        setResponseContext(msg->response->context);
+
+                        callback_testCoroParallel(_ret, sOut);
+
+                    }
+                    catch(std::exception &ex)
+                    {
+                        callback_testCoroParallel_exception(tars::TARSCLIENTDECODEERR);
+
+                        return tars::TARSCLIENTDECODEERR;
+                    }
+                    catch(...)
+                    {
+                        callback_testCoroParallel_exception(tars::TARSCLIENTDECODEERR);
+
+                        return tars::TARSCLIENTDECODEERR;
+                    }
+
+                    return tars::TARSSERVERSUCCESS;
+
+                }
+                case 2:
+                {
+                    if (msg->response->iRet != tars::TARSSERVERSUCCESS)
+                    {
+                        callback_testCoroSerial_exception(msg->response->iRet);
+
+                        return msg->response->iRet;
+                    }
+                    tars::TarsInputStream<tars::BufferReader> _is;
+
+                    _is.setBuffer(msg->response->sBuffer);
+                    try
+                    {
+                        tars::Int32 _ret;
+                        _is.read(_ret, 0, true);
+
+                        std::string sOut;
+                        _is.read(sOut, 2, true);
+                        setResponseContext(msg->response->context);
+
+                        callback_testCoroSerial(_ret, sOut);
+
+                    }
+                    catch(std::exception &ex)
+                    {
+                        callback_testCoroSerial_exception(tars::TARSCLIENTDECODEERR);
+
+                        return tars::TARSCLIENTDECODEERR;
+                    }
+                    catch(...)
+                    {
+                        callback_testCoroSerial_exception(tars::TARSCLIENTDECODEERR);
+
+                        return tars::TARSCLIENTDECODEERR;
+                    }
+
+                    return tars::TARSSERVERSUCCESS;
+
+                }
+            }
+            return tars::TARSSERVERNOFUNCERR;
+        }
+
+    protected:
+        map<std::string, std::string> _mRspContext;
+    };
+    typedef tars::TC_AutoPtr<BServantCoroPrxCallback> BServantCoroPrxCallbackPtr;
+
+    /* proxy for client */
+    class BServantProxy : public tars::ServantProxy
+    {
+    public:
+        typedef map<string, string> TARS_CONTEXT;
+        tars::Int32 test(const map<string, string> &context = TARS_CONTEXT(),map<string, string> * pResponseContext = NULL)
+        {
+            tars::TarsOutputStream<tars::BufferWriterVector> _os;
+            std::map<string, string> _mStatus;
+            shared_ptr<tars::ResponsePacket> rep = tars_invoke(tars::TARSNORMAL,"test", _os, context, _mStatus);
+            if(pResponseContext)
+            {
+                pResponseContext->swap(rep->context);
+            }
+
+            tars::TarsInputStream<tars::BufferReader> _is;
+            _is.setBuffer(rep->sBuffer);
+            tars::Int32 _ret;
+            _is.read(_ret, 0, true);
+            return _ret;
+        }
+
+        void async_test(BServantPrxCallbackPtr callback,const map<string, string>& context = TARS_CONTEXT())
+        {
+            tars::TarsOutputStream<tars::BufferWriterVector> _os;
+            std::map<string, string> _mStatus;
+            tars_invoke_async(tars::TARSNORMAL,"test", _os, context, _mStatus, callback);
+        }
+        
+        void coro_test(BServantCoroPrxCallbackPtr callback,const map<string, string>& context = TARS_CONTEXT())
+        {
+            tars::TarsOutputStream<tars::BufferWriterVector> _os;
+            std::map<string, string> _mStatus;
+            tars_invoke_async(tars::TARSNORMAL,"test", _os, context, _mStatus, callback);
+        }
+
+        tars::Int32 testCoroParallel(const std::string & sIn,std::string &sOut,const map<string, string> &context = TARS_CONTEXT(),map<string, string> * pResponseContext = NULL)
+        {
+            tars::TarsOutputStream<tars::BufferWriterVector> _os;
+            _os.write(sIn, 1);
+            _os.write(sOut, 2);
+            std::map<string, string> _mStatus;
+            shared_ptr<tars::ResponsePacket> rep = tars_invoke(tars::TARSNORMAL,"testCoroParallel", _os, context, _mStatus);
+            if(pResponseContext)
+            {
+                pResponseContext->swap(rep->context);
+            }
+
+            tars::TarsInputStream<tars::BufferReader> _is;
+            _is.setBuffer(rep->sBuffer);
+            tars::Int32 _ret;
+            _is.read(_ret, 0, true);
+            _is.read(sOut, 2, true);
+            return _ret;
+        }
+
+        void async_testCoroParallel(BServantPrxCallbackPtr callback,const std::string &sIn,const map<string, string>& context = TARS_CONTEXT())
+        {
+            tars::TarsOutputStream<tars::BufferWriterVector> _os;
+            _os.write(sIn, 1);
+            std::map<string, string> _mStatus;
+            tars_invoke_async(tars::TARSNORMAL,"testCoroParallel", _os, context, _mStatus, callback);
+        }
+        
+        void coro_testCoroParallel(BServantCoroPrxCallbackPtr callback,const std::string &sIn,const map<string, string>& context = TARS_CONTEXT())
+        {
+            tars::TarsOutputStream<tars::BufferWriterVector> _os;
+            _os.write(sIn, 1);
+            std::map<string, string> _mStatus;
+            tars_invoke_async(tars::TARSNORMAL,"testCoroParallel", _os, context, _mStatus, callback);
+        }
+
+        tars::Int32 testCoroSerial(const std::string & sIn,std::string &sOut,const map<string, string> &context = TARS_CONTEXT(),map<string, string> * pResponseContext = NULL)
+        {
+            tars::TarsOutputStream<tars::BufferWriterVector> _os;
+            _os.write(sIn, 1);
+            _os.write(sOut, 2);
+            std::map<string, string> _mStatus;
+            shared_ptr<tars::ResponsePacket> rep = tars_invoke(tars::TARSNORMAL,"testCoroSerial", _os, context, _mStatus);
+            if(pResponseContext)
+            {
+                pResponseContext->swap(rep->context);
+            }
+
+            tars::TarsInputStream<tars::BufferReader> _is;
+            _is.setBuffer(rep->sBuffer);
+            tars::Int32 _ret;
+            _is.read(_ret, 0, true);
+            _is.read(sOut, 2, true);
+            return _ret;
+        }
+
+        void async_testCoroSerial(BServantPrxCallbackPtr callback,const std::string &sIn,const map<string, string>& context = TARS_CONTEXT())
+        {
+            tars::TarsOutputStream<tars::BufferWriterVector> _os;
+            _os.write(sIn, 1);
+            std::map<string, string> _mStatus;
+            tars_invoke_async(tars::TARSNORMAL,"testCoroSerial", _os, context, _mStatus, callback);
+        }
+        
+        void coro_testCoroSerial(BServantCoroPrxCallbackPtr callback,const std::string &sIn,const map<string, string>& context = TARS_CONTEXT())
+        {
+            tars::TarsOutputStream<tars::BufferWriterVector> _os;
+            _os.write(sIn, 1);
+            std::map<string, string> _mStatus;
+            tars_invoke_async(tars::TARSNORMAL,"testCoroSerial", _os, context, _mStatus, callback);
+        }
+
+        BServantProxy* tars_hash(int64_t key)
+        {
+            return (BServantProxy*)ServantProxy::tars_hash(key);
+        }
+
+        BServantProxy* tars_consistent_hash(int64_t key)
+        {
+            return (BServantProxy*)ServantProxy::tars_consistent_hash(key);
+        }
+
+        BServantProxy* tars_set_timeout(int msecond)
+        {
+            return (BServantProxy*)ServantProxy::tars_set_timeout(msecond);
+        }
+
+        static const char* tars_prxname() { return "BServantProxy"; }
+    };
+    typedef tars::TC_AutoPtr<BServantProxy> BServantPrx;
+
+    /* servant for server */
+    class BServant : public tars::Servant
+    {
+    public:
+        virtual ~BServant(){}
+        virtual tars::Int32 test(tars::TarsCurrentPtr current) = 0;
+        static void async_response_test(tars::TarsCurrentPtr current, tars::Int32 _ret)
+        {
+            if (current->getRequestVersion() == TUPVERSION )
+            {
+                UniAttribute<tars::BufferWriterVector, tars::BufferReader>  tarsAttr;
+                tarsAttr.setVersion(current->getRequestVersion());
+                tarsAttr.put("", _ret);
+
+                vector<char> sTupResponseBuffer;
+                tarsAttr.encode(sTupResponseBuffer);
+                current->sendResponse(tars::TARSSERVERSUCCESS, sTupResponseBuffer);
+            }
+            else
+            {
+                tars::TarsOutputStream<tars::BufferWriterVector> _os;
+                _os.write(_ret, 0);
+
+                current->sendResponse(tars::TARSSERVERSUCCESS, _os.getByteBuffer());
+            }
+        }
+
+        virtual tars::Int32 testCoroParallel(const std::string & sIn,std::string &sOut,tars::TarsCurrentPtr current) = 0;
+        static void async_response_testCoroParallel(tars::TarsCurrentPtr current, tars::Int32 _ret, const std::string &sOut)
+        {
+            if (current->getRequestVersion() == TUPVERSION )
+            {
+                UniAttribute<tars::BufferWriterVector, tars::BufferReader>  tarsAttr;
+                tarsAttr.setVersion(current->getRequestVersion());
+                tarsAttr.put("", _ret);
+                tarsAttr.put("sOut", sOut);
+
+                vector<char> sTupResponseBuffer;
+                tarsAttr.encode(sTupResponseBuffer);
+                current->sendResponse(tars::TARSSERVERSUCCESS, sTupResponseBuffer);
+            }
+            else
+            {
+                tars::TarsOutputStream<tars::BufferWriterVector> _os;
+                _os.write(_ret, 0);
+
+                _os.write(sOut, 2);
+
+                current->sendResponse(tars::TARSSERVERSUCCESS, _os.getByteBuffer());
+            }
+        }
+
+        virtual tars::Int32 testCoroSerial(const std::string & sIn,std::string &sOut,tars::TarsCurrentPtr current) = 0;
+        static void async_response_testCoroSerial(tars::TarsCurrentPtr current, tars::Int32 _ret, const std::string &sOut)
+        {
+            if (current->getRequestVersion() == TUPVERSION )
+            {
+                UniAttribute<tars::BufferWriterVector, tars::BufferReader>  tarsAttr;
+                tarsAttr.setVersion(current->getRequestVersion());
+                tarsAttr.put("", _ret);
+                tarsAttr.put("sOut", sOut);
+
+                vector<char> sTupResponseBuffer;
+                tarsAttr.encode(sTupResponseBuffer);
+                current->sendResponse(tars::TARSSERVERSUCCESS, sTupResponseBuffer);
+            }
+            else
+            {
+                tars::TarsOutputStream<tars::BufferWriterVector> _os;
+                _os.write(_ret, 0);
+
+                _os.write(sOut, 2);
+
+                current->sendResponse(tars::TARSSERVERSUCCESS, _os.getByteBuffer());
+            }
+        }
+
+    public:
+        int onDispatch(tars::TarsCurrentPtr _current, vector<char> &_sResponseBuffer)
+        {
+            static ::std::string __Test__BServant_all[]=
+            {
+                "test",
+                "testCoroParallel",
+                "testCoroSerial"
+            };
+
+            pair<string*, string*> r = equal_range(__Test__BServant_all, __Test__BServant_all+3, _current->getFuncName());
+            if(r.first == r.second) return tars::TARSSERVERNOFUNCERR;
+            switch(r.first - __Test__BServant_all)
+            {
+                case 0:
+                {
+                    tars::TarsInputStream<tars::BufferReader> _is;
+                    _is.setBuffer(_current->getRequestBuffer());
+                    if (_current->getRequestVersion() == TUPVERSION)
+                    {
+                        UniAttribute<tars::BufferWriterVector, tars::BufferReader>  tarsAttr;
+                        tarsAttr.setVersion(_current->getRequestVersion());
+                        tarsAttr.decode(_current->getRequestBuffer());
+                    }
+                    else
+                    {
+                    }
+                    tars::Int32 _ret = test(_current);
+                    if(_current->isResponse())
+                    {
+                        if (_current->getRequestVersion() == TUPVERSION )
+                        {
+                            UniAttribute<tars::BufferWriterVector, tars::BufferReader>  tarsAttr;
+                            tarsAttr.setVersion(_current->getRequestVersion());
+                            tarsAttr.put("", _ret);
+                            tarsAttr.encode(_sResponseBuffer);
+                        }
+                        else
+                        {
+                            tars::TarsOutputStream<tars::BufferWriterVector> _os;
+                            _os.write(_ret, 0);
+                            _os.swap(_sResponseBuffer);
+                        }
+                    }
+                    return tars::TARSSERVERSUCCESS;
+
+                }
+                case 1:
+                {
+                    tars::TarsInputStream<tars::BufferReader> _is;
+                    _is.setBuffer(_current->getRequestBuffer());
+                    std::string sIn;
+                    std::string sOut;
+                    if (_current->getRequestVersion() == TUPVERSION)
+                    {
+                        UniAttribute<tars::BufferWriterVector, tars::BufferReader>  tarsAttr;
+                        tarsAttr.setVersion(_current->getRequestVersion());
+                        tarsAttr.decode(_current->getRequestBuffer());
+                        tarsAttr.get("sIn", sIn);
+                        tarsAttr.getByDefault("sOut", sOut, sOut);
+                    }
+                    else
+                    {
+                        _is.read(sIn, 1, true);
+                        _is.read(sOut, 2, false);
+                    }
+                    tars::Int32 _ret = testCoroParallel(sIn,sOut, _current);
+                    if(_current->isResponse())
+                    {
+                        if (_current->getRequestVersion() == TUPVERSION )
+                        {
+                            UniAttribute<tars::BufferWriterVector, tars::BufferReader>  tarsAttr;
+                            tarsAttr.setVersion(_current->getRequestVersion());
+                            tarsAttr.put("", _ret);
+                            tarsAttr.put("sOut", sOut);
+                            tarsAttr.encode(_sResponseBuffer);
+                        }
+                        else
+                        {
+                            tars::TarsOutputStream<tars::BufferWriterVector> _os;
+                            _os.write(_ret, 0);
+                            _os.write(sOut, 2);
+                            _os.swap(_sResponseBuffer);
+                        }
+                    }
+                    return tars::TARSSERVERSUCCESS;
+
+                }
+                case 2:
+                {
+                    tars::TarsInputStream<tars::BufferReader> _is;
+                    _is.setBuffer(_current->getRequestBuffer());
+                    std::string sIn;
+                    std::string sOut;
+                    if (_current->getRequestVersion() == TUPVERSION)
+                    {
+                        UniAttribute<tars::BufferWriterVector, tars::BufferReader>  tarsAttr;
+                        tarsAttr.setVersion(_current->getRequestVersion());
+                        tarsAttr.decode(_current->getRequestBuffer());
+                        tarsAttr.get("sIn", sIn);
+                        tarsAttr.getByDefault("sOut", sOut, sOut);
+                    }
+                    else
+                    {
+                        _is.read(sIn, 1, true);
+                        _is.read(sOut, 2, false);
+                    }
+                    tars::Int32 _ret = testCoroSerial(sIn,sOut, _current);
+                    if(_current->isResponse())
+                    {
+                        if (_current->getRequestVersion() == TUPVERSION )
+                        {
+                            UniAttribute<tars::BufferWriterVector, tars::BufferReader>  tarsAttr;
+                            tarsAttr.setVersion(_current->getRequestVersion());
+                            tarsAttr.put("", _ret);
+                            tarsAttr.put("sOut", sOut);
+                            tarsAttr.encode(_sResponseBuffer);
+                        }
+                        else
+                        {
+                            tars::TarsOutputStream<tars::BufferWriterVector> _os;
+                            _os.write(_ret, 0);
+                            _os.write(sOut, 2);
+                            _os.swap(_sResponseBuffer);
+                        }
+                    }
+                    return tars::TARSSERVERSUCCESS;
+
+                }
+            }
+            return tars::TARSSERVERNOFUNCERR;
+        }
+    };
+
+
+}
+
+
+
+#endif
diff --git a/examples/CoroutineDemo/client/BServant.h b/examples/CoroutineDemo/client/BServant.h
new file mode 100644
index 0000000..b3092d6
--- /dev/null
+++ b/examples/CoroutineDemo/client/BServant.h
@@ -0,0 +1,648 @@
+// **********************************************************************
+// This file was generated by a TARS parser!
+// TARS version 1.4.0.
+// **********************************************************************
+
+#ifndef __BSERVANT_H_
+#define __BSERVANT_H_
+
+#include <map>
+#include <string>
+#include <vector>
+#include "tup/Tars.h"
+#include "tup/TarsJson.h"
+using namespace std;
+#include "servant/ServantProxy.h"
+#include "servant/Servant.h"
+
+
+namespace Test
+{
+
+    /* callback of async proxy for client */
+    class BServantPrxCallback: public tars::ServantProxyCallback
+    {
+    public:
+        virtual ~BServantPrxCallback(){}
+        virtual void callback_test(tars::Int32 ret)
+        { throw std::runtime_error("callback_test() override incorrect."); }
+        virtual void callback_test_exception(tars::Int32 ret)
+        { throw std::runtime_error("callback_test_exception() override incorrect."); }
+
+        virtual void callback_testCoroParallel(tars::Int32 ret,  const std::string& sOut)
+        { throw std::runtime_error("callback_testCoroParallel() override incorrect."); }
+        virtual void callback_testCoroParallel_exception(tars::Int32 ret)
+        { throw std::runtime_error("callback_testCoroParallel_exception() override incorrect."); }
+
+        virtual void callback_testCoroSerial(tars::Int32 ret,  const std::string& sOut)
+        { throw std::runtime_error("callback_testCoroSerial() override incorrect."); }
+        virtual void callback_testCoroSerial_exception(tars::Int32 ret)
+        { throw std::runtime_error("callback_testCoroSerial_exception() override incorrect."); }
+
+    public:
+        virtual const map<std::string, std::string> & getResponseContext() const
+        {
+            CallbackThreadData * pCbtd = CallbackThreadData::getData();
+            assert(pCbtd != NULL);
+
+            if(!pCbtd->getContextValid())
+            {
+                throw TC_Exception("cann't get response context");
+            }
+            return pCbtd->getResponseContext();
+        }
+
+    public:
+        virtual int onDispatch(tars::ReqMessagePtr msg)
+        {
+            static ::std::string __BServant_all[]=
+            {
+                "test",
+                "testCoroParallel",
+                "testCoroSerial"
+            };
+            pair<string*, string*> r = equal_range(__BServant_all, __BServant_all+3, string(msg->request.sFuncName));
+            if(r.first == r.second) return tars::TARSSERVERNOFUNCERR;
+            switch(r.first - __BServant_all)
+            {
+                case 0:
+                {
+                    if (msg->response->iRet != tars::TARSSERVERSUCCESS)
+                    {
+                        callback_test_exception(msg->response->iRet);
+
+                        return msg->response->iRet;
+                    }
+                    tars::TarsInputStream<tars::BufferReader> _is;
+
+                    _is.setBuffer(msg->response->sBuffer);
+                    tars::Int32 _ret;
+                    _is.read(_ret, 0, true);
+
+                    CallbackThreadData * pCbtd = CallbackThreadData::getData();
+                    assert(pCbtd != NULL);
+
+                    pCbtd->setResponseContext(msg->response->context);
+
+                    callback_test(_ret);
+
+                    pCbtd->delResponseContext();
+
+                    return tars::TARSSERVERSUCCESS;
+
+                }
+                case 1:
+                {
+                    if (msg->response->iRet != tars::TARSSERVERSUCCESS)
+                    {
+                        callback_testCoroParallel_exception(msg->response->iRet);
+
+                        return msg->response->iRet;
+                    }
+                    tars::TarsInputStream<tars::BufferReader> _is;
+
+                    _is.setBuffer(msg->response->sBuffer);
+                    tars::Int32 _ret;
+                    _is.read(_ret, 0, true);
+
+                    std::string sOut;
+                    _is.read(sOut, 2, true);
+                    CallbackThreadData * pCbtd = CallbackThreadData::getData();
+                    assert(pCbtd != NULL);
+
+                    pCbtd->setResponseContext(msg->response->context);
+
+                    callback_testCoroParallel(_ret, sOut);
+
+                    pCbtd->delResponseContext();
+
+                    return tars::TARSSERVERSUCCESS;
+
+                }
+                case 2:
+                {
+                    if (msg->response->iRet != tars::TARSSERVERSUCCESS)
+                    {
+                        callback_testCoroSerial_exception(msg->response->iRet);
+
+                        return msg->response->iRet;
+                    }
+                    tars::TarsInputStream<tars::BufferReader> _is;
+
+                    _is.setBuffer(msg->response->sBuffer);
+                    tars::Int32 _ret;
+                    _is.read(_ret, 0, true);
+
+                    std::string sOut;
+                    _is.read(sOut, 2, true);
+                    CallbackThreadData * pCbtd = CallbackThreadData::getData();
+                    assert(pCbtd != NULL);
+
+                    pCbtd->setResponseContext(msg->response->context);
+
+                    callback_testCoroSerial(_ret, sOut);
+
+                    pCbtd->delResponseContext();
+
+                    return tars::TARSSERVERSUCCESS;
+
+                }
+            }
+            return tars::TARSSERVERNOFUNCERR;
+        }
+
+    };
+    typedef tars::TC_AutoPtr<BServantPrxCallback> BServantPrxCallbackPtr;
+
+    /* callback of coroutine async proxy for client */
+    class BServantCoroPrxCallback: public BServantPrxCallback
+    {
+    public:
+        virtual ~BServantCoroPrxCallback(){}
+    public:
+        virtual const map<std::string, std::string> & getResponseContext() const { return _mRspContext; }
+
+        virtual void setResponseContext(const map<std::string, std::string> &mContext) { _mRspContext = mContext; }
+
+    public:
+        int onDispatch(tars::ReqMessagePtr msg)
+        {
+            static ::std::string __BServant_all[]=
+            {
+                "test",
+                "testCoroParallel",
+                "testCoroSerial"
+            };
+
+            pair<string*, string*> r = equal_range(__BServant_all, __BServant_all+3, string(msg->request.sFuncName));
+            if(r.first == r.second) return tars::TARSSERVERNOFUNCERR;
+            switch(r.first - __BServant_all)
+            {
+                case 0:
+                {
+                    if (msg->response->iRet != tars::TARSSERVERSUCCESS)
+                    {
+                        callback_test_exception(msg->response->iRet);
+
+                        return msg->response->iRet;
+                    }
+                    tars::TarsInputStream<tars::BufferReader> _is;
+
+                    _is.setBuffer(msg->response->sBuffer);
+                    try
+                    {
+                        tars::Int32 _ret;
+                        _is.read(_ret, 0, true);
+
+                        setResponseContext(msg->response->context);
+
+                        callback_test(_ret);
+
+                    }
+                    catch(std::exception &ex)
+                    {
+                        callback_test_exception(tars::TARSCLIENTDECODEERR);
+
+                        return tars::TARSCLIENTDECODEERR;
+                    }
+                    catch(...)
+                    {
+                        callback_test_exception(tars::TARSCLIENTDECODEERR);
+
+                        return tars::TARSCLIENTDECODEERR;
+                    }
+
+                    return tars::TARSSERVERSUCCESS;
+
+                }
+                case 1:
+                {
+                    if (msg->response->iRet != tars::TARSSERVERSUCCESS)
+                    {
+                        callback_testCoroParallel_exception(msg->response->iRet);
+
+                        return msg->response->iRet;
+                    }
+                    tars::TarsInputStream<tars::BufferReader> _is;
+
+                    _is.setBuffer(msg->response->sBuffer);
+                    try
+                    {
+                        tars::Int32 _ret;
+                        _is.read(_ret, 0, true);
+
+                        std::string sOut;
+                        _is.read(sOut, 2, true);
+                        setResponseContext(msg->response->context);
+
+                        callback_testCoroParallel(_ret, sOut);
+
+                    }
+                    catch(std::exception &ex)
+                    {
+                        callback_testCoroParallel_exception(tars::TARSCLIENTDECODEERR);
+
+                        return tars::TARSCLIENTDECODEERR;
+                    }
+                    catch(...)
+                    {
+                        callback_testCoroParallel_exception(tars::TARSCLIENTDECODEERR);
+
+                        return tars::TARSCLIENTDECODEERR;
+                    }
+
+                    return tars::TARSSERVERSUCCESS;
+
+                }
+                case 2:
+                {
+                    if (msg->response->iRet != tars::TARSSERVERSUCCESS)
+                    {
+                        callback_testCoroSerial_exception(msg->response->iRet);
+
+                        return msg->response->iRet;
+                    }
+                    tars::TarsInputStream<tars::BufferReader> _is;
+
+                    _is.setBuffer(msg->response->sBuffer);
+                    try
+                    {
+                        tars::Int32 _ret;
+                        _is.read(_ret, 0, true);
+
+                        std::string sOut;
+                        _is.read(sOut, 2, true);
+                        setResponseContext(msg->response->context);
+
+                        callback_testCoroSerial(_ret, sOut);
+
+                    }
+                    catch(std::exception &ex)
+                    {
+                        callback_testCoroSerial_exception(tars::TARSCLIENTDECODEERR);
+
+                        return tars::TARSCLIENTDECODEERR;
+                    }
+                    catch(...)
+                    {
+                        callback_testCoroSerial_exception(tars::TARSCLIENTDECODEERR);
+
+                        return tars::TARSCLIENTDECODEERR;
+                    }
+
+                    return tars::TARSSERVERSUCCESS;
+
+                }
+            }
+            return tars::TARSSERVERNOFUNCERR;
+        }
+
+    protected:
+        map<std::string, std::string> _mRspContext;
+    };
+    typedef tars::TC_AutoPtr<BServantCoroPrxCallback> BServantCoroPrxCallbackPtr;
+
+    /* proxy for client */
+    class BServantProxy : public tars::ServantProxy
+    {
+    public:
+        typedef map<string, string> TARS_CONTEXT;
+        tars::Int32 test(const map<string, string> &context = TARS_CONTEXT(),map<string, string> * pResponseContext = NULL)
+        {
+            tars::TarsOutputStream<tars::BufferWriterVector> _os;
+            std::map<string, string> _mStatus;
+            shared_ptr<tars::ResponsePacket> rep = tars_invoke(tars::TARSNORMAL,"test", _os, context, _mStatus);
+            if(pResponseContext)
+            {
+                pResponseContext->swap(rep->context);
+            }
+
+            tars::TarsInputStream<tars::BufferReader> _is;
+            _is.setBuffer(rep->sBuffer);
+            tars::Int32 _ret;
+            _is.read(_ret, 0, true);
+            return _ret;
+        }
+
+        void async_test(BServantPrxCallbackPtr callback,const map<string, string>& context = TARS_CONTEXT())
+        {
+            tars::TarsOutputStream<tars::BufferWriterVector> _os;
+            std::map<string, string> _mStatus;
+            tars_invoke_async(tars::TARSNORMAL,"test", _os, context, _mStatus, callback);
+        }
+        
+        void coro_test(BServantCoroPrxCallbackPtr callback,const map<string, string>& context = TARS_CONTEXT())
+        {
+            tars::TarsOutputStream<tars::BufferWriterVector> _os;
+            std::map<string, string> _mStatus;
+            tars_invoke_async(tars::TARSNORMAL,"test", _os, context, _mStatus, callback);
+        }
+
+        tars::Int32 testCoroParallel(const std::string & sIn,std::string &sOut,const map<string, string> &context = TARS_CONTEXT(),map<string, string> * pResponseContext = NULL)
+        {
+            tars::TarsOutputStream<tars::BufferWriterVector> _os;
+            _os.write(sIn, 1);
+            _os.write(sOut, 2);
+            std::map<string, string> _mStatus;
+            shared_ptr<tars::ResponsePacket> rep = tars_invoke(tars::TARSNORMAL,"testCoroParallel", _os, context, _mStatus);
+            if(pResponseContext)
+            {
+                pResponseContext->swap(rep->context);
+            }
+
+            tars::TarsInputStream<tars::BufferReader> _is;
+            _is.setBuffer(rep->sBuffer);
+            tars::Int32 _ret;
+            _is.read(_ret, 0, true);
+            _is.read(sOut, 2, true);
+            return _ret;
+        }
+
+        void async_testCoroParallel(BServantPrxCallbackPtr callback,const std::string &sIn,const map<string, string>& context = TARS_CONTEXT())
+        {
+            tars::TarsOutputStream<tars::BufferWriterVector> _os;
+            _os.write(sIn, 1);
+            std::map<string, string> _mStatus;
+            tars_invoke_async(tars::TARSNORMAL,"testCoroParallel", _os, context, _mStatus, callback);
+        }
+        
+        void coro_testCoroParallel(BServantCoroPrxCallbackPtr callback,const std::string &sIn,const map<string, string>& context = TARS_CONTEXT())
+        {
+            tars::TarsOutputStream<tars::BufferWriterVector> _os;
+            _os.write(sIn, 1);
+            std::map<string, string> _mStatus;
+            tars_invoke_async(tars::TARSNORMAL,"testCoroParallel", _os, context, _mStatus, callback);
+        }
+
+        tars::Int32 testCoroSerial(const std::string & sIn,std::string &sOut,const map<string, string> &context = TARS_CONTEXT(),map<string, string> * pResponseContext = NULL)
+        {
+            tars::TarsOutputStream<tars::BufferWriterVector> _os;
+            _os.write(sIn, 1);
+            _os.write(sOut, 2);
+            std::map<string, string> _mStatus;
+            shared_ptr<tars::ResponsePacket> rep = tars_invoke(tars::TARSNORMAL,"testCoroSerial", _os, context, _mStatus);
+            if(pResponseContext)
+            {
+                pResponseContext->swap(rep->context);
+            }
+
+            tars::TarsInputStream<tars::BufferReader> _is;
+            _is.setBuffer(rep->sBuffer);
+            tars::Int32 _ret;
+            _is.read(_ret, 0, true);
+            _is.read(sOut, 2, true);
+            return _ret;
+        }
+
+        void async_testCoroSerial(BServantPrxCallbackPtr callback,const std::string &sIn,const map<string, string>& context = TARS_CONTEXT())
+        {
+            tars::TarsOutputStream<tars::BufferWriterVector> _os;
+            _os.write(sIn, 1);
+            std::map<string, string> _mStatus;
+            tars_invoke_async(tars::TARSNORMAL,"testCoroSerial", _os, context, _mStatus, callback);
+        }
+        
+        void coro_testCoroSerial(BServantCoroPrxCallbackPtr callback,const std::string &sIn,const map<string, string>& context = TARS_CONTEXT())
+        {
+            tars::TarsOutputStream<tars::BufferWriterVector> _os;
+            _os.write(sIn, 1);
+            std::map<string, string> _mStatus;
+            tars_invoke_async(tars::TARSNORMAL,"testCoroSerial", _os, context, _mStatus, callback);
+        }
+
+        BServantProxy* tars_hash(int64_t key)
+        {
+            return (BServantProxy*)ServantProxy::tars_hash(key);
+        }
+
+        BServantProxy* tars_consistent_hash(int64_t key)
+        {
+            return (BServantProxy*)ServantProxy::tars_consistent_hash(key);
+        }
+
+        BServantProxy* tars_set_timeout(int msecond)
+        {
+            return (BServantProxy*)ServantProxy::tars_set_timeout(msecond);
+        }
+
+        static const char* tars_prxname() { return "BServantProxy"; }
+    };
+    typedef tars::TC_AutoPtr<BServantProxy> BServantPrx;
+
+    /* servant for server */
+    class BServant : public tars::Servant
+    {
+    public:
+        virtual ~BServant(){}
+        virtual tars::Int32 test(tars::TarsCurrentPtr current) = 0;
+        static void async_response_test(tars::TarsCurrentPtr current, tars::Int32 _ret)
+        {
+            if (current->getRequestVersion() == TUPVERSION )
+            {
+                UniAttribute<tars::BufferWriterVector, tars::BufferReader>  tarsAttr;
+                tarsAttr.setVersion(current->getRequestVersion());
+                tarsAttr.put("", _ret);
+
+                vector<char> sTupResponseBuffer;
+                tarsAttr.encode(sTupResponseBuffer);
+                current->sendResponse(tars::TARSSERVERSUCCESS, sTupResponseBuffer);
+            }
+            else
+            {
+                tars::TarsOutputStream<tars::BufferWriterVector> _os;
+                _os.write(_ret, 0);
+
+                current->sendResponse(tars::TARSSERVERSUCCESS, _os.getByteBuffer());
+            }
+        }
+
+        virtual tars::Int32 testCoroParallel(const std::string & sIn,std::string &sOut,tars::TarsCurrentPtr current) = 0;
+        static void async_response_testCoroParallel(tars::TarsCurrentPtr current, tars::Int32 _ret, const std::string &sOut)
+        {
+            if (current->getRequestVersion() == TUPVERSION )
+            {
+                UniAttribute<tars::BufferWriterVector, tars::BufferReader>  tarsAttr;
+                tarsAttr.setVersion(current->getRequestVersion());
+                tarsAttr.put("", _ret);
+                tarsAttr.put("sOut", sOut);
+
+                vector<char> sTupResponseBuffer;
+                tarsAttr.encode(sTupResponseBuffer);
+                current->sendResponse(tars::TARSSERVERSUCCESS, sTupResponseBuffer);
+            }
+            else
+            {
+                tars::TarsOutputStream<tars::BufferWriterVector> _os;
+                _os.write(_ret, 0);
+
+                _os.write(sOut, 2);
+
+                current->sendResponse(tars::TARSSERVERSUCCESS, _os.getByteBuffer());
+            }
+        }
+
+        virtual tars::Int32 testCoroSerial(const std::string & sIn,std::string &sOut,tars::TarsCurrentPtr current) = 0;
+        static void async_response_testCoroSerial(tars::TarsCurrentPtr current, tars::Int32 _ret, const std::string &sOut)
+        {
+            if (current->getRequestVersion() == TUPVERSION )
+            {
+                UniAttribute<tars::BufferWriterVector, tars::BufferReader>  tarsAttr;
+                tarsAttr.setVersion(current->getRequestVersion());
+                tarsAttr.put("", _ret);
+                tarsAttr.put("sOut", sOut);
+
+                vector<char> sTupResponseBuffer;
+                tarsAttr.encode(sTupResponseBuffer);
+                current->sendResponse(tars::TARSSERVERSUCCESS, sTupResponseBuffer);
+            }
+            else
+            {
+                tars::TarsOutputStream<tars::BufferWriterVector> _os;
+                _os.write(_ret, 0);
+
+                _os.write(sOut, 2);
+
+                current->sendResponse(tars::TARSSERVERSUCCESS, _os.getByteBuffer());
+            }
+        }
+
+    public:
+        int onDispatch(tars::TarsCurrentPtr _current, vector<char> &_sResponseBuffer)
+        {
+            static ::std::string __Test__BServant_all[]=
+            {
+                "test",
+                "testCoroParallel",
+                "testCoroSerial"
+            };
+
+            pair<string*, string*> r = equal_range(__Test__BServant_all, __Test__BServant_all+3, _current->getFuncName());
+            if(r.first == r.second) return tars::TARSSERVERNOFUNCERR;
+            switch(r.first - __Test__BServant_all)
+            {
+                case 0:
+                {
+                    tars::TarsInputStream<tars::BufferReader> _is;
+                    _is.setBuffer(_current->getRequestBuffer());
+                    if (_current->getRequestVersion() == TUPVERSION)
+                    {
+                        UniAttribute<tars::BufferWriterVector, tars::BufferReader>  tarsAttr;
+                        tarsAttr.setVersion(_current->getRequestVersion());
+                        tarsAttr.decode(_current->getRequestBuffer());
+                    }
+                    else
+                    {
+                    }
+                    tars::Int32 _ret = test(_current);
+                    if(_current->isResponse())
+                    {
+                        if (_current->getRequestVersion() == TUPVERSION )
+                        {
+                            UniAttribute<tars::BufferWriterVector, tars::BufferReader>  tarsAttr;
+                            tarsAttr.setVersion(_current->getRequestVersion());
+                            tarsAttr.put("", _ret);
+                            tarsAttr.encode(_sResponseBuffer);
+                        }
+                        else
+                        {
+                            tars::TarsOutputStream<tars::BufferWriterVector> _os;
+                            _os.write(_ret, 0);
+                            _os.swap(_sResponseBuffer);
+                        }
+                    }
+                    return tars::TARSSERVERSUCCESS;
+
+                }
+                case 1:
+                {
+                    tars::TarsInputStream<tars::BufferReader> _is;
+                    _is.setBuffer(_current->getRequestBuffer());
+                    std::string sIn;
+                    std::string sOut;
+                    if (_current->getRequestVersion() == TUPVERSION)
+                    {
+                        UniAttribute<tars::BufferWriterVector, tars::BufferReader>  tarsAttr;
+                        tarsAttr.setVersion(_current->getRequestVersion());
+                        tarsAttr.decode(_current->getRequestBuffer());
+                        tarsAttr.get("sIn", sIn);
+                        tarsAttr.getByDefault("sOut", sOut, sOut);
+                    }
+                    else
+                    {
+                        _is.read(sIn, 1, true);
+                        _is.read(sOut, 2, false);
+                    }
+                    tars::Int32 _ret = testCoroParallel(sIn,sOut, _current);
+                    if(_current->isResponse())
+                    {
+                        if (_current->getRequestVersion() == TUPVERSION )
+                        {
+                            UniAttribute<tars::BufferWriterVector, tars::BufferReader>  tarsAttr;
+                            tarsAttr.setVersion(_current->getRequestVersion());
+                            tarsAttr.put("", _ret);
+                            tarsAttr.put("sOut", sOut);
+                            tarsAttr.encode(_sResponseBuffer);
+                        }
+                        else
+                        {
+                            tars::TarsOutputStream<tars::BufferWriterVector> _os;
+                            _os.write(_ret, 0);
+                            _os.write(sOut, 2);
+                            _os.swap(_sResponseBuffer);
+                        }
+                    }
+                    return tars::TARSSERVERSUCCESS;
+
+                }
+                case 2:
+                {
+                    tars::TarsInputStream<tars::BufferReader> _is;
+                    _is.setBuffer(_current->getRequestBuffer());
+                    std::string sIn;
+                    std::string sOut;
+                    if (_current->getRequestVersion() == TUPVERSION)
+                    {
+                        UniAttribute<tars::BufferWriterVector, tars::BufferReader>  tarsAttr;
+                        tarsAttr.setVersion(_current->getRequestVersion());
+                        tarsAttr.decode(_current->getRequestBuffer());
+                        tarsAttr.get("sIn", sIn);
+                        tarsAttr.getByDefault("sOut", sOut, sOut);
+                    }
+                    else
+                    {
+                        _is.read(sIn, 1, true);
+                        _is.read(sOut, 2, false);
+                    }
+                    tars::Int32 _ret = testCoroSerial(sIn,sOut, _current);
+                    if(_current->isResponse())
+                    {
+                        if (_current->getRequestVersion() == TUPVERSION )
+                        {
+                            UniAttribute<tars::BufferWriterVector, tars::BufferReader>  tarsAttr;
+                            tarsAttr.setVersion(_current->getRequestVersion());
+                            tarsAttr.put("", _ret);
+                            tarsAttr.put("sOut", sOut);
+                            tarsAttr.encode(_sResponseBuffer);
+                        }
+                        else
+                        {
+                            tars::TarsOutputStream<tars::BufferWriterVector> _os;
+                            _os.write(_ret, 0);
+                            _os.write(sOut, 2);
+                            _os.swap(_sResponseBuffer);
+                        }
+                    }
+                    return tars::TARSSERVERSUCCESS;
+
+                }
+            }
+            return tars::TARSSERVERNOFUNCERR;
+        }
+    };
+
+
+}
+
+
+
+#endif
diff --git a/examples/CoroutineDemo/testCoro/BServant.h b/examples/CoroutineDemo/testCoro/BServant.h
new file mode 100644
index 0000000..b3092d6
--- /dev/null
+++ b/examples/CoroutineDemo/testCoro/BServant.h
@@ -0,0 +1,648 @@
+// **********************************************************************
+// This file was generated by a TARS parser!
+// TARS version 1.4.0.
+// **********************************************************************
+
+#ifndef __BSERVANT_H_
+#define __BSERVANT_H_
+
+#include <map>
+#include <string>
+#include <vector>
+#include "tup/Tars.h"
+#include "tup/TarsJson.h"
+using namespace std;
+#include "servant/ServantProxy.h"
+#include "servant/Servant.h"
+
+
+namespace Test
+{
+
+    /* callback of async proxy for client */
+    class BServantPrxCallback: public tars::ServantProxyCallback
+    {
+    public:
+        virtual ~BServantPrxCallback(){}
+        virtual void callback_test(tars::Int32 ret)
+        { throw std::runtime_error("callback_test() override incorrect."); }
+        virtual void callback_test_exception(tars::Int32 ret)
+        { throw std::runtime_error("callback_test_exception() override incorrect."); }
+
+        virtual void callback_testCoroParallel(tars::Int32 ret,  const std::string& sOut)
+        { throw std::runtime_error("callback_testCoroParallel() override incorrect."); }
+        virtual void callback_testCoroParallel_exception(tars::Int32 ret)
+        { throw std::runtime_error("callback_testCoroParallel_exception() override incorrect."); }
+
+        virtual void callback_testCoroSerial(tars::Int32 ret,  const std::string& sOut)
+        { throw std::runtime_error("callback_testCoroSerial() override incorrect."); }
+        virtual void callback_testCoroSerial_exception(tars::Int32 ret)
+        { throw std::runtime_error("callback_testCoroSerial_exception() override incorrect."); }
+
+    public:
+        virtual const map<std::string, std::string> & getResponseContext() const
+        {
+            CallbackThreadData * pCbtd = CallbackThreadData::getData();
+            assert(pCbtd != NULL);
+
+            if(!pCbtd->getContextValid())
+            {
+                throw TC_Exception("cann't get response context");
+            }
+            return pCbtd->getResponseContext();
+        }
+
+    public:
+        virtual int onDispatch(tars::ReqMessagePtr msg)
+        {
+            static ::std::string __BServant_all[]=
+            {
+                "test",
+                "testCoroParallel",
+                "testCoroSerial"
+            };
+            pair<string*, string*> r = equal_range(__BServant_all, __BServant_all+3, string(msg->request.sFuncName));
+            if(r.first == r.second) return tars::TARSSERVERNOFUNCERR;
+            switch(r.first - __BServant_all)
+            {
+                case 0:
+                {
+                    if (msg->response->iRet != tars::TARSSERVERSUCCESS)
+                    {
+                        callback_test_exception(msg->response->iRet);
+
+                        return msg->response->iRet;
+                    }
+                    tars::TarsInputStream<tars::BufferReader> _is;
+
+                    _is.setBuffer(msg->response->sBuffer);
+                    tars::Int32 _ret;
+                    _is.read(_ret, 0, true);
+
+                    CallbackThreadData * pCbtd = CallbackThreadData::getData();
+                    assert(pCbtd != NULL);
+
+                    pCbtd->setResponseContext(msg->response->context);
+
+                    callback_test(_ret);
+
+                    pCbtd->delResponseContext();
+
+                    return tars::TARSSERVERSUCCESS;
+
+                }
+                case 1:
+                {
+                    if (msg->response->iRet != tars::TARSSERVERSUCCESS)
+                    {
+                        callback_testCoroParallel_exception(msg->response->iRet);
+
+                        return msg->response->iRet;
+                    }
+                    tars::TarsInputStream<tars::BufferReader> _is;
+
+                    _is.setBuffer(msg->response->sBuffer);
+                    tars::Int32 _ret;
+                    _is.read(_ret, 0, true);
+
+                    std::string sOut;
+                    _is.read(sOut, 2, true);
+                    CallbackThreadData * pCbtd = CallbackThreadData::getData();
+                    assert(pCbtd != NULL);
+
+                    pCbtd->setResponseContext(msg->response->context);
+
+                    callback_testCoroParallel(_ret, sOut);
+
+                    pCbtd->delResponseContext();
+
+                    return tars::TARSSERVERSUCCESS;
+
+                }
+                case 2:
+                {
+                    if (msg->response->iRet != tars::TARSSERVERSUCCESS)
+                    {
+                        callback_testCoroSerial_exception(msg->response->iRet);
+
+                        return msg->response->iRet;
+                    }
+                    tars::TarsInputStream<tars::BufferReader> _is;
+
+                    _is.setBuffer(msg->response->sBuffer);
+                    tars::Int32 _ret;
+                    _is.read(_ret, 0, true);
+
+                    std::string sOut;
+                    _is.read(sOut, 2, true);
+                    CallbackThreadData * pCbtd = CallbackThreadData::getData();
+                    assert(pCbtd != NULL);
+
+                    pCbtd->setResponseContext(msg->response->context);
+
+                    callback_testCoroSerial(_ret, sOut);
+
+                    pCbtd->delResponseContext();
+
+                    return tars::TARSSERVERSUCCESS;
+
+                }
+            }
+            return tars::TARSSERVERNOFUNCERR;
+        }
+
+    };
+    typedef tars::TC_AutoPtr<BServantPrxCallback> BServantPrxCallbackPtr;
+
+    /* callback of coroutine async proxy for client */
+    class BServantCoroPrxCallback: public BServantPrxCallback
+    {
+    public:
+        virtual ~BServantCoroPrxCallback(){}
+    public:
+        virtual const map<std::string, std::string> & getResponseContext() const { return _mRspContext; }
+
+        virtual void setResponseContext(const map<std::string, std::string> &mContext) { _mRspContext = mContext; }
+
+    public:
+        int onDispatch(tars::ReqMessagePtr msg)
+        {
+            static ::std::string __BServant_all[]=
+            {
+                "test",
+                "testCoroParallel",
+                "testCoroSerial"
+            };
+
+            pair<string*, string*> r = equal_range(__BServant_all, __BServant_all+3, string(msg->request.sFuncName));
+            if(r.first == r.second) return tars::TARSSERVERNOFUNCERR;
+            switch(r.first - __BServant_all)
+            {
+                case 0:
+                {
+                    if (msg->response->iRet != tars::TARSSERVERSUCCESS)
+                    {
+                        callback_test_exception(msg->response->iRet);
+
+                        return msg->response->iRet;
+                    }
+                    tars::TarsInputStream<tars::BufferReader> _is;
+
+                    _is.setBuffer(msg->response->sBuffer);
+                    try
+                    {
+                        tars::Int32 _ret;
+                        _is.read(_ret, 0, true);
+
+                        setResponseContext(msg->response->context);
+
+                        callback_test(_ret);
+
+                    }
+                    catch(std::exception &ex)
+                    {
+                        callback_test_exception(tars::TARSCLIENTDECODEERR);
+
+                        return tars::TARSCLIENTDECODEERR;
+                    }
+                    catch(...)
+                    {
+                        callback_test_exception(tars::TARSCLIENTDECODEERR);
+
+                        return tars::TARSCLIENTDECODEERR;
+                    }
+
+                    return tars::TARSSERVERSUCCESS;
+
+                }
+                case 1:
+                {
+                    if (msg->response->iRet != tars::TARSSERVERSUCCESS)
+                    {
+                        callback_testCoroParallel_exception(msg->response->iRet);
+
+                        return msg->response->iRet;
+                    }
+                    tars::TarsInputStream<tars::BufferReader> _is;
+
+                    _is.setBuffer(msg->response->sBuffer);
+                    try
+                    {
+                        tars::Int32 _ret;
+                        _is.read(_ret, 0, true);
+
+                        std::string sOut;
+                        _is.read(sOut, 2, true);
+                        setResponseContext(msg->response->context);
+
+                        callback_testCoroParallel(_ret, sOut);
+
+                    }
+                    catch(std::exception &ex)
+                    {
+                        callback_testCoroParallel_exception(tars::TARSCLIENTDECODEERR);
+
+                        return tars::TARSCLIENTDECODEERR;
+                    }
+                    catch(...)
+                    {
+                        callback_testCoroParallel_exception(tars::TARSCLIENTDECODEERR);
+
+                        return tars::TARSCLIENTDECODEERR;
+                    }
+
+                    return tars::TARSSERVERSUCCESS;
+
+                }
+                case 2:
+                {
+                    if (msg->response->iRet != tars::TARSSERVERSUCCESS)
+                    {
+                        callback_testCoroSerial_exception(msg->response->iRet);
+
+                        return msg->response->iRet;
+                    }
+                    tars::TarsInputStream<tars::BufferReader> _is;
+
+                    _is.setBuffer(msg->response->sBuffer);
+                    try
+                    {
+                        tars::Int32 _ret;
+                        _is.read(_ret, 0, true);
+
+                        std::string sOut;
+                        _is.read(sOut, 2, true);
+                        setResponseContext(msg->response->context);
+
+                        callback_testCoroSerial(_ret, sOut);
+
+                    }
+                    catch(std::exception &ex)
+                    {
+                        callback_testCoroSerial_exception(tars::TARSCLIENTDECODEERR);
+
+                        return tars::TARSCLIENTDECODEERR;
+                    }
+                    catch(...)
+                    {
+                        callback_testCoroSerial_exception(tars::TARSCLIENTDECODEERR);
+
+                        return tars::TARSCLIENTDECODEERR;
+                    }
+
+                    return tars::TARSSERVERSUCCESS;
+
+                }
+            }
+            return tars::TARSSERVERNOFUNCERR;
+        }
+
+    protected:
+        map<std::string, std::string> _mRspContext;
+    };
+    typedef tars::TC_AutoPtr<BServantCoroPrxCallback> BServantCoroPrxCallbackPtr;
+
+    /* proxy for client */
+    class BServantProxy : public tars::ServantProxy
+    {
+    public:
+        typedef map<string, string> TARS_CONTEXT;
+        tars::Int32 test(const map<string, string> &context = TARS_CONTEXT(),map<string, string> * pResponseContext = NULL)
+        {
+            tars::TarsOutputStream<tars::BufferWriterVector> _os;
+            std::map<string, string> _mStatus;
+            shared_ptr<tars::ResponsePacket> rep = tars_invoke(tars::TARSNORMAL,"test", _os, context, _mStatus);
+            if(pResponseContext)
+            {
+                pResponseContext->swap(rep->context);
+            }
+
+            tars::TarsInputStream<tars::BufferReader> _is;
+            _is.setBuffer(rep->sBuffer);
+            tars::Int32 _ret;
+            _is.read(_ret, 0, true);
+            return _ret;
+        }
+
+        void async_test(BServantPrxCallbackPtr callback,const map<string, string>& context = TARS_CONTEXT())
+        {
+            tars::TarsOutputStream<tars::BufferWriterVector> _os;
+            std::map<string, string> _mStatus;
+            tars_invoke_async(tars::TARSNORMAL,"test", _os, context, _mStatus, callback);
+        }
+        
+        void coro_test(BServantCoroPrxCallbackPtr callback,const map<string, string>& context = TARS_CONTEXT())
+        {
+            tars::TarsOutputStream<tars::BufferWriterVector> _os;
+            std::map<string, string> _mStatus;
+            tars_invoke_async(tars::TARSNORMAL,"test", _os, context, _mStatus, callback);
+        }
+
+        tars::Int32 testCoroParallel(const std::string & sIn,std::string &sOut,const map<string, string> &context = TARS_CONTEXT(),map<string, string> * pResponseContext = NULL)
+        {
+            tars::TarsOutputStream<tars::BufferWriterVector> _os;
+            _os.write(sIn, 1);
+            _os.write(sOut, 2);
+            std::map<string, string> _mStatus;
+            shared_ptr<tars::ResponsePacket> rep = tars_invoke(tars::TARSNORMAL,"testCoroParallel", _os, context, _mStatus);
+            if(pResponseContext)
+            {
+                pResponseContext->swap(rep->context);
+            }
+
+            tars::TarsInputStream<tars::BufferReader> _is;
+            _is.setBuffer(rep->sBuffer);
+            tars::Int32 _ret;
+            _is.read(_ret, 0, true);
+            _is.read(sOut, 2, true);
+            return _ret;
+        }
+
+        void async_testCoroParallel(BServantPrxCallbackPtr callback,const std::string &sIn,const map<string, string>& context = TARS_CONTEXT())
+        {
+            tars::TarsOutputStream<tars::BufferWriterVector> _os;
+            _os.write(sIn, 1);
+            std::map<string, string> _mStatus;
+            tars_invoke_async(tars::TARSNORMAL,"testCoroParallel", _os, context, _mStatus, callback);
+        }
+        
+        void coro_testCoroParallel(BServantCoroPrxCallbackPtr callback,const std::string &sIn,const map<string, string>& context = TARS_CONTEXT())
+        {
+            tars::TarsOutputStream<tars::BufferWriterVector> _os;
+            _os.write(sIn, 1);
+            std::map<string, string> _mStatus;
+            tars_invoke_async(tars::TARSNORMAL,"testCoroParallel", _os, context, _mStatus, callback);
+        }
+
+        tars::Int32 testCoroSerial(const std::string & sIn,std::string &sOut,const map<string, string> &context = TARS_CONTEXT(),map<string, string> * pResponseContext = NULL)
+        {
+            tars::TarsOutputStream<tars::BufferWriterVector> _os;
+            _os.write(sIn, 1);
+            _os.write(sOut, 2);
+            std::map<string, string> _mStatus;
+            shared_ptr<tars::ResponsePacket> rep = tars_invoke(tars::TARSNORMAL,"testCoroSerial", _os, context, _mStatus);
+            if(pResponseContext)
+            {
+                pResponseContext->swap(rep->context);
+            }
+
+            tars::TarsInputStream<tars::BufferReader> _is;
+            _is.setBuffer(rep->sBuffer);
+            tars::Int32 _ret;
+            _is.read(_ret, 0, true);
+            _is.read(sOut, 2, true);
+            return _ret;
+        }
+
+        void async_testCoroSerial(BServantPrxCallbackPtr callback,const std::string &sIn,const map<string, string>& context = TARS_CONTEXT())
+        {
+            tars::TarsOutputStream<tars::BufferWriterVector> _os;
+            _os.write(sIn, 1);
+            std::map<string, string> _mStatus;
+            tars_invoke_async(tars::TARSNORMAL,"testCoroSerial", _os, context, _mStatus, callback);
+        }
+        
+        void coro_testCoroSerial(BServantCoroPrxCallbackPtr callback,const std::string &sIn,const map<string, string>& context = TARS_CONTEXT())
+        {
+            tars::TarsOutputStream<tars::BufferWriterVector> _os;
+            _os.write(sIn, 1);
+            std::map<string, string> _mStatus;
+            tars_invoke_async(tars::TARSNORMAL,"testCoroSerial", _os, context, _mStatus, callback);
+        }
+
+        BServantProxy* tars_hash(int64_t key)
+        {
+            return (BServantProxy*)ServantProxy::tars_hash(key);
+        }
+
+        BServantProxy* tars_consistent_hash(int64_t key)
+        {
+            return (BServantProxy*)ServantProxy::tars_consistent_hash(key);
+        }
+
+        BServantProxy* tars_set_timeout(int msecond)
+        {
+            return (BServantProxy*)ServantProxy::tars_set_timeout(msecond);
+        }
+
+        static const char* tars_prxname() { return "BServantProxy"; }
+    };
+    typedef tars::TC_AutoPtr<BServantProxy> BServantPrx;
+
+    /* servant for server */
+    class BServant : public tars::Servant
+    {
+    public:
+        virtual ~BServant(){}
+        virtual tars::Int32 test(tars::TarsCurrentPtr current) = 0;
+        static void async_response_test(tars::TarsCurrentPtr current, tars::Int32 _ret)
+        {
+            if (current->getRequestVersion() == TUPVERSION )
+            {
+                UniAttribute<tars::BufferWriterVector, tars::BufferReader>  tarsAttr;
+                tarsAttr.setVersion(current->getRequestVersion());
+                tarsAttr.put("", _ret);
+
+                vector<char> sTupResponseBuffer;
+                tarsAttr.encode(sTupResponseBuffer);
+                current->sendResponse(tars::TARSSERVERSUCCESS, sTupResponseBuffer);
+            }
+            else
+            {
+                tars::TarsOutputStream<tars::BufferWriterVector> _os;
