Merge pull request #5712 from alibaba/feature_support_grpc_core

Merge 2.X branch to develop

.travis.yml

@@ -31,9 +31,9 @@ script:
   - mvn clean -Premove-test-data
   - mvn -Prelease-nacos -Dmaven.test.skip=true clean install -U
   - mvn clean -Premove-test-data
-  - mvn clean install -Pcit-test
+  - mvn clean package -Pcit-test
   - mvn clean -Premove-test-data
-  - mvn clean package -Pit-test
+  - mvn clean package -Pnit-test
   - mvn clean -Premove-test-data
 after_success:
   - mvn clean package -Pit-test

NOTICE

@@ -52,3 +52,31 @@ https://github.com/Dynatrace/openkit-java
      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.
+
+------
+This product has a bundle Protocol Buffers<72><73>
+                      Protocol Buffers
+                   =======================
+Protocol Buffers for Go with Gadgets
+
+Copyright (c) 2013, The GoGo Authors. All rights reserved.
+http://github.com/gogo/protobuf
+
+------
+This product has a bundle Istio<69><6F>
+                          Istio
+                   =======================
+
+   Copyright 2018 Istio Authors
+
+   Licensed under the Apache License, Version 2.0 (the "License");
+   you may not use this file except in compliance with the License.
+   You may obtain a copy of the License at
+
+       http://www.apache.org/licenses/LICENSE-2.0
+
+   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.

address/pom.xml

@@ -46,16 +46,6 @@
                 </exclusion>
             </exclusions>
         </dependency>
-        <dependency>
-            <groupId>org.mockito</groupId>
-            <artifactId>mockito-all</artifactId>
-            <scope>test</scope>
-        </dependency>
-        <dependency>
-            <groupId>org.hamcrest</groupId>
-            <artifactId>hamcrest-all</artifactId>
-            <scope>test</scope>
-        </dependency>
     </dependencies>
     
     <build>

address/src/main/java/com/alibaba/nacos/address/auth/AddressServerAuthManager.java

@@ -37,6 +37,11 @@ public class AddressServerAuthManager implements AuthManager {
         return result;
     }
     
+    @Override
+    public User loginRemote(Object request) throws AccessException {
+        return null;
+    }
+    
     @Override
     public void auth(Permission permission, User user) throws AccessException {
     }

api/pom.xml

@@ -31,12 +31,32 @@
     <url>http://nacos.io</url>
     <build>
         <plugins>
+            <!--  reuse when you need to update grpc model  -->
+             <!--<plugin>
+                 <groupId>org.xolstice.maven.plugins</groupId>
+                 <artifactId>protobuf-maven-plugin</artifactId>
+                 <version>0.5.0</version>
+                 <configuration>
+                     <protocArtifact>com.google.protobuf:protoc:3.8.0:exe:${os.detected.classifier}</protocArtifact>
+                     <pluginId>grpc-java</pluginId>
+                     <pluginArtifact>io.grpc:protoc-gen-grpc-java:1.14.0:exe:${os.detected.classifier}</pluginArtifact>
+                 </configuration>
+                 <executions>
+                     <execution>
+                         <goals>
+                             <goal>compile</goal>
+                             <goal>compile-custom</goal>
+                         </goals>
+                     </execution>
+                 </executions>
+             </plugin>-->
+            
             <plugin>
                 <groupId>org.apache.maven.plugins</groupId>
                 <artifactId>maven-compiler-plugin</artifactId>
                 <configuration>
-                    <source>6</source>
-                    <target>6</target>
+                    <source>8</source>
+                    <target>8</target>
                 </configuration>
             </plugin>
         </plugins>
@@ -55,6 +75,15 @@
             <groupId>com.fasterxml.jackson.core</groupId>
             <artifactId>jackson-databind</artifactId>
         </dependency>
+        <dependency>
+            <groupId>org.reflections</groupId>
+            <artifactId>reflections</artifactId>
+        </dependency>
+        <dependency>
+            <groupId>junit</groupId>
+            <artifactId>junit</artifactId>
+            <scope>test</scope>
+        </dependency>
         <dependency>
             <groupId>org.springframework</groupId>
             <artifactId>spring-test</artifactId>
@@ -64,5 +93,40 @@
             <groupId>com.google.guava</groupId>
             <artifactId>guava</artifactId>
         </dependency>
+        
+        <dependency>
+            <groupId>io.grpc</groupId>
+            <artifactId>grpc-netty-shaded</artifactId>
+        </dependency>
+        <dependency>
+            <groupId>io.grpc</groupId>
+            <artifactId>grpc-protobuf</artifactId>
+        </dependency>
+        <dependency>
+            <groupId>io.grpc</groupId>
+            <artifactId>grpc-stub</artifactId>
+        </dependency>
+        <dependency>
+            <groupId>io.netty</groupId>
+            <artifactId>netty-all</artifactId>
+        </dependency>
+        <dependency>
+            <groupId>com.google.api.grpc</groupId>
+            <artifactId>proto-google-common-protos</artifactId>
+        </dependency>
+        <dependency>
+            <groupId>com.google.protobuf</groupId>
+            <artifactId>protobuf-java</artifactId>
+        </dependency>
+        <dependency>
+            <groupId>io.grpc</groupId>
+            <artifactId>protoc-gen-grpc-java</artifactId>
+            <type>pom</type>
+        </dependency>
+        <dependency>
+            <groupId>javax.annotation</groupId>
+            <artifactId>javax.annotation-api</artifactId>
+        </dependency>
+    
     </dependencies>
 </project>

api/src/main/java/com/alibaba/nacos/api/ability/ClientAbilities.java

@@ -0,0 +1,59 @@
+/*
+ * Copyright 1999-2018 Alibaba Group Holding Ltd.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * 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.
+ */
+
+package com.alibaba.nacos.api.ability;
+
+import com.alibaba.nacos.api.config.ClientConfigAbility;
+import com.alibaba.nacos.api.naming.ClientNamingAbility;
+
+/**
+ * abilities of nacos client.
+ *
+ * @author liuzunfei
+ * @version $Id: ClientAbilities.java, v 0.1 2021年01月24日 00:09 AM liuzunfei Exp $
+ */
+public class ClientAbilities {
+    
+    private ClientRemoteAbility remoteAbility = new ClientRemoteAbility();
+    
+    private ClientConfigAbility configAbility = new ClientConfigAbility();
+    
+    private ClientNamingAbility namingAbility = new ClientNamingAbility();
+    
+    public ClientRemoteAbility getRemoteAbility() {
+        return remoteAbility;
+    }
+    
+    public void setRemoteAbility(ClientRemoteAbility remoteAbility) {
+        this.remoteAbility = remoteAbility;
+    }
+    
+    public ClientConfigAbility getConfigAbility() {
+        return configAbility;
+    }
+    
+    public void setConfigAbility(ClientConfigAbility configAbility) {
+        this.configAbility = configAbility;
+    }
+    
+    public ClientNamingAbility getNamingAbility() {
+        return namingAbility;
+    }
+    
+    public void setNamingAbility(ClientNamingAbility namingAbility) {
+        this.namingAbility = namingAbility;
+    }
+}

api/src/main/java/com/alibaba/nacos/api/ability/ClientRemoteAbility.java

@@ -13,37 +13,27 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
-package com.alibaba.nacos.test;
 
-import junit.framework.Test;
-import junit.framework.TestCase;
-import junit.framework.TestSuite;
+package com.alibaba.nacos.api.ability;
 
 /**
- * Unit test for simple App.
- */
-public class AppTest
-    extends TestCase {
-    /**
-     * Create the test case
+ * remote abilities of nacos client.
  *
-     * @param testName name of the test case
+ * @author liuzunfei
+ * @version $Id: ClientRemoteAbility.java, v 0.1 2021年01月24日 00:09 AM liuzunfei Exp $
  */
-    public AppTest(String testName) {
-        super(testName);
-    }
+public class ClientRemoteAbility {
     
     /**
-     * @return the suite of tests being tested
+     * if support remote connection.
      */
-    public static Test suite() {
-        return new TestSuite(AppTest.class);
+    private boolean supportRemoteConnection;
+    
+    public boolean isSupportRemoteConnection() {
+        return this.supportRemoteConnection;
     }
     
-    /**
-     * Rigourous Test :-)
-     */
-    public void testApp() {
-        assertTrue(true);
+    public void setSupportRemoteConnection(boolean supportRemoteConnection) {
+        this.supportRemoteConnection = supportRemoteConnection;
     }
 }

api/src/main/java/com/alibaba/nacos/api/ability/ServerAbilities.java

@@ -0,0 +1,80 @@
+/*
+ * Copyright 1999-2018 Alibaba Group Holding Ltd.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * 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.
+ */
+
+package com.alibaba.nacos.api.ability;
+
+import com.alibaba.nacos.api.config.ServerConfigAbility;
+import com.alibaba.nacos.api.naming.ServerNamingAbility;
+
+import java.io.Serializable;
+import java.util.Objects;
+
+/**
+ * abilities of nacos server.
+ *
+ * @author liuzunfei
+ * @version $Id: ServerAbilities.java, v 0.1 2021年01月24日 00:09 AM liuzunfei Exp $
+ */
+public class ServerAbilities implements Serializable {
+    
+    private ServerRemoteAbility remoteAbility = new ServerRemoteAbility();
+    
+    private ServerConfigAbility configAbility = new ServerConfigAbility();
+    
+    private ServerNamingAbility namingAbility = new ServerNamingAbility();
+    
+    public ServerRemoteAbility getRemoteAbility() {
+        return remoteAbility;
+    }
+    
+    public void setRemoteAbility(ServerRemoteAbility remoteAbility) {
+        this.remoteAbility = remoteAbility;
+    }
+    
+    public ServerConfigAbility getConfigAbility() {
+        return configAbility;
+    }
+    
+    public void setConfigAbility(ServerConfigAbility configAbility) {
+        this.configAbility = configAbility;
+    }
+    
+    public ServerNamingAbility getNamingAbility() {
+        return namingAbility;
+    }
+    
+    public void setNamingAbility(ServerNamingAbility namingAbility) {
+        this.namingAbility = namingAbility;
+    }
+    
+    @Override
+    public boolean equals(Object o) {
+        if (this == o) {
+            return true;
+        }
+        if (o == null || getClass() != o.getClass()) {
+            return false;
+        }
+        ServerAbilities that = (ServerAbilities) o;
+        return Objects.equals(remoteAbility, that.remoteAbility) && Objects.equals(configAbility, that.configAbility)
+                && Objects.equals(namingAbility, that.namingAbility);
+    }
+    
+    @Override
+    public int hashCode() {
+        return Objects.hash(remoteAbility, configAbility, namingAbility);
+    }
+}

api/src/main/java/com/alibaba/nacos/api/ability/ServerRemoteAbility.java

@@ -0,0 +1,59 @@
+/*
+ * Copyright 1999-2018 Alibaba Group Holding Ltd.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * 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.
+ */
+
+package com.alibaba.nacos.api.ability;
+
+import java.io.Serializable;
+import java.util.Objects;
+
+/**
+ * remote abilities of nacos server.
+ *
+ * @author liuzunfei
+ * @version $Id: ServerRemoteAbility.java, v 0.1 2021年01月24日 00:09 AM liuzunfei Exp $
+ */
+public class ServerRemoteAbility implements Serializable {
+    
+    /**
+     * if support remote connection.
+     */
+    private boolean supportRemoteConnection;
+    
+    public boolean isSupportRemoteConnection() {
+        return this.supportRemoteConnection;
+    }
+    
+    public void setSupportRemoteConnection(boolean supportRemoteConnection) {
+        this.supportRemoteConnection = supportRemoteConnection;
+    }
+    
+    @Override
+    public boolean equals(Object o) {
+        if (this == o) {
+            return true;
+        }
+        if (o == null || getClass() != o.getClass()) {
+            return false;
+        }
+        ServerRemoteAbility that = (ServerRemoteAbility) o;
+        return supportRemoteConnection == that.supportRemoteConnection;
+    }
+    
+    @Override
+    public int hashCode() {
+        return Objects.hash(supportRemoteConnection);
+    }
+}

api/src/main/java/com/alibaba/nacos/api/cmdb/spi/CmdbService.java

@@ -93,7 +93,7 @@ public interface CmdbService {
      *
      * @param entityName name of entity
      * @param entityType type of entity
-     * @return
+     * @return entity.
      */
     Entity getEntity(String entityName, String entityType);
 }

api/src/main/java/com/alibaba/nacos/api/common/Constants.java

@@ -196,4 +196,17 @@ public class Constants {
     
     public static final String ALL_PATTERN = "*";
     