+                _os.write(_ret, 0);
+
+                current->sendResponse(tars::TARSSERVERSUCCESS, _os.getByteBuffer());
+            }
+        }
+
+        virtual tars::Int32 testCoroParallel(const std::string & sIn,std::string &sOut,tars::TarsCurrentPtr current) = 0;
+        static void async_response_testCoroParallel(tars::TarsCurrentPtr current, tars::Int32 _ret, const std::string &sOut)
+        {
+            if (current->getRequestVersion() == TUPVERSION )
+            {
+                UniAttribute<tars::BufferWriterVector, tars::BufferReader>  tarsAttr;
+                tarsAttr.setVersion(current->getRequestVersion());
+                tarsAttr.put("", _ret);
+                tarsAttr.put("sOut", sOut);
+
+                vector<char> sTupResponseBuffer;
+                tarsAttr.encode(sTupResponseBuffer);
+                current->sendResponse(tars::TARSSERVERSUCCESS, sTupResponseBuffer);
+            }
+            else
+            {
+                tars::TarsOutputStream<tars::BufferWriterVector> _os;
+                _os.write(_ret, 0);
+
+                _os.write(sOut, 2);
+
+                current->sendResponse(tars::TARSSERVERSUCCESS, _os.getByteBuffer());
+            }
+        }
+
+        virtual tars::Int32 testCoroSerial(const std::string & sIn,std::string &sOut,tars::TarsCurrentPtr current) = 0;
+        static void async_response_testCoroSerial(tars::TarsCurrentPtr current, tars::Int32 _ret, const std::string &sOut)
+        {
+            if (current->getRequestVersion() == TUPVERSION )
+            {
+                UniAttribute<tars::BufferWriterVector, tars::BufferReader>  tarsAttr;
+                tarsAttr.setVersion(current->getRequestVersion());
+                tarsAttr.put("", _ret);
+                tarsAttr.put("sOut", sOut);
+
+                vector<char> sTupResponseBuffer;
+                tarsAttr.encode(sTupResponseBuffer);
+                current->sendResponse(tars::TARSSERVERSUCCESS, sTupResponseBuffer);
+            }
+            else
+            {
+                tars::TarsOutputStream<tars::BufferWriterVector> _os;
+                _os.write(_ret, 0);
+
+                _os.write(sOut, 2);
+
+                current->sendResponse(tars::TARSSERVERSUCCESS, _os.getByteBuffer());
+            }
+        }
+
+    public:
+        int onDispatch(tars::TarsCurrentPtr _current, vector<char> &_sResponseBuffer)
+        {
+            static ::std::string __Test__BServant_all[]=
+            {
+                "test",
+                "testCoroParallel",
+                "testCoroSerial"
+            };
+
+            pair<string*, string*> r = equal_range(__Test__BServant_all, __Test__BServant_all+3, _current->getFuncName());
+            if(r.first == r.second) return tars::TARSSERVERNOFUNCERR;
+            switch(r.first - __Test__BServant_all)
+            {
+                case 0:
+                {
+                    tars::TarsInputStream<tars::BufferReader> _is;
+                    _is.setBuffer(_current->getRequestBuffer());
+                    if (_current->getRequestVersion() == TUPVERSION)
+                    {
+                        UniAttribute<tars::BufferWriterVector, tars::BufferReader>  tarsAttr;
+                        tarsAttr.setVersion(_current->getRequestVersion());
+                        tarsAttr.decode(_current->getRequestBuffer());
+                    }
+                    else
+                    {
+                    }
+                    tars::Int32 _ret = test(_current);
+                    if(_current->isResponse())
+                    {
+                        if (_current->getRequestVersion() == TUPVERSION )
+                        {
+                            UniAttribute<tars::BufferWriterVector, tars::BufferReader>  tarsAttr;
+                            tarsAttr.setVersion(_current->getRequestVersion());
+                            tarsAttr.put("", _ret);
+                            tarsAttr.encode(_sResponseBuffer);
+                        }
+                        else
+                        {
+                            tars::TarsOutputStream<tars::BufferWriterVector> _os;
+                            _os.write(_ret, 0);
+                            _os.swap(_sResponseBuffer);
+                        }
+                    }
+                    return tars::TARSSERVERSUCCESS;
+
+                }
+                case 1:
+                {
+                    tars::TarsInputStream<tars::BufferReader> _is;
+                    _is.setBuffer(_current->getRequestBuffer());
+                    std::string sIn;
+                    std::string sOut;
+                    if (_current->getRequestVersion() == TUPVERSION)
+                    {
+                        UniAttribute<tars::BufferWriterVector, tars::BufferReader>  tarsAttr;
+                        tarsAttr.setVersion(_current->getRequestVersion());
+                        tarsAttr.decode(_current->getRequestBuffer());
+                        tarsAttr.get("sIn", sIn);
+                        tarsAttr.getByDefault("sOut", sOut, sOut);
+                    }
+                    else
+                    {
+                        _is.read(sIn, 1, true);
+                        _is.read(sOut, 2, false);
+                    }
+                    tars::Int32 _ret = testCoroParallel(sIn,sOut, _current);
+                    if(_current->isResponse())
+                    {
+                        if (_current->getRequestVersion() == TUPVERSION )
+                        {
+                            UniAttribute<tars::BufferWriterVector, tars::BufferReader>  tarsAttr;
+                            tarsAttr.setVersion(_current->getRequestVersion());
+                            tarsAttr.put("", _ret);
+                            tarsAttr.put("sOut", sOut);
+                            tarsAttr.encode(_sResponseBuffer);
+                        }
+                        else
+                        {
+                            tars::TarsOutputStream<tars::BufferWriterVector> _os;
+                            _os.write(_ret, 0);
+                            _os.write(sOut, 2);
+                            _os.swap(_sResponseBuffer);
+                        }
+                    }
+                    return tars::TARSSERVERSUCCESS;
+
+                }
+                case 2:
+                {
+                    tars::TarsInputStream<tars::BufferReader> _is;
+                    _is.setBuffer(_current->getRequestBuffer());
+                    std::string sIn;
+                    std::string sOut;
+                    if (_current->getRequestVersion() == TUPVERSION)
+                    {
+                        UniAttribute<tars::BufferWriterVector, tars::BufferReader>  tarsAttr;
+                        tarsAttr.setVersion(_current->getRequestVersion());
+                        tarsAttr.decode(_current->getRequestBuffer());
+                        tarsAttr.get("sIn", sIn);
+                        tarsAttr.getByDefault("sOut", sOut, sOut);
+                    }
+                    else
+                    {
+                        _is.read(sIn, 1, true);
+                        _is.read(sOut, 2, false);
+                    }
+                    tars::Int32 _ret = testCoroSerial(sIn,sOut, _current);
+                    if(_current->isResponse())
+                    {
+                        if (_current->getRequestVersion() == TUPVERSION )
+                        {
+                            UniAttribute<tars::BufferWriterVector, tars::BufferReader>  tarsAttr;
+                            tarsAttr.setVersion(_current->getRequestVersion());
+                            tarsAttr.put("", _ret);
+                            tarsAttr.put("sOut", sOut);
+                            tarsAttr.encode(_sResponseBuffer);
+                        }
+                        else
+                        {
+                            tars::TarsOutputStream<tars::BufferWriterVector> _os;
+                            _os.write(_ret, 0);
+                            _os.write(sOut, 2);
+                            _os.swap(_sResponseBuffer);
+                        }
+                    }
+                    return tars::TARSSERVERSUCCESS;
+
+                }
+            }
+            return tars::TARSSERVERNOFUNCERR;
+        }
+    };
+
+
+}
+
+
+
+#endif
diff --git a/examples/CoroutineDemo/testParallelCoro/BServant.h b/examples/CoroutineDemo/testParallelCoro/BServant.h
new file mode 100644
index 0000000..b3092d6
--- /dev/null
+++ b/examples/CoroutineDemo/testParallelCoro/BServant.h
@@ -0,0 +1,648 @@
+// **********************************************************************
+// This file was generated by a TARS parser!
+// TARS version 1.4.0.
+// **********************************************************************
+
+#ifndef __BSERVANT_H_
+#define __BSERVANT_H_
+
+#include <map>
+#include <string>
+#include <vector>
+#include "tup/Tars.h"
+#include "tup/TarsJson.h"
+using namespace std;
+#include "servant/ServantProxy.h"
+#include "servant/Servant.h"
+
+
+namespace Test
+{
+
+    /* callback of async proxy for client */
+    class BServantPrxCallback: public tars::ServantProxyCallback
+    {
+    public:
+        virtual ~BServantPrxCallback(){}
+        virtual void callback_test(tars::Int32 ret)
+        { throw std::runtime_error("callback_test() override incorrect."); }
+        virtual void callback_test_exception(tars::Int32 ret)
+        { throw std::runtime_error("callback_test_exception() override incorrect."); }
+
+        virtual void callback_testCoroParallel(tars::Int32 ret,  const std::string& sOut)
+        { throw std::runtime_error("callback_testCoroParallel() override incorrect."); }
+        virtual void callback_testCoroParallel_exception(tars::Int32 ret)
+        { throw std::runtime_error("callback_testCoroParallel_exception() override incorrect."); }
+
+        virtual void callback_testCoroSerial(tars::Int32 ret,  const std::string& sOut)
+        { throw std::runtime_error("callback_testCoroSerial() override incorrect."); }
+        virtual void callback_testCoroSerial_exception(tars::Int32 ret)
+        { throw std::runtime_error("callback_testCoroSerial_exception() override incorrect."); }
+
+    public:
+        virtual const map<std::string, std::string> & getResponseContext() const
+        {
+            CallbackThreadData * pCbtd = CallbackThreadData::getData();
+            assert(pCbtd != NULL);
+
+            if(!pCbtd->getContextValid())
+            {
+                throw TC_Exception("cann't get response context");
+            }
+            return pCbtd->getResponseContext();
+        }
+
+    public:
+        virtual int onDispatch(tars::ReqMessagePtr msg)
+        {
+            static ::std::string __BServant_all[]=
+            {
+                "test",
+                "testCoroParallel",
+                "testCoroSerial"
+            };
+            pair<string*, string*> r = equal_range(__BServant_all, __BServant_all+3, string(msg->request.sFuncName));
+            if(r.first == r.second) return tars::TARSSERVERNOFUNCERR;
+            switch(r.first - __BServant_all)
+            {
+                case 0:
+                {
+                    if (msg->response->iRet != tars::TARSSERVERSUCCESS)
+                    {
+                        callback_test_exception(msg->response->iRet);
+
+                        return msg->response->iRet;
+                    }
+                    tars::TarsInputStream<tars::BufferReader> _is;
+
+                    _is.setBuffer(msg->response->sBuffer);
+                    tars::Int32 _ret;
+                    _is.read(_ret, 0, true);
+
+                    CallbackThreadData * pCbtd = CallbackThreadData::getData();
+                    assert(pCbtd != NULL);
+
+                    pCbtd->setResponseContext(msg->response->context);
+
+                    callback_test(_ret);
+
+                    pCbtd->delResponseContext();
+
+                    return tars::TARSSERVERSUCCESS;
+
+                }
+                case 1:
+                {
+                    if (msg->response->iRet != tars::TARSSERVERSUCCESS)
+                    {
+                        callback_testCoroParallel_exception(msg->response->iRet);
+
+                        return msg->response->iRet;
+                    }
+                    tars::TarsInputStream<tars::BufferReader> _is;
+
+                    _is.setBuffer(msg->response->sBuffer);
+                    tars::Int32 _ret;
+                    _is.read(_ret, 0, true);
+
+                    std::string sOut;
+                    _is.read(sOut, 2, true);
+                    CallbackThreadData * pCbtd = CallbackThreadData::getData();
+                    assert(pCbtd != NULL);
+
+                    pCbtd->setResponseContext(msg->response->context);
+
+                    callback_testCoroParallel(_ret, sOut);
+
+                    pCbtd->delResponseContext();
+
+                    return tars::TARSSERVERSUCCESS;
+
+                }
+                case 2:
+                {
+                    if (msg->response->iRet != tars::TARSSERVERSUCCESS)
+                    {
+                        callback_testCoroSerial_exception(msg->response->iRet);
+
+                        return msg->response->iRet;
+                    }
+                    tars::TarsInputStream<tars::BufferReader> _is;
+
+                    _is.setBuffer(msg->response->sBuffer);
+                    tars::Int32 _ret;
+                    _is.read(_ret, 0, true);
+
+                    std::string sOut;
+                    _is.read(sOut, 2, true);
+                    CallbackThreadData * pCbtd = CallbackThreadData::getData();
+                    assert(pCbtd != NULL);
+
+                    pCbtd->setResponseContext(msg->response->context);
+
+                    callback_testCoroSerial(_ret, sOut);
+
+                    pCbtd->delResponseContext();
+
+                    return tars::TARSSERVERSUCCESS;
+
+                }
+            }
+            return tars::TARSSERVERNOFUNCERR;
+        }
+
+    };
+    typedef tars::TC_AutoPtr<BServantPrxCallback> BServantPrxCallbackPtr;
+
+    /* callback of coroutine async proxy for client */
+    class BServantCoroPrxCallback: public BServantPrxCallback
+    {
+    public:
+        virtual ~BServantCoroPrxCallback(){}
+    public:
+        virtual const map<std::string, std::string> & getResponseContext() const { return _mRspContext; }
+
+        virtual void setResponseContext(const map<std::string, std::string> &mContext) { _mRspContext = mContext; }
+
+    public:
+        int onDispatch(tars::ReqMessagePtr msg)
+        {
+            static ::std::string __BServant_all[]=
+            {
+                "test",
+                "testCoroParallel",
+                "testCoroSerial"
+            };
+
+            pair<string*, string*> r = equal_range(__BServant_all, __BServant_all+3, string(msg->request.sFuncName));
+            if(r.first == r.second) return tars::TARSSERVERNOFUNCERR;
+            switch(r.first - __BServant_all)
+            {
+                case 0:
+                {
+                    if (msg->response->iRet != tars::TARSSERVERSUCCESS)
+                    {
+                        callback_test_exception(msg->response->iRet);
+
+                        return msg->response->iRet;
+                    }
+                    tars::TarsInputStream<tars::BufferReader> _is;
+
+                    _is.setBuffer(msg->response->sBuffer);
+                    try
+                    {
+                        tars::Int32 _ret;
+                        _is.read(_ret, 0, true);
+
+                        setResponseContext(msg->response->context);
+
+                        callback_test(_ret);
+
+                    }
+                    catch(std::exception &ex)
+                    {
+                        callback_test_exception(tars::TARSCLIENTDECODEERR);
+
+                        return tars::TARSCLIENTDECODEERR;
+                    }
+                    catch(...)
+                    {
+                        callback_test_exception(tars::TARSCLIENTDECODEERR);
+
+                        return tars::TARSCLIENTDECODEERR;
+                    }
+
+                    return tars::TARSSERVERSUCCESS;
+
+                }
+                case 1:
+                {
+                    if (msg->response->iRet != tars::TARSSERVERSUCCESS)
+                    {
+                        callback_testCoroParallel_exception(msg->response->iRet);
+
+                        return msg->response->iRet;
+                    }
+                    tars::TarsInputStream<tars::BufferReader> _is;
+
+                    _is.setBuffer(msg->response->sBuffer);
+                    try
+                    {
+                        tars::Int32 _ret;
+                        _is.read(_ret, 0, true);
+
+                        std::string sOut;
+                        _is.read(sOut, 2, true);
+                        setResponseContext(msg->response->context);
+
+                        callback_testCoroParallel(_ret, sOut);
+
+                    }
+                    catch(std::exception &ex)
+                    {
+                        callback_testCoroParallel_exception(tars::TARSCLIENTDECODEERR);
+
+                        return tars::TARSCLIENTDECODEERR;
+                    }
+                    catch(...)
+                    {
+                        callback_testCoroParallel_exception(tars::TARSCLIENTDECODEERR);
+
+                        return tars::TARSCLIENTDECODEERR;
+                    }
+
+                    return tars::TARSSERVERSUCCESS;
+
+                }
+                case 2:
+                {
+                    if (msg->response->iRet != tars::TARSSERVERSUCCESS)
+                    {
+                        callback_testCoroSerial_exception(msg->response->iRet);
+
+                        return msg->response->iRet;
+                    }
+                    tars::TarsInputStream<tars::BufferReader> _is;
+
+                    _is.setBuffer(msg->response->sBuffer);
+                    try
+                    {
+                        tars::Int32 _ret;
+                        _is.read(_ret, 0, true);
+
+                        std::string sOut;
+                        _is.read(sOut, 2, true);
+                        setResponseContext(msg->response->context);
+
+                        callback_testCoroSerial(_ret, sOut);
+
+                    }
+                    catch(std::exception &ex)
+                    {
+                        callback_testCoroSerial_exception(tars::TARSCLIENTDECODEERR);
+
+                        return tars::TARSCLIENTDECODEERR;
+                    }
+                    catch(...)
+                    {
+                        callback_testCoroSerial_exception(tars::TARSCLIENTDECODEERR);
+
+                        return tars::TARSCLIENTDECODEERR;
+                    }
+
+                    return tars::TARSSERVERSUCCESS;
+
+                }
+            }
+            return tars::TARSSERVERNOFUNCERR;
+        }
+
+    protected:
+        map<std::string, std::string> _mRspContext;
+    };
+    typedef tars::TC_AutoPtr<BServantCoroPrxCallback> BServantCoroPrxCallbackPtr;
+
+    /* proxy for client */
+    class BServantProxy : public tars::ServantProxy
+    {
+    public:
+        typedef map<string, string> TARS_CONTEXT;
+        tars::Int32 test(const map<string, string> &context = TARS_CONTEXT(),map<string, string> * pResponseContext = NULL)
+        {
+            tars::TarsOutputStream<tars::BufferWriterVector> _os;
+            std::map<string, string> _mStatus;
+            shared_ptr<tars::ResponsePacket> rep = tars_invoke(tars::TARSNORMAL,"test", _os, context, _mStatus);
+            if(pResponseContext)
+            {
+                pResponseContext->swap(rep->context);
+            }
+
+            tars::TarsInputStream<tars::BufferReader> _is;
+            _is.setBuffer(rep->sBuffer);
+            tars::Int32 _ret;
+            _is.read(_ret, 0, true);
+            return _ret;
+        }
+
+        void async_test(BServantPrxCallbackPtr callback,const map<string, string>& context = TARS_CONTEXT())
+        {
+            tars::TarsOutputStream<tars::BufferWriterVector> _os;
+            std::map<string, string> _mStatus;
+            tars_invoke_async(tars::TARSNORMAL,"test", _os, context, _mStatus, callback);
+        }
+        
+        void coro_test(BServantCoroPrxCallbackPtr callback,const map<string, string>& context = TARS_CONTEXT())
+        {
+            tars::TarsOutputStream<tars::BufferWriterVector> _os;
+            std::map<string, string> _mStatus;
+            tars_invoke_async(tars::TARSNORMAL,"test", _os, context, _mStatus, callback);
+        }
+
+        tars::Int32 testCoroParallel(const std::string & sIn,std::string &sOut,const map<string, string> &context = TARS_CONTEXT(),map<string, string> * pResponseContext = NULL)
+        {
+            tars::TarsOutputStream<tars::BufferWriterVector> _os;
+            _os.write(sIn, 1);
+            _os.write(sOut, 2);
+            std::map<string, string> _mStatus;
+            shared_ptr<tars::ResponsePacket> rep = tars_invoke(tars::TARSNORMAL,"testCoroParallel", _os, context, _mStatus);
+            if(pResponseContext)
+            {
+                pResponseContext->swap(rep->context);
+            }
+
+            tars::TarsInputStream<tars::BufferReader> _is;
+            _is.setBuffer(rep->sBuffer);
+            tars::Int32 _ret;
+            _is.read(_ret, 0, true);
+            _is.read(sOut, 2, true);
+            return _ret;
+        }
+
+        void async_testCoroParallel(BServantPrxCallbackPtr callback,const std::string &sIn,const map<string, string>& context = TARS_CONTEXT())
+        {
+            tars::TarsOutputStream<tars::BufferWriterVector> _os;
+            _os.write(sIn, 1);
+            std::map<string, string> _mStatus;
+            tars_invoke_async(tars::TARSNORMAL,"testCoroParallel", _os, context, _mStatus, callback);
+        }
+        
+        void coro_testCoroParallel(BServantCoroPrxCallbackPtr callback,const std::string &sIn,const map<string, string>& context = TARS_CONTEXT())
+        {
+            tars::TarsOutputStream<tars::BufferWriterVector> _os;
+            _os.write(sIn, 1);
+            std::map<string, string> _mStatus;
+            tars_invoke_async(tars::TARSNORMAL,"testCoroParallel", _os, context, _mStatus, callback);
+        }
+
+        tars::Int32 testCoroSerial(const std::string & sIn,std::string &sOut,const map<string, string> &context = TARS_CONTEXT(),map<string, string> * pResponseContext = NULL)
+        {
+            tars::TarsOutputStream<tars::BufferWriterVector> _os;
+            _os.write(sIn, 1);
+            _os.write(sOut, 2);
+            std::map<string, string> _mStatus;
+            shared_ptr<tars::ResponsePacket> rep = tars_invoke(tars::TARSNORMAL,"testCoroSerial", _os, context, _mStatus);
+            if(pResponseContext)
+            {
+                pResponseContext->swap(rep->context);
+            }
+
+            tars::TarsInputStream<tars::BufferReader> _is;
+            _is.setBuffer(rep->sBuffer);
+            tars::Int32 _ret;
+            _is.read(_ret, 0, true);
+            _is.read(sOut, 2, true);
+            return _ret;
+        }
+
+        void async_testCoroSerial(BServantPrxCallbackPtr callback,const std::string &sIn,const map<string, string>& context = TARS_CONTEXT())
+        {
+            tars::TarsOutputStream<tars::BufferWriterVector> _os;
+            _os.write(sIn, 1);
+            std::map<string, string> _mStatus;
+            tars_invoke_async(tars::TARSNORMAL,"testCoroSerial", _os, context, _mStatus, callback);
+        }
+        
+        void coro_testCoroSerial(BServantCoroPrxCallbackPtr callback,const std::string &sIn,const map<string, string>& context = TARS_CONTEXT())
+        {
+            tars::TarsOutputStream<tars::BufferWriterVector> _os;
+            _os.write(sIn, 1);
+            std::map<string, string> _mStatus;
+            tars_invoke_async(tars::TARSNORMAL,"testCoroSerial", _os, context, _mStatus, callback);
+        }
+
+        BServantProxy* tars_hash(int64_t key)
+        {
+            return (BServantProxy*)ServantProxy::tars_hash(key);
+        }
+
+        BServantProxy* tars_consistent_hash(int64_t key)
+        {
+            return (BServantProxy*)ServantProxy::tars_consistent_hash(key);
+        }
+
+        BServantProxy* tars_set_timeout(int msecond)
+        {
+            return (BServantProxy*)ServantProxy::tars_set_timeout(msecond);
+        }
+
+        static const char* tars_prxname() { return "BServantProxy"; }
+    };
+    typedef tars::TC_AutoPtr<BServantProxy> BServantPrx;
+
+    /* servant for server */
+    class BServant : public tars::Servant
+    {
+    public:
+        virtual ~BServant(){}
+        virtual tars::Int32 test(tars::TarsCurrentPtr current) = 0;
+        static void async_response_test(tars::TarsCurrentPtr current, tars::Int32 _ret)
+        {
+            if (current->getRequestVersion() == TUPVERSION )
+            {
+                UniAttribute<tars::BufferWriterVector, tars::BufferReader>  tarsAttr;
+                tarsAttr.setVersion(current->getRequestVersion());
+                tarsAttr.put("", _ret);
+
+                vector<char> sTupResponseBuffer;
+                tarsAttr.encode(sTupResponseBuffer);
+                current->sendResponse(tars::TARSSERVERSUCCESS, sTupResponseBuffer);
+            }
+            else
+            {
+                tars::TarsOutputStream<tars::BufferWriterVector> _os;
+                _os.write(_ret, 0);
+
+                current->sendResponse(tars::TARSSERVERSUCCESS, _os.getByteBuffer());
+            }
+        }
+
+        virtual tars::Int32 testCoroParallel(const std::string & sIn,std::string &sOut,tars::TarsCurrentPtr current) = 0;
+        static void async_response_testCoroParallel(tars::TarsCurrentPtr current, tars::Int32 _ret, const std::string &sOut)
+        {
+            if (current->getRequestVersion() == TUPVERSION )
+            {
+                UniAttribute<tars::BufferWriterVector, tars::BufferReader>  tarsAttr;
+                tarsAttr.setVersion(current->getRequestVersion());
+                tarsAttr.put("", _ret);
+                tarsAttr.put("sOut", sOut);
+
+                vector<char> sTupResponseBuffer;
+                tarsAttr.encode(sTupResponseBuffer);
+                current->sendResponse(tars::TARSSERVERSUCCESS, sTupResponseBuffer);
+            }
+            else
+            {
+                tars::TarsOutputStream<tars::BufferWriterVector> _os;
+                _os.write(_ret, 0);
+
+                _os.write(sOut, 2);
+
+                current->sendResponse(tars::TARSSERVERSUCCESS, _os.getByteBuffer());
+            }
+        }
+
+        virtual tars::Int32 testCoroSerial(const std::string & sIn,std::string &sOut,tars::TarsCurrentPtr current) = 0;
+        static void async_response_testCoroSerial(tars::TarsCurrentPtr current, tars::Int32 _ret, const std::string &sOut)
+        {
+            if (current->getRequestVersion() == TUPVERSION )
+            {
+                UniAttribute<tars::BufferWriterVector, tars::BufferReader>  tarsAttr;
+                tarsAttr.setVersion(current->getRequestVersion());
+                tarsAttr.put("", _ret);
+                tarsAttr.put("sOut", sOut);
+
+                vector<char> sTupResponseBuffer;
+                tarsAttr.encode(sTupResponseBuffer);
+                current->sendResponse(tars::TARSSERVERSUCCESS, sTupResponseBuffer);
+            }
+            else
+            {
+                tars::TarsOutputStream<tars::BufferWriterVector> _os;
+                _os.write(_ret, 0);
+
+                _os.write(sOut, 2);
+
+                current->sendResponse(tars::TARSSERVERSUCCESS, _os.getByteBuffer());
+            }
+        }
+
+    public:
+        int onDispatch(tars::TarsCurrentPtr _current, vector<char> &_sResponseBuffer)
+        {
+            static ::std::string __Test__BServant_all[]=
+            {
+                "test",
+                "testCoroParallel",
+                "testCoroSerial"
+            };
+
+            pair<string*, string*> r = equal_range(__Test__BServant_all, __Test__BServant_all+3, _current->getFuncName());
+            if(r.first == r.second) return tars::TARSSERVERNOFUNCERR;
+            switch(r.first - __Test__BServant_all)
+            {
+                case 0:
+                {
+                    tars::TarsInputStream<tars::BufferReader> _is;
+                    _is.setBuffer(_current->getRequestBuffer());
+                    if (_current->getRequestVersion() == TUPVERSION)
+                    {
+                        UniAttribute<tars::BufferWriterVector, tars::BufferReader>  tarsAttr;
+                        tarsAttr.setVersion(_current->getRequestVersion());
+                        tarsAttr.decode(_current->getRequestBuffer());
+                    }
+                    else
+                    {
+                    }
+                    tars::Int32 _ret = test(_current);
+                    if(_current->isResponse())
+                    {
+                        if (_current->getRequestVersion() == TUPVERSION )
+                        {
+                            UniAttribute<tars::BufferWriterVector, tars::BufferReader>  tarsAttr;
+                            tarsAttr.setVersion(_current->getRequestVersion());
+                            tarsAttr.put("", _ret);
+                            tarsAttr.encode(_sResponseBuffer);
+                        }
+                        else
+                        {
+                            tars::TarsOutputStream<tars::BufferWriterVector> _os;
+                            _os.write(_ret, 0);
+                            _os.swap(_sResponseBuffer);
+                        }
+                    }
+                    return tars::TARSSERVERSUCCESS;
+
+                }
+                case 1:
+                {
+                    tars::TarsInputStream<tars::BufferReader> _is;
+                    _is.setBuffer(_current->getRequestBuffer());
+                    std::string sIn;
+                    std::string sOut;
+                    if (_current->getRequestVersion() == TUPVERSION)
+                    {
+                        UniAttribute<tars::BufferWriterVector, tars::BufferReader>  tarsAttr;
+                        tarsAttr.setVersion(_current->getRequestVersion());
+                        tarsAttr.decode(_current->getRequestBuffer());
+                        tarsAttr.get("sIn", sIn);
+                        tarsAttr.getByDefault("sOut", sOut, sOut);
+                    }
+                    else
+                    {
+                        _is.read(sIn, 1, true);
+                        _is.read(sOut, 2, false);
+                    }
+                    tars::Int32 _ret = testCoroParallel(sIn,sOut, _current);
+                    if(_current->isResponse())
+                    {
+                        if (_current->getRequestVersion() == TUPVERSION )
+                        {
+                            UniAttribute<tars::BufferWriterVector, tars::BufferReader>  tarsAttr;
+                            tarsAttr.setVersion(_current->getRequestVersion());
+                            tarsAttr.put("", _ret);
+                            tarsAttr.put("sOut", sOut);
+                            tarsAttr.encode(_sResponseBuffer);
+                        }
+                        else
+                        {
+                            tars::TarsOutputStream<tars::BufferWriterVector> _os;
+                            _os.write(_ret, 0);
+                            _os.write(sOut, 2);
+                            _os.swap(_sResponseBuffer);
+                        }
+                    }
+                    return tars::TARSSERVERSUCCESS;
+
+                }
+                case 2:
+                {
+                    tars::TarsInputStream<tars::BufferReader> _is;
+                    _is.setBuffer(_current->getRequestBuffer());
+                    std::string sIn;
+                    std::string sOut;
+                    if (_current->getRequestVersion() == TUPVERSION)
+                    {
+                        UniAttribute<tars::BufferWriterVector, tars::BufferReader>  tarsAttr;
+                        tarsAttr.setVersion(_current->getRequestVersion());
+                        tarsAttr.decode(_current->getRequestBuffer());
+                        tarsAttr.get("sIn", sIn);
+                        tarsAttr.getByDefault("sOut", sOut, sOut);
+                    }
+                    else
+                    {
+                        _is.read(sIn, 1, true);
+                        _is.read(sOut, 2, false);
+                    }
+                    tars::Int32 _ret = testCoroSerial(sIn,sOut, _current);
+                    if(_current->isResponse())
+                    {
+                        if (_current->getRequestVersion() == TUPVERSION )
+                        {
+                            UniAttribute<tars::BufferWriterVector, tars::BufferReader>  tarsAttr;
+                            tarsAttr.setVersion(_current->getRequestVersion());
+                            tarsAttr.put("", _ret);
+                            tarsAttr.put("sOut", sOut);
+                            tarsAttr.encode(_sResponseBuffer);
+                        }
+                        else
+                        {
+                            tars::TarsOutputStream<tars::BufferWriterVector> _os;
+                            _os.write(_ret, 0);
+                            _os.write(sOut, 2);
+                            _os.swap(_sResponseBuffer);
+                        }
+                    }
+                    return tars::TARSSERVERSUCCESS;
+
+                }
+            }
+            return tars::TARSSERVERNOFUNCERR;
+        }
+    };
+
+
+}
+
+
+
+#endif
diff --git a/examples/PromiseDemo/AServer/AServant.tars b/examples/PromiseDemo/AServer/AServant.tars
deleted file mode 100644
index 1255254..0000000
--- a/examples/PromiseDemo/AServer/AServant.tars
+++ /dev/null
@@ -1,27 +0,0 @@
-/**
- * Tencent is pleased to support the open source community by making Tars available.
- *
- * Copyright (C) 2016THL A29 Limited, a Tencent company. All rights reserved.
- *
- * Licensed under the BSD 3-Clause License (the "License"); you may not use this file except 
- * in compliance with the License. You may obtain a copy of the License at
- *
- * https://opensource.org/licenses/BSD-3-Clause
- *
- * Unless required by applicable law or agreed to in writing, software distributed 
- * under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR 
- * CONDITIONS OF ANY KIND, either express or implied. See the License for the 
- * specific language governing permissions and limitations under the License.
- */
-
-module Test
-{
-
-interface AServant
-{
-    int queryResultSerial(string sIn, out string sOut);
-    
-    int queryResultParallel(string sIn, out string sOut);
-};
-
-}; 
diff --git a/examples/PromiseDemo/AServer/AServantImp.cpp b/examples/PromiseDemo/AServer/AServantImp.cpp
deleted file mode 100644
index adeab46..0000000
--- a/examples/PromiseDemo/AServer/AServantImp.cpp
+++ /dev/null
@@ -1,267 +0,0 @@
-/**
- * Tencent is pleased to support the open source community by making Tars available.
- *
- * Copyright (C) 2016THL A29 Limited, a Tencent company. All rights reserved.
- *
- * Licensed under the BSD 3-Clause License (the "License"); you may not use this file except 
- * in compliance with the License. You may obtain a copy of the License at
- *
- * https://opensource.org/licenses/BSD-3-Clause
- *
- * Unless required by applicable law or agreed to in writing, software distributed 
- * under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR 
- * CONDITIONS OF ANY KIND, either express or implied. See the License for the 
- * specific language governing permissions and limitations under the License.
- */
-
-#include "AServantImp.h"
-#include "AServer.h"
-#include "servant/Application.h"
-#include "servant/Communicator.h"
-
-using namespace std;
-using namespace tars;
-
-//////////////////////////////////////////////////////
-class BServantCallback : public BServantPrxCallback
-{
-
-public:
-    BServantCallback(TarsCurrentPtr &current)
-    : _current(current)
-    {}
-
-    BServantCallback(TarsCurrentPtr &current, const tars::Promise<std::string> &promise)
-    : _current(current)
-    , _promise(promise)
-    {}
-
-    void callback_queryResult(tars::Int32 ret, const std::string &sOut)
-    {
-        if(ret == 0)
-        {
-            _promise.setValue(sOut);
-        }
-        else
-        {
-            handExp("callback_queryResult", ret);
-        }
-    }
-    void callback_queryResult_exception(tars::Int32 ret)
-    {
-        handExp("callback_queryResult_exception", ret);
-    }
-
-private:
-    void handExp(const std::string &sFuncName, tars::Int32 ret)
-    {
-        string s("sFuncName:");
-        s += sFuncName;
-        s += "|ret:";
-        s += TC_Common::tostr(ret);
-
-        _promise.setException(tars::copyException(s));
-
-        TLOGDEBUG("ServerPrxCallback handExp:" << s << endl);
-    }
-
-private:
-
-    TarsCurrentPtr                    _current;
-    tars::Promise<std::string>    _promise;
-};
-//////////////////////////////////////////////////////
-class CServantCallback : public CServantPrxCallback
-{
-
-public:
-    CServantCallback(TarsCurrentPtr &current)
-    : _current(current)
-    {}
-
-    CServantCallback(TarsCurrentPtr &current, const tars::Promise<std::string> &promise)
-    : _current(current)
-    , _promise(promise)
-    {}
-
-    void callback_queryResult(tars::Int32 ret, const std::string &sOut)
-    {
-        if(ret == 0)
-        {
-            _promise.setValue(sOut);
-        }
-        else
-        {
-            handExp("callback_queryResult", ret);
-        }
-    }
-    void callback_queryResult_exception(tars::Int32 ret)
-    {
-        handExp("callback_queryResult_exception", ret);
-    }
-
-private:
-    void handExp(const std::string &sFuncName, tars::Int32 ret)
-    {
-        string s("sFuncName:");
-        s += sFuncName;
-        s += "|ret:";
-        s += TC_Common::tostr(ret);
-
-        _promise.setException(tars::copyException(s));
-
-        TLOGDEBUG("ServerPrxCallback handExp:" << s << endl);
-    }
-
-private:
-
-    TarsCurrentPtr                    _current;
-    tars::Promise<std::string>    _promise;
-};
-//////////////////////////////////////////////////////
-tars::Future<std::string> sendBReq(BServantPrx prx, const std::string& sIn, tars::TarsCurrentPtr current)
-{
-    tars::Promise<std::string> promise;
-
-    Test::BServantPrxCallbackPtr cb = new BServantCallback(current, promise);
-
-    prx->async_queryResult(cb, sIn);
-
-    return promise.getFuture();
-}
-//////////////////////////////////////////////////////
-tars::Future<std::string> sendCReq(CServantPrx prx, const std::string& sIn, tars::TarsCurrentPtr current)
-{
-    tars::Promise<std::string> promise;
-
-    Test::CServantPrxCallbackPtr cb = new CServantCallback(current, promise);
-
-    prx->async_queryResult(cb, sIn);
-
-    return promise.getFuture();
-}
-//////////////////////////////////////////////////////
-tars::Future<std::string> handleBRspAndSendCReq(CServantPrx prx, TarsCurrentPtr current, const tars::Future<std::string>& future)
-{
-    std::string sResult("");
-    std::string sException("");
-    try 
-    {
-        sResult = future.get();
-
-        return sendCReq(prx, sResult, current);
-    } 
-    catch (exception& e) 
-    {
-        TLOGDEBUG("Exception:" << e.what() << endl);
-        sException = e.what();
-    }
-
-    tars::Promise<std::string> promise;
-    promise.setValue(sException);
-
-    return promise.getFuture();
-}
-//////////////////////////////////////////////////////
-int handleCRspAndReturnClient(TarsCurrentPtr current, const tars::Future<std::string>& future)
-{
-    int ret = 0;
-    std::string sResult("");
-    try 
-    {
-        sResult = future.get();
-    } 
-    catch (exception& e) 
-    {
-        ret = -1;
-        sResult = e.what();
-
-        TLOGDEBUG("Exception:" << e.what() << endl);
-    }
-
-    AServant::async_response_queryResultSerial(current, ret, sResult);
-
-    return 0;
-}
-//////////////////////////////////////////////////////
-int handleBCRspAndReturnClient(TarsCurrentPtr current, const tars::Future<std::tuple<tars::Future<std::string>, tars::Future<std::string> > >& allFuture)
-{
-    int ret = 0;
-    std::string sResult("");
-    try 
-    {
-        std::tuple<tars::Future<std::string>, tars::Future<std::string> > tupleFuture = allFuture.get();
-
-        std::string sResult1 = std::get<0>(tupleFuture).get();
-        std::string sResult2 = std::get<1>(tupleFuture).get();
-
-        sResult = sResult1;
-        sResult += "|";
-        sResult += sResult2;
-    } 
-    catch (exception& e) 
-    {
-        ret = -1;
-        sResult = e.what();
-
-        TLOGDEBUG("Exception:" << e.what() << endl);
-    }
-
-    AServant::async_response_queryResultParallel(current, ret, sResult);
-
-    return 0;
-}
-//////////////////////////////////////////////////////
-void AServantImp::initialize()
-{
-    //initialize servant here:
-    //...
-    _pPrxB = Application::getCommunicator()->stringToProxy<BServantPrx>("Test.BServer.BServantObj");
-    _pPrxC = Application::getCommunicator()->stringToProxy<CServantPrx>("Test.CServer.CServantObj");
-}
-//////////////////////////////////////////////////////
-void AServantImp::destroy()
-{
-}
-
-// class Test1
-// {
-// public:
-//     template <typename R>
-//     void then(const std::function<R(const Future&)>& callback);
-//     {
-//         cout <<"then" << endl;
-//     }
-// }
-
-//////////////////////////////////////////////////////
-tars::Int32 AServantImp::queryResultSerial(const std::string& sIn, std::string &sOut, tars::TarsCurrentPtr current)
-{
-    current->setResponse(false);
-
-    tars::Future<std::string> f = sendBReq(_pPrxB, sIn, current);
-
-    auto b1 = std::bind(handleBRspAndSendCReq, _pPrxC, current);//, std::placeholders::_3);
-    auto b2 = std::bind(handleCRspAndReturnClient, current);//, std::placeholders::_2);
-    f.then(b1).then(b2);
-
-    // Test1 t;
-    // t.then<std::string>(b1);
-    return 0;
-}
-//////////////////////////////////////////////////////
-tars::Int32 AServantImp::queryResultParallel(const std::string& sIn, std::string &sOut, tars::TarsCurrentPtr current)
-{
-    current->setResponse(false);
-
-    tars::Future<std::string> f1 = sendBReq(_pPrxB, sIn, current);
-
-    tars::Future<std::string> f2 = sendCReq(_pPrxC, sIn, current);
-
-    tars::Future<std::tuple<tars::Future<std::string>, tars::Future<std::string> > > f_all = tars::whenAll(f1, f2);
-
-    f_all.then(std::bind(&handleBCRspAndReturnClient, current));
-
-    return 0;
-}
-
diff --git a/examples/PromiseDemo/AServer/AServantImp.h b/examples/PromiseDemo/AServer/AServantImp.h
deleted file mode 100644
index c73bf0b..0000000
--- a/examples/PromiseDemo/AServer/AServantImp.h
+++ /dev/null
@@ -1,63 +0,0 @@
-/**
- * Tencent is pleased to support the open source community by making Tars available.
- *
- * Copyright (C) 2016THL A29 Limited, a Tencent company. All rights reserved.
- *
- * Licensed under the BSD 3-Clause License (the "License"); you may not use this file except 
- * in compliance with the License. You may obtain a copy of the License at
- *
- * https://opensource.org/licenses/BSD-3-Clause
- *
- * Unless required by applicable law or agreed to in writing, software distributed 
- * under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR 
- * CONDITIONS OF ANY KIND, either express or implied. See the License for the 
- * specific language governing permissions and limitations under the License.
- */
-
-#ifndef _BServantImp_H_
-#define _BServantImp_H_
-
-#include "servant/Application.h"
-#include "AServant.h"
-#include "BServant.h"
-#include "CServant.h"
-#include "promise/promise.h"
-//#include "promise/tuple.h"
-
-#include "promise/when_all.h"
-
-using namespace Test;
-
-///////////////////////////////////
-tars::Future<std::string> sendBReq(BServantPrx prx, const std::string& sIn, tars::TarsCurrentPtr current);
-
-tars::Future<std::string> handleBRspAndSendCReq(CServantPrx prx, TarsCurrentPtr current, const tars::Future<std::string>& future);
-
-tars::Future<std::string> sendCReq(CServantPrx prx, const std::string& sIn, tars::TarsCurrentPtr current);
-
-int handleCRspAndReturnClient(TarsCurrentPtr current, const tars::Future<std::string>& future);
-
-///////////////////////////////////
-int handleBCRspAndReturnClient(TarsCurrentPtr current, const tars::Future<std::tuple<tars::Future<std::string>, tars::Future<std::string> > >& allFuture);
-
-///////////////////////////////////
-class AServantImp : public Test::AServant
-{
-public:
-
-    virtual ~AServantImp() {}
-
-    virtual void initialize();
-
-    virtual void destroy();
-
-    tars::Int32 queryResultSerial(const std::string& sIn, std::string &sOut, tars::TarsCurrentPtr current);
-
-    tars::Int32 queryResultParallel(const std::string& sIn, std::string &sOut, tars::TarsCurrentPtr current);
-
-private:
-    BServantPrx _pPrxB;
-    CServantPrx _pPrxC;
-};
-/////////////////////////////////////////////////////
-#endif
diff --git a/examples/PromiseDemo/AServer/AServer.cpp b/examples/PromiseDemo/AServer/AServer.cpp
deleted file mode 100644
index 09dbf2c..0000000
--- a/examples/PromiseDemo/AServer/AServer.cpp
+++ /dev/null
@@ -1,57 +0,0 @@
-/**
- * Tencent is pleased to support the open source community by making Tars available.
- *
- * Copyright (C) 2016THL A29 Limited, a Tencent company. All rights reserved.
- *
- * Licensed under the BSD 3-Clause License (the "License"); you may not use this file except 
- * in compliance with the License. You may obtain a copy of the License at
- *
- * https://opensource.org/licenses/BSD-3-Clause
- *
- * Unless required by applicable law or agreed to in writing, software distributed 
- * under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR 
- * CONDITIONS OF ANY KIND, either express or implied. See the License for the 
- * specific language governing permissions and limitations under the License.
- */
-
-#include "AServer.h"
-#include "AServantImp.h"
-
-using namespace std;
-
-AServer g_app;
-
-/////////////////////////////////////////////////////////////////
-void AServer::initialize()
-{
-    //initialize application here:
-    //... 
-
-    addServant<AServantImp>(ServerConfig::Application + "." + ServerConfig::ServerName + ".AServantObj");
-}
-/////////////////////////////////////////////////////////////////
-void AServer::destroyApp()
-{
-    //destroy application here:
-    //...
-}
-
-/////////////////////////////////////////////////////////////////
-int main(int argc, char* argv[])
-{
-    try
-    {
-        g_app.main(argc, argv);
-        g_app.waitForShutdown();
-    }
-    catch (std::exception& e)
-    {
-        cerr << "std::exception:" << e.what() << std::endl;
-    }
-    catch (...)
-    {
-        cerr << "unknown exception." << std::endl;
-    }
-    return -1;
-}
-/////////////////////////////////////////////////////////////////
diff --git a/examples/PromiseDemo/AServer/BServant.tars b/examples/PromiseDemo/AServer/BServant.tars
deleted file mode 100644
index 4f498e6..0000000
--- a/examples/PromiseDemo/AServer/BServant.tars
+++ /dev/null
@@ -1,25 +0,0 @@
-/**
- * Tencent is pleased to support the open source community by making Tars available.
- *
- * Copyright (C) 2016THL A29 Limited, a Tencent company. All rights reserved.
- *
- * Licensed under the BSD 3-Clause License (the "License"); you may not use this file except 
- * in compliance with the License. You may obtain a copy of the License at
- *
- * https://opensource.org/licenses/BSD-3-Clause
- *
- * Unless required by applicable law or agreed to in writing, software distributed 
- * under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR 
- * CONDITIONS OF ANY KIND, either express or implied. See the License for the 
- * specific language governing permissions and limitations under the License.
- */
-
-module Test
-{
-
-interface BServant
-{
-    int queryResult(string sIn, out string sOut);
-};
-
-}; 
diff --git a/examples/PromiseDemo/AServer/CMakeLists.txt b/examples/PromiseDemo/AServer/CMakeLists.txt
deleted file mode 100644
index 431ac99..0000000
--- a/examples/PromiseDemo/AServer/CMakeLists.txt
+++ /dev/null
@@ -1 +0,0 @@
-build_tars_server("PromiseDemoAServer")
\ No newline at end of file
diff --git a/examples/PromiseDemo/AServer/CServant.tars b/examples/PromiseDemo/AServer/CServant.tars
deleted file mode 100644
index d8dd8ad..0000000
--- a/examples/PromiseDemo/AServer/CServant.tars
+++ /dev/null
@@ -1,25 +0,0 @@
-/**
- * Tencent is pleased to support the open source community by making Tars available.
- *
- * Copyright (C) 2016THL A29 Limited, a Tencent company. All rights reserved.
- *
- * Licensed under the BSD 3-Clause License (the "License"); you may not use this file except 
- * in compliance with the License. You may obtain a copy of the License at
- *
- * https://opensource.org/licenses/BSD-3-Clause
- *
- * Unless required by applicable law or agreed to in writing, software distributed 
- * under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR 
- * CONDITIONS OF ANY KIND, either express or implied. See the License for the 
- * specific language governing permissions and limitations under the License.
- */
-
-module Test
-{
-
-interface CServant
-{
-    int queryResult(string sIn, out string sOut);
-};
-
-}; 
diff --git a/examples/PromiseDemo/BServer/CMakeLists.txt b/examples/PromiseDemo/BServer/CMakeLists.txt
deleted file mode 100644
index c1f2b64..0000000
--- a/examples/PromiseDemo/BServer/CMakeLists.txt
+++ /dev/null
@@ -1 +0,0 @@
-build_tars_server("PromiseDemoBServer")
\ No newline at end of file
diff --git a/examples/PromiseDemo/BServer/makefile b/examples/PromiseDemo/BServer/makefile
deleted file mode 100644
index 156f400..0000000
--- a/examples/PromiseDemo/BServer/makefile
+++ /dev/null
@@ -1,11 +0,0 @@
-#-----------------------------------------------------------------------
-
-APP       := Test
-TARGET    := BServer
-CONFIG    := 
-STRIP_FLAG:= N
-INCLUDE   +=
-
-#-----------------------------------------------------------------------
-include /usr/local/tars/cpp/makefile/makefile.tars
-#-----------------------------------------------------------------------
diff --git a/examples/PromiseDemo/CMakeLists.txt b/examples/PromiseDemo/CMakeLists.txt
deleted file mode 100644
index f506e86..0000000
--- a/examples/PromiseDemo/CMakeLists.txt
+++ /dev/null
@@ -1,6 +0,0 @@
-
-add_subdirectory(AServer)
-add_subdirectory(BServer)
-add_subdirectory(CServer)
-add_subdirectory(Client)
-
diff --git a/examples/PromiseDemo/CServer/CMakeLists.txt b/examples/PromiseDemo/CServer/CMakeLists.txt
deleted file mode 100644
index 73f1745..0000000
--- a/examples/PromiseDemo/CServer/CMakeLists.txt
+++ /dev/null
@@ -1 +0,0 @@
-build_tars_server("PromiseDemoCServer")
\ No newline at end of file
diff --git a/examples/PromiseDemo/CServer/CServantImp.cpp b/examples/PromiseDemo/CServer/CServantImp.cpp
deleted file mode 100644
index 7e55a9f..0000000
--- a/examples/PromiseDemo/CServer/CServantImp.cpp
+++ /dev/null
@@ -1,45 +0,0 @@
-/**
- * Tencent is pleased to support the open source community by making Tars available.
- *
- * Copyright (C) 2016THL A29 Limited, a Tencent company. All rights reserved.
- *
- * Licensed under the BSD 3-Clause License (the "License"); you may not use this file except 
- * in compliance with the License. You may obtain a copy of the License at
- *
- * https://opensource.org/licenses/BSD-3-Clause
- *
- * Unless required by applicable law or agreed to in writing, software distributed 
- * under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR 
- * CONDITIONS OF ANY KIND, either express or implied. See the License for the 
- * specific language governing permissions and limitations under the License.
- */
-
-#include "CServantImp.h"
-#include "CServer.h"
-#include "servant/Application.h"
-#include "servant/Communicator.h"
-
-using namespace std;
-using namespace tars;
-
-//////////////////////////////////////////////////////
-void CServantImp::initialize()
-{
-    //initialize servant here:
-    //...
-}
-//////////////////////////////////////////////////////
-void CServantImp::destroy()
-{
-}
-//////////////////////////////////////////////////////
-tars::Int32 CServantImp::queryResult(const std::string& sIn, std::string &sOut, tars::TarsCurrentPtr current)
-{
-    sOut = "[sResult:";
-    sOut += sIn;
-    sOut += "]";
-
-    return 0;
-}
-
-
diff --git a/examples/PromiseDemo/CServer/CServer.h b/examples/PromiseDemo/CServer/CServer.h
deleted file mode 100644
index 79cb745..0000000
--- a/examples/PromiseDemo/CServer/CServer.h
+++ /dev/null
@@ -1,53 +0,0 @@
-/**
- * Tencent is pleased to support the open source community by making Tars available.
- *
- * Copyright (C) 2016THL A29 Limited, a Tencent company. All rights reserved.
- *
- * Licensed under the BSD 3-Clause License (the "License"); you may not use this file except 
- * in compliance with the License. You may obtain a copy of the License at
- *
- * https://opensource.org/licenses/BSD-3-Clause
- *
- * Unless required by applicable law or agreed to in writing, software distributed 
- * under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR 
- * CONDITIONS OF ANY KIND, either express or implied. See the License for the 
- * specific language governing permissions and limitations under the License.
- */
-
-#ifndef _BServer_H_
-#define _BServer_H_
-
-#include <iostream>
-#include "servant/Application.h"
-
-using namespace tars;
-
-/**
- *  *
- *   **/
-class CServer : public Application
-{
-public:
-    /**
-     *
-     **/
-    virtual ~CServer() {};
-
-    /**
-     *
-     **/
-    virtual void initialize();
-
-    /**
-     *
-     **/
-    virtual void destroyApp();
-protected:
-    bool cmdprofile(const string& command, const string& params, string& result);
-};
-
-extern CServer g_app;
-
-////////////////////////////////////////////
-#endif
-
diff --git a/examples/PromiseDemo/CServer/makefile b/examples/PromiseDemo/CServer/makefile
deleted file mode 100644
index 303c3f3..0000000
--- a/examples/PromiseDemo/CServer/makefile
+++ /dev/null
@@ -1,11 +0,0 @@
-#-----------------------------------------------------------------------
-APP       := Test
-TARGET    := CServer
-CONFIG    := 
-STRIP_FLAG:= N 
-
-INCLUDE   +=
-
-#-----------------------------------------------------------------------
-include /usr/local/tars/cpp/makefile/makefile.tars
-#-----------------------------------------------------------------------
diff --git a/examples/PromiseDemo/Client/CMakeLists.txt b/examples/PromiseDemo/Client/CMakeLists.txt
deleted file mode 100644
index d3caea6..0000000
--- a/examples/PromiseDemo/Client/CMakeLists.txt
+++ /dev/null
@@ -1 +0,0 @@
-build_tars_server("PromiseDemoClient")
\ No newline at end of file
diff --git a/examples/PromiseDemo/Client/main.cpp b/examples/PromiseDemo/Client/main.cpp
deleted file mode 100644
index 83ca95f..0000000
--- a/examples/PromiseDemo/Client/main.cpp
+++ /dev/null
@@ -1,138 +0,0 @@
-/**
- * Tencent is pleased to support the open source community by making Tars available.
- *
- * Copyright (C) 2016THL A29 Limited, a Tencent company. All rights reserved.
- *
- * Licensed under the BSD 3-Clause License (the "License"); you may not use this file except 
- * in compliance with the License. You may obtain a copy of the License at
- *
- * https://opensource.org/licenses/BSD-3-Clause
- *
- * Unless required by applicable law or agreed to in writing, software distributed 
- * under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR 
- * CONDITIONS OF ANY KIND, either express or implied. See the License for the 
- * specific language governing permissions and limitations under the License.
- */
-
-#include "AServant.h"
-#include "servant/Communicator.h"
-#include "util/tc_thread_pool.h"
-#include <iostream>
-
-using namespace std;
-using namespace Test;
-using namespace tars;
-
-class Test1
-{
-public:
-    Test1(const string &sStr);
-
-    ~Test1();
-
-    void  queryResult(int iFlag, int iExecuteNum);
-
-private:
-    Communicator    _comm;
-    AServantPrx        prx;
-};
-
-Test1::Test1(const string &sStr)
-{
-    _comm.setProperty("locator", "tars.tarsregistry.QueryObj@    tcp -h 10.208.139.242 -p 17890 -t 10000 ");
-    _comm.stringToProxy(sStr, prx);
-}
-
-Test1::~Test1()
-{
-    
-}
-
-void Test1::queryResult(int iFlag, int iExecuteNum)
-{
-    string sIn(10,'a');
-    string sOut("");
-
-    tars::Int32 count = 0;
-    unsigned long sum = 0;
-
-    time_t _iTime=TC_TimeProvider::getInstance()->getNowMs();
-
-    for(int i=0; i<iExecuteNum; i++) 
-    {
-        sOut = "";
-        try
-        {
-            int ret = -1;
-            if(iFlag == 0)
-            {
-                ret = prx->queryResultSerial(sIn, sOut);
-            }
-            else
-            {
-                ret = prx->queryResultParallel(sIn, sOut);
-            }
-
-            if(ret == 0)
-            {
-                ++sum;
-                ++count;
-                if(count == iExecuteNum)
-                {
-                    cout << "pthread id: " << pthread_self() << " | " << TC_TimeProvider::getInstance()->getNowMs() - _iTime << endl;
-                    _iTime=TC_TimeProvider::getInstance()->getNowMs();
-                    count = 0;
-                }
-            }
-        }
-        catch(TC_Exception &e)
-        {
-            cout << "pthread id: " << pthread_self() << "id: " << i << "exception: " << e.what() << endl;
-        }
-        catch(...)
-        {
-            cout << "pthread id: " << pthread_self() << "id: " << i << "unknown exception." << endl;
-        }
-    }
-    cout << "succ:" << sum << endl;
-    cout << "sOut:" << sOut << endl;
-}
-
-int main(int argc,char ** argv)
-{
-    if(argc != 5)
-    {
-        cout << "usage: " << argv[0] << " sObj ThreadNum CallTimes  CallMode" << endl;
-        return -1;
-    }
-
-    string s = string(argv[1]);
-
-    Test1 test1(s);
-    try
-    {
-        tars::Int32 threads = TC_Common::strto<tars::Int32>(string(argv[2]));
-        TC_ThreadPool tp;
-        tp.init(threads);
-        tp.start();
-        tars::Int32 times = TC_Common::strto<tars::Int32>(string(argv[3]));
-        tars::Int32 callMode = TC_Common::strto<tars::Int32>(string(argv[4]));
-        
-        for(int i = 0; i<threads; i++) 
-        {
-            auto fw = std::bind(&Test1::queryResult, &test1, callMode, times);
-            tp.exec(fw);
-            cout << "********************" <<endl;
-        }
-        tp.waitForAllDone(); 
-    }catch(exception &e)
-    {
-        cout<<e.what()<<endl;
-    }
-    catch(...)
-    {
-        
-    }
-    
-    return 0;
-}
diff --git a/examples/PromiseDemo/README.md b/examples/PromiseDemo/README.md
deleted file mode 100644
index ce369e7..0000000
--- a/examples/PromiseDemo/README.md
+++ /dev/null
@@ -1,6 +0,0 @@
-该工程是Tars promise编程示例的代码
-
-
-目录名称 |功能
------------------|----------------
-AServer   |   promise编程的示例程序，用promsie方式去并行和串行访问BServer和CServer
diff --git a/examples/QuickStartDemo/HelloServer/Client/main.cpp b/examples/QuickStartDemo/HelloServer/Client/main.cpp
index 158ffa1..85ebe07 100644
--- a/examples/QuickStartDemo/HelloServer/Client/main.cpp
+++ b/examples/QuickStartDemo/HelloServer/Client/main.cpp
@@ -29,7 +29,7 @@ int main(int argc,char ** argv)
     try
     {
         HelloPrx prx;
-        comm.stringToProxy("TestApp.HelloServer.HelloObj@tcp -h 10.120.129.226 -p 20001" , prx);
+        comm.stringToProxy("TestApp.HelloServer.HelloObj@tcp -h 127.0.0.1 -p 8999" , prx);
 