+    public static final String COLON = ":";
+    
+    public static final String LINE_BREAK = "\n";
+    
+    public static final String POUND = "#";
+    
+    public static final String VIPSERVER_TAG = "Vipserver-Tag";
+    
+    public static final String AMORY_TAG = "Amory-Tag";
+    
+    public static final String LOCATION_TAG = "Location-Tag";
+    
+    public static final String CHARSET_KEY = "charset";
 }

api/src/main/java/com/alibaba/nacos/api/config/ClientConfigAbility.java

@@ -0,0 +1,39 @@
+/*
+ * Copyright 1999-2018 Alibaba Group Holding Ltd.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * 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.
+ */
+
+package com.alibaba.nacos.api.config;
+
+/**
+ * config abilities of nacos client.
+ *
+ * @author liuzunfei
+ * @version $Id: ClientConfigAbility.java, v 0.1 2021年01月24日 00:09 AM liuzunfei Exp $
+ */
+public class ClientConfigAbility {
+    
+    /**
+     * support remote metrics get.
+     */
+    private boolean supportRemoteMetrics;
+    
+    public boolean isSupportRemoteMetrics() {
+        return supportRemoteMetrics;
+    }
+    
+    public void setSupportRemoteMetrics(boolean supportRemoteMetrics) {
+        this.supportRemoteMetrics = supportRemoteMetrics;
+    }
+}

api/src/main/java/com/alibaba/nacos/api/config/ConfigService.java

@@ -79,6 +79,7 @@ public interface ConfigService {
      */
     boolean publishConfig(String dataId, String group, String content) throws NacosException;
     
+    
     /**
      * Publish config.
      *
@@ -91,6 +92,32 @@ public interface ConfigService {
      */
     boolean publishConfig(String dataId, String group, String content, String type) throws NacosException;
     
+    /**
+     * Cas Publish config.
+     *
+     * @param dataId  dataId
+     * @param group   group
+     * @param content content
+     * @param casMd5  casMd5 prev content's md5 to cas.
+     * @return Whether publish
+     * @throws NacosException NacosException
+     */
+    boolean publishConfigCas(String dataId, String group, String content, String casMd5) throws NacosException;
+    
+    /**
+     * Cas Publish config.
+     *
+     * @param dataId  dataId
+     * @param group   group
+     * @param content content
+     * @param casMd5  casMd5 prev content's md5 to cas.
+     * @param type    config type {@link ConfigType}
+     * @return Whether publish
+     * @throws NacosException NacosException
+     */
+    boolean publishConfigCas(String dataId, String group, String content, String casMd5, String type)
+            throws NacosException;
+    
     /**
      * Remove config.
      *

api/src/main/java/com/alibaba/nacos/api/config/ServerConfigAbility.java

@@ -0,0 +1,59 @@
+/*
+ * Copyright 1999-2018 Alibaba Group Holding Ltd.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * 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.
+ */
+
+package com.alibaba.nacos.api.config;
+
+import java.io.Serializable;
+import java.util.Objects;
+
+/**
+ * config abilities of nacos server.
+ *
+ * @author liuzunfei
+ * @version $Id: ServerConfigAbility.java, v 0.1 2021年01月24日 00:09 AM liuzunfei Exp $
+ */
+public class ServerConfigAbility implements Serializable {
+    
+    /**
+     * support remote metrics get.
+     */
+    private boolean supportRemoteMetrics;
+    
+    public boolean isSupportRemoteMetrics() {
+        return supportRemoteMetrics;
+    }
+    
+    public void setSupportRemoteMetrics(boolean supportRemoteMetrics) {
+        this.supportRemoteMetrics = supportRemoteMetrics;
+    }
+    
+    @Override
+    public boolean equals(Object o) {
+        if (this == o) {
+            return true;
+        }
+        if (o == null || getClass() != o.getClass()) {
+            return false;
+        }
+        ServerConfigAbility that = (ServerConfigAbility) o;
+        return supportRemoteMetrics == that.supportRemoteMetrics;
+    }
+    
+    @Override
+    public int hashCode() {
+        return Objects.hash(supportRemoteMetrics);
+    }
+}

api/src/main/java/com/alibaba/nacos/api/config/remote/request/AbstractConfigRequest.java

@@ -0,0 +1,32 @@
+/*
+ * Copyright 1999-2018 Alibaba Group Holding Ltd.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * 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.
+ */
+
+package com.alibaba.nacos.api.config.remote.request;
+
+import com.alibaba.nacos.api.remote.request.Request;
+
+/**
+ * abstract request of config module request,all config module request should extends this class.
+ * @author liuzunfei
+ * @version $Id: ConfigCommonRequest.java, v 0.1 2020年07月13日 9:05 PM liuzunfei Exp $
+ */
+public abstract class AbstractConfigRequest extends Request {
+
+    @Override
+    public String getModule() {
+        return "config";
+    }
+}

api/src/main/java/com/alibaba/nacos/api/config/remote/request/ClientConfigMetricRequest.java

@@ -0,0 +1,112 @@
+/*
+ * Copyright 1999-2020 Alibaba Group Holding Ltd.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * 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.
+ */
+
+package com.alibaba.nacos.api.config.remote.request;
+
+import com.alibaba.nacos.api.remote.request.ServerRequest;
+
+import java.io.Serializable;
+import java.util.ArrayList;
+import java.util.List;
+import java.util.Objects;
+
+/**
+ * request of config module metrics.
+ *
+ * @author liuzunfei
+ * @version $Id: ClientConfigMetricRequest.java, v 0.1 2020年12月30日 9:05 PM liuzunfei Exp $
+ */
+public class ClientConfigMetricRequest extends ServerRequest {
+    
+    private List<MetricsKey> metricsKeys = new ArrayList<MetricsKey>();
+    
+    @Override
+    public String getModule() {
+        return "config";
+    }
+    
+    public List<MetricsKey> getMetricsKeys() {
+        return metricsKeys;
+    }
+    
+    public void setMetricsKeys(List<MetricsKey> metricsKeys) {
+        this.metricsKeys = metricsKeys;
+    }
+    
+    public static class MetricsKey implements Serializable {
+        
+        String type;
+        
+        String key;
+        
+        public static final String CACHE_DATA = "cacheData";
+        
+        public static final String SNAPSHOT_DATA = "snapshotData";
+        
+        /**
+         * build metrics key.
+         *
+         * @param type type.
+         * @param key  key.
+         * @return metric key.
+         */
+        public static MetricsKey build(String type, String key) {
+            MetricsKey metricsKey = new MetricsKey();
+            metricsKey.type = type;
+            metricsKey.key = key;
+            return metricsKey;
+        }
+        
+        public String getType() {
+            return type;
+        }
+        
+        public void setType(String type) {
+            this.type = type;
+        }
+        
+        public String getKey() {
+            return key;
+        }
+        
+        public void setKey(String key) {
+            this.key = key;
+        }
+        
+        @Override
+        public String toString() {
+            return "MetricsKey{" + "type='" + type + '\'' + ", key='" + key + '\'' + '}';
+        }
+        
+        @Override
+        public boolean equals(Object o) {
+            if (this == o) {
+                return true;
+            }
+            if (o == null || getClass() != o.getClass()) {
+                return false;
+            }
+            MetricsKey that = (MetricsKey) o;
+            return Objects.equals(type, that.type) && Objects.equals(key, that.key);
+        }
+        
+        @Override
+        public int hashCode() {
+            return Objects.hash(type, key);
+        }
+    }
+    
+}

api/src/main/java/com/alibaba/nacos/api/config/remote/request/ConfigBatchListenRequest.java

@@ -0,0 +1,182 @@
+/*
+ * Copyright 1999-2020 Alibaba Group Holding Ltd.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * 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.
+ */
+
+package com.alibaba.nacos.api.config.remote.request;
+
+import java.util.ArrayList;
+import java.util.List;
+
+/**
+ * request of listening a batch of configs.
+ *
+ * @author liuzunfei
+ * @version $Id: ConfigBatchListenRequest.java, v 0.1 2020年07月27日 7:46 PM liuzunfei Exp $
+ */
+public class ConfigBatchListenRequest extends AbstractConfigRequest {
+    
+    /**
+     * listen or remove listen.
+     */
+    private boolean listen = true;
+    
+    private List<ConfigListenContext> configListenContexts = new ArrayList<ConfigListenContext>();
+    
+    /**
+     * add listen config.
+     *
+     * @param group  group.
+     * @param dataId dataId.
+     * @param tenant tenant.
+     * @param md5    md5.
+     */
+    public void addConfigListenContext(String group, String dataId, String tenant, String md5) {
+        ConfigListenContext configListenContext = new ConfigListenContext();
+        configListenContext.dataId = dataId;
+        configListenContext.group = group;
+        configListenContext.md5 = md5;
+        configListenContext.tenant = tenant;
+        configListenContexts.add(configListenContext);
+    }
+    
+    /**
+     * Getter method for property <tt>configListenContexts</tt>.
+     *
+     * @return property value of configListenContexts
+     */
+    public List<ConfigListenContext> getConfigListenContexts() {
+        return configListenContexts;
+    }
+    
+    /**
+     * Setter method for property <tt>configListenContexts</tt>.
+     *
+     * @param configListenContexts value to be assigned to property configListenContexts
+     */
+    public void setConfigListenContexts(List<ConfigListenContext> configListenContexts) {
+        this.configListenContexts = configListenContexts;
+    }
+    
+    /**
+     * Getter method for property <tt>listen</tt>.
+     *
+     * @return property value of listen
+     */
+    public boolean isListen() {
+        return listen;
+    }
+    
+    /**
+     * Setter method for property <tt>listen</tt>.
+     *
+     * @param listen value to be assigned to property listen
+     */
+    public void setListen(boolean listen) {
+        this.listen = listen;
+    }
+    
+    public static class ConfigListenContext {
+        
+        String group;
+        
+        String md5;
+        
+        String dataId;
+        
+        String tenant;
+        
+        public ConfigListenContext() {
+        
+        }
+        
+        @Override
+        public String toString() {
+            return "ConfigListenContext{" + "group='" + group + '\'' + ", md5='" + md5 + '\'' + ", dataId='" + dataId
+                    + '\'' + ", tenant='" + tenant + '\'' + '}';
+        }
+        
+        /**
+         * Getter method for property <tt>group</tt>.
+         *
+         * @return property value of group
+         */
+        public String getGroup() {
+            return group;
+        }
+        
+        /**
+         * Setter method for property <tt>groupId</tt>.
+         *
+         * @param group value to be assigned to property groupId
+         */
+        public void setGroup(String group) {
+            this.group = group;
+        }
+        
+        /**
+         * Getter method for property <tt>md5</tt>.
+         *
+         * @return property value of md5
+         */
+        public String getMd5() {
+            return md5;
+        }
+        
+        /**
+         * Setter method for property <tt>md5</tt>.
+         *
+         * @param md5 value to be assigned to property md5
+         */
+        public void setMd5(String md5) {
+            this.md5 = md5;
+        }
+        
+        /**
+         * Getter method for property <tt>dataId</tt>.
+         *
+         * @return property value of dataId
+         */
+        public String getDataId() {
+            return dataId;
+        }
+        
+        /**
+         * Setter method for property <tt>dataId</tt>.
+         *
+         * @param dataId value to be assigned to property dataId
+         */
+        public void setDataId(String dataId) {
+            this.dataId = dataId;
+        }
+        
+        /**
+         * Getter method for property <tt>tenant</tt>.
+         *
+         * @return property value of tenant
+         */
+        public String getTenant() {
+            return tenant;
+        }
+        
+        /**
+         * Setter method for property <tt>tenant</tt>.
+         *
+         * @param tenant value to be assigned to property tenant
+         */
+        public void setTenant(String tenant) {
+            this.tenant = tenant;
+        }
+    }
+}

api/src/main/java/com/alibaba/nacos/api/config/remote/request/ConfigChangeNotifyRequest.java