         try
         {
diff --git a/examples/QuickStartDemo/HelloServer/Server/Hello.h b/examples/QuickStartDemo/HelloServer/Server/Hello.h
new file mode 100644
index 0000000..2e2d362
--- /dev/null
+++ b/examples/QuickStartDemo/HelloServer/Server/Hello.h
@@ -0,0 +1,471 @@
+// **********************************************************************
+// This file was generated by a TARS parser!
+// TARS version 1.4.0.
+// **********************************************************************
+
+#ifndef __HELLO_H_
+#define __HELLO_H_
+
+#include <map>
+#include <string>
+#include <vector>
+#include "tup/Tars.h"
+#include "tup/TarsJson.h"
+using namespace std;
+#include "servant/ServantProxy.h"
+#include "servant/Servant.h"
+
+
+namespace TestApp
+{
+
+    /* callback of async proxy for client */
+    class HelloPrxCallback: public tars::ServantProxyCallback
+    {
+    public:
+        virtual ~HelloPrxCallback(){}
+        virtual void callback_test(tars::Int32 ret)
+        { throw std::runtime_error("callback_test() override incorrect."); }
+        virtual void callback_test_exception(tars::Int32 ret)
+        { throw std::runtime_error("callback_test_exception() override incorrect."); }
+
+        virtual void callback_testHello(tars::Int32 ret,  const std::string& sRsp)
+        { throw std::runtime_error("callback_testHello() override incorrect."); }
+        virtual void callback_testHello_exception(tars::Int32 ret)
+        { throw std::runtime_error("callback_testHello_exception() override incorrect."); }
+
+    public:
+        virtual const map<std::string, std::string> & getResponseContext() const
+        {
+            CallbackThreadData * pCbtd = CallbackThreadData::getData();
+            assert(pCbtd != NULL);
+
+            if(!pCbtd->getContextValid())
+            {
+                throw TC_Exception("cann't get response context");
+            }
+            return pCbtd->getResponseContext();
+        }
+
+    public:
+        virtual int onDispatch(tars::ReqMessagePtr msg)
+        {
+            static ::std::string __Hello_all[]=
+            {
+                "test",
+                "testHello"
+            };
+            pair<string*, string*> r = equal_range(__Hello_all, __Hello_all+2, string(msg->request.sFuncName));
+            if(r.first == r.second) return tars::TARSSERVERNOFUNCERR;
+            switch(r.first - __Hello_all)
+            {
+                case 0:
+                {
+                    if (msg->response->iRet != tars::TARSSERVERSUCCESS)
+                    {
+                        callback_test_exception(msg->response->iRet);
+
+                        return msg->response->iRet;
+                    }
+                    tars::TarsInputStream<tars::BufferReader> _is;
+
+                    _is.setBuffer(msg->response->sBuffer);
+                    tars::Int32 _ret;
+                    _is.read(_ret, 0, true);
+
+                    CallbackThreadData * pCbtd = CallbackThreadData::getData();
+                    assert(pCbtd != NULL);
+
+                    pCbtd->setResponseContext(msg->response->context);
+
+                    callback_test(_ret);
+
+                    pCbtd->delResponseContext();
+
+                    return tars::TARSSERVERSUCCESS;
+
+                }
+                case 1:
+                {
+                    if (msg->response->iRet != tars::TARSSERVERSUCCESS)
+                    {
+                        callback_testHello_exception(msg->response->iRet);
+
+                        return msg->response->iRet;
+                    }
+                    tars::TarsInputStream<tars::BufferReader> _is;
+
+                    _is.setBuffer(msg->response->sBuffer);
+                    tars::Int32 _ret;
+                    _is.read(_ret, 0, true);
+
+                    std::string sRsp;
+                    _is.read(sRsp, 2, true);
+                    CallbackThreadData * pCbtd = CallbackThreadData::getData();
+                    assert(pCbtd != NULL);
+
+                    pCbtd->setResponseContext(msg->response->context);
+
+                    callback_testHello(_ret, sRsp);
+
+                    pCbtd->delResponseContext();
+
+                    return tars::TARSSERVERSUCCESS;
+
+                }
+            }
+            return tars::TARSSERVERNOFUNCERR;
+        }
+
+    };
+    typedef tars::TC_AutoPtr<HelloPrxCallback> HelloPrxCallbackPtr;
+
+    /* callback of coroutine async proxy for client */
+    class HelloCoroPrxCallback: public HelloPrxCallback
+    {
+    public:
+        virtual ~HelloCoroPrxCallback(){}
+    public:
+        virtual const map<std::string, std::string> & getResponseContext() const { return _mRspContext; }
+
+        virtual void setResponseContext(const map<std::string, std::string> &mContext) { _mRspContext = mContext; }
+
+    public:
+        int onDispatch(tars::ReqMessagePtr msg)
+        {
+            static ::std::string __Hello_all[]=
+            {
+                "test",
+                "testHello"
+            };
+
+            pair<string*, string*> r = equal_range(__Hello_all, __Hello_all+2, string(msg->request.sFuncName));
+            if(r.first == r.second) return tars::TARSSERVERNOFUNCERR;
+            switch(r.first - __Hello_all)
+            {
+                case 0:
+                {
+                    if (msg->response->iRet != tars::TARSSERVERSUCCESS)
+                    {
+                        callback_test_exception(msg->response->iRet);
+
+                        return msg->response->iRet;
+                    }
+                    tars::TarsInputStream<tars::BufferReader> _is;
+
+                    _is.setBuffer(msg->response->sBuffer);
+                    try
+                    {
+                        tars::Int32 _ret;
+                        _is.read(_ret, 0, true);
+
+                        setResponseContext(msg->response->context);
+
+                        callback_test(_ret);
+
+                    }
+                    catch(std::exception &ex)
+                    {
+                        callback_test_exception(tars::TARSCLIENTDECODEERR);
+
+                        return tars::TARSCLIENTDECODEERR;
+                    }
+                    catch(...)
+                    {
+                        callback_test_exception(tars::TARSCLIENTDECODEERR);
+
+                        return tars::TARSCLIENTDECODEERR;
+                    }
+
+                    return tars::TARSSERVERSUCCESS;
+
+                }
+                case 1:
+                {
+                    if (msg->response->iRet != tars::TARSSERVERSUCCESS)
+                    {
+                        callback_testHello_exception(msg->response->iRet);
+
+                        return msg->response->iRet;
+                    }
+                    tars::TarsInputStream<tars::BufferReader> _is;
+
+                    _is.setBuffer(msg->response->sBuffer);
+                    try
+                    {
+                        tars::Int32 _ret;
+                        _is.read(_ret, 0, true);
+
+                        std::string sRsp;
+                        _is.read(sRsp, 2, true);
+                        setResponseContext(msg->response->context);
+
+                        callback_testHello(_ret, sRsp);
+
+                    }
+                    catch(std::exception &ex)
+                    {
+                        callback_testHello_exception(tars::TARSCLIENTDECODEERR);
+
+                        return tars::TARSCLIENTDECODEERR;
+                    }
+                    catch(...)
+                    {
+                        callback_testHello_exception(tars::TARSCLIENTDECODEERR);
+
+                        return tars::TARSCLIENTDECODEERR;
+                    }
+
+                    return tars::TARSSERVERSUCCESS;
+
+                }
+            }
+            return tars::TARSSERVERNOFUNCERR;
+        }
+
+    protected:
+        map<std::string, std::string> _mRspContext;
+    };
+    typedef tars::TC_AutoPtr<HelloCoroPrxCallback> HelloCoroPrxCallbackPtr;
+
+    /* proxy for client */
+    class HelloProxy : public tars::ServantProxy
+    {
+    public:
+        typedef map<string, string> TARS_CONTEXT;
+        tars::Int32 test(const map<string, string> &context = TARS_CONTEXT(),map<string, string> * pResponseContext = NULL)
+        {
+            tars::TarsOutputStream<tars::BufferWriterVector> _os;
+            std::map<string, string> _mStatus;
+            shared_ptr<tars::ResponsePacket> rep = tars_invoke(tars::TARSNORMAL,"test", _os, context, _mStatus);
+            if(pResponseContext)
+            {
+                pResponseContext->swap(rep->context);
+            }
+
+            tars::TarsInputStream<tars::BufferReader> _is;
+            _is.setBuffer(rep->sBuffer);
+            tars::Int32 _ret;
+            _is.read(_ret, 0, true);
+            return _ret;
+        }
+
+        void async_test(HelloPrxCallbackPtr callback,const map<string, string>& context = TARS_CONTEXT())
+        {
+            tars::TarsOutputStream<tars::BufferWriterVector> _os;
+            std::map<string, string> _mStatus;
+            tars_invoke_async(tars::TARSNORMAL,"test", _os, context, _mStatus, callback);
+        }
+        
+        void coro_test(HelloCoroPrxCallbackPtr callback,const map<string, string>& context = TARS_CONTEXT())
+        {
+            tars::TarsOutputStream<tars::BufferWriterVector> _os;
+            std::map<string, string> _mStatus;
+            tars_invoke_async(tars::TARSNORMAL,"test", _os, context, _mStatus, callback);
+        }
+
+        tars::Int32 testHello(const std::string & sReq,std::string &sRsp,const map<string, string> &context = TARS_CONTEXT(),map<string, string> * pResponseContext = NULL)
+        {
+            tars::TarsOutputStream<tars::BufferWriterVector> _os;
+            _os.write(sReq, 1);
+            _os.write(sRsp, 2);
+            std::map<string, string> _mStatus;
+            shared_ptr<tars::ResponsePacket> rep = tars_invoke(tars::TARSNORMAL,"testHello", _os, context, _mStatus);
+            if(pResponseContext)
+            {
+                pResponseContext->swap(rep->context);
+            }
+
+            tars::TarsInputStream<tars::BufferReader> _is;
+            _is.setBuffer(rep->sBuffer);
+            tars::Int32 _ret;
+            _is.read(_ret, 0, true);
+            _is.read(sRsp, 2, true);
+            return _ret;
+        }
+
+        void async_testHello(HelloPrxCallbackPtr callback,const std::string &sReq,const map<string, string>& context = TARS_CONTEXT())
+        {
+            tars::TarsOutputStream<tars::BufferWriterVector> _os;
+            _os.write(sReq, 1);
+            std::map<string, string> _mStatus;
+            tars_invoke_async(tars::TARSNORMAL,"testHello", _os, context, _mStatus, callback);
+        }
+        
+        void coro_testHello(HelloCoroPrxCallbackPtr callback,const std::string &sReq,const map<string, string>& context = TARS_CONTEXT())
+        {
+            tars::TarsOutputStream<tars::BufferWriterVector> _os;
+            _os.write(sReq, 1);
+            std::map<string, string> _mStatus;
+            tars_invoke_async(tars::TARSNORMAL,"testHello", _os, context, _mStatus, callback);
+        }
+
+        HelloProxy* tars_hash(int64_t key)
+        {
+            return (HelloProxy*)ServantProxy::tars_hash(key);
+        }
+
+        HelloProxy* tars_consistent_hash(int64_t key)
+        {
+            return (HelloProxy*)ServantProxy::tars_consistent_hash(key);
+        }
+
+        HelloProxy* tars_set_timeout(int msecond)
+        {
+            return (HelloProxy*)ServantProxy::tars_set_timeout(msecond);
+        }
+
+        static const char* tars_prxname() { return "HelloProxy"; }
+    };
+    typedef tars::TC_AutoPtr<HelloProxy> HelloPrx;
+
+    /* servant for server */
+    class Hello : public tars::Servant
+    {
+    public:
+        virtual ~Hello(){}
+        virtual tars::Int32 test(tars::TarsCurrentPtr current) = 0;
+        static void async_response_test(tars::TarsCurrentPtr current, tars::Int32 _ret)
+        {
+            if (current->getRequestVersion() == TUPVERSION )
+            {
+                UniAttribute<tars::BufferWriterVector, tars::BufferReader>  tarsAttr;
+                tarsAttr.setVersion(current->getRequestVersion());
+                tarsAttr.put("", _ret);
+
+                vector<char> sTupResponseBuffer;
+                tarsAttr.encode(sTupResponseBuffer);
+                current->sendResponse(tars::TARSSERVERSUCCESS, sTupResponseBuffer);
+            }
+            else
+            {
+                tars::TarsOutputStream<tars::BufferWriterVector> _os;
+                _os.write(_ret, 0);
+
+                current->sendResponse(tars::TARSSERVERSUCCESS, _os.getByteBuffer());
+            }
+        }
+
+        virtual tars::Int32 testHello(const std::string & sReq,std::string &sRsp,tars::TarsCurrentPtr current) = 0;
+        static void async_response_testHello(tars::TarsCurrentPtr current, tars::Int32 _ret, const std::string &sRsp)
+        {
+            if (current->getRequestVersion() == TUPVERSION )
+            {
+                UniAttribute<tars::BufferWriterVector, tars::BufferReader>  tarsAttr;
+                tarsAttr.setVersion(current->getRequestVersion());
+                tarsAttr.put("", _ret);
+                tarsAttr.put("sRsp", sRsp);
+
+                vector<char> sTupResponseBuffer;
+                tarsAttr.encode(sTupResponseBuffer);
+                current->sendResponse(tars::TARSSERVERSUCCESS, sTupResponseBuffer);
+            }
+            else
+            {
+                tars::TarsOutputStream<tars::BufferWriterVector> _os;
+                _os.write(_ret, 0);
+
+                _os.write(sRsp, 2);
+
+                current->sendResponse(tars::TARSSERVERSUCCESS, _os.getByteBuffer());
+            }
+        }
+
+    public:
+        int onDispatch(tars::TarsCurrentPtr _current, vector<char> &_sResponseBuffer)
+        {
+            static ::std::string __TestApp__Hello_all[]=
+            {
+                "test",
+                "testHello"
+            };
+
+            pair<string*, string*> r = equal_range(__TestApp__Hello_all, __TestApp__Hello_all+2, _current->getFuncName());
+            if(r.first == r.second) return tars::TARSSERVERNOFUNCERR;
+            switch(r.first - __TestApp__Hello_all)
+            {
+                case 0:
+                {
+                    tars::TarsInputStream<tars::BufferReader> _is;
+                    _is.setBuffer(_current->getRequestBuffer());
+                    if (_current->getRequestVersion() == TUPVERSION)
+                    {
+                        UniAttribute<tars::BufferWriterVector, tars::BufferReader>  tarsAttr;
+                        tarsAttr.setVersion(_current->getRequestVersion());
+                        tarsAttr.decode(_current->getRequestBuffer());
+                    }
+                    else
+                    {
+                    }
+                    tars::Int32 _ret = test(_current);
+                    if(_current->isResponse())
+                    {
+                        if (_current->getRequestVersion() == TUPVERSION )
+                        {
+                            UniAttribute<tars::BufferWriterVector, tars::BufferReader>  tarsAttr;
+                            tarsAttr.setVersion(_current->getRequestVersion());
+                            tarsAttr.put("", _ret);
+                            tarsAttr.encode(_sResponseBuffer);
+                        }
+                        else
+                        {
+                            tars::TarsOutputStream<tars::BufferWriterVector> _os;
+                            _os.write(_ret, 0);
+                            _os.swap(_sResponseBuffer);
+                        }
+                    }
+                    return tars::TARSSERVERSUCCESS;
+
+                }
+                case 1:
+                {
+                    tars::TarsInputStream<tars::BufferReader> _is;
+                    _is.setBuffer(_current->getRequestBuffer());
+                    std::string sReq;
+                    std::string sRsp;
+                    if (_current->getRequestVersion() == TUPVERSION)
+                    {
+                        UniAttribute<tars::BufferWriterVector, tars::BufferReader>  tarsAttr;
+                        tarsAttr.setVersion(_current->getRequestVersion());
+                        tarsAttr.decode(_current->getRequestBuffer());
+                        tarsAttr.get("sReq", sReq);
+                        tarsAttr.getByDefault("sRsp", sRsp, sRsp);
+                    }
+                    else
+                    {
+                        _is.read(sReq, 1, true);
+                        _is.read(sRsp, 2, false);
+                    }
+                    tars::Int32 _ret = testHello(sReq,sRsp, _current);
+                    if(_current->isResponse())
+                    {
+                        if (_current->getRequestVersion() == TUPVERSION )
+                        {
+                            UniAttribute<tars::BufferWriterVector, tars::BufferReader>  tarsAttr;
+                            tarsAttr.setVersion(_current->getRequestVersion());
+                            tarsAttr.put("", _ret);
+                            tarsAttr.put("sRsp", sRsp);
+                            tarsAttr.encode(_sResponseBuffer);
+                        }
+                        else
+                        {
+                            tars::TarsOutputStream<tars::BufferWriterVector> _os;
+                            _os.write(_ret, 0);
+                            _os.write(sRsp, 2);
+                            _os.swap(_sResponseBuffer);
+                        }
+                    }
+                    return tars::TARSSERVERSUCCESS;
+
+                }
+            }
+            return tars::TARSSERVERNOFUNCERR;
+        }
+    };
+
+
+}
+
+
+
+#endif
diff --git a/examples/PromiseDemo/CServer/CServant.tars b/examples/QuickStartDemo/HelloServer/Server/Hello.tars
similarity index 88%
rename from examples/PromiseDemo/CServer/CServant.tars
rename to examples/QuickStartDemo/HelloServer/Server/Hello.tars
index d8dd8ad..174c4f3 100644
--- a/examples/PromiseDemo/CServer/CServant.tars
+++ b/examples/QuickStartDemo/HelloServer/Server/Hello.tars
@@ -14,12 +14,13 @@
  * specific language governing permissions and limitations under the License.
  */
 