@@ -0,0 +1,79 @@
+/*
+ * Copyright 1999-2020 Alibaba Group Holding Ltd.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * 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.
+ */
+
+package com.alibaba.nacos.api.config.remote.request;
+
+import com.alibaba.nacos.api.remote.request.ServerRequest;
+
+/**
+ * ConfigChangeNotifyRequest.
+ *
+ * @author liuzunfei
+ * @version $Id: ConfigChangeNotifyRequest.java, v 0.1 2020年07月14日 3:20 PM liuzunfei Exp $
+ */
+public class ConfigChangeNotifyRequest extends ServerRequest {
+    
+    String dataId;
+    
+    String group;
+    
+    String tenant;
+    
+    public String getDataId() {
+        return dataId;
+    }
+    
+    public void setDataId(String dataId) {
+        this.dataId = dataId;
+    }
+    
+    public String getGroup() {
+        return group;
+    }
+    
+    public void setGroup(String group) {
+        this.group = group;
+    }
+    
+    public String getTenant() {
+        return tenant;
+    }
+    
+    public void setTenant(String tenant) {
+        this.tenant = tenant;
+    }
+    
+    /**
+     * build success response.
+     *
+     * @param dataId dataId
+     * @param group  group
+     * @param tenant tenant
+     * @return ConfigChangeNotifyResponse
+     */
+    public static ConfigChangeNotifyRequest build(String dataId, String group, String tenant) {
+        ConfigChangeNotifyRequest request = new ConfigChangeNotifyRequest();
+        request.setDataId(dataId);
+        request.setGroup(group);
+        request.setTenant(tenant);
+        return request;
+    }
+    
+    @Override
+    public String getModule() {
+        return "config";
+    }
+}

api/src/main/java/com/alibaba/nacos/api/config/remote/request/ConfigPublishRequest.java

@@ -0,0 +1,183 @@
+/*
+ * Copyright 1999-2020 Alibaba Group Holding Ltd.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * 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.
+ */
+
+package com.alibaba.nacos.api.config.remote.request;
+
+import java.util.HashMap;
+import java.util.Map;
+
+/**
+ * request to publish a config.
+ *
+ * @author liuzunfei
+ * @version $Id: ConfigPublishRequest.java, v 0.1 2020年07月16日 4:30 PM liuzunfei Exp $
+ */
+public class ConfigPublishRequest extends AbstractConfigRequest {
+    
+    String dataId;
+    
+    String group;
+    
+    String tenant;
+    
+    String content;
+    
+    String casMd5;
+    
+    private Map<String, String> additionMap;
+    
+    public ConfigPublishRequest() {
+    
+    }
+    
+    /**
+     * get additional param.
+     *
+     * @param key key of param.
+     * @return value of param ,return null if not exist.
+     */
+    public String getAdditionParam(String key) {
+        return additionMap == null ? null : additionMap.get(key);
+    }
+    
+    /**
+     * put additional param value. will override if exist.
+     *
+     * @param key   key of param.
+     * @param value value of param.
+     */
+    public void putAdditionalParam(String key, String value) {
+        if (additionMap == null) {
+            additionMap = new HashMap<String, String>(2);
+        }
+        additionMap.put(key, value);
+    }
+    
+    public ConfigPublishRequest(String dataId, String group, String tenant, String content) {
+        this.content = content;
+        this.dataId = dataId;
+        this.group = group;
+        this.tenant = tenant;
+    }
+    
+    /**
+     * Getter method for property <tt>dataId</tt>.
+     *
+     * @return property value of dataId
+     */
+    public String getDataId() {
+        return dataId;
+    }
+    
+    /**
+     * Setter method for property <tt>dataId</tt>.
+     *
+     * @param dataId value to be assigned to property dataId
+     */
+    public void setDataId(String dataId) {
+        this.dataId = dataId;
+    }
+    
+    /**
+     * Getter method for property <tt>group</tt>.
+     *
+     * @return property value of group
+     */
+    public String getGroup() {
+        return group;
+    }
+    
+    /**
+     * Setter method for property <tt>group</tt>.
+     *
+     * @param group value to be assigned to property group
+     */
+    public void setGroup(String group) {
+        this.group = group;
+    }
+    
+    /**
+     * Getter method for property <tt>content</tt>.
+     *
+     * @return property value of content
+     */
+    public String getContent() {
+        return content;
+    }
+    
+    /**
+     * Setter method for property <tt>content</tt>.
+     *
+     * @param content value to be assigned to property content
+     */
+    public void setContent(String content) {
+        this.content = content;
+    }
+    
+    /**
+     * Getter method for property <tt>casMd5</tt>.
+     *
+     * @return property value of casMd5
+     */
+    public String getCasMd5() {
+        return casMd5;
+    }
+    
+    /**
+     * Setter method for property <tt>casMd5</tt>.
+     *
+     * @param casMd5 value to be assigned to property content
+     */
+    public void setCasMd5(String casMd5) {
+        this.casMd5 = casMd5;
+    }
+    
+    /**
+     * Getter method for property <tt>casMd5</tt>.
+     *
+     * @return property value of casMd5
+     */
+    public Map<String, String> getAdditionMap() {
+        return additionMap;
+    }
+    
+    /**
+     * Setter method for property <tt>additionMap</tt>.
+     *
+     * @param additionMap value to be assigned to property additionMap
+     */
+    public void setAdditionMap(Map<String, String> additionMap) {
+        this.additionMap = additionMap;
+    }
+    
+    /**
+     * Getter method for property <tt>tenant</tt>.
+     *
+     * @return property value of tenant
+     */
+    public String getTenant() {
+        return tenant;
+    }
+    
+    /**
+     * Setter method for property <tt>tenant</tt>.
+     *
+     * @param tenant value to be assigned to property tenant
+     */
+    public void setTenant(String tenant) {
+        this.tenant = tenant;
+    }
+}

api/src/main/java/com/alibaba/nacos/api/config/remote/request/ConfigQueryRequest.java

@@ -0,0 +1,127 @@
+/*
+ * Copyright 1999-2018 Alibaba Group Holding Ltd.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * 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.
+ */
+
+package com.alibaba.nacos.api.config.remote.request;
+
+/**
+ * request to query config content.
+ *
+ * @author liuzunfei
+ * @version $Id: ConfigQueryRequest.java, v 0.1 2020年07月13日 9:06 PM liuzunfei Exp $
+ */
+public class ConfigQueryRequest extends AbstractConfigRequest {
+    
+    private String dataId;
+    
+    private String group;
+    
+    private String tenant;
+    
+    private String tag;
+    
+    /**
+     * request builder.
+     *
+     * @param dataId dataId
+     * @param group  group
+     * @param tenant tenant
+     * @return ConfigQueryRequest instance.
+     */
+    public static ConfigQueryRequest build(String dataId, String group, String tenant) {
+        ConfigQueryRequest request = new ConfigQueryRequest();
+        request.setDataId(dataId);
+        request.setGroup(group);
+        request.setTenant(tenant);
+        return request;
+    }
+    
+    /**
+     * Getter method for property <tt>dataId</tt>.
+     *
+     * @return property value of dataId
+     */
+    public String getDataId() {
+        return dataId;
+    }
+    
+    /**
+     * Setter method for property <tt>dataId</tt>.
+     *
+     * @param dataId value to be assigned to property dataId
+     */
+    public void setDataId(String dataId) {
+        this.dataId = dataId;
+    }
+    
+    /**
+     * Getter method for property <tt>group</tt>.
+     *
+     * @return property value of group
+     */
+    public String getGroup() {
+        return group;
+    }
+    
+    /**
+     * Setter method for property <tt>group</tt>.
+     *
+     * @param group value to be assigned to property group
+     */
+    public void setGroup(String group) {
+        this.group = group;
+    }
+    
+    /**
+     * Getter method for property <tt>tenant</tt>.
+     *
+     * @return property value of tenant
+     */
+    public String getTenant() {
+        return tenant;
+    }
+    
+    /**
+     * Setter method for property <tt>tenant</tt>.
+     *
+     * @param tenant value to be assigned to property tenant
+     */
+    public void setTenant(String tenant) {
+        this.tenant = tenant;
+    }
+    
+    /**
+     * Getter method for property <tt>tag</tt>.
+     *
+     * @return property value of tag
+     */
+    public String getTag() {
+        return tag;
+    }
+    
+    /**
+     * Setter method for property <tt>tag</tt>.
+     *
+     * @param tag value to be assigned to property tag
+     */
+    public void setTag(String tag) {
+        this.tag = tag;
+    }
+    
+    public boolean isNotify() {
+        String notify = getHeader("notify", "false");
+        return Boolean.valueOf(notify);
+    }
+}

api/src/main/java/com/alibaba/nacos/api/config/remote/request/ConfigRemoveRequest.java

@@ -0,0 +1,117 @@
+/*
+ * Copyright 1999-2020 Alibaba Group Holding Ltd.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * 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.
+ */
+
+package com.alibaba.nacos.api.config.remote.request;
+
+/**
+ * request to remove a config .
+ *
+ * @author liuzunfei
+ * @version $Id: ConfigRemoveRequest.java, v 0.1 2020年07月16日 4:31 PM liuzunfei Exp $
+ */
+public class ConfigRemoveRequest extends AbstractConfigRequest {
+    
+    String dataId;
+    
+    String group;
+    
+    String tenant;
+    
+    String tag;
+    
+    public ConfigRemoveRequest() {
+    
+    }
+    
+    public ConfigRemoveRequest(String dataId, String group, String tenant, String tag) {
+        this.dataId = dataId;
+        this.group = group;
+        this.tag = tag;
+        this.tenant = tenant;
+    }
+    
+    /**
+     * Getter method for property <tt>dataId</tt>.
+     *
+     * @return property value of dataId
+     */
+    public String getDataId() {
+        return dataId;
+    }
+    
+    /**
+     * Getter method for property <tt>tag</tt>.
+     *
+     * @return property value of tag
+     */
+    public String getTag() {
+        return tag;
+    }
+    
+    /**
+     * Setter method for property <tt>tag</tt>.
+     *
+     * @param tag value to be assigned to property tag
+     */
+    public void setTag(String tag) {
+        this.tag = tag;
+    }
+    
+    /**
+     * Setter method for property <tt>dataId</tt>.
+     *
+     * @param dataId value to be assigned to property dataId
+     */
+    public void setDataId(String dataId) {
+        this.dataId = dataId;
+    }
+    
+    /**
+     * Getter method for property <tt>group</tt>.
+     *
+     * @return property value of group
+     */
+    public String getGroup() {
+        return group;
+    }
+    
+    /**
+     * Setter method for property <tt>group</tt>.
+     *
+     * @param group value to be assigned to property group
+     */
+    public void setGroup(String group) {
+        this.group = group;
+    }
+    
+    /**
+     * Getter method for property <tt>tenant</tt>.
+     *
+     * @return property value of tenant
+     */
+    public String getTenant() {
+        return tenant;
+    }
+    
+    /**
+     * Setter method for property <tt>tenant</tt>.
+     *
+     * @param tenant value to be assigned to property tenant
+     */
+    public void setTenant(String tenant) {
+        this.tenant = tenant;
+    }
+}

api/src/main/java/com/alibaba/nacos/api/config/remote/request/cluster/ConfigChangeClusterSyncRequest.java

@@ -0,0 +1,139 @@
+/*
+ * Copyright 1999-2020 Alibaba Group Holding Ltd.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * 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.
+ */
+
+package com.alibaba.nacos.api.config.remote.request.cluster;
+
+import com.alibaba.nacos.api.config.remote.request.AbstractConfigRequest;
+
+/**
+ * config change sync request on clusters.
+ *
+ * @author liuzunfei
+ * @version $Id: ConfigChangeClusterSyncRequest.java, v 0.1 2020年08月11日 4:30 PM liuzunfei Exp $
+ */
+public class ConfigChangeClusterSyncRequest extends AbstractConfigRequest {
+    
+    String dataId;
+    
+    String group;
+    
+    String tenant;
+    
+    String tag;
+    
+    long lastModified;
+    
+    boolean isBeta;
+    
+    public boolean isBeta() {
+        return isBeta;
+    }
+    
+    public void setBeta(boolean beta) {
+        isBeta = beta;
+    }
+    
+    /**
+     * Getter method for property <tt>dataId</tt>.
+     *
+     * @return property value of dataId
+     */
+    public String getDataId() {
+        return dataId;
+    }
+    
+    /**
+     * Setter method for property <tt>dataId</tt>.
+     *
+     * @param dataId value to be assigned to property dataId
+     */
+    public void setDataId(String dataId) {
+        this.dataId = dataId;
+    }
+    
+    /**
+     * Getter method for property <tt>group</tt>.
+     *
+     * @return property value of group
+     */
+    public String getGroup() {
+        return group;
+    }
+    
+    /**
+     * Setter method for property <tt>group</tt>.
+     *
+     * @param group value to be assigned to property group
+     */
+    public void setGroup(String group) {
+        this.group = group;
+    }
+    
+    /**
+     * Getter method for property <tt>tenant</tt>.
+     *
+     * @return property value of tenant
+     */
+    public String getTenant() {
+        return tenant;
+    }
+    
+    /**
+     * Setter method for property <tt>tenant</tt>.
+     *
+     * @param tenant value to be assigned to property tenant
+     */
+    public void setTenant(String tenant) {
+        this.tenant = tenant;
+    }
+    
+    /**
+     * Getter method for property <tt>tag</tt>.
+     *
+     * @return property value of tag
+     */
+    public String getTag() {
+        return tag;
+    }
+    
+    /**
+     * Setter method for property <tt>tag</tt>.
+     *
+     * @param tag value to be assigned to property tag
+     */
+    public void setTag(String tag) {
+        this.tag = tag;
+    }
+    
+    /**
+     * Getter method for property <tt>lastModified</tt>.
+     *
+     * @return property value of lastModified
+     */
+    public long getLastModified() {
+        return lastModified;
+    }
+    
+    /**
+     * Setter method for property <tt>lastModified</tt>.
+     *
+     * @param lastModified value to be assigned to property lastModified
+     */
+    public void setLastModified(long lastModified) {
+        this.lastModified = lastModified;
+    }
+    
+}

api/src/main/java/com/alibaba/nacos/api/config/remote/response/ClientConfigMetricResponse.java

@@ -0,0 +1,46 @@
+/*
+ * Copyright 1999-2020 Alibaba Group Holding Ltd.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * 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.
+ */
+
+package com.alibaba.nacos.api.config.remote.response;
+
+import com.alibaba.nacos.api.remote.response.Response;
+
+import java.util.HashMap;
+import java.util.Map;
+
+/**
+ * client config metrics response.
+ *
+ * @author liuzunfei
+ * @version $Id: ClientConfigMetricResponse.java, v 0.1 2020年12月30日 2:59 PM liuzunfei Exp $
+ */
+public class ClientConfigMetricResponse extends Response {
+    
+    private Map<String, Object> metrics = new HashMap<>();
+    
+    public Map<String, Object> getMetrics() {
+        return metrics;
+    }
+    
+    public void setMetrics(Map<String, Object> metrics) {
+        this.metrics = metrics;
+    }
+    
+    public void putMetric(String key, Object value) {
+        metrics.put(key, value);
+    }
+    
+}

api/src/main/java/com/alibaba/nacos/api/config/remote/response/ConfigChangeBatchListenResponse.java

@@ -0,0 +1,157 @@
+/*
+ * Copyright 1999-2018 Alibaba Group Holding Ltd.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * 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.
+ */
+
+package com.alibaba.nacos.api.config.remote.response;
+
+import com.alibaba.nacos.api.remote.response.Response;
+import com.alibaba.nacos.api.remote.response.ResponseCode;
+
+import java.util.ArrayList;
+import java.util.List;
+
+/**
+ * ConfigChangeBatchListenResponse.
+ *
+ * @author liuzunfei
+ * @version $Id: ConfigChangeBatchListenResponse.java, v 0.1 2020年07月14日 3:07 PM liuzunfei Exp $
+ */
+public class ConfigChangeBatchListenResponse extends Response {
+    
+    List<ConfigContext> changedConfigs = new ArrayList<ConfigContext>();
+    
+    public ConfigChangeBatchListenResponse() {
+    }
+    
+    /**
+     * add changed config.
+     *
+     * @param dataId dataId.
+     * @param group  group.
+     * @param tenant tenant.
+     */
+    public void addChangeConfig(String dataId, String group, String tenant) {
+        ConfigContext configContext = new ConfigContext();
+        configContext.dataId = dataId;
+        configContext.group = group;
+        configContext.tenant = tenant;
+        changedConfigs.add(configContext);
+    }
+    
+    /**
+     * Getter method for property <tt>changedConfigs</tt>.
+     *
+     * @return property value of changedConfigs
+     */
+    public List<ConfigContext> getChangedConfigs() {
+        return changedConfigs;
+    }
+    
+    /**
+     * Setter method for property <tt>changedConfigs</tt>.
+     *
+     * @param changedConfigs value to be assigned to property changedConfigs
+     */
+    public void setChangedConfigs(List<ConfigContext> changedConfigs) {
+        this.changedConfigs = changedConfigs;
+    }
+    
+    /**
+     * build fail response.
+     *
+     * @param errorMessage errorMessage.
+     * @return response.
+     */
+    public static ConfigChangeBatchListenResponse buildFailResponse(String errorMessage) {
+        ConfigChangeBatchListenResponse response = new ConfigChangeBatchListenResponse();
+        response.setResultCode(ResponseCode.FAIL.getCode());
+        response.setMessage(errorMessage);
+        return response;
+    }
+    
+    public static class ConfigContext {
+        
+        String group;
+        
+        String dataId;
+        
+        String tenant;
+        
+        public ConfigContext() {
+        
+        }
+        
+        /**
+         * Getter method for property <tt>groupId</tt>.
+         *
+         * @return property value of groupId
+         */
+        public String getGroup() {
+            return group;
+        }
+        
+        /**
+         * Setter method for property <tt>groupId</tt>.
+         *
+         * @param group value to be assigned to property groupId
+         */
+        public void setGroup(String group) {
+            this.group = group;
+        }
+        
+        /**
+         * Getter method for property <tt>dataId</tt>.
+         *
+         * @return property value of dataId
+         */
+        public String getDataId() {
+            return dataId;
+        }
+        
+        /**
+         * Setter method for property <tt>dataId</tt>.
+         *
+         * @param dataId value to be assigned to property dataId
+         */
+        public void setDataId(String dataId) {
+            this.dataId = dataId;
+        }
+        
+        /**
+         * Getter method for property <tt>tenant</tt>.
+         *
+         * @return property value of tenant
+         */
+        public String getTenant() {
+            return tenant;
+        }
+        
+        /**
+         * Setter method for property <tt>tenant</tt>.
+         *
+         * @param tenant value to be assigned to property tenant
+         */
+        public void setTenant(String tenant) {
+            this.tenant = tenant;
+        }
+        
+        @Override
+        public String toString() {
+            return "ConfigContext{" + "group='" + group + '\'' + ", dataId='" + dataId + '\'' + ", tenant='" + tenant
+                    + '\'' + '}';
+        }
+    }
+    
+}

api/src/main/java/com/alibaba/nacos/api/config/remote/response/ConfigChangeNotifyResponse.java

@@ -0,0 +1,28 @@
+/*
+ * Copyright 1999-2020 Alibaba Group Holding Ltd.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * 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.
+ */
+
+package com.alibaba.nacos.api.config.remote.response;
+
+import com.alibaba.nacos.api.remote.response.Response;
+
+/**
+ * config change notify response from client.
+ * @author liuzunfei
+ * @version $Id: ConfigChangeNotifyResponse.java, v 0.1 2020年09月01日 2:59 PM liuzunfei Exp $
+ */
+public class ConfigChangeNotifyResponse extends Response {
+    
+}

api/src/main/java/com/alibaba/nacos/api/config/remote/response/ConfigPublishResponse.java

@@ -0,0 +1,54 @@
+/*
+ * Copyright 1999-2020 Alibaba Group Holding Ltd.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * 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.
+ */
+
+package com.alibaba.nacos.api.config.remote.response;
+
+import com.alibaba.nacos.api.remote.response.Response;
+import com.alibaba.nacos.api.remote.response.ResponseCode;
+
+/**
+ * ConfigPublishResponse.
+ *
+ * @author liuzunfei
+ * @version $Id: ConfigPubishResponse.java, v 0.1 2020年07月16日 4:59 PM liuzunfei Exp $
+ */
+public class ConfigPublishResponse extends Response {
+    
+    public ConfigPublishResponse() {
+        super();
+    }
+    
+    /**
+     * Build success response.
+     *
+     * @return response.
+     */
+    public static ConfigPublishResponse buildSuccessResponse() {
+        return new ConfigPublishResponse();
+    }
+    
+    /**
+     * Build fail response.
+     *
+     * @return response.
+     */
+    public static ConfigPublishResponse buildFailResponse(String errorMsg) {
+        ConfigPublishResponse configPublishResponse = new ConfigPublishResponse();
+        configPublishResponse.setResultCode(ResponseCode.FAIL.getCode());
+        configPublishResponse.setMessage(errorMsg);
+        return configPublishResponse;
+    }
+}

api/src/main/java/com/alibaba/nacos/api/config/remote/response/ConfigQueryResponse.java

@@ -0,0 +1,150 @@
+/*
+ * Copyright 1999-2018 Alibaba Group Holding Ltd.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * 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.
+ */
+
+package com.alibaba.nacos.api.config.remote.response;
+
+import com.alibaba.nacos.api.remote.response.Response;
+
+/**
+ * ConfigQueryResponse.
+ *
+ * @author liuzunfei
+ * @version $Id: ConfigQueryResponse.java, v 0.1 2020年07月14日 2:47 PM liuzunfei Exp $
+ */
+public class ConfigQueryResponse extends Response {
+    
+    public static final int CONFIG_NOT_FOUND = 300;
+    
+    public static final int CONFIG_QUERY_CONFLICT = 400;
+    
+    String content;
+    
+    String encryptedDataKey;
+    
+    String contentType;
+    
+    String md5;
+    
+    long lastModified;
+    
+    boolean isBeta;
+    
+    String tag;
+    
+    public ConfigQueryResponse() {
+    }
+    
+    /**
+     * Build fail response.
+     *
+     * @param errorCode errorCode.
+     * @param message   message.
+     * @return response.
+     */
+    public static ConfigQueryResponse buildFailResponse(int errorCode, String message) {
+        ConfigQueryResponse response = new ConfigQueryResponse();
+        response.setErrorInfo(errorCode, message);
+        return response;
+    }
+    
+    /**
+     * Build success response.
+     *
+     * @param content content.
+     * @return response.
+     */
+    public static ConfigQueryResponse buildSuccessResponse(String content) {
+        ConfigQueryResponse response = new ConfigQueryResponse();
+        response.setContent(content);
+        return response;
+    }
+    
+    public String getTag() {
+        return tag;
+    }
+    
+    public void setTag(String tag) {
+        this.tag = tag;
+    }
+    
+    public String getMd5() {
+        return md5;
+    }
+    
+    public void setMd5(String md5) {
+        this.md5 = md5;
+    }
+    
+    public long getLastModified() {
+        return lastModified;
+    }
+    
+    public void setLastModified(long lastModified) {
+        this.lastModified = lastModified;
+    }
+    
+    public boolean isBeta() {
+        return isBeta;
+    }
+    
+    public void setBeta(boolean beta) {
+        isBeta = beta;
+    }
+    
+    /**
+     * Getter method for property <tt>content</tt>.
+     *
+     * @return property value of content
+     */
+    public String getContent() {
+        return content;
+    }
+    
+    /**
+     * Setter method for property <tt>content</tt>.
+     *
+     * @param content value to be assigned to property content
+     */
+    public void setContent(String content) {
+        this.content = content;
+    }
+    
+    public void setEncryptedDataKey(String encryptedDataKey) {
+        this.encryptedDataKey = encryptedDataKey;
+    }
+    
+    public String getEncryptedDataKey() {
+        return encryptedDataKey;
+    }
+    
+    /**
+     * Getter method for property <tt>contentType</tt>.
+     *
+     * @return property value of contentType
+     */
+    public String getContentType() {
+        return contentType;
+    }
+    
+    /**
+     * Setter method for property <tt>contentType</tt>.
+     *
+     * @param contentType value to be assigned to property contentType
+     */
+    public void setContentType(String contentType) {
+        this.contentType = contentType;
+    }
+}

api/src/main/java/com/alibaba/nacos/api/config/remote/response/ConfigRemoveResponse.java