-module Test
+module TestApp
 {
 
-interface CServant
+interface Hello
 {
-    int queryResult(string sIn, out string sOut);
+    int test();
+    int testHello(string sReq, out string sRsp);
 };
 
 }; 
diff --git a/examples/PromiseDemo/BServer/BServantImp.cpp b/examples/QuickStartDemo/HelloServer/Server/HelloImp.cpp
similarity index 71%
rename from examples/PromiseDemo/BServer/BServantImp.cpp
rename to examples/QuickStartDemo/HelloServer/Server/HelloImp.cpp
index ffa2ecc..b0985dc 100644
--- a/examples/PromiseDemo/BServer/BServantImp.cpp
+++ b/examples/QuickStartDemo/HelloServer/Server/HelloImp.cpp
@@ -14,32 +14,29 @@
  * specific language governing permissions and limitations under the License.
  */
 
-#include "BServantImp.h"
-#include "BServer.h"
+#include "HelloImp.h"
 #include "servant/Application.h"
-#include "servant/Communicator.h"
 
 using namespace std;
-using namespace tars;
 
 //////////////////////////////////////////////////////
-void BServantImp::initialize()
+void HelloImp::initialize()
 {
     //initialize servant here:
     //...
 }
-//////////////////////////////////////////////////////
-void BServantImp::destroy()
-{
-}
-//////////////////////////////////////////////////////
-tars::Int32 BServantImp::queryResult(const std::string& sIn, std::string &sOut, tars::TarsCurrentPtr current)
-{
-    sOut = "[sResult:";
-    sOut += sIn;
-    sOut += "]";
 
+//////////////////////////////////////////////////////
+void HelloImp::destroy()
+{
+    //destroy servant here:
+    //...
+}
+
+int HelloImp::testHello(const std::string &sReq, std::string &sRsp, tars::TarsCurrentPtr current)
+{
+    TLOGDEBUG("HelloImp::testHellosReq:"<<sReq<<endl);
+    sRsp = sReq;
     return 0;
 }
 
-
diff --git a/examples/PromiseDemo/CServer/CServantImp.h b/examples/QuickStartDemo/HelloServer/Server/HelloImp.h
similarity index 69%
rename from examples/PromiseDemo/CServer/CServantImp.h
rename to examples/QuickStartDemo/HelloServer/Server/HelloImp.h
index 1191b56..5513684 100644
--- a/examples/PromiseDemo/CServer/CServantImp.h
+++ b/examples/QuickStartDemo/HelloServer/Server/HelloImp.h
@@ -14,27 +14,40 @@
  * specific language governing permissions and limitations under the License.
  */
 
-#ifndef _BServantImp_H_
-#define _BServantImp_H_
+#ifndef _HelloImp_H_
+#define _HelloImp_H_
 
 #include "servant/Application.h"
-#include "CServant.h"
-#include "promise/promise.h"
+#include "Hello.h"
 
-using namespace Test;
-
-class CServantImp : public Test::CServant
+/**
+ *
+ *
+ */
+class HelloImp : public TestApp::Hello
 {
 public:
+    /**
+     *
+     */
+    virtual ~HelloImp() {}
 
-    virtual ~CServantImp() {}
-
+    /**
+     *
+     */
     virtual void initialize();
 
+    /**
+     *
+     */
     virtual void destroy();
 
-    tars::Int32 queryResult(const std::string& sIn, std::string &sOut, tars::TarsCurrentPtr current);
+    /**
+     *
+     */
+    virtual int test(tars::TarsCurrentPtr current) { return 0;};
 
+    virtual int testHello(const std::string &sReq, std::string &sRsp, tars::TarsCurrentPtr current);
 };
 /////////////////////////////////////////////////////
 #endif
diff --git a/examples/PromiseDemo/CServer/CServer.cpp b/examples/QuickStartDemo/HelloServer/Server/HelloServer.cpp
similarity index 83%
rename from examples/PromiseDemo/CServer/CServer.cpp
rename to examples/QuickStartDemo/HelloServer/Server/HelloServer.cpp
index 9d8827b..d9ec8ee 100644
--- a/examples/PromiseDemo/CServer/CServer.cpp
+++ b/examples/QuickStartDemo/HelloServer/Server/HelloServer.cpp
@@ -14,30 +14,32 @@
  * specific language governing permissions and limitations under the License.
  */
 
-#include "CServer.h"
-#include "CServantImp.h"
+#include "HelloServer.h"
+#include "HelloImp.h"
 
 using namespace std;
 
-CServer g_app;
+HelloServer g_app;
 
 /////////////////////////////////////////////////////////////////
-void CServer::initialize()
+void
+HelloServer::initialize()
 {
     //initialize application here:
-    //... 
+    //...
 