@@ -0,0 +1,54 @@
+/*
+ * Copyright 1999-2020 Alibaba Group Holding Ltd.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * 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.
+ */
+
+package com.alibaba.nacos.api.config.remote.response;
+
+import com.alibaba.nacos.api.remote.response.Response;
+import com.alibaba.nacos.api.remote.response.ResponseCode;
+
+/**
+ * ConfigPubishResponse.
+ *
+ * @author liuzunfei
+ * @version $Id: ConfigPubishResponse.java, v 0.1 2020年07月16日 4:59 PM liuzunfei Exp $
+ */
+public class ConfigRemoveResponse extends Response {
+    
+    public ConfigRemoveResponse() {
+        super();
+    }
+    
+    /**
+     * Build success response.
+     *
+     * @return response.
+     */
+    public static ConfigRemoveResponse buildSuccessResponse() {
+        return new ConfigRemoveResponse();
+    }
+    
+    /**
+     * Build fail response.
+     *
+     * @return response.
+     */
+    public static ConfigRemoveResponse buildFailResponse(String errorMsg) {
+        ConfigRemoveResponse removeResponse = new ConfigRemoveResponse();
+        removeResponse.setResultCode(ResponseCode.FAIL.getCode());
+        removeResponse.setMessage(errorMsg);
+        return removeResponse;
+    }
+}

api/src/main/java/com/alibaba/nacos/api/config/remote/response/cluster/ConfigChangeClusterSyncResponse.java

@@ -0,0 +1,29 @@
+/*
+ * Copyright 1999-2020 Alibaba Group Holding Ltd.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * 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.
+ */
+
+package com.alibaba.nacos.api.config.remote.response.cluster;
+
+import com.alibaba.nacos.api.remote.response.Response;
+
+/**
+ * config change sync response on clusters.
+ *
+ * @author liuzunfei
+ * @version $Id: ConfigChangeClusterSyncResponse.java, v 0.1 2020年08月11日 4:32 PM liuzunfei Exp $
+ */
+public class ConfigChangeClusterSyncResponse extends Response {
+    
+}

api/src/main/java/com/alibaba/nacos/api/exception/NacosException.java

@@ -108,7 +108,12 @@ public class NacosException extends Exception {
     public static final int CLIENT_INVALID_PARAM = -400;
     
     /**
-     * over client threshold（超过server端的限流阈值）.
+     * client disconnect.
+     */
+    public static final int CLIENT_DISCONNECT = -401;
+    
+    /**
+     * over client threshold（超过client端的限流阈值）.
      */
     public static final int CLIENT_OVER_THRESHOLD = -503;
     
@@ -153,11 +158,28 @@ public class NacosException extends Exception {
      */
     public static final int OVER_THRESHOLD = 503;
     
+    /**
+     * Server is not started.
+     */
+    public static final int INVALID_SERVER_STATUS = 300;
+    
+    /**
+     * Connection is not registered.
+     */
+    public static final int UN_REGISTER = 301;
+    
+    /**
+     * No Handler Found.
+     */
+    public static final int NO_HANDLER = 302;
+    
     public static final int RESOURCE_NOT_FOUND = -404;
     
     /**
-     * http client error code,
-     * ome exceptions that occurred when the use the Nacos RestTemplate and Nacos AsyncRestTemplate.
+     * http client error code, ome exceptions that occurred when the use the Nacos RestTemplate and Nacos
+     * AsyncRestTemplate.
      */
     public static final int HTTP_CLIENT_ERROR_CODE = -500;
+    
+    
 }

api/src/main/java/com/alibaba/nacos/api/grpc/auto/BiRequestStreamGrpc.java

@@ -0,0 +1,286 @@
+/*
+ * Copyright 1999-2020 Alibaba Group Holding Ltd.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * 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.
+ */
+
+package com.alibaba.nacos.api.grpc.auto;
+
+import static io.grpc.MethodDescriptor.generateFullMethodName;
+import static io.grpc.stub.ClientCalls.asyncBidiStreamingCall;
+import static io.grpc.stub.ClientCalls.asyncClientStreamingCall;
+import static io.grpc.stub.ClientCalls.asyncServerStreamingCall;
+import static io.grpc.stub.ClientCalls.asyncUnaryCall;
+import static io.grpc.stub.ClientCalls.blockingServerStreamingCall;
+import static io.grpc.stub.ClientCalls.blockingUnaryCall;
+import static io.grpc.stub.ClientCalls.futureUnaryCall;
+import static io.grpc.stub.ServerCalls.asyncBidiStreamingCall;
+import static io.grpc.stub.ServerCalls.asyncClientStreamingCall;
+import static io.grpc.stub.ServerCalls.asyncServerStreamingCall;
+import static io.grpc.stub.ServerCalls.asyncUnaryCall;
+import static io.grpc.stub.ServerCalls.asyncUnimplementedStreamingCall;
+import static io.grpc.stub.ServerCalls.asyncUnimplementedUnaryCall;
+
+/**
+ */
+@javax.annotation.Generated(
+    value = "by gRPC proto compiler (version 1.14.0)",
+    comments = "Source: nacos_grpc_service.proto")
+public final class BiRequestStreamGrpc {
+
+  private BiRequestStreamGrpc() {}
+
+  public static final String SERVICE_NAME = "BiRequestStream";
+
+  // Static method descriptors that strictly reflect the proto.
+  private static volatile io.grpc.MethodDescriptor<com.alibaba.nacos.api.grpc.auto.Payload,
+      com.alibaba.nacos.api.grpc.auto.Payload> getRequestBiStreamMethod;
+
+  @io.grpc.stub.annotations.RpcMethod(
+      fullMethodName = SERVICE_NAME + '/' + "requestBiStream",
+      requestType = com.alibaba.nacos.api.grpc.auto.Payload.class,
+      responseType = com.alibaba.nacos.api.grpc.auto.Payload.class,
+      methodType = io.grpc.MethodDescriptor.MethodType.BIDI_STREAMING)
+  public static io.grpc.MethodDescriptor<com.alibaba.nacos.api.grpc.auto.Payload,
+      com.alibaba.nacos.api.grpc.auto.Payload> getRequestBiStreamMethod() {
+    io.grpc.MethodDescriptor<com.alibaba.nacos.api.grpc.auto.Payload, com.alibaba.nacos.api.grpc.auto.Payload> getRequestBiStreamMethod;
+    if ((getRequestBiStreamMethod = BiRequestStreamGrpc.getRequestBiStreamMethod) == null) {
+      synchronized (BiRequestStreamGrpc.class) {
+        if ((getRequestBiStreamMethod = BiRequestStreamGrpc.getRequestBiStreamMethod) == null) {
+          BiRequestStreamGrpc.getRequestBiStreamMethod = getRequestBiStreamMethod = 
+              io.grpc.MethodDescriptor.<com.alibaba.nacos.api.grpc.auto.Payload, com.alibaba.nacos.api.grpc.auto.Payload>newBuilder()
+              .setType(io.grpc.MethodDescriptor.MethodType.BIDI_STREAMING)
+              .setFullMethodName(generateFullMethodName(
+                  "BiRequestStream", "requestBiStream"))
+              .setSampledToLocalTracing(true)
+              .setRequestMarshaller(io.grpc.protobuf.ProtoUtils.marshaller(
+                  com.alibaba.nacos.api.grpc.auto.Payload.getDefaultInstance()))
+              .setResponseMarshaller(io.grpc.protobuf.ProtoUtils.marshaller(
+                  com.alibaba.nacos.api.grpc.auto.Payload.getDefaultInstance()))
+                  .setSchemaDescriptor(new BiRequestStreamMethodDescriptorSupplier("requestBiStream"))
+                  .build();
+          }
+        }
+     }
+     return getRequestBiStreamMethod;
+  }
+
+  /**
+   * Creates a new async stub that supports all call types for the service
+   */
+  public static BiRequestStreamStub newStub(io.grpc.Channel channel) {
+    return new BiRequestStreamStub(channel);
+  }
+
+  /**
+   * Creates a new blocking-style stub that supports unary and streaming output calls on the service
+   */
+  public static BiRequestStreamBlockingStub newBlockingStub(
+      io.grpc.Channel channel) {
+    return new BiRequestStreamBlockingStub(channel);
+  }
+
+  /**
+   * Creates a new ListenableFuture-style stub that supports unary calls on the service
+   */
+  public static BiRequestStreamFutureStub newFutureStub(
+      io.grpc.Channel channel) {
+    return new BiRequestStreamFutureStub(channel);
+  }
+
+  /**
+   */
+  public static abstract class BiRequestStreamImplBase implements io.grpc.BindableService {
+
+    /**
+     * <pre>
+     * Sends a commonRequest
+     * </pre>
+     */
+    public io.grpc.stub.StreamObserver<com.alibaba.nacos.api.grpc.auto.Payload> requestBiStream(
+        io.grpc.stub.StreamObserver<com.alibaba.nacos.api.grpc.auto.Payload> responseObserver) {
+      return asyncUnimplementedStreamingCall(getRequestBiStreamMethod(), responseObserver);
+    }
+
+    @Override public final io.grpc.ServerServiceDefinition bindService() {
+      return io.grpc.ServerServiceDefinition.builder(getServiceDescriptor())
+          .addMethod(
+            getRequestBiStreamMethod(),
+            asyncBidiStreamingCall(
+              new MethodHandlers<
+                com.alibaba.nacos.api.grpc.auto.Payload,
+                com.alibaba.nacos.api.grpc.auto.Payload>(
+                  this, METHODID_REQUEST_BI_STREAM)))
+          .build();
+    }
+  }
+
+  /**
+   */
+  public static final class BiRequestStreamStub extends io.grpc.stub.AbstractStub<BiRequestStreamStub> {
+    private BiRequestStreamStub(io.grpc.Channel channel) {
+      super(channel);
+    }
+
+    private BiRequestStreamStub(io.grpc.Channel channel,
+        io.grpc.CallOptions callOptions) {
+      super(channel, callOptions);
+    }
+
+    @Override
+    protected BiRequestStreamStub build(io.grpc.Channel channel,
+        io.grpc.CallOptions callOptions) {
+      return new BiRequestStreamStub(channel, callOptions);
+    }
+
+    /**
+     * <pre>
+     * Sends a commonRequest
+     * </pre>
+     */
+    public io.grpc.stub.StreamObserver<com.alibaba.nacos.api.grpc.auto.Payload> requestBiStream(
+        io.grpc.stub.StreamObserver<com.alibaba.nacos.api.grpc.auto.Payload> responseObserver) {
+      return asyncBidiStreamingCall(
+          getChannel().newCall(getRequestBiStreamMethod(), getCallOptions()), responseObserver);
+    }
+  }
+
+  /**
+   */
+  public static final class BiRequestStreamBlockingStub extends io.grpc.stub.AbstractStub<BiRequestStreamBlockingStub> {
+    private BiRequestStreamBlockingStub(io.grpc.Channel channel) {
+      super(channel);
+    }
+
+    private BiRequestStreamBlockingStub(io.grpc.Channel channel,
+        io.grpc.CallOptions callOptions) {
+      super(channel, callOptions);
+    }
+
+    @Override
+    protected BiRequestStreamBlockingStub build(io.grpc.Channel channel,
+        io.grpc.CallOptions callOptions) {
+      return new BiRequestStreamBlockingStub(channel, callOptions);
+    }
+  }
+
+  /**
+   */
+  public static final class BiRequestStreamFutureStub extends io.grpc.stub.AbstractStub<BiRequestStreamFutureStub> {
+    private BiRequestStreamFutureStub(io.grpc.Channel channel) {
+      super(channel);
+    }
+
+    private BiRequestStreamFutureStub(io.grpc.Channel channel,
+        io.grpc.CallOptions callOptions) {
+      super(channel, callOptions);
+    }
+
+    @Override
+    protected BiRequestStreamFutureStub build(io.grpc.Channel channel,
+        io.grpc.CallOptions callOptions) {
+      return new BiRequestStreamFutureStub(channel, callOptions);
+    }
+  }
+
+  private static final int METHODID_REQUEST_BI_STREAM = 0;
+
+  private static final class MethodHandlers<Req, Resp> implements
+      io.grpc.stub.ServerCalls.UnaryMethod<Req, Resp>,
+      io.grpc.stub.ServerCalls.ServerStreamingMethod<Req, Resp>,
+      io.grpc.stub.ServerCalls.ClientStreamingMethod<Req, Resp>,
+      io.grpc.stub.ServerCalls.BidiStreamingMethod<Req, Resp> {
+    private final BiRequestStreamImplBase serviceImpl;
+    private final int methodId;
+
+    MethodHandlers(BiRequestStreamImplBase serviceImpl, int methodId) {
+      this.serviceImpl = serviceImpl;
+      this.methodId = methodId;
+    }
+
+    @Override
+    @SuppressWarnings("unchecked")
+    public void invoke(Req request, io.grpc.stub.StreamObserver<Resp> responseObserver) {
+      switch (methodId) {
+        default:
+          throw new AssertionError();
+      }
+    }
+
+    @Override
+    @SuppressWarnings("unchecked")
+    public io.grpc.stub.StreamObserver<Req> invoke(
+        io.grpc.stub.StreamObserver<Resp> responseObserver) {
+      switch (methodId) {
+        case METHODID_REQUEST_BI_STREAM:
+          return (io.grpc.stub.StreamObserver<Req>) serviceImpl.requestBiStream(
+              (io.grpc.stub.StreamObserver<com.alibaba.nacos.api.grpc.auto.Payload>) responseObserver);
+        default:
+          throw new AssertionError();
+      }
+    }
+  }
+
+  private static abstract class BiRequestStreamBaseDescriptorSupplier
+      implements io.grpc.protobuf.ProtoFileDescriptorSupplier, io.grpc.protobuf.ProtoServiceDescriptorSupplier {
+    BiRequestStreamBaseDescriptorSupplier() {}
+
+    @Override
+    public com.google.protobuf.Descriptors.FileDescriptor getFileDescriptor() {
+      return com.alibaba.nacos.api.grpc.auto.NacosGrpcService.getDescriptor();
+    }
+
+    @Override
+    public com.google.protobuf.Descriptors.ServiceDescriptor getServiceDescriptor() {
+      return getFileDescriptor().findServiceByName("BiRequestStream");
+    }
+  }
+
+  private static final class BiRequestStreamFileDescriptorSupplier
+      extends BiRequestStreamBaseDescriptorSupplier {
+    BiRequestStreamFileDescriptorSupplier() {}
+  }
+
+  private static final class BiRequestStreamMethodDescriptorSupplier
+      extends BiRequestStreamBaseDescriptorSupplier
+      implements io.grpc.protobuf.ProtoMethodDescriptorSupplier {
+    private final String methodName;
+
+    BiRequestStreamMethodDescriptorSupplier(String methodName) {
+      this.methodName = methodName;
+    }
+
+    @Override
+    public com.google.protobuf.Descriptors.MethodDescriptor getMethodDescriptor() {
+      return getServiceDescriptor().findMethodByName(methodName);
+    }
+  }
+
+  private static volatile io.grpc.ServiceDescriptor serviceDescriptor;
+
+  public static io.grpc.ServiceDescriptor getServiceDescriptor() {
+    io.grpc.ServiceDescriptor result = serviceDescriptor;
+    if (result == null) {
+      synchronized (BiRequestStreamGrpc.class) {
+        result = serviceDescriptor;
+        if (result == null) {
+          serviceDescriptor = result = io.grpc.ServiceDescriptor.newBuilder(SERVICE_NAME)
+              .setSchemaDescriptor(new BiRequestStreamFileDescriptorSupplier())
+              .addMethod(getRequestBiStreamMethod())
+              .build();
+        }
+      }
+    }
+    return result;
+  }
+}

api/src/main/java/com/alibaba/nacos/api/grpc/auto/Metadata.java

@@ -0,0 +1,962 @@
+/*
+ * Copyright 1999-2020 Alibaba Group Holding Ltd.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * 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.
+ */
+
+package com.alibaba.nacos.api.grpc.auto;
+
+/**
+ * Protobuf type {@code Metadata}
+ */
+public  final class Metadata extends
+    com.google.protobuf.GeneratedMessageV3 implements
+    // @@protoc_insertion_point(message_implements:Metadata)
+    MetadataOrBuilder {
+private static final long serialVersionUID = 0L;
+  // Use Metadata.newBuilder() to construct.
+  private Metadata(com.google.protobuf.GeneratedMessageV3.Builder<?> builder) {
+    super(builder);
+  }
+  private Metadata() {
+    type_ = "";
+    clientIp_ = "";
+  }
+
+  @Override
+  @SuppressWarnings({"unused"})
+  protected Object newInstance(
+      UnusedPrivateParameter unused) {
+    return new Metadata();
+  }
+
+  @Override
+  public final com.google.protobuf.UnknownFieldSet
+  getUnknownFields() {
+    return this.unknownFields;
+  }
+  private Metadata(
+      com.google.protobuf.CodedInputStream input,
+      com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    this();
+    if (extensionRegistry == null) {
+      throw new NullPointerException();
+    }
+    int mutable_bitField0_ = 0;
+    com.google.protobuf.UnknownFieldSet.Builder unknownFields =
+        com.google.protobuf.UnknownFieldSet.newBuilder();
+    try {
+      boolean done = false;
+      while (!done) {
+        int tag = input.readTag();
+        switch (tag) {
+          case 0:
+            done = true;
+            break;
+          case 26: {
+            String s = input.readStringRequireUtf8();
+
+            type_ = s;
+            break;
+          }
+          case 58: {
+            if (!((mutable_bitField0_ & 0x00000001) != 0)) {
+              headers_ = com.google.protobuf.MapField.newMapField(
+                  HeadersDefaultEntryHolder.defaultEntry);
+              mutable_bitField0_ |= 0x00000001;
+            }
+            com.google.protobuf.MapEntry<String, String>
+            headers__ = input.readMessage(
+                HeadersDefaultEntryHolder.defaultEntry.getParserForType(), extensionRegistry);
+            headers_.getMutableMap().put(
+                headers__.getKey(), headers__.getValue());
+            break;
+          }
+          case 66: {
+            String s = input.readStringRequireUtf8();
+
+            clientIp_ = s;
+            break;
+          }
+          default: {
+            if (!parseUnknownField(
+                input, unknownFields, extensionRegistry, tag)) {
+              done = true;
+            }
+            break;
+          }
+        }
+      }
+    } catch (com.google.protobuf.InvalidProtocolBufferException e) {
+      throw e.setUnfinishedMessage(this);
+    } catch (java.io.IOException e) {
+      throw new com.google.protobuf.InvalidProtocolBufferException(
+          e).setUnfinishedMessage(this);
+    } finally {
+      this.unknownFields = unknownFields.build();
+      makeExtensionsImmutable();
+    }
+  }
+  public static final com.google.protobuf.Descriptors.Descriptor
+      getDescriptor() {
+    return NacosGrpcService.internal_static_Metadata_descriptor;
+  }
+
+  @SuppressWarnings({"rawtypes"})
+  @Override
+  protected com.google.protobuf.MapField internalGetMapField(
+      int number) {
+    switch (number) {
+      case 7:
+        return internalGetHeaders();
+      default:
+        throw new RuntimeException(
+            "Invalid map field number: " + number);
+    }
+  }
+  @Override
+  protected FieldAccessorTable
+      internalGetFieldAccessorTable() {
+    return NacosGrpcService.internal_static_Metadata_fieldAccessorTable
+        .ensureFieldAccessorsInitialized(
+            Metadata.class, Builder.class);
+  }
+
+  public static final int TYPE_FIELD_NUMBER = 3;
+  private volatile Object type_;
+  /**
+   * <code>string type = 3;</code>
+   */
+  public String getType() {
+    Object ref = type_;
+    if (ref instanceof String) {
+      return (String) ref;
+    } else {
+      com.google.protobuf.ByteString bs = 
+          (com.google.protobuf.ByteString) ref;
+      String s = bs.toStringUtf8();
+      type_ = s;
+      return s;
+    }
+  }
+  /**
+   * <code>string type = 3;</code>
+   */
+  public com.google.protobuf.ByteString
+      getTypeBytes() {
+    Object ref = type_;
+    if (ref instanceof String) {
+      com.google.protobuf.ByteString b = 
+          com.google.protobuf.ByteString.copyFromUtf8(
+              (String) ref);
+      type_ = b;
+      return b;
+    } else {
+      return (com.google.protobuf.ByteString) ref;
+    }
+  }
+
+  public static final int CLIENTIP_FIELD_NUMBER = 8;
+  private volatile Object clientIp_;
+  /**
+   * <code>string clientIp = 8;</code>
+   */
+  public String getClientIp() {
+    Object ref = clientIp_;
+    if (ref instanceof String) {
+      return (String) ref;
+    } else {
+      com.google.protobuf.ByteString bs = 
+          (com.google.protobuf.ByteString) ref;
+      String s = bs.toStringUtf8();
+      clientIp_ = s;
+      return s;
+    }
+  }
+  /**
+   * <code>string clientIp = 8;</code>
+   */
+  public com.google.protobuf.ByteString
+      getClientIpBytes() {
+    Object ref = clientIp_;
+    if (ref instanceof String) {
+      com.google.protobuf.ByteString b = 
+          com.google.protobuf.ByteString.copyFromUtf8(
+              (String) ref);
+      clientIp_ = b;
+      return b;
+    } else {
+      return (com.google.protobuf.ByteString) ref;
+    }
+  }
+
+  public static final int HEADERS_FIELD_NUMBER = 7;
+  private static final class HeadersDefaultEntryHolder {
+    static final com.google.protobuf.MapEntry<
+        String, String> defaultEntry =
+            com.google.protobuf.MapEntry
+            .<String, String>newDefaultInstance(
+                NacosGrpcService.internal_static_Metadata_HeadersEntry_descriptor,
+                com.google.protobuf.WireFormat.FieldType.STRING,
+                "",
+                com.google.protobuf.WireFormat.FieldType.STRING,
+                "");
+  }
+  private com.google.protobuf.MapField<
+      String, String> headers_;
+  private com.google.protobuf.MapField<String, String>
+  internalGetHeaders() {
+    if (headers_ == null) {
+      return com.google.protobuf.MapField.emptyMapField(
+          HeadersDefaultEntryHolder.defaultEntry);
+    }
+    return headers_;
+  }
+
+  public int getHeadersCount() {
+    return internalGetHeaders().getMap().size();
+  }
+  /**
+   * <code>map&lt;string, string&gt; headers = 7;</code>
+   */
+
+  public boolean containsHeaders(
+      String key) {
+    if (key == null) { throw new NullPointerException(); }
+    return internalGetHeaders().getMap().containsKey(key);
+  }
+  /**
+   * Use {@link #getHeadersMap()} instead.
+   */
+  @Deprecated
+  public java.util.Map<String, String> getHeaders() {
+    return getHeadersMap();
+  }
+  /**
+   * <code>map&lt;string, string&gt; headers = 7;</code>
+   */
+
+  public java.util.Map<String, String> getHeadersMap() {
+    return internalGetHeaders().getMap();
+  }
+  /**
+   * <code>map&lt;string, string&gt; headers = 7;</code>
+   */
+
+  public String getHeadersOrDefault(
+      String key,
+      String defaultValue) {
+    if (key == null) { throw new NullPointerException(); }
+    java.util.Map<String, String> map =
+        internalGetHeaders().getMap();
+    return map.containsKey(key) ? map.get(key) : defaultValue;
+  }
+  /**
+   * <code>map&lt;string, string&gt; headers = 7;</code>
+   */
+
+  public String getHeadersOrThrow(
+      String key) {
+    if (key == null) { throw new NullPointerException(); }
+    java.util.Map<String, String> map =
+        internalGetHeaders().getMap();
+    if (!map.containsKey(key)) {
+      throw new IllegalArgumentException();
+    }
+    return map.get(key);
+  }
+
+  private byte memoizedIsInitialized = -1;
+  @Override
+  public final boolean isInitialized() {
+    byte isInitialized = memoizedIsInitialized;
+    if (isInitialized == 1) return true;
+    if (isInitialized == 0) return false;
+
+    memoizedIsInitialized = 1;
+    return true;
+  }
+
+  @Override
+  public void writeTo(com.google.protobuf.CodedOutputStream output)
+                      throws java.io.IOException {
+    if (!getTypeBytes().isEmpty()) {
+      com.google.protobuf.GeneratedMessageV3.writeString(output, 3, type_);
+    }
+    com.google.protobuf.GeneratedMessageV3
+      .serializeStringMapTo(
+        output,
+        internalGetHeaders(),
+        HeadersDefaultEntryHolder.defaultEntry,
+        7);
+    if (!getClientIpBytes().isEmpty()) {
+      com.google.protobuf.GeneratedMessageV3.writeString(output, 8, clientIp_);
+    }
+    unknownFields.writeTo(output);
+  }
+
+  @Override
+  public int getSerializedSize() {
+    int size = memoizedSize;
+    if (size != -1) return size;
+
+    size = 0;
+    if (!getTypeBytes().isEmpty()) {
+      size += com.google.protobuf.GeneratedMessageV3.computeStringSize(3, type_);
+    }
+    for (java.util.Map.Entry<String, String> entry
+         : internalGetHeaders().getMap().entrySet()) {
+      com.google.protobuf.MapEntry<String, String>
+      headers__ = HeadersDefaultEntryHolder.defaultEntry.newBuilderForType()
+          .setKey(entry.getKey())
+          .setValue(entry.getValue())
+          .build();
+      size += com.google.protobuf.CodedOutputStream
+          .computeMessageSize(7, headers__);
+    }
+    if (!getClientIpBytes().isEmpty()) {
+      size += com.google.protobuf.GeneratedMessageV3.computeStringSize(8, clientIp_);
+    }
+    size += unknownFields.getSerializedSize();
+    memoizedSize = size;
+    return size;
+  }
+
+  @Override
+  public boolean equals(final Object obj) {
+    if (obj == this) {
+     return true;
+    }
+    if (!(obj instanceof Metadata)) {
+      return super.equals(obj);
+    }
+    Metadata other = (Metadata) obj;
+
+    if (!getType()
+        .equals(other.getType())) return false;
+    if (!getClientIp()
+        .equals(other.getClientIp())) return false;
+    if (!internalGetHeaders().equals(
+        other.internalGetHeaders())) return false;
+    if (!unknownFields.equals(other.unknownFields)) return false;
+    return true;
+  }
+
+  @Override
+  public int hashCode() {
+    if (memoizedHashCode != 0) {
+      return memoizedHashCode;
+    }
+    int hash = 41;
+    hash = (19 * hash) + getDescriptor().hashCode();
+    hash = (37 * hash) + TYPE_FIELD_NUMBER;
+    hash = (53 * hash) + getType().hashCode();
+    hash = (37 * hash) + CLIENTIP_FIELD_NUMBER;
+    hash = (53 * hash) + getClientIp().hashCode();
+    if (!internalGetHeaders().getMap().isEmpty()) {
+      hash = (37 * hash) + HEADERS_FIELD_NUMBER;
+      hash = (53 * hash) + internalGetHeaders().hashCode();
+    }
+    hash = (29 * hash) + unknownFields.hashCode();
+    memoizedHashCode = hash;
+    return hash;
+  }
+
+  public static Metadata parseFrom(
+      java.nio.ByteBuffer data)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data);
+  }
+  public static Metadata parseFrom(
+      java.nio.ByteBuffer data,
+      com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data, extensionRegistry);
+  }
+  public static Metadata parseFrom(
+      com.google.protobuf.ByteString data)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data);
+  }
+  public static Metadata parseFrom(
+      com.google.protobuf.ByteString data,
+      com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data, extensionRegistry);
+  }
+  public static Metadata parseFrom(byte[] data)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data);
+  }
+  public static Metadata parseFrom(
+      byte[] data,
+      com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data, extensionRegistry);
+  }
+  public static Metadata parseFrom(java.io.InputStream input)
+      throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessageV3
+        .parseWithIOException(PARSER, input);
+  }
+  public static Metadata parseFrom(
+      java.io.InputStream input,
+      com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessageV3
+        .parseWithIOException(PARSER, input, extensionRegistry);
+  }
+  public static Metadata parseDelimitedFrom(java.io.InputStream input)
+      throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessageV3
+        .parseDelimitedWithIOException(PARSER, input);
+  }
+  public static Metadata parseDelimitedFrom(
+      java.io.InputStream input,
+      com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessageV3
+        .parseDelimitedWithIOException(PARSER, input, extensionRegistry);
+  }
+  public static Metadata parseFrom(
+      com.google.protobuf.CodedInputStream input)
+      throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessageV3
+        .parseWithIOException(PARSER, input);
+  }
+  public static Metadata parseFrom(
+      com.google.protobuf.CodedInputStream input,
+      com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessageV3
+        .parseWithIOException(PARSER, input, extensionRegistry);
+  }
+
+  @Override
+  public Builder newBuilderForType() { return newBuilder(); }
+  public static Builder newBuilder() {
+    return DEFAULT_INSTANCE.toBuilder();
+  }
+  public static Builder newBuilder(Metadata prototype) {
+    return DEFAULT_INSTANCE.toBuilder().mergeFrom(prototype);
+  }
+  @Override
+  public Builder toBuilder() {
+    return this == DEFAULT_INSTANCE
+        ? new Builder() : new Builder().mergeFrom(this);
+  }
+
+  @Override
+  protected Builder newBuilderForType(