-    addServant<CServantImp>(ServerConfig::Application + "." + ServerConfig::ServerName + ".CServantObj");
+    addServant<HelloImp>(ServerConfig::Application + "." + ServerConfig::ServerName + ".HelloObj");
 }
 /////////////////////////////////////////////////////////////////
-void CServer::destroyApp()
+void
+HelloServer::destroyApp()
 {
     //destroy application here:
     //...
 }
-
 /////////////////////////////////////////////////////////////////
-int main(int argc, char* argv[])
+int
+main(int argc, char* argv[])
 {
     try
     {
diff --git a/examples/PromiseDemo/BServer/BServer.h b/examples/QuickStartDemo/HelloServer/Server/HelloServer.h
similarity index 82%
rename from examples/PromiseDemo/BServer/BServer.h
rename to examples/QuickStartDemo/HelloServer/Server/HelloServer.h
index 7038cd8..f35886b 100644
--- a/examples/PromiseDemo/BServer/BServer.h
+++ b/examples/QuickStartDemo/HelloServer/Server/HelloServer.h
@@ -14,8 +14,8 @@
  * specific language governing permissions and limitations under the License.
  */
 
-#ifndef _BServer_H_
-#define _BServer_H_
+#ifndef _HelloServer_H_
+#define _HelloServer_H_
 
 #include <iostream>
 #include "servant/Application.h"
@@ -25,13 +25,13 @@ using namespace tars;
 /**
  *
  **/
-class BServer : public Application
+class HelloServer : public Application
 {
 public:
     /**
      *
      **/
-    virtual ~BServer() {};
+    virtual ~HelloServer() {};
 
     /**
      *
@@ -42,11 +42,9 @@ public:
      *
      **/
     virtual void destroyApp();
-protected:
-    bool cmdprofile(const string& command, const string& params, string& result);
 };
 
-extern BServer g_app;
+extern HelloServer g_app;
 
 ////////////////////////////////////////////
 #endif
diff --git a/examples/QuickStartDemo/HelloServer/Server/config.conf b/examples/QuickStartDemo/HelloServer/Server/config.conf
new file mode 100755
index 0000000..30b96f3
--- /dev/null
+++ b/examples/QuickStartDemo/HelloServer/Server/config.conf
@@ -0,0 +1,70 @@
+<tars>
+  <application>
+    <client>
+        #tarsregistry locator
+        locator                     = tars.tarsregistry.QueryObj@tcp -h 127.0.0.1 -p 17890
+        #max invoke timeout
+        max-invoke-timeout          = 5000
+        #refresh endpoint interval
+        refresh-endpoint-interval   = 10000
+        #stat obj
+        stat                        = tars.tarsstat.StatObj
+        #max send queue length limit
+        sendqueuelimit              = 100000
+        #async queue length limit
+        asyncqueuecap               = 100000
+        #async callback thread num
+        asyncthread                 = 3
+        #net thread
+        netthread                   = 1
+        #merge net and sync thread
+        mergenetasync               = 0
+        #module name
+        modulename                  = TestApp.HelloServer
+    </client>
+            
+    <server>
+        #not cout
+        closecout = 0
+        #app name
+        app      = TestApp
+        #server name
+        server   = HelloServer
+        #path
+        basepath = ./
+        datapath = ./
+        #log path
+        logpath  = ./
+        #merge net and imp thread
+        mergenetimp = 0
+        #local ip, for tarsnode
+#        local   = tcp -h 127.0.0.1 -p 15001 -t 10000
+
+        #tarsnode
+#        node    = ServerObj@tcp -h 127.0.0.1 -p 2345 -t 10000
+        #config obj
+#        config  = tars.tarsconfig.ConfigObj
+        #notify obj
+#	      notify  = tars.tarsconfig.NotifyObj
+        #log obj
+#       log     = tars.tarslog.LogObj
+
+        <HelloAdapter>
+            #ip:port:timeout
+            endpoint = tcp -h 127.0.0.1 -p 8999 -t 10000
+            #allow ip
+            allow	 =
+            #max connection num
+            maxconns = 4096
+            #imp thread num
+            threads	 = 5
+            #servant
+            servant = TestApp.HelloServer.HelloObj
+            #queue capacity
+            queuecap = 1000000
+            #tars protocol
+	          protocol = tars
+        </HelloAdapter>
+    </server>
+  </application>
+</tars>
diff --git a/examples/PromiseDemo/AServer/makefile b/examples/QuickStartDemo/HelloServer/Server/makefile
similarity index 79%
rename from examples/PromiseDemo/AServer/makefile
rename to examples/QuickStartDemo/HelloServer/Server/makefile
index 9922db3..56961c4 100644
--- a/examples/PromiseDemo/AServer/makefile
+++ b/examples/QuickStartDemo/HelloServer/Server/makefile
@@ -1,12 +1,16 @@
 
 #-----------------------------------------------------------------------
-APP       := Test
-TARGET    := AServer
+
+APP       := TestApp
+TARGET    := HelloServer
 CONFIG    := 
 STRIP_FLAG:= N
 
-INCLUDE   +=
+INCLUDE   += 
+LIB       += 
 
 #-----------------------------------------------------------------------
+
 include /usr/local/tars/cpp/makefile/makefile.tars
+
 #-----------------------------------------------------------------------
diff --git a/examples/QuickStartDemo/ProxyServer/Server/Proxy.h b/examples/QuickStartDemo/ProxyServer/Server/Proxy.h
new file mode 100644
index 0000000..4bce919
--- /dev/null
+++ b/examples/QuickStartDemo/ProxyServer/Server/Proxy.h
@@ -0,0 +1,471 @@
+// **********************************************************************
+// This file was generated by a TARS parser!
+// TARS version 1.4.0.
+// **********************************************************************
+
+#ifndef __PROXY_H_
+#define __PROXY_H_
+
+#include <map>
+#include <string>
+#include <vector>
+#include "tup/Tars.h"
+#include "tup/TarsJson.h"
+using namespace std;
+#include "servant/ServantProxy.h"
+#include "servant/Servant.h"
+
+
+namespace TestApp
+{
+
+    /* callback of async proxy for client */
+    class ProxyPrxCallback: public tars::ServantProxyCallback
+    {
+    public:
+        virtual ~ProxyPrxCallback(){}
+        virtual void callback_test(tars::Int32 ret)
+        { throw std::runtime_error("callback_test() override incorrect."); }
+        virtual void callback_test_exception(tars::Int32 ret)
+        { throw std::runtime_error("callback_test_exception() override incorrect."); }
+
+        virtual void callback_testProxy(tars::Int32 ret,  const std::string& sRsp)
+        { throw std::runtime_error("callback_testProxy() override incorrect."); }
+        virtual void callback_testProxy_exception(tars::Int32 ret)
+        { throw std::runtime_error("callback_testProxy_exception() override incorrect."); }
+
+    public:
+        virtual const map<std::string, std::string> & getResponseContext() const
+        {
+            CallbackThreadData * pCbtd = CallbackThreadData::getData();
+            assert(pCbtd != NULL);
+
+            if(!pCbtd->getContextValid())
+            {
+                throw TC_Exception("cann't get response context");
+            }
+            return pCbtd->getResponseContext();
+        }
+
+    public:
+        virtual int onDispatch(tars::ReqMessagePtr msg)
+        {
+            static ::std::string __Proxy_all[]=
+            {
+                "test",
+                "testProxy"
+            };
+            pair<string*, string*> r = equal_range(__Proxy_all, __Proxy_all+2, string(msg->request.sFuncName));
+            if(r.first == r.second) return tars::TARSSERVERNOFUNCERR;
+            switch(r.first - __Proxy_all)
+            {
+                case 0:
+                {
+                    if (msg->response->iRet != tars::TARSSERVERSUCCESS)
+                    {
+                        callback_test_exception(msg->response->iRet);
+
+                        return msg->response->iRet;
+                    }
+                    tars::TarsInputStream<tars::BufferReader> _is;
+
+                    _is.setBuffer(msg->response->sBuffer);
+                    tars::Int32 _ret;
+                    _is.read(_ret, 0, true);
+
+                    CallbackThreadData * pCbtd = CallbackThreadData::getData();
+                    assert(pCbtd != NULL);
+
+                    pCbtd->setResponseContext(msg->response->context);
+
+                    callback_test(_ret);
+
+                    pCbtd->delResponseContext();
+
+                    return tars::TARSSERVERSUCCESS;
+
+                }
+                case 1:
+                {
+                    if (msg->response->iRet != tars::TARSSERVERSUCCESS)
+                    {
+                        callback_testProxy_exception(msg->response->iRet);
+
+                        return msg->response->iRet;
+                    }
+                    tars::TarsInputStream<tars::BufferReader> _is;
+
+                    _is.setBuffer(msg->response->sBuffer);
+                    tars::Int32 _ret;
+                    _is.read(_ret, 0, true);
+
+                    std::string sRsp;
+                    _is.read(sRsp, 2, true);
+                    CallbackThreadData * pCbtd = CallbackThreadData::getData();
+                    assert(pCbtd != NULL);
+
+                    pCbtd->setResponseContext(msg->response->context);
+
+                    callback_testProxy(_ret, sRsp);
+
+                    pCbtd->delResponseContext();
+
+                    return tars::TARSSERVERSUCCESS;
+
+                }
+            }
+            return tars::TARSSERVERNOFUNCERR;
+        }
+
+    };
+    typedef tars::TC_AutoPtr<ProxyPrxCallback> ProxyPrxCallbackPtr;
+
+    /* callback of coroutine async proxy for client */
+    class ProxyCoroPrxCallback: public ProxyPrxCallback
+    {
+    public:
+        virtual ~ProxyCoroPrxCallback(){}
+    public:
+        virtual const map<std::string, std::string> & getResponseContext() const { return _mRspContext; }
+
+        virtual void setResponseContext(const map<std::string, std::string> &mContext) { _mRspContext = mContext; }
+
+    public:
+        int onDispatch(tars::ReqMessagePtr msg)
+        {
+            static ::std::string __Proxy_all[]=
+            {
+                "test",
+                "testProxy"
+            };
+
+            pair<string*, string*> r = equal_range(__Proxy_all, __Proxy_all+2, string(msg->request.sFuncName));
+            if(r.first == r.second) return tars::TARSSERVERNOFUNCERR;
+            switch(r.first - __Proxy_all)
+            {
+                case 0:
+                {
+                    if (msg->response->iRet != tars::TARSSERVERSUCCESS)
+                    {
+                        callback_test_exception(msg->response->iRet);
+
+                        return msg->response->iRet;
+                    }
+                    tars::TarsInputStream<tars::BufferReader> _is;
+
+                    _is.setBuffer(msg->response->sBuffer);
+                    try
+                    {
+                        tars::Int32 _ret;
+                        _is.read(_ret, 0, true);
+
+                        setResponseContext(msg->response->context);
+
+                        callback_test(_ret);
+
+                    }
+                    catch(std::exception &ex)
+                    {
+                        callback_test_exception(tars::TARSCLIENTDECODEERR);
+
+                        return tars::TARSCLIENTDECODEERR;
+                    }
+                    catch(...)
+                    {
+                        callback_test_exception(tars::TARSCLIENTDECODEERR);
+
+                        return tars::TARSCLIENTDECODEERR;
+                    }
+
+                    return tars::TARSSERVERSUCCESS;
+
+                }
+                case 1:
+                {
+                    if (msg->response->iRet != tars::TARSSERVERSUCCESS)
+                    {
+                        callback_testProxy_exception(msg->response->iRet);
+
+                        return msg->response->iRet;
+                    }
+                    tars::TarsInputStream<tars::BufferReader> _is;
+
+                    _is.setBuffer(msg->response->sBuffer);
+                    try
+                    {
+                        tars::Int32 _ret;
+                        _is.read(_ret, 0, true);
+
+                        std::string sRsp;
+                        _is.read(sRsp, 2, true);
+                        setResponseContext(msg->response->context);
+
+                        callback_testProxy(_ret, sRsp);
+
+                    }
+                    catch(std::exception &ex)
+                    {
+                        callback_testProxy_exception(tars::TARSCLIENTDECODEERR);
+
+                        return tars::TARSCLIENTDECODEERR;
+                    }
+                    catch(...)
+                    {
+                        callback_testProxy_exception(tars::TARSCLIENTDECODEERR);
+
+                        return tars::TARSCLIENTDECODEERR;
+                    }
+
+                    return tars::TARSSERVERSUCCESS;
+
+                }
+            }
+            return tars::TARSSERVERNOFUNCERR;
+        }
+
+    protected:
+        map<std::string, std::string> _mRspContext;
+    };
+    typedef tars::TC_AutoPtr<ProxyCoroPrxCallback> ProxyCoroPrxCallbackPtr;
+
+    /* proxy for client */
+    class ProxyProxy : public tars::ServantProxy
+    {
+    public:
+        typedef map<string, string> TARS_CONTEXT;
+        tars::Int32 test(const map<string, string> &context = TARS_CONTEXT(),map<string, string> * pResponseContext = NULL)
+        {
+            tars::TarsOutputStream<tars::BufferWriterVector> _os;
+            std::map<string, string> _mStatus;
+            shared_ptr<tars::ResponsePacket> rep = tars_invoke(tars::TARSNORMAL,"test", _os, context, _mStatus);
+            if(pResponseContext)
+            {
+                pResponseContext->swap(rep->context);
+            }
+
+            tars::TarsInputStream<tars::BufferReader> _is;
+            _is.setBuffer(rep->sBuffer);
+            tars::Int32 _ret;
+            _is.read(_ret, 0, true);
+            return _ret;
+        }
+
+        void async_test(ProxyPrxCallbackPtr callback,const map<string, string>& context = TARS_CONTEXT())
+        {
+            tars::TarsOutputStream<tars::BufferWriterVector> _os;
+            std::map<string, string> _mStatus;
+            tars_invoke_async(tars::TARSNORMAL,"test", _os, context, _mStatus, callback);
+        }
+        
+        void coro_test(ProxyCoroPrxCallbackPtr callback,const map<string, string>& context = TARS_CONTEXT())
+        {
+            tars::TarsOutputStream<tars::BufferWriterVector> _os;
+            std::map<string, string> _mStatus;
+            tars_invoke_async(tars::TARSNORMAL,"test", _os, context, _mStatus, callback);
+        }
+
+        tars::Int32 testProxy(const std::string & sReq,std::string &sRsp,const map<string, string> &context = TARS_CONTEXT(),map<string, string> * pResponseContext = NULL)
+        {
+            tars::TarsOutputStream<tars::BufferWriterVector> _os;
+            _os.write(sReq, 1);
+            _os.write(sRsp, 2);
+            std::map<string, string> _mStatus;
+            shared_ptr<tars::ResponsePacket> rep = tars_invoke(tars::TARSNORMAL,"testProxy", _os, context, _mStatus);
+            if(pResponseContext)
+            {
+                pResponseContext->swap(rep->context);
+            }
+
+            tars::TarsInputStream<tars::BufferReader> _is;
+            _is.setBuffer(rep->sBuffer);
+            tars::Int32 _ret;
+            _is.read(_ret, 0, true);
+            _is.read(sRsp, 2, true);
+            return _ret;
+        }
+
+        void async_testProxy(ProxyPrxCallbackPtr callback,const std::string &sReq,const map<string, string>& context = TARS_CONTEXT())
+        {
+            tars::TarsOutputStream<tars::BufferWriterVector> _os;
+            _os.write(sReq, 1);
+            std::map<string, string> _mStatus;
+            tars_invoke_async(tars::TARSNORMAL,"testProxy", _os, context, _mStatus, callback);
+        }
+        
+        void coro_testProxy(ProxyCoroPrxCallbackPtr callback,const std::string &sReq,const map<string, string>& context = TARS_CONTEXT())
+        {
+            tars::TarsOutputStream<tars::BufferWriterVector> _os;
+            _os.write(sReq, 1);
+            std::map<string, string> _mStatus;
+            tars_invoke_async(tars::TARSNORMAL,"testProxy", _os, context, _mStatus, callback);
+        }
+
+        ProxyProxy* tars_hash(int64_t key)
+        {
+            return (ProxyProxy*)ServantProxy::tars_hash(key);
+        }
+
+        ProxyProxy* tars_consistent_hash(int64_t key)
+        {
+            return (ProxyProxy*)ServantProxy::tars_consistent_hash(key);
+        }
+
+        ProxyProxy* tars_set_timeout(int msecond)
+        {
+            return (ProxyProxy*)ServantProxy::tars_set_timeout(msecond);
+        }
+
+        static const char* tars_prxname() { return "ProxyProxy"; }
+    };
+    typedef tars::TC_AutoPtr<ProxyProxy> ProxyPrx;
+
+    /* servant for server */
+    class Proxy : public tars::Servant
+    {
+    public:
+        virtual ~Proxy(){}
+        virtual tars::Int32 test(tars::TarsCurrentPtr current) = 0;
+        static void async_response_test(tars::TarsCurrentPtr current, tars::Int32 _ret)
+        {
+            if (current->getRequestVersion() == TUPVERSION )
+            {
+                UniAttribute<tars::BufferWriterVector, tars::BufferReader>  tarsAttr;
+                tarsAttr.setVersion(current->getRequestVersion());
+                tarsAttr.put("", _ret);
+
+                vector<char> sTupResponseBuffer;
+                tarsAttr.encode(sTupResponseBuffer);
+                current->sendResponse(tars::TARSSERVERSUCCESS, sTupResponseBuffer);
+            }
+            else
+            {
+                tars::TarsOutputStream<tars::BufferWriterVector> _os;
+                _os.write(_ret, 0);
+
+                current->sendResponse(tars::TARSSERVERSUCCESS, _os.getByteBuffer());
+            }
+        }
+
+        virtual tars::Int32 testProxy(const std::string & sReq,std::string &sRsp,tars::TarsCurrentPtr current) = 0;
+        static void async_response_testProxy(tars::TarsCurrentPtr current, tars::Int32 _ret, const std::string &sRsp)
+        {
+            if (current->getRequestVersion() == TUPVERSION )
+            {
+                UniAttribute<tars::BufferWriterVector, tars::BufferReader>  tarsAttr;
+                tarsAttr.setVersion(current->getRequestVersion());
+                tarsAttr.put("", _ret);
+                tarsAttr.put("sRsp", sRsp);
+
+                vector<char> sTupResponseBuffer;
+                tarsAttr.encode(sTupResponseBuffer);
+                current->sendResponse(tars::TARSSERVERSUCCESS, sTupResponseBuffer);
+            }
+            else
+            {
+                tars::TarsOutputStream<tars::BufferWriterVector> _os;
+                _os.write(_ret, 0);
+
+                _os.write(sRsp, 2);
+
+                current->sendResponse(tars::TARSSERVERSUCCESS, _os.getByteBuffer());
+            }
+        }
+
+    public:
+        int onDispatch(tars::TarsCurrentPtr _current, vector<char> &_sResponseBuffer)
+        {
+            static ::std::string __TestApp__Proxy_all[]=
+            {
+                "test",
+                "testProxy"
+            };
+
+            pair<string*, string*> r = equal_range(__TestApp__Proxy_all, __TestApp__Proxy_all+2, _current->getFuncName());
+            if(r.first == r.second) return tars::TARSSERVERNOFUNCERR;
+            switch(r.first - __TestApp__Proxy_all)
+            {
+                case 0:
+                {
+                    tars::TarsInputStream<tars::BufferReader> _is;
+                    _is.setBuffer(_current->getRequestBuffer());
+                    if (_current->getRequestVersion() == TUPVERSION)
+                    {
+                        UniAttribute<tars::BufferWriterVector, tars::BufferReader>  tarsAttr;
+                        tarsAttr.setVersion(_current->getRequestVersion());
+                        tarsAttr.decode(_current->getRequestBuffer());
+                    }
+                    else
+                    {
+                    }
+                    tars::Int32 _ret = test(_current);
+                    if(_current->isResponse())
+                    {
+                        if (_current->getRequestVersion() == TUPVERSION )
+                        {
+                            UniAttribute<tars::BufferWriterVector, tars::BufferReader>  tarsAttr;
+                            tarsAttr.setVersion(_current->getRequestVersion());
+                            tarsAttr.put("", _ret);
+                            tarsAttr.encode(_sResponseBuffer);
+                        }
+                        else
+                        {
+                            tars::TarsOutputStream<tars::BufferWriterVector> _os;
+                            _os.write(_ret, 0);
+                            _os.swap(_sResponseBuffer);
+                        }
+                    }
+                    return tars::TARSSERVERSUCCESS;
+
+                }
+                case 1:
+                {
+                    tars::TarsInputStream<tars::BufferReader> _is;
+                    _is.setBuffer(_current->getRequestBuffer());
+                    std::string sReq;
+                    std::string sRsp;
+                    if (_current->getRequestVersion() == TUPVERSION)
+                    {
+                        UniAttribute<tars::BufferWriterVector, tars::BufferReader>  tarsAttr;
+                        tarsAttr.setVersion(_current->getRequestVersion());
+                        tarsAttr.decode(_current->getRequestBuffer());
+                        tarsAttr.get("sReq", sReq);
+                        tarsAttr.getByDefault("sRsp", sRsp, sRsp);
+                    }
+                    else
+                    {
+                        _is.read(sReq, 1, true);
+                        _is.read(sRsp, 2, false);
+                    }
+                    tars::Int32 _ret = testProxy(sReq,sRsp, _current);
+                    if(_current->isResponse())
+                    {
+                        if (_current->getRequestVersion() == TUPVERSION )
+                        {
+                            UniAttribute<tars::BufferWriterVector, tars::BufferReader>  tarsAttr;
+                            tarsAttr.setVersion(_current->getRequestVersion());
+                            tarsAttr.put("", _ret);
+                            tarsAttr.put("sRsp", sRsp);
+                            tarsAttr.encode(_sResponseBuffer);
+                        }
+                        else
+                        {
+                            tars::TarsOutputStream<tars::BufferWriterVector> _os;
+                            _os.write(_ret, 0);
+                            _os.write(sRsp, 2);
+                            _os.swap(_sResponseBuffer);
+                        }
+                    }
+                    return tars::TARSSERVERSUCCESS;
+
+                }
+            }
+            return tars::TARSSERVERNOFUNCERR;
+        }
+    };
+
+
+}
+
+
+
+#endif
diff --git a/examples/PromiseDemo/BServer/BServant.tars b/examples/QuickStartDemo/ProxyServer/Server/Proxy.tars
similarity index 88%
rename from examples/PromiseDemo/BServer/BServant.tars
rename to examples/QuickStartDemo/ProxyServer/Server/Proxy.tars
index 4f498e6..156faeb 100644
--- a/examples/PromiseDemo/BServer/BServant.tars
+++ b/examples/QuickStartDemo/ProxyServer/Server/Proxy.tars
@@ -14,12 +14,13 @@
  * specific language governing permissions and limitations under the License.
  */
 
-module Test
+module TestApp
 {
 
-interface BServant
+interface Proxy
 {
-    int queryResult(string sIn, out string sOut);
+    int test();
+    int testProxy(string sReq, out string sRsp);
 };
 
 }; 
diff --git a/examples/QuickStartDemo/ProxyServer/Server/ProxyImp.cpp b/examples/QuickStartDemo/ProxyServer/Server/ProxyImp.cpp
new file mode 100644
index 0000000..5cc0fc4
--- /dev/null
+++ b/examples/QuickStartDemo/ProxyServer/Server/ProxyImp.cpp
@@ -0,0 +1,83 @@
+/**
+ * Tencent is pleased to support the open source community by making Tars available.
+ *
+ * Copyright (C) 2016THL A29 Limited, a Tencent company. All rights reserved.
+ *
+ * Licensed under the BSD 3-Clause License (the "License"); you may not use this file except 
+ * in compliance with the License. You may obtain a copy of the License at
+ *
+ * https://opensource.org/licenses/BSD-3-Clause
+ *
+ * Unless required by applicable law or agreed to in writing, software distributed 
+ * under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR 
+ * CONDITIONS OF ANY KIND, either express or implied. See the License for the 
+ * specific language governing permissions and limitations under the License.
+ */
+
+#include "ProxyImp.h"
+#include "ProxyServer.h"
+
+using namespace std;
+using namespace tars;
+
+class HelloCallback : public HelloPrxCallback
+{
+
+public:
+    HelloCallback(TarsCurrentPtr &current)
+    : _current(current)
+    {}
+
+    virtual void callback_testHello(tars::Int32 ret,  const std::string& sOut)
+    {
+        Proxy::async_response_testProxy(_current, ret, sOut);
+    }
+    virtual void callback_testHello_exception(tars::Int32 ret)
+    { 
+        TLOGERROR("HelloCallback callback_testHello_exception ret:" << ret << endl); 
+
+        Proxy::async_response_testProxy(_current, ret, "");
+    }
+
+    TarsCurrentPtr _current;
+};
+
+
+
+//////////////////////////////////////////////////////
+void ProxyImp::initialize()
+{
+    //initialize servant here:
+    //...
+
+    _prx = Application::getCommunicator()->stringToProxy<HelloPrx>("TestApp.HelloServer.HelloObj");
+}
+
+//////////////////////////////////////////////////////
+void ProxyImp::destroy()
+{
+}
+  
+//////////////////////////////////////////////////////
+tars::Int32 ProxyImp::test(tars::TarsCurrentPtr current) { return 0;}
+
+//////////////////////////////////////////////////////
+tars::Int32 ProxyImp::testProxy(const std::string& sIn, std::string &sOut, tars::TarsCurrentPtr current)
+{
+    try
+    {
+        current->setResponse(false);
+
+        TestApp::HelloPrxCallbackPtr cb = new HelloCallback(current);
+
+        _prx->tars_set_timeout(3000)->async_testHello(cb,sIn);
+    }
+    catch(std::exception &ex)
+    {
+        current->setResponse(true);
+
+        TLOGERROR("ProxyImp::testProxy ex:" << ex.what() << endl);
+    }
+
+    return 0;
+}
diff --git a/examples/PromiseDemo/BServer/BServantImp.h b/examples/QuickStartDemo/ProxyServer/Server/ProxyImp.h
similarity index 64%
rename from examples/PromiseDemo/BServer/BServantImp.h
rename to examples/QuickStartDemo/ProxyServer/Server/ProxyImp.h
index 1ca696d..9c924bd 100644
--- a/examples/PromiseDemo/BServer/BServantImp.h
+++ b/examples/QuickStartDemo/ProxyServer/Server/ProxyImp.h
@@ -14,26 +14,49 @@
  * specific language governing permissions and limitations under the License.
  */
 
-#ifndef _BServantImp_H_
-#define _BServantImp_H_
+#ifndef __PROXY_IMP_H_
+#define __PROXY_IMP_H_
 
 #include "servant/Application.h"
-#include "BServant.h"
-#include "promise/promise.h"
+#include "Hello.h"
+#include "Proxy.h"
 
-using namespace Test;
+using namespace TestApp;
 
-class BServantImp : public Test::BServant
+/**
+ *
+ *
+ */
+class ProxyImp : public TestApp::Proxy
 {
 public:
+    /**
+     *
+     */
+    virtual ~ProxyImp() {}
 
-    virtual ~BServantImp() {}
-
+    /**
+     *
+     */
     virtual void initialize();
 
+    /**
+     *
+     */
     virtual void destroy();
 
-    tars::Int32 queryResult(const std::string& sIn, std::string &sOut, tars::TarsCurrentPtr current);
+    /**
+     *
+     */
+    virtual tars::Int32 test(tars::TarsCurrentPtr current);
+
+    /**
+     *
+     */
+    virtual tars::Int32 testProxy(const std::string& sReq, std::string &sRsp, tars::TarsCurrentPtr current);
+
+private:
+    HelloPrx _prx;
 
 };
 /////////////////////////////////////////////////////
diff --git a/examples/PromiseDemo/BServer/BServer.cpp b/examples/QuickStartDemo/ProxyServer/Server/ProxyServer.cpp
similarity index 83%
rename from examples/PromiseDemo/BServer/BServer.cpp
rename to examples/QuickStartDemo/ProxyServer/Server/ProxyServer.cpp
index d203ec5..58def12 100644
--- a/examples/PromiseDemo/BServer/BServer.cpp
+++ b/examples/QuickStartDemo/ProxyServer/Server/ProxyServer.cpp
@@ -14,30 +14,30 @@
  * specific language governing permissions and limitations under the License.
  */
 
-#include "BServer.h"
-#include "BServantImp.h"
+#include "ProxyServer.h"
+#include "ProxyImp.h"
 
 using namespace std;
 
-BServer g_app;
+ProxyServer g_app;
 
 /////////////////////////////////////////////////////////////////
-void BServer::initialize()
+void ProxyServer::initialize()
 {
     //initialize application here:
-    //... 
+    addServant<ProxyImp>(ServerConfig::Application + "." + ServerConfig::ServerName + ".ProxyObj");
 
-    addServant<BServantImp>(ServerConfig::Application + "." + ServerConfig::ServerName + ".BServantObj");
 }
 /////////////////////////////////////////////////////////////////
-void BServer::destroyApp()
+void ProxyServer::destroyApp()
 {
     //destroy application here:
     //...
 }
 
 /////////////////////////////////////////////////////////////////
-int main(int argc, char* argv[])
+int
+main(int argc, char* argv[])
 {
     try
     {
diff --git a/examples/PromiseDemo/AServer/AServer.h b/examples/QuickStartDemo/ProxyServer/Server/ProxyServer.h
similarity index 83%
rename from examples/PromiseDemo/AServer/AServer.h
rename to examples/QuickStartDemo/ProxyServer/Server/ProxyServer.h
index 9e6238a..2e6d3a4 100644
--- a/examples/PromiseDemo/AServer/AServer.h
+++ b/examples/QuickStartDemo/ProxyServer/Server/ProxyServer.h
@@ -14,8 +14,8 @@
  * specific language governing permissions and limitations under the License.
  */
 
-#ifndef _BServer_H_
-#define _BServer_H_
+#ifndef __PROXY_SERVER_H_
+#define __PROXY_SERVER_H_
 
 #include <iostream>
 #include "servant/Application.h"
@@ -25,13 +25,13 @@ using namespace tars;
 /**
  *
  **/
-class AServer : public Application
+class ProxyServer : public Application
 {
 public:
     /**
      *
      **/
-    virtual ~AServer() {};
+    virtual ~ProxyServer() {};
 
     /**
      *
@@ -43,10 +43,10 @@ public:
      **/
     virtual void destroyApp();
 protected:
-    bool cmdprofile(const string& command, const string& params, string& result);
+
 };
 
-extern AServer g_app;
+extern ProxyServer g_app;
 
 ////////////////////////////////////////////
 #endif
diff --git a/examples/PromiseDemo/Client/makefile b/examples/QuickStartDemo/ProxyServer/Server/makefile
similarity index 66%
rename from examples/PromiseDemo/Client/makefile
rename to examples/QuickStartDemo/ProxyServer/Server/makefile
index 0381ec5..7138201 100644
--- a/examples/PromiseDemo/Client/makefile
+++ b/examples/QuickStartDemo/ProxyServer/Server/makefile
@@ -1,13 +1,17 @@
 
 #-----------------------------------------------------------------------
-APP       := Test
-TARGET    := myClientPromise
+
+APP       := TestApp
+TARGET    := ProxyServer
 CONFIG    := 
 STRIP_FLAG:= N
+TARS2CPP_FLAG:= 
 