+      BuilderParent parent) {
+    Builder builder = new Builder(parent);
+    return builder;
+  }
+  /**
+   * Protobuf type {@code Metadata}
+   */
+  public static final class Builder extends
+      com.google.protobuf.GeneratedMessageV3.Builder<Builder> implements
+      // @@protoc_insertion_point(builder_implements:Metadata)
+      MetadataOrBuilder {
+    public static final com.google.protobuf.Descriptors.Descriptor
+        getDescriptor() {
+      return NacosGrpcService.internal_static_Metadata_descriptor;
+    }
+
+    @SuppressWarnings({"rawtypes"})
+    protected com.google.protobuf.MapField internalGetMapField(
+        int number) {
+      switch (number) {
+        case 7:
+          return internalGetHeaders();
+        default:
+          throw new RuntimeException(
+              "Invalid map field number: " + number);
+      }
+    }
+    @SuppressWarnings({"rawtypes"})
+    protected com.google.protobuf.MapField internalGetMutableMapField(
+        int number) {
+      switch (number) {
+        case 7:
+          return internalGetMutableHeaders();
+        default:
+          throw new RuntimeException(
+              "Invalid map field number: " + number);
+      }
+    }
+    @Override
+    protected FieldAccessorTable
+        internalGetFieldAccessorTable() {
+      return NacosGrpcService.internal_static_Metadata_fieldAccessorTable
+          .ensureFieldAccessorsInitialized(
+              Metadata.class, Builder.class);
+    }
+
+    // Construct using com.alibaba.nacos.api.grpc.auto.Metadata.newBuilder()
+    private Builder() {
+      maybeForceBuilderInitialization();
+    }
+
+    private Builder(
+        BuilderParent parent) {
+      super(parent);
+      maybeForceBuilderInitialization();
+    }
+    private void maybeForceBuilderInitialization() {
+      if (com.google.protobuf.GeneratedMessageV3
+              .alwaysUseFieldBuilders) {
+      }
+    }
+    @Override
+    public Builder clear() {
+      super.clear();
+      type_ = "";
+
+      clientIp_ = "";
+
+      internalGetMutableHeaders().clear();
+      return this;
+    }
+
+    @Override
+    public com.google.protobuf.Descriptors.Descriptor
+        getDescriptorForType() {
+      return NacosGrpcService.internal_static_Metadata_descriptor;
+    }
+
+    @Override
+    public Metadata getDefaultInstanceForType() {
+      return Metadata.getDefaultInstance();
+    }
+
+    @Override
+    public Metadata build() {
+      Metadata result = buildPartial();
+      if (!result.isInitialized()) {
+        throw newUninitializedMessageException(result);
+      }
+      return result;
+    }
+
+    @Override
+    public Metadata buildPartial() {
+      Metadata result = new Metadata(this);
+      int from_bitField0_ = bitField0_;
+      result.type_ = type_;
+      result.clientIp_ = clientIp_;
+      result.headers_ = internalGetHeaders();
+      result.headers_.makeImmutable();
+      onBuilt();
+      return result;
+    }
+
+    @Override
+    public Builder clone() {
+      return super.clone();
+    }
+    @Override
+    public Builder setField(
+        com.google.protobuf.Descriptors.FieldDescriptor field,
+        Object value) {
+      return super.setField(field, value);
+    }
+    @Override
+    public Builder clearField(
+        com.google.protobuf.Descriptors.FieldDescriptor field) {
+      return super.clearField(field);
+    }
+    @Override
+    public Builder clearOneof(
+        com.google.protobuf.Descriptors.OneofDescriptor oneof) {
+      return super.clearOneof(oneof);
+    }
+    @Override
+    public Builder setRepeatedField(
+        com.google.protobuf.Descriptors.FieldDescriptor field,
+        int index, Object value) {
+      return super.setRepeatedField(field, index, value);
+    }
+    @Override
+    public Builder addRepeatedField(
+        com.google.protobuf.Descriptors.FieldDescriptor field,
+        Object value) {
+      return super.addRepeatedField(field, value);
+    }
+    @Override
+    public Builder mergeFrom(com.google.protobuf.Message other) {
+      if (other instanceof Metadata) {
+        return mergeFrom((Metadata)other);
+      } else {
+        super.mergeFrom(other);
+        return this;
+      }
+    }
+
+    public Builder mergeFrom(Metadata other) {
+      if (other == Metadata.getDefaultInstance()) return this;
+      if (!other.getType().isEmpty()) {
+        type_ = other.type_;
+        onChanged();
+      }
+      if (!other.getClientIp().isEmpty()) {
+        clientIp_ = other.clientIp_;
+        onChanged();
+      }
+      internalGetMutableHeaders().mergeFrom(
+          other.internalGetHeaders());
+      this.mergeUnknownFields(other.unknownFields);
+      onChanged();
+      return this;
+    }
+
+    @Override
+    public final boolean isInitialized() {
+      return true;
+    }
+
+    @Override
+    public Builder mergeFrom(
+        com.google.protobuf.CodedInputStream input,
+        com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+        throws java.io.IOException {
+      Metadata parsedMessage = null;
+      try {
+        parsedMessage = PARSER.parsePartialFrom(input, extensionRegistry);
+      } catch (com.google.protobuf.InvalidProtocolBufferException e) {
+        parsedMessage = (Metadata) e.getUnfinishedMessage();
+        throw e.unwrapIOException();
+      } finally {
+        if (parsedMessage != null) {
+          mergeFrom(parsedMessage);
+        }
+      }
+      return this;
+    }
+    private int bitField0_;
+
+    private Object type_ = "";
+    /**
+     * <code>string type = 3;</code>
+     */
+    public String getType() {
+      Object ref = type_;
+      if (!(ref instanceof String)) {
+        com.google.protobuf.ByteString bs =
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+        String s = bs.toStringUtf8();
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+        return s;
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+        type_ = b;
+        return b;
+      } else {
+        return (com.google.protobuf.ByteString) ref;
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+    /**
+     * <code>string type = 3;</code>
+     */
+    public Builder setType(
+        String value) {
+      if (value == null) {
+    throw new NullPointerException();
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+  
+      type_ = value;
+      onChanged();
+      return this;
+    }
+    /**
+     * <code>string type = 3;</code>
+     */
+    public Builder clearType() {
+      
+      type_ = getDefaultInstance().getType();
+      onChanged();
+      return this;
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+    /**
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+     */
+    public Builder setTypeBytes(
+        com.google.protobuf.ByteString value) {
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+      type_ = value;
+      onChanged();
+      return this;
+    }
+
+    private Object clientIp_ = "";
+    /**
+     * <code>string clientIp = 8;</code>
+     */
+    public String getClientIp() {
+      Object ref = clientIp_;
+      if (!(ref instanceof String)) {
+        com.google.protobuf.ByteString bs =
+            (com.google.protobuf.ByteString) ref;
+        String s = bs.toStringUtf8();
+        clientIp_ = s;
+        return s;
+      } else {
+        return (String) ref;
+      }
+    }
+    /**
+     * <code>string clientIp = 8;</code>
+     */
+    public com.google.protobuf.ByteString
+        getClientIpBytes() {
+      Object ref = clientIp_;
+      if (ref instanceof String) {
+        com.google.protobuf.ByteString b = 
+            com.google.protobuf.ByteString.copyFromUtf8(
+                (String) ref);
+        clientIp_ = b;
+        return b;
+      } else {
+        return (com.google.protobuf.ByteString) ref;
+      }
+    }
+    /**
+     * <code>string clientIp = 8;</code>
+     */
+    public Builder setClientIp(
+        String value) {
+      if (value == null) {
+    throw new NullPointerException();
+  }
+  
+      clientIp_ = value;
+      onChanged();
+      return this;
+    }
+    /**
+     * <code>string clientIp = 8;</code>
+     */
+    public Builder clearClientIp() {
+      
+      clientIp_ = getDefaultInstance().getClientIp();
+      onChanged();
+      return this;
+    }
+    /**
+     * <code>string clientIp = 8;</code>
+     */
+    public Builder setClientIpBytes(
+        com.google.protobuf.ByteString value) {
+      if (value == null) {
+    throw new NullPointerException();
+  }
+  checkByteStringIsUtf8(value);
+      
+      clientIp_ = value;
+      onChanged();
+      return this;
+    }
+
+    private com.google.protobuf.MapField<
+        String, String> headers_;
+    private com.google.protobuf.MapField<String, String>
+    internalGetHeaders() {
+      if (headers_ == null) {
+        return com.google.protobuf.MapField.emptyMapField(
+            HeadersDefaultEntryHolder.defaultEntry);
+      }
+      return headers_;
+    }
+    private com.google.protobuf.MapField<String, String>
+    internalGetMutableHeaders() {
+      onChanged();;
+      if (headers_ == null) {
+        headers_ = com.google.protobuf.MapField.newMapField(
+            HeadersDefaultEntryHolder.defaultEntry);
+      }
+      if (!headers_.isMutable()) {
+        headers_ = headers_.copy();
+      }
+      return headers_;
+    }
+
+    public int getHeadersCount() {
+      return internalGetHeaders().getMap().size();
+    }
+    /**
+     * <code>map&lt;string, string&gt; headers = 7;</code>
+     */
+
+    public boolean containsHeaders(
+        String key) {
+      if (key == null) { throw new NullPointerException(); }
+      return internalGetHeaders().getMap().containsKey(key);
+    }
+    /**
+     * Use {@link #getHeadersMap()} instead.
+     */
+    @Deprecated
+    public java.util.Map<String, String> getHeaders() {
+      return getHeadersMap();
+    }
+    /**
+     * <code>map&lt;string, string&gt; headers = 7;</code>
+     */
+
+    public java.util.Map<String, String> getHeadersMap() {
+      return internalGetHeaders().getMap();
+    }
+    /**
+     * <code>map&lt;string, string&gt; headers = 7;</code>
+     */
+
+    public String getHeadersOrDefault(
+        String key,
+        String defaultValue) {
+      if (key == null) { throw new NullPointerException(); }
+      java.util.Map<String, String> map =
+          internalGetHeaders().getMap();
+      return map.containsKey(key) ? map.get(key) : defaultValue;
+    }
+    /**
+     * <code>map&lt;string, string&gt; headers = 7;</code>
+     */
+
+    public String getHeadersOrThrow(
+        String key) {
+      if (key == null) { throw new NullPointerException(); }
+      java.util.Map<String, String> map =
+          internalGetHeaders().getMap();
+      if (!map.containsKey(key)) {
+        throw new IllegalArgumentException();
+      }
+      return map.get(key);
+    }
+
+    public Builder clearHeaders() {
+      internalGetMutableHeaders().getMutableMap()
+          .clear();
+      return this;
+    }
+    /**
+     * <code>map&lt;string, string&gt; headers = 7;</code>
+     */
+
+    public Builder removeHeaders(
+        String key) {
+      if (key == null) { throw new NullPointerException(); }
+      internalGetMutableHeaders().getMutableMap()
+          .remove(key);
+      return this;
+    }
+    /**
+     * Use alternate mutation accessors instead.
+     */
+    @Deprecated
+    public java.util.Map<String, String>
+    getMutableHeaders() {
+      return internalGetMutableHeaders().getMutableMap();
+    }
+    /**
+     * <code>map&lt;string, string&gt; headers = 7;</code>
+     */
+    public Builder putHeaders(
+        String key,
+        String value) {
+      if (key == null) { throw new NullPointerException(); }
+      if (value == null) { throw new NullPointerException(); }
+      internalGetMutableHeaders().getMutableMap()
+          .put(key, value);
+      return this;
+    }
+    /**
+     * <code>map&lt;string, string&gt; headers = 7;</code>
+     */
+
+    public Builder putAllHeaders(
+        java.util.Map<String, String> values) {
+      internalGetMutableHeaders().getMutableMap()
+          .putAll(values);
+      return this;
+    }
+    @Override
+    public final Builder setUnknownFields(
+        final com.google.protobuf.UnknownFieldSet unknownFields) {
+      return super.setUnknownFields(unknownFields);
+    }
+
+    @Override
+    public final Builder mergeUnknownFields(
+        final com.google.protobuf.UnknownFieldSet unknownFields) {
+      return super.mergeUnknownFields(unknownFields);
+    }
+
+
+    // @@protoc_insertion_point(builder_scope:Metadata)
+  }
+
+  // @@protoc_insertion_point(class_scope:Metadata)
+  private static final Metadata DEFAULT_INSTANCE;
+  static {
+    DEFAULT_INSTANCE = new Metadata();
+  }
+
+  public static Metadata getDefaultInstance() {
+    return DEFAULT_INSTANCE;
+  }
+
+  private static final com.google.protobuf.Parser<Metadata>
+      PARSER = new com.google.protobuf.AbstractParser<Metadata>() {
+    @Override
+    public Metadata parsePartialFrom(
+        com.google.protobuf.CodedInputStream input,
+        com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+        throws com.google.protobuf.InvalidProtocolBufferException {
+      return new Metadata(input, extensionRegistry);
+    }
+  };
+
+  public static com.google.protobuf.Parser<Metadata> parser() {
+    return PARSER;
+  }
+
+  @Override
+  public com.google.protobuf.Parser<Metadata> getParserForType() {
+    return PARSER;
+  }
+
+  @Override
+  public Metadata getDefaultInstanceForType() {
+    return DEFAULT_INSTANCE;
+  }
+
+}
+