-INCLUDE   +=
+INCLUDE   += 
+LIB       += 
 
 #-----------------------------------------------------------------------
-include /home/tarsproto/Test/AServer/AServer.mk
+include /home/tarsproto/TestApp/HelloServer/HelloServer.mk
 include /usr/local/tars/cpp/makefile/makefile.tars
+
 #-----------------------------------------------------------------------
diff --git a/examples/StressDemo/TarsStressServer/Stress.h b/examples/StressDemo/TarsStressServer/Stress.h
new file mode 100644
index 0000000..5dabc31
--- /dev/null
+++ b/examples/StressDemo/TarsStressServer/Stress.h
@@ -0,0 +1,471 @@
+// **********************************************************************
+// This file was generated by a TARS parser!
+// TARS version 1.4.0.
+// **********************************************************************
+
+#ifndef __STRESS_H_
+#define __STRESS_H_
+
+#include <map>
+#include <string>
+#include <vector>
+#include "tup/Tars.h"
+#include "tup/TarsJson.h"
+using namespace std;
+#include "servant/ServantProxy.h"
+#include "servant/Servant.h"
+
+
+namespace Test
+{
+
+    /* callback of async proxy for client */
+    class StressPrxCallback: public tars::ServantProxyCallback
+    {
+    public:
+        virtual ~StressPrxCallback(){}
+        virtual void callback_test(tars::Int32 ret)
+        { throw std::runtime_error("callback_test() override incorrect."); }
+        virtual void callback_test_exception(tars::Int32 ret)
+        { throw std::runtime_error("callback_test_exception() override incorrect."); }
+
+        virtual void callback_testStr(tars::Int32 ret,  const std::string& sOut)
+        { throw std::runtime_error("callback_testStr() override incorrect."); }
+        virtual void callback_testStr_exception(tars::Int32 ret)
+        { throw std::runtime_error("callback_testStr_exception() override incorrect."); }
+
+    public:
+        virtual const map<std::string, std::string> & getResponseContext() const
+        {
+            CallbackThreadData * pCbtd = CallbackThreadData::getData();
+            assert(pCbtd != NULL);
+
+            if(!pCbtd->getContextValid())
+            {
+                throw TC_Exception("cann't get response context");
+            }
+            return pCbtd->getResponseContext();
+        }
+
+    public:
+        virtual int onDispatch(tars::ReqMessagePtr msg)
+        {
+            static ::std::string __Stress_all[]=
+            {
+                "test",
+                "testStr"
+            };
+            pair<string*, string*> r = equal_range(__Stress_all, __Stress_all+2, string(msg->request.sFuncName));
+            if(r.first == r.second) return tars::TARSSERVERNOFUNCERR;
+            switch(r.first - __Stress_all)
+            {
+                case 0:
+                {
+                    if (msg->response->iRet != tars::TARSSERVERSUCCESS)
+                    {
+                        callback_test_exception(msg->response->iRet);
+
+                        return msg->response->iRet;
+                    }
+                    tars::TarsInputStream<tars::BufferReader> _is;
+
+                    _is.setBuffer(msg->response->sBuffer);
+                    tars::Int32 _ret;
+                    _is.read(_ret, 0, true);
+
+                    CallbackThreadData * pCbtd = CallbackThreadData::getData();
+                    assert(pCbtd != NULL);
+
+                    pCbtd->setResponseContext(msg->response->context);
+
+                    callback_test(_ret);
+
+                    pCbtd->delResponseContext();
+
+                    return tars::TARSSERVERSUCCESS;
+
+                }
+                case 1:
+                {
+                    if (msg->response->iRet != tars::TARSSERVERSUCCESS)
+                    {
+                        callback_testStr_exception(msg->response->iRet);
+
+                        return msg->response->iRet;
+                    }
+                    tars::TarsInputStream<tars::BufferReader> _is;
+
+                    _is.setBuffer(msg->response->sBuffer);
+                    tars::Int32 _ret;
+                    _is.read(_ret, 0, true);
+
+                    std::string sOut;
+                    _is.read(sOut, 2, true);
+                    CallbackThreadData * pCbtd = CallbackThreadData::getData();
+                    assert(pCbtd != NULL);
+
+                    pCbtd->setResponseContext(msg->response->context);
+
+                    callback_testStr(_ret, sOut);
+
+                    pCbtd->delResponseContext();
+
+                    return tars::TARSSERVERSUCCESS;
+
+                }
+            }
+            return tars::TARSSERVERNOFUNCERR;
+        }
+
+    };
+    typedef tars::TC_AutoPtr<StressPrxCallback> StressPrxCallbackPtr;
+
+    /* callback of coroutine async proxy for client */
+    class StressCoroPrxCallback: public StressPrxCallback
+    {
+    public:
+        virtual ~StressCoroPrxCallback(){}
+    public:
+        virtual const map<std::string, std::string> & getResponseContext() const { return _mRspContext; }
+
+        virtual void setResponseContext(const map<std::string, std::string> &mContext) { _mRspContext = mContext; }
+
+    public:
+        int onDispatch(tars::ReqMessagePtr msg)
+        {
+            static ::std::string __Stress_all[]=
+            {
+                "test",
+                "testStr"
+            };
+
+            pair<string*, string*> r = equal_range(__Stress_all, __Stress_all+2, string(msg->request.sFuncName));
+            if(r.first == r.second) return tars::TARSSERVERNOFUNCERR;
+            switch(r.first - __Stress_all)
+            {
+                case 0:
+                {
+                    if (msg->response->iRet != tars::TARSSERVERSUCCESS)
+                    {
+                        callback_test_exception(msg->response->iRet);
+
+                        return msg->response->iRet;
+                    }
+                    tars::TarsInputStream<tars::BufferReader> _is;
+
+                    _is.setBuffer(msg->response->sBuffer);
+                    try
+                    {
+                        tars::Int32 _ret;
+                        _is.read(_ret, 0, true);
+
+                        setResponseContext(msg->response->context);
+
+                        callback_test(_ret);
+
+                    }
+                    catch(std::exception &ex)
+                    {
+                        callback_test_exception(tars::TARSCLIENTDECODEERR);
+
+                        return tars::TARSCLIENTDECODEERR;
+                    }
+                    catch(...)
+                    {
+                        callback_test_exception(tars::TARSCLIENTDECODEERR);
+
+                        return tars::TARSCLIENTDECODEERR;
+                    }
+
+                    return tars::TARSSERVERSUCCESS;
+
+                }
+                case 1:
+                {
+                    if (msg->response->iRet != tars::TARSSERVERSUCCESS)
+                    {
+                        callback_testStr_exception(msg->response->iRet);
+
+                        return msg->response->iRet;
+                    }
+                    tars::TarsInputStream<tars::BufferReader> _is;
+
+                    _is.setBuffer(msg->response->sBuffer);
+                    try
+                    {
+                        tars::Int32 _ret;
+                        _is.read(_ret, 0, true);
+
+                        std::string sOut;
+                        _is.read(sOut, 2, true);
+                        setResponseContext(msg->response->context);
+
+                        callback_testStr(_ret, sOut);
+
+                    }
+                    catch(std::exception &ex)
+                    {
+                        callback_testStr_exception(tars::TARSCLIENTDECODEERR);
+
+                        return tars::TARSCLIENTDECODEERR;
+                    }
+                    catch(...)
+                    {
+                        callback_testStr_exception(tars::TARSCLIENTDECODEERR);
+
+                        return tars::TARSCLIENTDECODEERR;
+                    }
+
+                    return tars::TARSSERVERSUCCESS;
+
+                }
+            }
+            return tars::TARSSERVERNOFUNCERR;
+        }
+
+    protected:
+        map<std::string, std::string> _mRspContext;
+    };
+    typedef tars::TC_AutoPtr<StressCoroPrxCallback> StressCoroPrxCallbackPtr;
+
+    /* proxy for client */
+    class StressProxy : public tars::ServantProxy
+    {
+    public:
+        typedef map<string, string> TARS_CONTEXT;
+        tars::Int32 test(const map<string, string> &context = TARS_CONTEXT(),map<string, string> * pResponseContext = NULL)
+        {
+            tars::TarsOutputStream<tars::BufferWriterVector> _os;
+            std::map<string, string> _mStatus;
+            shared_ptr<tars::ResponsePacket> rep = tars_invoke(tars::TARSNORMAL,"test", _os, context, _mStatus);
+            if(pResponseContext)
+            {
+                pResponseContext->swap(rep->context);
+            }
+
+            tars::TarsInputStream<tars::BufferReader> _is;
+            _is.setBuffer(rep->sBuffer);
+            tars::Int32 _ret;
+            _is.read(_ret, 0, true);
+            return _ret;
+        }
+
+        void async_test(StressPrxCallbackPtr callback,const map<string, string>& context = TARS_CONTEXT())
+        {
+            tars::TarsOutputStream<tars::BufferWriterVector> _os;
+            std::map<string, string> _mStatus;
+            tars_invoke_async(tars::TARSNORMAL,"test", _os, context, _mStatus, callback);
+        }
+        
+        void coro_test(StressCoroPrxCallbackPtr callback,const map<string, string>& context = TARS_CONTEXT())
+        {
+            tars::TarsOutputStream<tars::BufferWriterVector> _os;
+            std::map<string, string> _mStatus;
+            tars_invoke_async(tars::TARSNORMAL,"test", _os, context, _mStatus, callback);
+        }
+
+        tars::Int32 testStr(const std::string & sIn,std::string &sOut,const map<string, string> &context = TARS_CONTEXT(),map<string, string> * pResponseContext = NULL)
+        {
+            tars::TarsOutputStream<tars::BufferWriterVector> _os;
+            _os.write(sIn, 1);
+            _os.write(sOut, 2);
+            std::map<string, string> _mStatus;
+            shared_ptr<tars::ResponsePacket> rep = tars_invoke(tars::TARSNORMAL,"testStr", _os, context, _mStatus);
+            if(pResponseContext)
+            {
+                pResponseContext->swap(rep->context);
+            }
+
+            tars::TarsInputStream<tars::BufferReader> _is;
+            _is.setBuffer(rep->sBuffer);
+            tars::Int32 _ret;
+            _is.read(_ret, 0, true);
+            _is.read(sOut, 2, true);
+            return _ret;
+        }
+
+        void async_testStr(StressPrxCallbackPtr callback,const std::string &sIn,const map<string, string>& context = TARS_CONTEXT())
+        {
+            tars::TarsOutputStream<tars::BufferWriterVector> _os;
+            _os.write(sIn, 1);
+            std::map<string, string> _mStatus;
+            tars_invoke_async(tars::TARSNORMAL,"testStr", _os, context, _mStatus, callback);
+        }
+        
+        void coro_testStr(StressCoroPrxCallbackPtr callback,const std::string &sIn,const map<string, string>& context = TARS_CONTEXT())
+        {
+            tars::TarsOutputStream<tars::BufferWriterVector> _os;
+            _os.write(sIn, 1);
+            std::map<string, string> _mStatus;
+            tars_invoke_async(tars::TARSNORMAL,"testStr", _os, context, _mStatus, callback);
+        }
+
+        StressProxy* tars_hash(int64_t key)
+        {
+            return (StressProxy*)ServantProxy::tars_hash(key);
+        }
+
+        StressProxy* tars_consistent_hash(int64_t key)
+        {
+            return (StressProxy*)ServantProxy::tars_consistent_hash(key);
+        }
+
+        StressProxy* tars_set_timeout(int msecond)
+        {
+            return (StressProxy*)ServantProxy::tars_set_timeout(msecond);
+        }
+
+        static const char* tars_prxname() { return "StressProxy"; }
+    };
+    typedef tars::TC_AutoPtr<StressProxy> StressPrx;
+
+    /* servant for server */
+    class Stress : public tars::Servant
+    {
+    public:
+        virtual ~Stress(){}
+        virtual tars::Int32 test(tars::TarsCurrentPtr current) = 0;
+        static void async_response_test(tars::TarsCurrentPtr current, tars::Int32 _ret)
+        {
+            if (current->getRequestVersion() == TUPVERSION )
+            {
+                UniAttribute<tars::BufferWriterVector, tars::BufferReader>  tarsAttr;
+                tarsAttr.setVersion(current->getRequestVersion());
+                tarsAttr.put("", _ret);
+
+                vector<char> sTupResponseBuffer;
+                tarsAttr.encode(sTupResponseBuffer);
+                current->sendResponse(tars::TARSSERVERSUCCESS, sTupResponseBuffer);
+            }
+            else
+            {
+                tars::TarsOutputStream<tars::BufferWriterVector> _os;
+                _os.write(_ret, 0);
+
+                current->sendResponse(tars::TARSSERVERSUCCESS, _os.getByteBuffer());
+            }
+        }
+
+        virtual tars::Int32 testStr(const std::string & sIn,std::string &sOut,tars::TarsCurrentPtr current) = 0;
+        static void async_response_testStr(tars::TarsCurrentPtr current, tars::Int32 _ret, const std::string &sOut)
+        {
+            if (current->getRequestVersion() == TUPVERSION )
+            {
+                UniAttribute<tars::BufferWriterVector, tars::BufferReader>  tarsAttr;
+                tarsAttr.setVersion(current->getRequestVersion());
+                tarsAttr.put("", _ret);
+                tarsAttr.put("sOut", sOut);
+
+                vector<char> sTupResponseBuffer;
+                tarsAttr.encode(sTupResponseBuffer);
+                current->sendResponse(tars::TARSSERVERSUCCESS, sTupResponseBuffer);
+            }
+            else
+            {
+                tars::TarsOutputStream<tars::BufferWriterVector> _os;
+                _os.write(_ret, 0);
+
+                _os.write(sOut, 2);
+
+                current->sendResponse(tars::TARSSERVERSUCCESS, _os.getByteBuffer());
+            }
+        }
+
+    public:
+        int onDispatch(tars::TarsCurrentPtr _current, vector<char> &_sResponseBuffer)
+        {
+            static ::std::string __Test__Stress_all[]=
+            {
+                "test",
+                "testStr"
+            };
+
+            pair<string*, string*> r = equal_range(__Test__Stress_all, __Test__Stress_all+2, _current->getFuncName());
+            if(r.first == r.second) return tars::TARSSERVERNOFUNCERR;
+            switch(r.first - __Test__Stress_all)
+            {
+                case 0:
+                {
+                    tars::TarsInputStream<tars::BufferReader> _is;
+                    _is.setBuffer(_current->getRequestBuffer());
+                    if (_current->getRequestVersion() == TUPVERSION)
+                    {
+                        UniAttribute<tars::BufferWriterVector, tars::BufferReader>  tarsAttr;
+                        tarsAttr.setVersion(_current->getRequestVersion());
+                        tarsAttr.decode(_current->getRequestBuffer());
+                    }
+                    else
+                    {
+                    }
+                    tars::Int32 _ret = test(_current);
+                    if(_current->isResponse())
+                    {
+                        if (_current->getRequestVersion() == TUPVERSION )
+                        {
+                            UniAttribute<tars::BufferWriterVector, tars::BufferReader>  tarsAttr;
+                            tarsAttr.setVersion(_current->getRequestVersion());
+                            tarsAttr.put("", _ret);
+                            tarsAttr.encode(_sResponseBuffer);
+                        }
+                        else
+                        {
+                            tars::TarsOutputStream<tars::BufferWriterVector> _os;
+                            _os.write(_ret, 0);
+                            _os.swap(_sResponseBuffer);
+                        }
+                    }
+                    return tars::TARSSERVERSUCCESS;
+
+                }
+                case 1:
+                {
+                    tars::TarsInputStream<tars::BufferReader> _is;
+                    _is.setBuffer(_current->getRequestBuffer());
+                    std::string sIn;
+                    std::string sOut;
+                    if (_current->getRequestVersion() == TUPVERSION)
+                    {
+                        UniAttribute<tars::BufferWriterVector, tars::BufferReader>  tarsAttr;
+                        tarsAttr.setVersion(_current->getRequestVersion());
+                        tarsAttr.decode(_current->getRequestBuffer());
+                        tarsAttr.get("sIn", sIn);
+                        tarsAttr.getByDefault("sOut", sOut, sOut);
+                    }
+                    else
+                    {
+                        _is.read(sIn, 1, true);
+                        _is.read(sOut, 2, false);
+                    }
+                    tars::Int32 _ret = testStr(sIn,sOut, _current);
+                    if(_current->isResponse())
+                    {
+                        if (_current->getRequestVersion() == TUPVERSION )
+                        {
+                            UniAttribute<tars::BufferWriterVector, tars::BufferReader>  tarsAttr;
+                            tarsAttr.setVersion(_current->getRequestVersion());
+                            tarsAttr.put("", _ret);
+                            tarsAttr.put("sOut", sOut);
+                            tarsAttr.encode(_sResponseBuffer);
+                        }
+                        else
+                        {
+                            tars::TarsOutputStream<tars::BufferWriterVector> _os;
+                            _os.write(_ret, 0);
+                            _os.write(sOut, 2);
+                            _os.swap(_sResponseBuffer);
+                        }
+                    }
+                    return tars::TARSSERVERSUCCESS;
+
+                }
+            }
+            return tars::TARSSERVERNOFUNCERR;
+        }
+    };
+
+
+}
+
+
+
+#endif
diff --git a/examples/scripts/run-quick-start.sh b/examples/scripts/run-quick-start.sh
new file mode 100644
index 0000000..89e30d0
--- /dev/null
+++ b/examples/scripts/run-quick-start.sh
@@ -0,0 +1,17 @@
+#!/bin/bash
+
+echo "run-quick-start.sh"
+
+WORKDIR=$(pwd)
+
+echo ${WORKDIR}
+
+killall -9 QuickStartDemo
+
+${WORKDIR}/../bin/QuickStartDemo --config=${WORKDIR}/../../examples/QuickStartDemo/HelloServer/Server/config.conf &
+
+sleep 3
+
+${WORKDIR}/../bin/QuickStartDemoClient
+
+
diff --git a/servant/promise/exception_ptr.h b/servant/promise/exception_ptr.h
deleted file mode 100644
index e4edff4..0000000
--- a/servant/promise/exception_ptr.h
+++ /dev/null
@@ -1,235 +0,0 @@
-/**
- * Tencent is pleased to support the open source community by making Tars available.
- *
- * Copyright (C) 2016THL A29 Limited, a Tencent company. All rights reserved.
- *
- * Licensed under the BSD 3-Clause License (the "License"); you may not use this file except 
- * in compliance with the License. You may obtain a copy of the License at
- *
- * https://opensource.org/licenses/BSD-3-Clause
- *
- * Unless required by applicable law or agreed to in writing, software distributed 
- * under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR 
- * CONDITIONS OF ANY KIND, either express or implied. See the License for the 
- * specific language governing permissions and limitations under the License.
- */
-
-#ifndef __TARS_PROMISE_EXCEPTION_PTR_H_
-#define __TARS_PROMISE_EXCEPTION_PTR_H_
-
-// #include "util/tc_shared_ptr.h"
-#include "promise_exception.h"
-#include <stdexcept>
-#include <new>
-#include <typeinfo>
-#include <string>
-
-using namespace std;
-
-namespace tars 
-{
-namespace detail 
-{
-    class ExceptionBase : public std::exception
-    {
-    public:
-        ExceptionBase() {}
-
-        virtual ~ExceptionBase() throw() {}
-
-        virtual ExceptionBase* clone() const { return new ExceptionBase(*this); }
-
-        virtual void rethrow() const { throw *this; }
-
-        virtual const char* what() const throw() { return "ExceptionBase"; }
-        
-        virtual int getErrCode() const { return -1; }
-    };
-
-    class ExceptionBaseImpl : public ExceptionBase
-    {
-    public:
-        ExceptionBaseImpl() {}
-        
-        ExceptionBaseImpl(const std::string& s)
-        : _sInfo(s)
-        , _error(-1)
-        {}
-        
-        ExceptionBaseImpl(const std::string& s, int err)
-        : _sInfo(s)
-        , _error(err)
-        {}
-
-        virtual ~ExceptionBaseImpl() throw() {}
-
-        virtual ExceptionBase* clone() const
-        {
-            return new ExceptionBaseImpl(*this);
-        }
-
-        virtual void rethrow() const
-        {
-            throw *this;
-        }
-
-        virtual const char* what() const throw()
-        {
-            return _sInfo.c_str();
-        }
-        
-        virtual int getErrCode() const
-        { 
-            return _error; 
-        }
-    private:
-        std::string _sInfo;
-        int            _error;
-    };
-
-}  // namespace detail
-
-typedef shared_ptr<detail::ExceptionBase> ExceptionPtr;
-
-class CurrentExceptionUnknownException : PromiseException 
-{
-private:
-
-    const char *name() const
-    { 
-        return "CurrentExceptionUnknownException"; 
-    }
-};
-
-/**
- *
- */
-inline ExceptionPtr currentException()
-{
-    try 
-    {
-        try 
-        {
-            throw;
-        } 
-        catch (detail::ExceptionBaseImpl& e) 
-        {
-            return ExceptionPtr(e.clone());
-        } 
-        catch (detail::ExceptionBase& e) 
-        {
-            return ExceptionPtr(e.clone());
-        } 
-        catch (std::domain_error& e) 
-        {
-            return ExceptionPtr(new detail::ExceptionBaseImpl(string(e.what(), strlen(e.what())) ));
-        } 
-        catch (std::invalid_argument& e) 
-        {
-            return ExceptionPtr(new detail::ExceptionBaseImpl(string(e.what(), strlen(e.what())) ));
-        } 
-        catch (std::length_error& e) 
-        {
-            return ExceptionPtr(new detail::ExceptionBaseImpl(string(e.what(), strlen(e.what())) ));
-        } 
-        catch (std::out_of_range& e) 
-        {
-            return ExceptionPtr(new detail::ExceptionBaseImpl(string(e.what(), strlen(e.what())) ));
-        } 
-        catch (std::range_error& e) 
-        {
-            return ExceptionPtr(new detail::ExceptionBaseImpl(string(e.what(), strlen(e.what())) ));                
-        } 
-        catch (std::overflow_error& e) 
-        {
-            return ExceptionPtr(new detail::ExceptionBaseImpl(string(e.what(), strlen(e.what())) ));
-        } 
-        catch (std::underflow_error& e) 
-        {
-            return ExceptionPtr(new detail::ExceptionBaseImpl(string(e.what(), strlen(e.what())) ));
-        } 
-        catch (std::logic_error& e) 
-        {
-            return ExceptionPtr(new detail::ExceptionBaseImpl(string(e.what(), strlen(e.what())) ));
-        } 
-        catch (std::bad_alloc& e) 
-        {
-            return ExceptionPtr(new detail::ExceptionBaseImpl(string(e.what(), strlen(e.what())) ));
-        } 
-        catch (std::bad_cast& e) 
-        {
-            return ExceptionPtr(new detail::ExceptionBaseImpl(string(e.what(), strlen(e.what())) ));
-        } 
-        catch (std::bad_typeid& e) 
-        {
-            return ExceptionPtr(new detail::ExceptionBaseImpl(string(e.what(), strlen(e.what())) ));
-        } 
-        catch (std::bad_exception& e) 
-        {
-            return ExceptionPtr(new detail::ExceptionBaseImpl(string(e.what(), strlen(e.what())) ));
-        } 
-        catch (PromiseException& e) 
-        {
-            return ExceptionPtr(new detail::ExceptionBaseImpl(string(e.what(), strlen(e.what())) ));
-        } 
-        catch (std::exception& e) 
-        {
-            return ExceptionPtr(new detail::ExceptionBaseImpl(string(e.what(), strlen(e.what())) ));
-        }
-    } 
-    catch (std::bad_alloc& e) 
-    {
-        //return detail::ExceptionPtrStaticExceptionObject<std::bad_alloc>::e;
-        return ExceptionPtr(new detail::ExceptionBaseImpl(string(e.what(), strlen(e.what())) ));
-    } 
-    catch (...) 
-    {
-        //return detail::ExceptionPtrStaticExceptionObject<CurrentExceptionUnknownException>::e;
-        return ExceptionPtr(new detail::ExceptionBaseImpl(string("PromiseUnknownException") ));
-    }
-}
-
-
-inline detail::ExceptionBaseImpl enableCurrentException(const string& t)
-{
-    return detail::ExceptionBaseImpl(t);
-}
-
-inline detail::ExceptionBaseImpl enableCurrentException(const string& t, int err)
-{
-    return detail::ExceptionBaseImpl(t, err);
-}
-
-template <typename E>
-inline void throwException(const E& e)
-{
-    throw enableCurrentException(string(e.what(), strlen(e.what())));
-}
-
-inline ExceptionPtr copyException(const string& e)
-{
-    try 
-    {
-        throw enableCurrentException(e);
-    } 
-    catch (...) 
-    {
-        return currentException();
-    }
-}
-
-inline ExceptionPtr copyException(const string& e, int err)
-{
-    try 
-    {
-        throw enableCurrentException(e, err);
-    } 
-    catch (...) 
-    {
-        return currentException();
-    }
-}
-    
-}  // namespace promise
-
-#endif  // __EXCEPTION_PTR_H__
diff --git a/servant/promise/promise.h b/servant/promise/promise.h
deleted file mode 100644
index a37daeb..0000000
--- a/servant/promise/promise.h
+++ /dev/null
@@ -1,904 +0,0 @@
-/**
- * Tencent is pleased to support the open source community by making Tars available.
- *
- * Copyright (C) 2016THL A29 Limited, a Tencent company. All rights reserved.
- *
- * Licensed under the BSD 3-Clause License (the "License"); you may not use this file except 
- * in compliance with the License. You may obtain a copy of the License at
- *
- * https://opensource.org/licenses/BSD-3-Clause
- *
- * Unless required by applicable law or agreed to in writing, software distributed 
- * under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR 
- * CONDITIONS OF ANY KIND, either express or implied. See the License for the 
- * specific language governing permissions and limitations under the License.
- */
-
-#ifndef __TARS_PROMISE_H_
-#define __TARS_PROMISE_H_
-
-// #include "util/tc_callback.h"
-#include "exception_ptr.h"
-#include <pthread.h>
-#include <list>
-#include "promise_exception.h"
-// #include "util/tc_bind.h"
-// #include "util/tc_enable_shared_from_this.h"
-// #include "util/detail/assert.h"
-// #include "util/detail/tc_template_util.h"
-#include "util/tc_monitor.h"
-
-// using namespace tars;
-
-namespace tars 
-{
-
-class PromiseAlreadySatisfiedException : public PromiseException 
-{
-public:
-
-    PromiseAlreadySatisfiedException(const char *filename, int line)
-    : PromiseException(filename, line)
-    {}
-    
-protected:
-
-    virtual const char *name() const
-    {
-        return "PromiseAlreadySatisfiedException";
-    }
-};
-
-class FutureUninitializedException : public PromiseException 
-{
-public:
-    FutureUninitializedException(const char *filename, int line)
-    : PromiseException(filename, line)
-    {}
-
-protected:
-    virtual const char *name() const
-    {
-        return "FutureUninitializedException";
-    }
-};
-    
-template <typename T> class Future;
-
-template <typename T> struct is_future_type : std::false_type {};
-template <typename T> struct is_future_type<Future<T> > : std::true_type {};
-
-template <typename T> class Promise;
-    
-namespace detail
-{
-    template <typename T>
-    struct resolved_type 
-    {
-        typedef T type;
-    };
-
-    template <typename T>
-    struct resolved_type<Future<T> > 
-    {
-        typedef T type;
-    };
-
-    template <typename T>
-    struct FutureTraits 
-    {
-        // typedef TC_ScopedPtr<T> storage_type;
-        typedef std::unique_ptr<T> storage_type;
-        typedef const T& rvalue_source_type;
-        typedef const T& move_dest_type;
-        typedef T& dest_reference_type;
-
-        static void init(storage_type& storage, rvalue_source_type t)
-        {
-            storage.reset(new T(t));
-        }
-
-        static void assign(dest_reference_type dest, const storage_type& storage)
-        {
-            dest = *storage;
-        }
-    };
-
-    template <typename T>
-    struct FutureTraits<T&> 
-    {
-        typedef T* storage_type;
-        typedef T& rvalue_source_type;
-        typedef T& move_dest_type;
-        typedef T*& dest_reference_type;
-
-        static void init(storage_type& storage, T& t)
-        {
-            storage = &t;
-        }
-
-        static void assign(dest_reference_type dest, const storage_type& storage)
-        {
-            dest = storage;
-        }
-    };
-        
-    template <>
-    struct FutureTraits<void> 
-    {
-        typedef void rvalue_source_type;
-        typedef void move_dest_type;
-    };
-    
-    template <typename T>
-    class FutureObjectInterface 
-    {
-    public:
-        typedef typename FutureTraits<T>::rvalue_source_type rvalue_source_type;
-        typedef typename FutureTraits<T>::move_dest_type move_dest_type;
-        typedef typename FutureTraits<T>::dest_reference_type dest_reference_type;
-        typedef std::function<void(const std::shared_ptr<FutureObjectInterface>&)> CallbackType;
-        
-        virtual ~FutureObjectInterface() {}
-
-        virtual bool isDone() const = 0;
-        virtual bool hasValue() const = 0;
-        virtual bool hasException() const = 0;
-        virtual void setValue(rvalue_source_type v) = 0;
-        virtual void setException(const ExceptionPtr& e) = 0;
-        virtual move_dest_type get() const = 0;
-        virtual bool tryGet(dest_reference_type v) const = 0;
-        virtual void registerCallback(const CallbackType& callback) = 0;
-    };
-        
-    template <>
-    class FutureObjectInterface<void> 
-    {
-    public:
-        typedef FutureTraits<void>::move_dest_type move_dest_type;
-        typedef std::function<void(const std::shared_ptr<FutureObjectInterface>&)> CallbackType;
-        
-        virtual ~FutureObjectInterface() {}
-
-        virtual bool isDone() const = 0;
-        virtual bool hasValue() const = 0;
-        virtual bool hasException() const = 0;
-        virtual void set() = 0;
-        virtual void setException(const ExceptionPtr& e) = 0;
-        virtual move_dest_type get() const = 0;
-        virtual void registerCallback(const CallbackType& callback) = 0;
-    };
-    
-    template <typename T>
-    class PromptFutureObject : public FutureObjectInterface<T>,
-                               public std::enable_shared_from_this<PromptFutureObject<T> > 
-    {
-    public:
-        typedef typename FutureObjectInterface<T>::move_dest_type move_dest_type;
-        typedef typename FutureObjectInterface<T>::rvalue_source_type rvalue_source_type;
-        typedef typename FutureObjectInterface<T>::dest_reference_type dest_reference_type;
-        typedef typename FutureObjectInterface<T>::CallbackType CallbackType;
-        
-        PromptFutureObject(rvalue_source_type v)
-        {
-            FutureTraits<T>::init(m_value, v);
-        }
-
-        PromptFutureObject(const ExceptionPtr& e)
-            : m_exception_ptr(e)
-        {}
-        
-        virtual ~PromptFutureObject() {}
-
-        virtual bool isDone() const { return true; }
-
-        virtual bool hasValue() const
-        {
-            if (m_exception_ptr)
-                return false;
-            return true;
-        }
-        
-        virtual bool hasException() const { return !!m_exception_ptr; }
-
-        virtual void setValue(rvalue_source_type /*v*/) {}
-        virtual void setException(const ExceptionPtr& /*e*/) {}
-        
-        virtual move_dest_type get() const
-        {
-            assert(m_exception_ptr || m_value);
-            if (m_exception_ptr)
-                m_exception_ptr->rethrow();
-            return *m_value;
-        }
-        
-        virtual bool tryGet(dest_reference_type v) const { FutureTraits<T>::assign(v, m_value); return true; }
-        
-        virtual void registerCallback(const CallbackType& callback)
-        {
-            assert(callback);
-            try 
-            {
-                callback(this->shared_from_this());
-            } 
-            catch (...) 
-            {
-            }
-        }
-        
-    private:
-        typename FutureTraits<T>::storage_type m_value;
-        ExceptionPtr m_exception_ptr;
-    };
-    
-    template <>
-    class PromptFutureObject<void> : public FutureObjectInterface<void>,
-                                     public std::enable_shared_from_this<PromptFutureObject<void> >
-    {
-    public:
-        typedef FutureObjectInterface<void>::move_dest_type move_dest_type;
-        typedef FutureObjectInterface<void>::CallbackType CallbackType;
-        
-        PromptFutureObject() {}
-
-        PromptFutureObject(const ExceptionPtr& e)
-            : m_exception_ptr(e)
-        {}
-        
-        virtual ~PromptFutureObject() {}
-
-        virtual bool isDone() const { return true; }
-
-        virtual bool hasValue() const
-        {
-            if (m_exception_ptr)
-                return false;
-            return true;
-        }
-        
-        virtual bool hasException() const { return (m_exception_ptr != NULL); }
-
-        virtual void set() {}
-        virtual void setException(const ExceptionPtr& /*e*/) {}
-        
-        virtual move_dest_type get() const
-        {
-            if (m_exception_ptr)
-                m_exception_ptr->rethrow();
-        }
-        
-        virtual void registerCallback(const CallbackType& callback)
-        {
-            assert(callback);
-            try 
-            {
-                callback(this->shared_from_this());
-            } 
-            catch (...) 
-            {
-            }
-        }
-        
-    private:
-        ExceptionPtr m_exception_ptr;
-    };
-
-    struct FutureObjectBase 
-    {
-        FutureObjectBase()
-        : m_is_done(false)
-        {}
-
-        virtual ~FutureObjectBase() {}
-        
-        bool isDone() const
-        {
-            TC_ThreadLock::Lock lock(m_monitor);
-            return m_is_done;
-        }
-        
-        bool hasValue() const
-        {
-            TC_ThreadLock::Lock lock(m_monitor);
-            return m_is_done && !m_exception_ptr;
-        }
-
-        bool hasException() const
-        {
-            TC_ThreadLock::Lock lock(m_monitor);
-            return m_is_done && m_exception_ptr;
-        }
-        
-        void markFinishedWithException(const ExceptionPtr& e)
-        {
-            assert(e);
-
-            TC_ThreadLock::Lock lock(m_monitor);
-            if (m_is_done) 
-            {
-                throw PromiseAlreadySatisfiedException(__FILE__, __LINE__);
-            }
-            m_exception_ptr = e;
-            markFinishedInternal();
-        }
-
-        void markFinishedInternal()
-        {
-            m_is_done = true;
-
-            m_monitor.notifyAll();
-        }
-
-        void wait() const
-        {
-            {
-                TC_ThreadLock::Lock lock(m_monitor);
-                while(!m_is_done)
-                {
-                    m_monitor.wait();
-                }
-            }
-
-            if (m_exception_ptr)
-                m_exception_ptr->rethrow();
-        }
-
-        TC_ThreadLock  m_monitor;
-        bool m_is_done;
-        ExceptionPtr m_exception_ptr;
-    };
-    
-    template <typename T>
-    class FutureObject : public FutureObjectInterface<T>,
-                         public std::enable_shared_from_this<FutureObject<T> >,
-                         private FutureObjectBase 
-    {
-    public:
-
-        typedef typename FutureObjectInterface<T>::move_dest_type move_dest_type;
-        typedef typename FutureObjectInterface<T>::rvalue_source_type rvalue_source_type;
-        typedef typename FutureObjectInterface<T>::CallbackType CallbackType;
-        typedef typename FutureObjectInterface<T>::dest_reference_type dest_reference_type;
-        
-        FutureObject() {}
-
-        virtual ~FutureObject() {}
-        
-        virtual bool isDone() const
-        {
-            return FutureObjectBase::isDone();
-        }
-        
-        virtual bool hasValue() const
-        {
-            return FutureObjectBase::hasValue();
-        }
-
-        virtual bool hasException() const
-        {
-            return FutureObjectBase::hasException();
-        }
-        
-        virtual move_dest_type get() const
-        {
-            wait();
-
-            assert(m_value);
-            return *m_value;
-        }
-
-        virtual bool tryGet(dest_reference_type v) const
-        {
-            if (!isDone())
-                return false;
-            if (m_exception_ptr)
-                m_exception_ptr->rethrow();
-            FutureTraits<T>::assign(v, m_value);
-            return true;
-        }
-        
-        virtual void setException(const ExceptionPtr& e)
-        {
-            markFinishedWithException(e);
-            doPendingCallbacks();
-        }
-        
-        virtual void setValue(rvalue_source_type t)
-        {
-            {
-                TC_ThreadLock::Lock lock(m_monitor);
-                if (m_is_done) 
-                {
-                    throwException(PromiseAlreadySatisfiedException(__FILE__, __LINE__));
-                }
-                m_value.reset(new T(t));
-                markFinishedInternal();
-            }
-            doPendingCallbacks();
-        }
-        
-        virtual void registerCallback(const CallbackType& callback)
-        {
-            assert(callback);
-
-            TC_ThreadLock::Lock lock(m_monitor);
-            if (m_is_done) 
-            {
-                lock.release();
-                try 
-                {
-                    callback(this->shared_from_this());
-                } 
-                catch (...) 
-                {
-                }
-            } 
-            else 
-            {
-                m_pending_callbacks.push_back(callback);
-            }
-        }
-
-    private:
-
-        void doPendingCallbacks()
-        {
-            std::list<CallbackType> callbacks;
-            {
-                TC_ThreadLock::Lock lock(m_monitor);
-                callbacks.swap(m_pending_callbacks);
-            }
-
-            for (typename std::list<CallbackType>::const_iterator it = callbacks.begin(),
-                                                                 end = callbacks.end();
-                    it != end; ++it) 
-            {
-                try 
-                {
-                    (*it)(this->shared_from_this());
-                } 
-                catch (...) 
-                {
-                
-                }
-            }
-        }
-
-        typename FutureTraits<T>::storage_type m_value;
-        std::list<CallbackType> m_pending_callbacks;
-    };
-
-    template <>
-    class FutureObject<void> : public FutureObjectInterface<void>,
-                               public std::enable_shared_from_this<FutureObject<void> >,
-                               private FutureObjectBase 
-    {
-    public:
-        
-        using typename FutureObjectInterface<void>::CallbackType;
-        
-        FutureObject() {}
-
-        virtual ~FutureObject() {}
-        
-        virtual bool isDone() const
-        {
-            return FutureObjectBase::isDone();
-        }
-        
-        virtual bool hasValue() const
-        {
-            return FutureObjectBase::hasValue();
-        }
-
-        virtual bool hasException() const
-        {
-            return FutureObjectBase::hasException();
-        }
-        
-        virtual void get() const
-        {
-            wait();
-        }
-
-        virtual void set()
-        {
-            {
-                TC_ThreadLock::Lock lock(m_monitor);
-                if (m_is_done) 
-                {
-                    throwException(PromiseAlreadySatisfiedException(__FILE__, __LINE__));
-                }
-                markFinishedInternal();
-            }
-
-            doPendingCallbacks();
-        }
-
-        virtual void setException(const ExceptionPtr& e)
-        {
-            markFinishedWithException(e);
-            doPendingCallbacks();
-        }
-
-        void registerCallback(const CallbackType& callback)
-        {
-            assert(callback);
-
-            TC_ThreadLock::Lock lock(m_monitor);
-            if (m_is_done) 
-            {
-                lock.release();
-                try 
-                {
-                    callback(this->shared_from_this());
-                } 
-                catch (...) 
-                {
-                    
-                }
-                return;
-            }
-            m_pending_callbacks.push_back(callback);
-        }
-
-    private:
-        void doPendingCallbacks()
-        {
-            std::list<CallbackType> callbacks;
-            {
-                TC_ThreadLock::Lock lock(m_monitor);
-                callbacks.swap(m_pending_callbacks);
-            }
-
-            for (std::list<CallbackType>::const_iterator it = callbacks.begin(),
-                                                        end = callbacks.end();
-                    it != end; ++it) 
-            {
-                (*it)(this->shared_from_this());
-            }
-        }
-
-        std::list<CallbackType> m_pending_callbacks;
-    };
-
-    template <typename R> class ForwardValue;
-
-    template <typename R, typename T>
-    class SequentialCallback 
-    {
-    private:
-        typedef typename detail::resolved_type<R>::type value_type;
-        typedef std::shared_ptr<detail::FutureObjectInterface<T> > FuturePtr;
-    public:
-        SequentialCallback(const std::function<R(const Future<T>&)>& callback,
-                           const Promise<value_type>& promise)
-        : m_callback(callback)
-        , m_promise(promise)
-        {}
-        
-        template <typename U>
-        typename std::enable_if<std::is_void<U>::value >::type run(const FuturePtr& future)
-        {
-            try 
-            {
-                m_callback(future);
-                m_promise.set();
-            } 
-            catch (...) 
-            {
-                m_promise.setException(currentException());
-            }
-        }
-
-        template <typename U>
-        typename std::enable_if<!std::is_void<U>::value && !is_future_type<U>::value>::type
-        run(const FuturePtr& future)
-        {
-            try 
-            {
-                m_promise.setValue(m_callback(future));
-            } 
-            catch (...) 
-            {
-                m_promise.setException(currentException());
-            }
-        }
-
-        template <typename U>
-        typename std::enable_if<is_future_type<U>::value >::type run(const FuturePtr& future)
-        {
-            try 
-            {
-                m_callback(future).then(TC_Bind(&ForwardValue<value_type>::template run<value_type>,
-                                             tc_owned(new ForwardValue<value_type>(m_promise))));
-            } 
-            catch (...) 
-            {
-                m_promise.setException(currentException());
-            }
-        }
-        
-    private:
-
-        std::function<R(const Future<T>&)> m_callback;
-        Promise<value_type> m_promise;
-    };
-
-    template <typename R>
-    class ForwardValue 
-    {
-    public:
-        ForwardValue(const Promise<R>& promise)
-            : m_promise(promise)
-        {}
-
-        template <typename V>
-        typename std::enable_if<std::is_void<V>::value >::type run(const Future<V>& future)
-        {
-            try 
-            {
-                future.get();
-                m_promise.set();
-            } 
-            catch (...) 
-            {
-                m_promise.setException(currentException());
-            }
-        }
-
-        template <typename V>
-        typename std::enable_if<!std::is_void<V>::value >::type run(const Future<V>& future)
-        {
-            try 
-            {
-                m_promise.setValue(future.get());
-            } 
-            catch (...) 
-            {
-                m_promise.setException(currentException());
-            }
-        }
-
-    private:
-        Promise<R> m_promise;
-    };
-    
-    template <typename T>
-    class FutureBase 
-    {
-    private:
-        typedef typename detail::FutureTraits<T>::move_dest_type move_dest_type;
-        typedef typename detail::FutureTraits<T>::rvalue_source_type rvalue_source_type;
-    public:
-        typedef bool (FutureBase::*unspecified_bool_type)() const;
-        
-        FutureBase() {}
-
-        FutureBase(const ExceptionPtr& e)
-        : m_future(std::shared_ptr<detail::PromptFutureObject<T> >(new detail::PromptFutureObject<T>(e)))
-        {}
-    
-        virtual ~FutureBase() {}
-
-        move_dest_type get() const
-        {
-            if (!m_future)
-            {
-                throwException(FutureUninitializedException(__FILE__, __LINE__));
-            }
-            return m_future->get();
-        }
-
-        bool isDone() const
-        {
-            if (!m_future)
-                return false;
-            return m_future && m_future->isDone();
-        }
-
-        bool hasValue() const
-        {
-            if (!m_future)
-                return false;
-            return m_future && m_future->hasValue();
-        }
-    
-        bool hasException() const
-        {
-            if (!m_future)
-                return false;
-            return m_future && m_future->hasException();
-        }
-
-        operator unspecified_bool_type() const
-        {
-            return m_future ? &FutureBase::isDone : NULL;
-        }
-        
-    protected:
-
-        typedef std::shared_ptr<detail::FutureObjectInterface<T> > FuturePtr;
-    
-        FutureBase(const FuturePtr& future)
-            : m_future(future)
-        {}
-
-        FuturePtr m_future;
-    };
-
-}  // namespace detail
-
-template <typename T>
-class Future : public detail::FutureBase<T> 
-{
-public:
-    Future() {}
-
-    explicit Future(typename detail::FutureTraits<T>::rvalue_source_type t)
-        : detail::FutureBase<T>(std::shared_ptr<detail::PromptFutureObject<T> >(new detail::PromptFutureObject<T>(t)))
-    {}
-        
-    Future(const ExceptionPtr& e)
-        : detail::FutureBase<T>(e)
-    {}
-
-    virtual ~Future() {}
-    
-    template <typename R>
-    Future<R> then(const std::function<R(const Future<T>&)>& callback) const
-    {
-        // typedef typename detail::resolved_type<R>::type value_type;
-
-        if (!this->m_future)
-        {
-            throwException(FutureUninitializedException(__FILE__, __LINE__));
-        }
-
-        Promise<R> promise;
-        shared_ptr<detail::SequentialCallback<R, T>> ptr(new detail::SequentialCallback<R, T>(callback, promise));
-        
-        this->m_future->registerCallback(std::bind(&detail::SequentialCallback<R, T>::template run<R>, ptr));
-        return promise.getFuture();
-    }
-    
-
-    // template <typename R>
-    // Future<typename detail::resolved_type<R>::type> then(const std::function<R(const Future<T>&)>& callback) const
-    // {
-    //     typedef typename detail::resolved_type<R>::type value_type;
-
-    //     if (!this->m_future)
-    //     {
-    //         throwException(FutureUninitializedException(__FILE__, __LINE__));
-    //     }
-
-    //     Promise<value_type> promise;
-    //     this->m_future->registerCallback(TC_Bind(&detail::SequentialCallback<R, T>::template run<R>,
-    //                                           tc_owned(new detail::SequentialCallback<R, T>(callback, promise))));
-    //     return promise.getFuture();
-    // }
-    
-private:
-
-    Future(const typename detail::FutureBase<T>::FuturePtr& future)
-        : detail::FutureBase<T>(future)
-    {}
-
-    template <typename R, typename U> friend class detail::SequentialCallback;
-    friend class Promise<T>;
-};
-
-template <>
-class Future<void> : public detail::FutureBase<void> 
-{
-public:
-    Future() {}
-
-    Future(const ExceptionPtr& e)
-        : detail::FutureBase<void>(e)
-    {}
-
-    virtual ~Future() {}
-
-    template <typename R>
-    Future<typename detail::resolved_type<R>::type> then(const std::function<R(const Future<void>&)>& callback) const
-    {
-        typedef typename detail::resolved_type<R>::type value_type;
-
-        if (!this->m_future)
-        {
-            throwException(FutureUninitializedException(__FILE__, __LINE__));
-        }
-
-        Promise<value_type> promise;
-        this->m_future->registerCallback(TC_Bind(&detail::SequentialCallback<R, void>::template run<R>,
-                                              tc_owned(new detail::SequentialCallback<R, void>(callback, promise))));
-        return promise.getFuture();
-    }
-    
-private:
-
-    Future(const detail::FutureBase<void>::FuturePtr& future)
-        : detail::FutureBase<void>(future)
-    {}
-
-    friend Future<void> makeFuture();
-
-    template <typename R, typename U> friend class detail::SequentialCallback;
-    friend class Promise<void>;
-};
-
-template <typename T>
-// typename std::disable_if<std::is_void<T>, Future<T> >::type
-typename std::enable_if<!std::is_void<T>::value, Future<T> >::type
-makeFuture(typename detail::FutureTraits<T>::rvalue_source_type t)
-{
-    return Future<T>(t);
-}
-
-inline Future<void> makeFuture()
-{
-    return Future<void>(std::shared_ptr<detail::PromptFutureObject<void> >(new detail::PromptFutureObject<void>()));
-}
-
-template <typename T>
-class Promise 
-{
-public:
-
-    Promise()
-        : m_future(std::shared_ptr<detail::FutureObject<T> >(new detail::FutureObject<T>()))
-    {}
-    
-    void setValue(typename detail::FutureTraits<T>::rvalue_source_type v)
-    {
-        assert(m_future);
-        m_future->setValue(v);
-    }
-            
-    void setException(const ExceptionPtr& e)
-    {
-        m_future->setException(e);
-    }
-
-    Future<T> getFuture() const
-    {
-        return Future<T>(m_future);
-    }
-
-private:
-    std::shared_ptr<detail::FutureObjectInterface<T> > m_future;
-};
-
-template <>
-class Promise<void> 
-{
-private:
-    std::shared_ptr<detail::FutureObjectInterface<void> > m_future;
-public:
-
-    Promise()
-        : m_future(std::shared_ptr<detail::FutureObject<void> >(new detail::FutureObject<void>()))
-    {}
-    
-    void set()
-    {
-        assert(m_future);
-        m_future->set();
-    }
-            
-    void setException(const ExceptionPtr& e)
-    {
-        m_future->setException(e);
-    }
-
-    Future<void> getFuture() const
-    {
-        return Future<void>(m_future);
-    }
-};
-
-}  // namespace promise
-
-#endif  // __TARS_PROMISE_H_
diff --git a/servant/promise/promise_exception.h b/servant/promise/promise_exception.h
deleted file mode 100644
index 7313219..0000000
--- a/servant/promise/promise_exception.h
+++ /dev/null
@@ -1,200 +0,0 @@
-/**
- * Tencent is pleased to support the open source community by making Tars available.
- *
- * Copyright (C) 2016THL A29 Limited, a Tencent company. All rights reserved.
- *
- * Licensed under the BSD 3-Clause License (the "License"); you may not use this file except 
- * in compliance with the License. You may obtain a copy of the License at
- *
- * https://opensource.org/licenses/BSD-3-Clause
- *
- * Unless required by applicable law or agreed to in writing, software distributed 
- * under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR 
- * CONDITIONS OF ANY KIND, either express or implied. See the License for the 
- * specific language governing permissions and limitations under the License.
- */
-
-#ifndef __TARS_PROMISE_EXCEPTION_H_
-#define __TARS_PROMISE_EXCEPTION_H_
-
-#include <string.h>
-#include <exception>
-#include <string>
-#include <sstream>
-#include <memory>
-// #include "util/tc_shared_ptr.h"
-// #include "util/detail/tc_template_util.h"
-
-namespace tars 
-{
-
-class PromiseException : public std::exception 
-{
-public:
-
-    PromiseException()
-    : _filename(NULL)
-    , _line(0)
-    , _sep(':')
-    {}
-
-    PromiseException(const char *filename, int line)
-    : _filename(filename)
-    , _line(line)
-    , _sep(':')
-    {}
-
-    virtual ~PromiseException() throw() {}
-    
-    virtual const char *what() const throw()
-    {
-        try 
-        {
-            if (!_what.unique())
-                _what.reset(new std::string(*_what));
-
-            if (!_what || _what->empty()) 
-            {
-                std::stringstream ss;
-                ss << name() << " thrown";
-
-                if (_filename && _line > 0)
-                    ss << " at " << _filename << ':' << _line;
-
-                if (!_what)
-                    _what.reset(new std::string());
-
-                const std::string& s = getErrorInfo();
-                if (!s.empty()) 
-                {
-                    ss << _sep << ' ' << s;
-                    _sep = ';';
-                }
-                ss.str().swap(*_what);
-            }
-                
-            if (!_data.unique())
-                _data.reset(new std::string(*_data));
-
-            if (_data && !_data->empty()) 
-            {
-                *_what += _sep;
-                _sep = ';';
-                *_what += ' ';
-                _what->append(*_data);
-                _data.reset();
-            }
-            return _what->c_str();
-        } 
-        catch (...) 
-        {
-
-        }
-        return "";
-    }
-    
-private:
-
-    virtual const char *name() const
-    { 
-        return "PromiseException"; 
-    }
-
-    virtual std::string getErrorInfo() const
-    { 
-        return ""; 
-    }
-
-    const char *_filename;
-    int _line;
-
-    mutable std::shared_ptr<std::string> _what;
-    mutable std::shared_ptr<std::string> _data;
-    mutable char _sep;
-
-    template <typename T>
-    void injectErrorInfo(const T& t) const;
-    
-    template <typename Exception, typename T>
-    friend typename std::enable_if<std::is_base_of<Exception, PromiseException>::value, const Exception&>::type
-    operator<<(const Exception& e, const T& t)
-    {
-        e.injectErrorInfo(t);
-        return e;
-    }
-};
-
-template <typename T>
-void PromiseException::injectErrorInfo(const T& t) const
-{
-    std::stringstream ss;
-    ss << t;
-
-    if (!_data.unique())
-        _data.reset(new std::string(*_data));
-
-    if (!_data) 
-    {
-        _data.reset(new std::string(ss.str()));
-    } 
-    else 
-    {
-        (*_data) += ss.str();
-    }
-}
-
-namespace detail 
-{
-    inline std::string errnoToString(int errorno)
-    {
-        return strerror(errorno);
-    }
-
-}  // namespace detail
-
-class SyscallException : public PromiseException 
-{
-public:
-
-    SyscallException(const char *filename, int line, int err)
-    : PromiseException(filename, line)
-    , _errno(err)
-    {}
-
-    int error() const { return _errno; }
-
-protected:
-    
-    virtual const char *name() const
-    { 
-        return "SyscallException"; 
-    }
-
-    virtual std::string getErrorInfo() const
-    {
-        return detail::errnoToString(_errno);
-    }
-
-private:
-
-    int _errno;
-};
-    
-class AssertionFailureException : public PromiseException 
-{
-public:
-    AssertionFailureException(const char *filename, int line)
-        : PromiseException(filename, line)
-    {
-    }
-
-private:
-    virtual const char *name() const
-    {
-        return "AssertionFailureException";
-    }
-};
-
-}  // namespace promise
-
-#endif  // __TARS_PROMISE_EXCEPTION_H__
diff --git a/servant/promise/tuple.h b/servant/promise/tuple.h
deleted file mode 100644
index 684433b..0000000
--- a/servant/promise/tuple.h
+++ /dev/null
@@ -1,591 +0,0 @@
-#ifndef __TARS_PROMISE_TUPLE_H_
-#define __TARS_PROMISE_TUPLE_H_
-
-// #include "util/detail/tc_assert.h"
-#include <ostream>
-
-namespace tars 
-{
-    namespace detail 
-    {
-        struct null_type {};
-
-        inline bool operator==(const null_type&, const null_type&)
-        { return true; }
-
-        inline bool operator!=(const null_type&, const null_type&)
-        { return false; }
-
-        inline bool operator<(const null_type&, const null_type&)
-        { return false; }
-        
-        // A helper function to make a const temporary.
-        inline const null_type make_null() { return null_type(); }
-
-        template <typename HT, typename TT>
-        struct Cons 
-        {
-            typedef HT head_type;
-            typedef TT tail_type;
-
-            Cons()
-            : head()
-            , tail()
-            {}
-
-            Cons(const head_type& h, const tail_type& t)
-            : head(h)
-            , tail(t)
-            {}
-
-            template <typename T0, typename T1, typename T2, typename T3, typename T4,
-                      typename T5, typename T6, typename T7, typename T8, typename T9>
-            Cons(T0& t0, T1& t1, T2& t2, T3& t3, T4& t4,
-                 T5& t5, T6& t6, T7& t7, T8& t8, T9& t9)
-            : head(t0)
-            , tail(t1, t2, t3, t4, t5, t6, t7, t8, t9, make_null())
-            {}
-
-            template <typename HT2, typename TT2>
-            Cons(const Cons<HT2, TT2>& o)
-            : head(o.head)
-            , tail(o.tail)
-            {}
-            
-            template <typename HT2, typename TT2>
-            Cons& operator=(const Cons<HT2, TT2>& o)
-            {
-                head = o.head;
-                tail = o.tail;
-                return *this;
-            }
-
-            void swap(const Cons& o)
-            {
-                std::swap(head, o.head);
-                std::swap(tail, o.tail);
-            }
-
-            // Because the C++ standard prohibits the function template partial
-            // specialization, we have to define `operator==()' and `operator!=' as the
-            // member function.
-
-            bool operator==(const Cons& o) const
-            {
-                return head == o.head && tail == o.tail;
-            }
-
-            bool operator!=(const Cons& o) const
-            {
-                return !(operator==(o));
-            }
-            
-            bool operator<(const Cons& o) const
-            {
-                return (head < o.head) || (!(o.head < head) && tail < o.tail);
-            }
-            
-            head_type head;
-            tail_type tail;
-        };
-
-        template <typename HT>
-        struct Cons<HT, null_type> 
-        {
-            typedef HT head_type;
-            typedef null_type tail_type;
-
-            Cons()
-            : head()
-            {}
-
-            template <typename T0>
-            Cons(T0& t0, const null_type&, const null_type&, const null_type&, const null_type&,
-                 const null_type&, const null_type&, const null_type&, const null_type&, const null_type&)
-            : head(t0)
-            {}
-
-            template <typename HT2>
-            Cons& operator=(const Cons<HT2, null_type>& o)
-            {
-                head = o.head;
-                return *this;
-            }
-
-            void swap(Cons& o)
-            {
-                std::swap(head, o.head);
-            }
-            
-            // Because the C++ standard prohibits the function template partial
-            // specialization, we have to define `operator==()' and `operator!=' as the
-            // member function.
-
-            bool operator==(const Cons& o) const
-            {
-                return head == o.head;
-            }
-
-            bool operator!=(const Cons& o) const
-            {
-                return !(operator==(o));
-            }
-
-            bool operator<(const Cons& o) const
-            {
-                return head < o.head;
-            }
-            
-            head_type head;
-        };
-        
-        template <typename T0, typename T1, typename T2, typename T3, typename T4,
-                  typename T5, typename T6, typename T7, typename T8, typename T9>
-        struct map_tuple_to_cons 
-        {
-            typedef Cons<T0, typename map_tuple_to_cons<T1, T2, T3, T4, T5, T6, T7, T8, T9, null_type>::type> type;
-        };
-
-        template <>
-        struct map_tuple_to_cons<null_type, null_type, null_type, null_type, null_type,
-                                 null_type, null_type, null_type, null_type, null_type> 
-        {
-            typedef null_type type;
-        };
-
-        // Gets the N-th tail of a tuple.
-        template <int N, typename Tuple>
-        struct drop_front 
-        {
-            typedef typename drop_front<N-1, Tuple>::type::tail_type type;
-            static const type& get_tail(const Tuple& tuple)
-            {
-                return drop_front<N-1, Tuple>::get_tail(tuple).tail;
-            }
-        };
-
-        template <typename Tuple>
-        struct drop_front<0, Tuple> 
-        {
-            typedef Tuple type;
-            static const type& get_tail(const Tuple& tuple)
-            {
-                return tuple;
-            }
-        };
-
-        // Gets the type of the N-th element of a tuple.
-        template <int N, typename Tuple>
-        struct element 
-        {
-            typedef typename drop_front<N, Tuple>::type::head_type type;
-        };
-
-        // Gets the length of a tuple.
-        template <typename Tuple>
-        struct length 
-        {
-            static const int value = length<typename Tuple::tail_type>::value + 1;
-        };
-
-        template <>
-        struct length<null_type> 
-        {
-            static const int value = 0;
-        };
-
-        // Helper classes to print Cons.
-        template <typename HT, typename TT>
-        struct print_cons_helper 
-        {
-            static std::ostream& print(std::ostream& o, const Cons<HT, TT>& cons)
-            {
-                o << cons.head;
-                o << ", ";
-                print_cons_helper<typename TT::head_type, typename TT::tail_type>::print(o, cons.tail);
-                return o;
-            }
-        };
-
-        template <typename HT>
-        struct print_cons_helper<HT, null_type> 
-        {
-            static std::ostream& print(std::ostream& o, const Cons<HT, null_type>& cons)
-            {
-                o << cons.head;
-                return o;
-            }
-        };
-
-        template <typename HT, typename TT>
-        inline std::ostream& print_cons(std::ostream& o, const Cons<HT, TT>& cons)
-        {
-            return print_cons_helper<HT, TT>::print(o, cons);
-        }
-
-        inline std::ostream& print_cons(std::ostream& o, const null_type&)
-        {
-            return o;
-        }
-        
-    }  // namespace detail
-
-    template <typename T0 = detail::null_type, typename T1 = detail::null_type, typename T2 = detail::null_type,
-              typename T3 = detail::null_type, typename T4 = detail::null_type, typename T5 = detail::null_type,
-              typename T6 = detail::null_type, typename T7 = detail::null_type, typename T8 = detail::null_type,
-              typename T9 = detail::null_type>
-    class Tuple 
-    {
-    private:
-        typedef typename detail::map_tuple_to_cons<T0, T1, T2, T3, T4, T5, T6, T7, T8, T9>::type tuple_impl_type;
-
-    public:
-        
-        // Returns the type of the N-th element of this tuple.
-        template <int N>
-        struct element 
-        {
-            typedef typename detail::element<N, tuple_impl_type>::type type;
-        };
-        
-        template <typename T>
-        struct access_traits 
-        {
-            typedef const T& parameter_type;
-            typedef const T& const_type;
-            typedef T& non_const_type;
-        };
-
-        template <typename T>
-        struct access_traits<T&> 
-        {
-            typedef T& parameter_type;
-            typedef T& const_type;
-            typedef T& non_const_type;
-        };
-
-        // Number of elements of this tuple.
-        enum 
-        {
-            LENGTH = detail::length<tuple_impl_type>::value
-        };
-            
-        Tuple() {}
-
-        Tuple(typename access_traits<T0>::parameter_type t0)
-        : m_tuple_impl(t0, detail::make_null(), detail::make_null(), detail::make_null(), detail::make_null(),
-             detail::make_null(), detail::make_null(), detail::make_null(), detail::make_null(), detail::make_null())
-        {}
-
-        Tuple(typename access_traits<T0>::parameter_type t0,
-              typename access_traits<T1>::parameter_type t1)
-        : m_tuple_impl(t0, t1, detail::make_null(), detail::make_null(), detail::make_null(),
-             detail::make_null(), detail::make_null(), detail::make_null(), detail::make_null(), detail::make_null())
-        {}
-
-        Tuple(typename access_traits<T0>::parameter_type t0,
-              typename access_traits<T1>::parameter_type t1,
-              typename access_traits<T2>::parameter_type t2)
-        : m_tuple_impl(t0, t1, t2, detail::make_null(), detail::make_null(),
-             detail::make_null(), detail::make_null(), detail::make_null(), detail::make_null(), detail::make_null())
-        {}
-
-        Tuple(typename access_traits<T0>::parameter_type t0,
-              typename access_traits<T1>::parameter_type t1,
-              typename access_traits<T2>::parameter_type t2,
-              typename access_traits<T3>::parameter_type t3)
-        : m_tuple_impl(t0, t1, t2, t3, detail::make_null(), detail::make_null(), detail::make_null(), detail::make_null(),
-             detail::make_null(), detail::make_null())
-        {}
-
-        Tuple(typename access_traits<T0>::parameter_type t0,
-              typename access_traits<T1>::parameter_type t1,
-              typename access_traits<T2>::parameter_type t2,
-              typename access_traits<T3>::parameter_type t3,
-              typename access_traits<T4>::parameter_type t4)
-        : m_tuple_impl(t0, t1, t2, t3, t4, detail::make_null(), detail::make_null(), detail::make_null(),
-             detail::make_null(), detail::make_null())
-        {}
-        
-        Tuple(typename access_traits<T0>::parameter_type t0,
-              typename access_traits<T1>::parameter_type t1,
-              typename access_traits<T2>::parameter_type t2,
-              typename access_traits<T3>::parameter_type t3,
-              typename access_traits<T4>::parameter_type t4,
-              typename access_traits<T5>::parameter_type t5)
-        : m_tuple_impl(t0, t1, t2, t3, t4, t5, detail::make_null(), detail::make_null(),
-             detail::make_null(), detail::make_null())
-        {}
-        
-        Tuple(typename access_traits<T0>::parameter_type t0,
-              typename access_traits<T1>::parameter_type t1,
-              typename access_traits<T2>::parameter_type t2,
-              typename access_traits<T3>::parameter_type t3,
-              typename access_traits<T4>::parameter_type t4,
-              typename access_traits<T5>::parameter_type t5,
-              typename access_traits<T6>::parameter_type t6)
-        : m_tuple_impl(t0, t1, t2, t3, t4, t5, t6, detail::make_null(), detail::make_null(), detail::make_null())
-        {}
-        
-        Tuple(typename access_traits<T0>::parameter_type t0,
-              typename access_traits<T1>::parameter_type t1,
-              typename access_traits<T2>::parameter_type t2,
-              typename access_traits<T3>::parameter_type t3,
-              typename access_traits<T4>::parameter_type t4,
-              typename access_traits<T5>::parameter_type t5,
-              typename access_traits<T6>::parameter_type t6,
-              typename access_traits<T7>::parameter_type t7)
-        : m_tuple_impl(t0, t1, t2, t3, t4, t5, t6, t7, detail::make_null(), detail::make_null())
-        {}
-        
-        Tuple(typename access_traits<T0>::parameter_type t0,
-              typename access_traits<T1>::parameter_type t1,
-              typename access_traits<T2>::parameter_type t2,
-              typename access_traits<T3>::parameter_type t3,
-              typename access_traits<T4>::parameter_type t4,
-              typename access_traits<T5>::parameter_type t5,
-              typename access_traits<T6>::parameter_type t6,
-              typename access_traits<T7>::parameter_type t7,
-              typename access_traits<T8>::parameter_type t8)
-        : m_tuple_impl(t0, t1, t2, t3, t4, t5, t6, t7, t8, detail::make_null())
-        {}
-        
-        Tuple(typename access_traits<T0>::parameter_type t0,
-              typename access_traits<T1>::parameter_type t1,
-              typename access_traits<T2>::parameter_type t2,
-              typename access_traits<T3>::parameter_type t3,
-              typename access_traits<T4>::parameter_type t4,
-              typename access_traits<T5>::parameter_type t5,
-              typename access_traits<T6>::parameter_type t6,
-              typename access_traits<T7>::parameter_type t7,
-              typename access_traits<T8>::parameter_type t8,
-              typename access_traits<T9>::parameter_type t9)
-        : m_tuple_impl(t0, t1, t2, t3, t4, t5, t6, t7, t8, t9)
-        {}
-
-        template <typename TT0, typename TT1, typename TT2, typename TT3, typename TT4,
-                  typename TT5, typename TT6, typename TT7, typename TT8, typename TT9>
-        Tuple(const Tuple<TT0, TT1, TT2, TT3, TT4, TT5, TT6, TT7, TT8, TT9>& o)
-        : m_tuple_impl(o.m_tuple_impl)
-        {}
-        
-        template <typename TT0, typename TT1, typename TT2, typename TT3, typename TT4,
-                  typename TT5, typename TT6, typename TT7, typename TT8, typename TT9>
-        Tuple& operator=(const Tuple<TT0, TT1, TT2, TT3, TT4, TT5, TT6, TT7, TT8, TT9>& o)
-        {
-            m_tuple_impl = o.m_tuple_impl;
-            return *this;
-        }
-        
-        template <int N>
-        typename access_traits<typename element<N>::type>::const_type
-        get() const
-        {
-            TC_STATIC_ASSERT(N < LENGTH, index_out_of_bounds);
-            return detail::drop_front<N, tuple_impl_type>::get_tail(m_tuple_impl).head;
-        }
-
-        template <int N>
-        typename access_traits<typename element<N>::type>::non_const_type
-        get()
-        {
-            TC_STATIC_ASSERT(N < LENGTH, index_out_of_bounds);
-            typedef detail::drop_front<N, tuple_impl_type> impl;
-            typedef typename impl::type cons_element;
-            return const_cast<cons_element&>(impl::get_tail(m_tuple_impl)).head;
-        }
-
-        void swap(Tuple& o)
-        {
-            m_tuple_impl.swap(o.m_tuple_impl);
-        }
-
-    private:
-        tuple_impl_type m_tuple_impl;
-
-        template <typename TT0, typename TT1, typename TT2, typename TT3, typename TT4,
-                  typename TT5, typename TT6, typename TT7, typename TT8, typename TT9>
-        friend class Tuple;
-
-        friend bool operator==(const Tuple& lhs, const Tuple& rhs)
-        {
-            return lhs.m_tuple_impl == rhs.m_tuple_impl;
-        }
-
-        friend bool operator!=(const Tuple& lhs, const Tuple& rhs)
-        {
-            return lhs.m_tuple_impl != rhs.m_tuple_impl;
-        }
-
-        friend bool operator<(const Tuple& lhs, const Tuple& rhs)
-        {
-            return lhs.m_tuple_impl < rhs.m_tuple_impl;
-        }
-
-        friend std::ostream& operator<<(std::ostream& o, const Tuple& t)
-        {
-            o << '(';
-            detail::print_cons(o, t.m_tuple_impl);
-            o << ')';
-            return o;
-        }
-    };
-    
-    namespace detail 
-    {
-        // Call traits for make_tuple
-        //
-        // Conversions:
-        //   T -> T
-        //   T& -> T
-        //   const T& -> T
-        //   T[] -> const T*
-        //   const T[] -> const T*
-
-        template <typename T>
-        struct make_tuple_traits 
-        {
-            typedef T type;
-        };
-
-        template <typename T>
-        struct make_tuple_traits<T&> 
-        {
-            typedef T type;
-        };
-
-        // To produce compilation error intentionally by referencing an non-exsitent
-        // member of this class.
-        template <typename T>
-        class generate_error {};
-        
-        template <typename T, size_t n>
-        struct make_tuple_traits<T[n]> 
-        {
-            typedef const T* type;
-        };
-
-        template <typename T>
-        struct make_tuple_traits<const T[]> 
-        {
-            typedef const T* type;
-        };
-        
-        template <typename T0 = null_type, typename T1 = null_type, typename T2 = null_type,
-                  typename T3 = null_type, typename T4 = null_type, typename T5 = null_type,
-                  typename T6 = null_type, typename T7 = null_type, typename T8 = null_type,
-                  typename T9 = null_type>
-        struct make_tuple_mapper 
-        {
-            typedef Tuple<typename make_tuple_traits<T0>::type,
-                          typename make_tuple_traits<T1>::type,
-                          typename make_tuple_traits<T2>::type,
-                          typename make_tuple_traits<T3>::type,
-                          typename make_tuple_traits<T4>::type,
-                          typename make_tuple_traits<T5>::type,
-                          typename make_tuple_traits<T6>::type,
-                          typename make_tuple_traits<T7>::type,
-                          typename make_tuple_traits<T8>::type,
-                          typename make_tuple_traits<T9>::type> type;
-        };
-
-    }  // namespace detail
-
-    // make_tuple function templates for arities 0~10
-
-    inline Tuple<> make_tuple()
-    { return Tuple<>(); }
-
-    template <typename T0>
-    inline typename detail::make_tuple_mapper<T0>::type
-    make_tuple(const T0& t0)
-    {
-        typedef typename detail::make_tuple_mapper<T0>::type tuple_type;
-        return tuple_type(t0);
-    }
-
-    template <typename T0, typename T1>
-    inline typename detail::make_tuple_mapper<T0, T1>::type
-    make_tuple(const T0& t0, const T1& t1)
-    {
-        typedef typename detail::make_tuple_mapper<T0, T1>::type tuple_type;
-        return tuple_type(t0, t1);
-    }
-    
-    template <typename T0, typename T1, typename T2>
-    inline typename detail::make_tuple_mapper<T0, T1, T2>::type
-    make_tuple(const T0& t0, const T1& t1, const T2& t2)
-    {
-        typedef typename detail::make_tuple_mapper<T0, T1, T2>::type tuple_type;
-        return tuple_type(t0, t1, t2);
-    }
-    
-    template <typename T0, typename T1, typename T2, typename T3>
-    inline typename detail::make_tuple_mapper<T0, T1, T2, T3>::type
-    make_tuple(const T0& t0, const T1& t1, const T2& t2, const T3& t3)
-    {
-        typedef typename detail::make_tuple_mapper<T0, T1, T2, T3>::type tuple_type;
-        return tuple_type(t0, t1, t2, t3);
-    }
-    
-    template <typename T0, typename T1, typename T2, typename T3, typename T4>
-    inline typename detail::make_tuple_mapper<T0, T1, T2, T3, T4>::type
-    make_tuple(const T0& t0, const T1& t1, const T2& t2, const T3& t3, const T4& t4)
-    {
-        typedef typename detail::make_tuple_mapper<T0, T1, T2, T3, T4>::type tuple_type;
-        return tuple_type(t0, t1, t2, t3, t4);
-    }
-    
-    template <typename T0, typename T1, typename T2, typename T3, typename T4,
-              typename T5>
-    inline typename detail::make_tuple_mapper<T0, T1, T2, T3, T4, T5>::type
-    make_tuple(const T0& t0, const T1& t1, const T2& t2, const T3& t3, const T4& t4,
-               const T5& t5)
-    {
-        typedef typename detail::make_tuple_mapper<T0, T1, T2, T3, T4, T5>::type tuple_type;
-        return tuple_type(t0, t1, t2, t3, t4, t5);
-    }
-    
-    template <typename T0, typename T1, typename T2, typename T3, typename T4,
-              typename T5, typename T6>
-    inline typename detail::make_tuple_mapper<T0, T1, T2, T3, T4, T5, T6>::type
-    make_tuple(const T0& t0, const T1& t1, const T2& t2, const T3& t3, const T4& t4,
-               const T5& t5, const T6& t6)
-    {
-        typedef typename detail::make_tuple_mapper<T0, T1, T2, T3, T4, T5, T6>::type tuple_type;
-        return tuple_type(t0, t1, t2, t3, t4, t5, t6);
-    }
-    
-    template <typename T0, typename T1, typename T2, typename T3, typename T4,
-              typename T5, typename T6, typename T7>
-    inline typename detail::make_tuple_mapper<T0, T1, T2, T3, T4, T5, T6, T7>::type
-    make_tuple(const T0& t0, const T1& t1, const T2& t2, const T3& t3, const T4& t4,
-               const T5& t5, const T6& t6, const T7& t7)
-    {
-        typedef typename detail::make_tuple_mapper<T0, T1, T2, T3, T4, T5, T6, T7>::type tuple_type;
-        return tuple_type(t0, t1, t2, t3, t4, t5, t6, t7);
-    }
-    
-    template <typename T0, typename T1, typename T2, typename T3, typename T4,
-              typename T5, typename T6, typename T7, typename T8>
-    inline typename detail::make_tuple_mapper<T0, T1, T2, T3, T4, T5, T6, T7, T8>::type
-    make_tuple(const T0& t0, const T1& t1, const T2& t2, const T3& t3, const T4& t4,
-               const T5& t5, const T6& t6, const T7& t7, const T8& t8)
-    {
-        typedef typename detail::make_tuple_mapper<T0, T1, T2, T3, T4, T5, T6, T7, T8>::type tuple_type;
-        return tuple_type(t0, t1, t2, t3, t4, t5, t6, t7, t8);
-    }
-    
-    template <typename T0, typename T1, typename T2, typename T3, typename T4,
-              typename T5, typename T6, typename T7, typename T8, typename T9>
-    inline typename detail::make_tuple_mapper<T0, T1, T2, T3, T4, T5, T6, T7, T8, T9>::type
-    make_tuple(const T0& t0, const T1& t1, const T2& t2, const T3& t3, const T4& t4,
-               const T5& t5, const T6& t6, const T7& t7, const T8& t8, const T9& t9)
-    {
-        typedef typename detail::make_tuple_mapper<T0, T1, T2, T3, T4, T5, T6, T7, T8, T9>::type tuple_type;
-        return tuple_type(t0, t1, t2, t3, t4, t5, t6, t7, t8, t9);
-    }
-    
-}  // namespace promise
-
-#endif  // __TARS_PROMISE_TUPLE_H__
diff --git a/servant/promise/when_all.h b/servant/promise/when_all.h
deleted file mode 100644
index 9efed10..0000000
--- a/servant/promise/when_all.h
+++ /dev/null
@@ -1,334 +0,0 @@
-/**
- * Tencent is pleased to support the open source community by making Tars available.
- *
- * Copyright (C) 2016THL A29 Limited, a Tencent company. All rights reserved.
- *
- * Licensed under the BSD 3-Clause License (the "License"); you may not use this file except 
- * in compliance with the License. You may obtain a copy of the License at
- *
- * https://opensource.org/licenses/BSD-3-Clause
- *
- * Unless required by applicable law or agreed to in writing, software distributed 
- * under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR 
- * CONDITIONS OF ANY KIND, either express or implied. See the License for the 
- * specific language governing permissions and limitations under the License.
- */
-
-#ifndef __TARS_PROMISE_WHEN_ALL_H_
-#define __TARS_PROMISE_WHEN_ALL_H_
-
-#include "promise.h"
-#include <vector>
-// #include "std::tuple.h"
-#include "util/tc_monitor.h"
-// #include "util/tc_shared_ptr.h"
-// #include "util/detail/assert.h"
-namespace tars 
-{
-    namespace detail 
-    {
-        // Callback implementation for parallel composition of futures.       
-        template <typename FutureAllValueType>
-        struct ParallelAllCallbackBase 
-        {
-        public:
-            typedef Promise<FutureAllValueType> PromiseAll;
-                
-            ParallelAllCallbackBase(const PromiseAll& promise_all,
-                                 size_t number_of_non_satisfied)
-            : m_number_of_non_satisfied(number_of_non_satisfied)
-            , m_promise_all(promise_all)
-            {
-            }
-
-            virtual ~ParallelAllCallbackBase()
-            {
-            }
-
-            size_t m_number_of_non_satisfied;
-            PromiseAll m_promise_all;
-            FutureAllValueType m_waiting_futures;
-            TC_ThreadLock  m_monitor;
-
-        private:
-            ParallelAllCallbackBase(const ParallelAllCallbackBase&);
-            void operator=(const ParallelAllCallbackBase&);
-            
-        };
-
-        // FutureAllValueType is supposed to be of type tars::std::tuple<tars::Future, ...> or
-        // std::vector<tars::Future>.
-        //
-        // This implementation is for tars::std::tuple<>.
-        template <typename FutureAllValueType>
-        class ParallelAllCallback : private ParallelAllCallbackBase<FutureAllValueType> 
-        {
-        public:
-            typedef typename ParallelAllCallbackBase<FutureAllValueType>::PromiseAll PromiseAll;
-            
-            ParallelAllCallback(const PromiseAll& promise_all)
-            : ParallelAllCallbackBase<FutureAllValueType>(promise_all, FutureAllValueType::LENGTH)
-            {}
-
-            virtual ~ParallelAllCallback() {}
-        
-            template <int N>
-            void on_future(const typename FutureAllValueType::template element<N>::type& future)
-            {
-                // Note: this future must be recorded no matter what exception is thrown.
-                TC_ThreadLock::Lock lock(this->m_monitor);
-                this->m_waiting_futures.template get<N>() = future;
-                assert(this->m_number_of_non_satisfied > 0);
-                if (--this->m_number_of_non_satisfied == 0) 
-                {
-                    lock.release();
-                    try 
-                    {
-                        this->m_promise_all.setValue(this->m_waiting_futures);
-                    } 
-                    catch (...) 
-                    {
-                        this->m_promise_all.setException(currentException());
-                    }
-                    return;
-                }
-            }
-
-        private:
-            ParallelAllCallback(const ParallelAllCallback&);
-            void operator=(const ParallelAllCallback&);
-            
-        };
-
-        // This implementation is specialized for std::vector<tars::Future<> >.
-        template <typename FutureType>
-        class ParallelAllCallback<std::vector<FutureType> > : private ParallelAllCallbackBase<std::vector<FutureType> > 
-        {
-        public:
-            typedef typename ParallelAllCallbackBase<std::vector<FutureType> >::PromiseAll PromiseAll;
-            
-            ParallelAllCallback(const PromiseAll& promise_all,
-                             size_t number_of_non_satisfied)
-            : ParallelAllCallbackBase<std::vector<FutureType> >(promise_all, number_of_non_satisfied)
-            {
-                this->m_waiting_futures.resize(number_of_non_satisfied);
-            }
-
-            virtual ~ParallelAllCallback() {}
-        
-            void on_future(const FutureType& future, size_t idx)
-            {
-                // Note: this future must be recorded no matter what exception is thrown.
-                assert(idx < this->m_waiting_futures.size());
-
-                TC_ThreadLock::Lock lock(this->m_monitor);
-                this->m_waiting_futures[idx] = future;
-                assert(this->m_number_of_non_satisfied > 0);
-                if (--this->m_number_of_non_satisfied == 0) 
-                {
-                    lock.release();
-                    try 
-                    {
-                        this->m_promise_all.setValue(this->m_waiting_futures);
-                    } 
-                    catch (...) 
-                    {
-                        this->m_promise_all.setException(tars::currentException());
-                    }
-                    return;
-                }
-            }
-            
-        private:
-            ParallelAllCallback(const ParallelAllCallback&);
-            void operator=(const ParallelAllCallback&);
-            
-        };
-
-        // A helper class to notify ParallelAllCallback<std::vector<> > which future is done.
-        template <typename T>
-        class VectorParallelCallback 
-        {
-        public:
-            VectorParallelCallback(const std::shared_ptr<ParallelAllCallback<std::vector<Future<T> > > >& cb, size_t idx)
-                : m_parallel_callback(cb),
-                  m_idx(idx)
-            {}
-
-            void on_future(const Future<T>& future)
-            {
-                m_parallel_callback->on_future(future, m_idx);
-            }
-
-        private:
-            std::shared_ptr<ParallelAllCallback<std::vector<Future<T> > > > m_parallel_callback;
-            size_t m_idx;
-        };
-        
-    }  // namespace detail
-    
-    /**
-     * Parallelly composite two or more futues. Only when all futures are satisfied is
-     * the composited future satisfied.
-     */
-    template <typename T1, typename T2>
-    Future<std::tuple<Future<T1>, Future<T2> > >
-    whenAll(const Future<T1>& future1, const Future<T2>& future2)
-    {
-        typedef std::tuple<Future<T1>, Future<T2> > FutureAllValueType;
-        typedef Promise<FutureAllValueType> PromiseAll;
-        typedef detail::ParallelAllCallback<FutureAllValueType> WhenAllCallback;
-
-        PromiseAll promise_all;
-        std::shared_ptr<WhenAllCallback> future_callback(new WhenAllCallback(promise_all));
-        future1.then(std::bind(&WhenAllCallback::template on_future<0>, (future_callback)));
-        future2.then(std::bind(&WhenAllCallback::template on_future<1>, (future_callback)));
-        return promise_all.getFuture();
-    }
-
-    template <typename T1, typename T2, typename T3>
-    Future<std::tuple<Future<T1>, Future<T2>, Future<T3> > >
-    whenAll(const Future<T1>& future1, const Future<T2>& future2, const Future<T3>& future3)
-    {
-        typedef std::tuple<Future<T1>, Future<T2>, Future<T3> > FutureAllValueType;
-        typedef Promise<FutureAllValueType> PromiseAll;
-        typedef detail::ParallelAllCallback<FutureAllValueType> WhenAllCallback;
-
-        PromiseAll promise_all;
-        std::shared_ptr<WhenAllCallback> future_callback(new WhenAllCallback(promise_all));
-        future1.then(std::bind(&WhenAllCallback::template on_future<0>, (future_callback)));
-        future2.then(std::bind(&WhenAllCallback::template on_future<1>, (future_callback)));
-        future3.then(std::bind(&WhenAllCallback::template on_future<2>, (future_callback)));
-        return promise_all.getFuture();
-    }
-
-    template <typename T1, typename T2, typename T3, typename T4>
-    Future<std::tuple<Future<T1>, Future<T2>, Future<T3>, Future<T4> > >
-    whenAll(const Future<T1>& future1, const Future<T2>& future2, const Future<T3>& future3, const Future<T4>& future4)
-    {
-        typedef std::tuple<Future<T1>, Future<T2>, Future<T3>, Future<T4> > FutureAllValueType;
-        typedef Promise<FutureAllValueType> PromiseAll;
-        typedef detail::ParallelAllCallback<FutureAllValueType> WhenAllCallback;
-
-        PromiseAll promise_all;
-        std::shared_ptr<WhenAllCallback> future_callback(new WhenAllCallback(promise_all));
-        future1.then(std::bind(&WhenAllCallback::template on_future<0>, (future_callback)));
-        future2.then(std::bind(&WhenAllCallback::template on_future<1>, (future_callback)));
-        future3.then(std::bind(&WhenAllCallback::template on_future<2>, (future_callback)));
-        future4.then(std::bind(&WhenAllCallback::template on_future<3>, (future_callback)));
-        return promise_all.getFuture();
-    }
-
-    template <typename T1, typename T2, typename T3, typename T4, typename T5>
-    Future<std::tuple<Future<T1>, Future<T2>, Future<T3>, Future<T4>, Future<T5> > >
-    whenAll(const Future<T1>& future1, const Future<T2>& future2, const Future<T3>& future3, const Future<T4>& future4,
-            const Future<T5>& future5)
-    {
-        typedef std::tuple<Future<T1>, Future<T2>, Future<T3>, Future<T4>, Future<T5> > FutureAllValueType;
-        typedef Promise<FutureAllValueType> PromiseAll;
-        typedef detail::ParallelAllCallback<FutureAllValueType> WhenAllCallback;
-
-        PromiseAll promise_all;
-        std::shared_ptr<WhenAllCallback> future_callback(new WhenAllCallback(promise_all));
-        future1.then(std::bind(&WhenAllCallback::template on_future<0>, (future_callback)));
-        future2.then(std::bind(&WhenAllCallback::template on_future<1>, (future_callback)));
-        future3.then(std::bind(&WhenAllCallback::template on_future<2>, (future_callback)));
-        future4.then(std::bind(&WhenAllCallback::template on_future<3>, (future_callback)));
-        future5.then(std::bind(&WhenAllCallback::template on_future<4>, (future_callback)));
-        return promise_all.getFuture();
-    }
-
-    template <typename T1, typename T2, typename T3, typename T4, typename T5, typename T6>
-    Future<std::tuple<Future<T1>, Future<T2>, Future<T3>, Future<T4>, Future<T5>, Future<T6> > >
-    whenAll(const Future<T1>& future1, const Future<T2>& future2, const Future<T3>& future3, const Future<T4>& future4,
-            const Future<T5>& future5, const Future<T6>& future6)
-    {
-        typedef std::tuple<Future<T1>, Future<T2>, Future<T3>, Future<T4>, Future<T5>, Future<T6> > FutureAllValueType;
-        typedef Promise<FutureAllValueType> PromiseAll;
-        typedef detail::ParallelAllCallback<FutureAllValueType> WhenAllCallback;
-
-        PromiseAll promise_all;
-        std::shared_ptr<WhenAllCallback> future_callback(new WhenAllCallback(promise_all));
-        future1.then(std::bind(&WhenAllCallback::template on_future<0>, (future_callback)));
-        future2.then(std::bind(&WhenAllCallback::template on_future<1>, (future_callback)));
-        future3.then(std::bind(&WhenAllCallback::template on_future<2>, (future_callback)));
-        future4.then(std::bind(&WhenAllCallback::template on_future<3>, (future_callback)));
-        future5.then(std::bind(&WhenAllCallback::template on_future<4>, (future_callback)));
-        future6.then(std::bind(&WhenAllCallback::template on_future<5>, (future_callback)));
-        return promise_all.getFuture();
-    }
-
-    template <typename T1, typename T2, typename T3, typename T4, typename T5, typename T6, typename T7>
-    Future<std::tuple<Future<T1>, Future<T2>, Future<T3>, Future<T4>, Future<T5>, Future<T6>, Future<T7> > >
-    whenAll(const Future<T1>& future1, const Future<T2>& future2, const Future<T3>& future3, const Future<T4>& future4,
-            const Future<T5>& future5, const Future<T6>& future6, const Future<T7>& future7)
-    {
-        typedef std::tuple<Future<T1>, Future<T2>, Future<T3>, Future<T4>, Future<T5>, Future<T6>, Future<T7> > FutureAllValueType;
-        typedef Promise<FutureAllValueType> PromiseAll;
-        typedef detail::ParallelAllCallback<FutureAllValueType> WhenAllCallback;
-
-        PromiseAll promise_all;
-        std::shared_ptr<WhenAllCallback> future_callback(new WhenAllCallback(promise_all));
-        future1.then(std::bind(&WhenAllCallback::template on_future<0>, (future_callback)));
-        future2.then(std::bind(&WhenAllCallback::template on_future<1>, (future_callback)));
-        future3.then(std::bind(&WhenAllCallback::template on_future<2>, (future_callback)));
-        future4.then(std::bind(&WhenAllCallback::template on_future<3>, (future_callback)));
-        future5.then(std::bind(&WhenAllCallback::template on_future<4>, (future_callback)));
-        future6.then(std::bind(&WhenAllCallback::template on_future<5>, (future_callback)));
-        future7.then(std::bind(&WhenAllCallback::template on_future<6>, (future_callback)));
-        return promise_all.getFuture();
-    }
-
-    template <typename T1, typename T2, typename T3, typename T4, typename T5, typename T6, typename T7, typename T8>
-    Future<std::tuple<Future<T1>, Future<T2>, Future<T3>, Future<T4>, Future<T5>, Future<T6>, Future<T7>, Future<T8> > >
-    whenAll(const Future<T1>& future1, const Future<T2>& future2, const Future<T3>& future3, const Future<T4>& future4,
-            const Future<T5>& future5, const Future<T6>& future6, const Future<T7>& future7, const Future<T8>& future8)
-    {
-        typedef std::tuple<Future<T1>, Future<T2>, Future<T3>, Future<T4>, Future<T5>, Future<T6>, Future<T7>, Future<T8> > FutureAllValueType;
-        typedef Promise<FutureAllValueType> PromiseAll;
-        typedef detail::ParallelAllCallback<FutureAllValueType> WhenAllCallback;
-
-        PromiseAll promise_all;
-        std::shared_ptr<WhenAllCallback> future_callback(new WhenAllCallback(promise_all));
-        future1.then(std::bind(&WhenAllCallback::template on_future<0>, (future_callback)));
-        future2.then(std::bind(&WhenAllCallback::template on_future<1>, (future_callback)));
-        future3.then(std::bind(&WhenAllCallback::template on_future<2>, (future_callback)));
-        future4.then(std::bind(&WhenAllCallback::template on_future<3>, (future_callback)));
-        future5.then(std::bind(&WhenAllCallback::template on_future<4>, (future_callback)));
-        future6.then(std::bind(&WhenAllCallback::template on_future<5>, (future_callback)));
-        future7.then(std::bind(&WhenAllCallback::template on_future<6>, (future_callback)));
-        future8.then(std::bind(&WhenAllCallback::template on_future<7>, (future_callback)));
-        return promise_all.getFuture();
-    }
-
-    template <typename T, typename InputIterator>
-    Future<std::vector<Future<T> > >
-    whenAll(InputIterator first, InputIterator last)
-    {
-        typedef std::vector<Future<T> > FutureAllValueType;
-        typedef Promise<FutureAllValueType> PromiseAll;
-        typedef detail::ParallelAllCallback<FutureAllValueType> WhenAllCallback;
-
-        PromiseAll promise_all;
-        if (first == last) 
-        {
-            promise_all.setValue(FutureAllValueType());
-        } 
-        else 
-        {
-            std::shared_ptr<WhenAllCallback> when_all_callback(new WhenAllCallback(promise_all, std::distance(first, last)));
-            size_t i;
-
-            for (i = 0; first != last; ++first, ++i) 
-            {
-                std::shared_ptr<detail::VectorParallelCallback<T>> ptr(new detail::VectorParallelCallback<T>(when_all_callback, i)); 
-                first->then(std::bind(&detail::VectorParallelCallback<T>::on_future, ptr));
-                                    //   tars::tc_owned(new detail::VectorParallelCallback<T>(when_all_callback, i))));
-            }
-        }
-        return promise_all.getFuture();
-    }
-    
-}  // namespace promise
-
-#endif  // __TARS_PROMISE_WHEN_ALL_H__
diff --git a/tools/tars2cpp/main.cpp b/tools/tars2cpp/main.cpp
index 73e05d3..101a780 100644
--- a/tools/tars2cpp/main.cpp
+++ b/tools/tars2cpp/main.cpp
@@ -29,7 +29,7 @@ void usage()
     cout << "  --unjson                                    not json interface" << endl;
     cout << "  --os                                        only create struct(not create interface) " << endl;
     cout << "  --include=\"dir1;dir2;dir3\"                set search path of tars protocol" << endl;
-    cout << "  --unknown                                   create unkown field" << endl;
+    // cout << "  --unknown                                   create unkown field" << endl;
     cout << "  --tarsMaster                                create get registry info interface" << endl;
     cout << "  --currentPriority						   use current path first." << endl;
     cout << "  tars2cpp support type: bool byte short int long float double vector map" << endl;
@@ -123,7 +123,7 @@ int main(int argc, char* argv[])
         g_parse->setHeader(option.getValue("header"));
         g_parse->setCurrentPriority(option.hasParam("currentPriority"));
 
-        t2c.setUnknownField(option.hasParam("unknown"));
+        // t2c.setUnknownField(option.hasParam("unknown"));
         for(size_t i = 0; i < vTars.size(); i++)
         {
 
diff --git a/tools/tars2cpp/tars2cpp.cpp b/tools/tars2cpp/tars2cpp.cpp
index ec9e469..572d1c0 100644
--- a/tools/tars2cpp/tars2cpp.cpp
+++ b/tools/tars2cpp/tars2cpp.cpp
@@ -31,7 +31,7 @@ Tars2Cpp::Tars2Cpp()
 , _onlyStruct(false)
 , _bJsonSupport(true)
 , _namespace("tars")
-, _unknownField(false)
+// , _unknownField(false)
 , _tarsMaster(false)
 {
 
@@ -230,18 +230,18 @@ string Tars2Cpp::readFrom(const TypeIdPtr& pPtr, bool bIsRequire) const
 
 
 
-string Tars2Cpp::readUnknown(const TypeIdPtr& pPtr) const
-{
-    ostringstream s;
-    s << TAB << "_is.readUnknown(sUnknownField, " <<  pPtr->getTag() << ");" << endl;
-    return s.str();
-}
-string Tars2Cpp::writeUnknown() const
-{
-    ostringstream s;
-    s << TAB << "_os.writeUnknown(sUnknownField);" << endl;
-    return s.str();
-}
+// string Tars2Cpp::readUnknown(const TypeIdPtr& pPtr) const
+// {
+//     ostringstream s;
+//     s << TAB << "_is.readUnknown(sUnknownField, " <<  pPtr->getTag() << ");" << endl;
+//     return s.str();
+// }
+// string Tars2Cpp::writeUnknown() const
+// {
+//     ostringstream s;
+//     s << TAB << "_os.writeUnknown(sUnknownField);" << endl;
+//     return s.str();
+// }
 
 string Tars2Cpp::display(const TypeIdPtr& pPtr) const
 {
@@ -568,14 +568,14 @@ string Tars2Cpp::generateH(const StructPtr& pPtr, const string& namespaceId) con
         }
     }
 
-    if (b)
-    {
-    	if (_unknownField)
-    	{
-        	s << ",sUnknownField(\"\")";
-    	}
-        s << endl;
-    }
+    // if (b)
+    // {
+    // 	if (_unknownField)
+    // 	{
+    //     	s << ",sUnknownField(\"\")";
+    // 	}
+    //     s << endl;
+    // }
 
     s << TAB << "{" << endl;
     INC_TAB;
@@ -656,10 +656,10 @@ string Tars2Cpp::generateH(const StructPtr& pPtr, const string& namespaceId) con
     {
         s << writeTo(member[j]);
     }
-	if (_unknownField)
-    {
-		s << writeUnknown();
-	}
+	// if (_unknownField)
+    // {
+	// 	s << writeUnknown();
+	// }
     DEL_TAB;
     s << TAB << "}" << endl;
 
@@ -673,10 +673,10 @@ string Tars2Cpp::generateH(const StructPtr& pPtr, const string& namespaceId) con
     {
         s << readFrom(member[j]);
     }
-    if (_unknownField)
-    {
-        s << readUnknown(member[member.size() - 1]);
-    }
+    // if (_unknownField)
+    // {
+    //     s << readUnknown(member[member.size() - 1]);
+    // }
 
     DEL_TAB;
     s << TAB << "}" << endl;
@@ -771,10 +771,10 @@ string Tars2Cpp::generateH(const StructPtr& pPtr, const string& namespaceId) con
         s << TAB << tostr(member[j]->getTypePtr()) << " " << member[j]->getId() << toStrSuffix(member[j]) << ";" << endl;
 
     }
-    if  (_unknownField)
-    {
-	    s << TAB << "std::string sUnknownField;" << endl;
-    }
+    // if  (_unknownField)
+    // {
+	//     s << TAB << "std::string sUnknownField;" << endl;
+    // }
     DEL_TAB;
     s << TAB << "};" << endl;
 
@@ -1376,6 +1376,7 @@ string Tars2Cpp::generateServantDispatch(const OperationPtr& pPtr, const string&
     return s.str();
 }
 
+/*
 string Tars2Cpp::promiseReadFrom(const TypeIdPtr &pPtr, bool bIsRequire) const
 {
     ostringstream s;
@@ -1442,6 +1443,7 @@ bool Tars2Cpp::isPromiseDispatchInitValue(const TypeIdPtr &pPtr) const
     }
     return false;
 }
+*/
 string Tars2Cpp::generateHAsync(const OperationPtr& pPtr, const string& cn) const
 {
     ostringstream s;
@@ -1502,7 +1504,7 @@ string Tars2Cpp::generateHAsync(const OperationPtr& pPtr, const string& cn) cons
     DEL_TAB;
     s << TAB << "}" << endl;
     s << TAB << endl;
-
+/*
    //promise异步的函数声明
    string sStruct = pPtr->getId();
 
@@ -1559,7 +1561,7 @@ string Tars2Cpp::generateHAsync(const OperationPtr& pPtr, const string& cn) cons
     DEL_TAB;
     s << TAB << "}" << endl;
     s << endl;
-
+*/
     //协程并行异步的函数声明
     s << TAB << "void coro_" << pPtr->getId() << "(";
     s << cn << "CoroPrxCallbackPtr callback,";
@@ -1811,6 +1813,7 @@ struct SortOperation {
     }
 };
 
+/*
 string Tars2Cpp::generateHPromiseAsync(const InterfacePtr &pInter, const OperationPtr &pPtr) const
 {
     ostringstream s;
@@ -1972,6 +1975,7 @@ string Tars2Cpp::generateDispatchPromiseAsync(const OperationPtr &pPtr, const st
 
     return s.str();
 }
+*/
 /******************************InterfacePtr***************************************/
 string Tars2Cpp::generateH(const InterfacePtr &pPtr, const NamespacePtr &nPtr) const
 {
@@ -2077,9 +2081,9 @@ string Tars2Cpp::generateH(const InterfacePtr &pPtr, const NamespacePtr &nPtr) c
 
     s << TAB << "typedef tars::TC_AutoPtr<" << pPtr->getId() << "PrxCallback> " << pPtr->getId() << "PrxCallbackPtr;" << endl;
     s << endl;
-
+/*
 	//生成promise异步回调Proxy
-    s << TAB << "/* callback of promise async proxy for client */" << endl;
+    s << TAB << "//callback of promise async proxy for client" << endl;
     s << TAB << "class " << pPtr->getId() << "PrxCallbackPromise: public tars::ServantProxyCallback" << endl;
     s << TAB << "{" << endl;
     s << TAB << "public:" << endl;
@@ -2156,7 +2160,7 @@ string Tars2Cpp::generateH(const InterfacePtr &pPtr, const NamespacePtr &nPtr) c
 
     s << TAB << "typedef tars::TC_AutoPtr<" << pPtr->getId() << "PrxCallbackPromise> " << pPtr->getId() << "PrxCallbackPromisePtr;" << endl;
     s << endl;
-
+*/
     //生成协程异步回调类，用于并发请求
     s << TAB << "/* callback of coroutine async proxy for client */" << endl;
     s << TAB << "class " << pPtr->getId() << "CoroPrxCallback: public " << pPtr->getId() << "PrxCallback" << endl;
@@ -2542,7 +2546,7 @@ void Tars2Cpp::generateH(const ContextPtr &pPtr) const
         {
             s << "#include \"servant/ServantProxy.h\"" << endl;
             s << "#include \"servant/Servant.h\"" << endl;
-			s << "#include \"promise/promise.h\"" << endl;
+			// s << "#include \"promise/promise.h\"" << endl;
             break;
         }
     }
diff --git a/tools/tars2cpp/tars2cpp.h b/tools/tars2cpp/tars2cpp.h
index b9191f8..bd49380 100644
--- a/tools/tars2cpp/tars2cpp.h
+++ b/tools/tars2cpp/tars2cpp.h
@@ -64,7 +64,7 @@ public:
     /**
      * setUnknownField for UnknownField support
      */
-    void setUnknownField(bool bUnkownField) { _unknownField = bUnkownField; }
+    // void setUnknownField(bool bUnkownField) { _unknownField = bUnkownField; }
 
     /**
      * added for master info
@@ -113,7 +113,7 @@ protected:
      *
      * @return string
      */
-    string promiseReadFrom(const TypeIdPtr &pPtr, bool bIsRequire = true) const;
+    // string promiseReadFrom(const TypeIdPtr &pPtr, bool bIsRequire = true) const;
 
     /**
      *
@@ -121,14 +121,14 @@ protected:
      *
      * @return string
      */
-    string readUnknown(const TypeIdPtr &pPtr) const;
+    // string readUnknown(const TypeIdPtr &pPtr) const;
     /**
      *
      * @param pPtr
      *
      * @return string
      */
-    string writeUnknown()const;
+    // string writeUnknown()const;
     /**
      *
      * @param pPtr
@@ -354,7 +354,7 @@ protected:
      *
      * @return string
      */
-    string generateHPromiseAsync(const InterfacePtr &pInter, const OperationPtr &pPtr) const;
+//    string generateHPromiseAsync(const InterfacePtr &pInter, const OperationPtr &pPtr) const;
 
     /**
      * 生成操作函数调用分发的源码
@@ -363,7 +363,7 @@ protected:
      *
      * @return string
      */
-    string generateDispatchPromiseAsync(const OperationPtr &pPtr, const string &cn) const;
+//    string generateDispatchPromiseAsync(const OperationPtr &pPtr, const string &cn) const;
 
     /**
      * 生成操作的servant的头文件源码
@@ -440,7 +440,7 @@ protected:
 
     string generateInitValue(const TypeIdPtr &pPtr) const;
 
-    bool isPromiseDispatchInitValue(const TypeIdPtr &pPtr) const;
+//    bool isPromiseDispatchInitValue(const TypeIdPtr &pPtr) const;
 
 private:
     std::string _baseDir;
@@ -453,7 +453,7 @@ private:
 
     std::string _namespace ;
 
-    bool _unknownField;
+    // bool _unknownField;
 
     bool _tarsMaster;
 };
diff --git a/util/src/tc_socket.cpp b/util/src/tc_socket.cpp
index a1fbdb8..90319cb 100755
--- a/util/src/tc_socket.cpp
+++ b/util/src/tc_socket.cpp
@@ -788,7 +788,7 @@ clean:
     TAF_THROW_EXCEPTION_SYSCODE(TC_Socket_Exception, "[TC_Socket::createPipe] error");
 }
 
-#if TARGET_PLATFORM_LINUX||TARGET_PLATFORM_IOS
+#if TARGET_PLATFORM_LINUX
 vector<string> TC_Socket::getLocalHosts(int domain)
 {
     vector<string> result;
@@ -858,6 +858,35 @@ vector<string> TC_Socket::getLocalHosts(int domain)
 
     return result;
 }
+#elif TARGET_PLATFORM_IOS
+vector<string> TC_Socket::getLocalHosts(int domain)
+{
+    vector<string> hosts;
+    char local[255] = { 0 };
+    gethostname(local, sizeof(local));
+    hostent* ph = gethostbyname(local);
+    if (ph == NULL)
+    {
+        return hosts;
+    }
+
+    in_addr addr;
+    if (ph->h_addrtype == AF_INET) 
+    {
+        int i = 0;
+        while (ph->h_addr_list[i] != 0) 
+        {
+            addr.s_addr = *(u_long*)ph->h_addr_list[i++];
+            hosts.emplace_back(inet_ntoa(addr));
+        }
+    }
+    else 
+    {
+        // unsupport AF_INET6  ...
+        return hosts;
+    }
+    return hosts;
+}
 #endif
 
 #if TARGET_PLATFORM_WINDOWS