api/src/main/java/com/alibaba/nacos/api/grpc/auto/MetadataOrBuilder.java

@@ -0,0 +1,76 @@
+/*
+ * Copyright 1999-2020 Alibaba Group Holding Ltd.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * 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.
+ */
+
+package com.alibaba.nacos.api.grpc.auto;
+
+public interface MetadataOrBuilder extends
+    // @@protoc_insertion_point(interface_extends:Metadata)
+    com.google.protobuf.MessageOrBuilder {
+
+  /**
+   * <code>string type = 3;</code>
+   */
+  String getType();
+  /**
+   * <code>string type = 3;</code>
+   */
+  com.google.protobuf.ByteString
+      getTypeBytes();
+
+  /**
+   * <code>string clientIp = 8;</code>
+   */
+  String getClientIp();
+  /**
+   * <code>string clientIp = 8;</code>
+   */
+  com.google.protobuf.ByteString
+      getClientIpBytes();
+
+  /**
+   * <code>map&lt;string, string&gt; headers = 7;</code>
+   */
+  int getHeadersCount();
+  /**
+   * <code>map&lt;string, string&gt; headers = 7;</code>
+   */
+  boolean containsHeaders(
+      String key);
+  /**
+   * Use {@link #getHeadersMap()} instead.
+   */
+  @Deprecated
+  java.util.Map<String, String>
+  getHeaders();
+  /**
+   * <code>map&lt;string, string&gt; headers = 7;</code>
+   */
+  java.util.Map<String, String>
+  getHeadersMap();
+  /**
+   * <code>map&lt;string, string&gt; headers = 7;</code>
+   */
+
+  String getHeadersOrDefault(
+      String key,
+      String defaultValue);
+  /**
+   * <code>map&lt;string, string&gt; headers = 7;</code>
+   */
+
+  String getHeadersOrThrow(
+      String key);
+}

api/src/main/java/com/alibaba/nacos/api/grpc/auto/NacosGrpcService.java

@@ -0,0 +1,97 @@
+/*
+ * Copyright 1999-2020 Alibaba Group Holding Ltd.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * 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.
+ */
+
+package com.alibaba.nacos.api.grpc.auto;
+
+public final class NacosGrpcService {
+  private NacosGrpcService() {}
+  public static void registerAllExtensions(
+      com.google.protobuf.ExtensionRegistryLite registry) {
+  }
+
+  public static void registerAllExtensions(
+      com.google.protobuf.ExtensionRegistry registry) {
+    registerAllExtensions(
+        (com.google.protobuf.ExtensionRegistryLite) registry);
+  }
+  static final com.google.protobuf.Descriptors.Descriptor
+    internal_static_Metadata_descriptor;
+  static final 
+    com.google.protobuf.GeneratedMessageV3.FieldAccessorTable
+      internal_static_Metadata_fieldAccessorTable;
+  static final com.google.protobuf.Descriptors.Descriptor
+    internal_static_Metadata_HeadersEntry_descriptor;
+  static final 
+    com.google.protobuf.GeneratedMessageV3.FieldAccessorTable
+      internal_static_Metadata_HeadersEntry_fieldAccessorTable;
+  static final com.google.protobuf.Descriptors.Descriptor
+    internal_static_Payload_descriptor;
+  static final 
+    com.google.protobuf.GeneratedMessageV3.FieldAccessorTable
+      internal_static_Payload_fieldAccessorTable;
+
+  public static com.google.protobuf.Descriptors.FileDescriptor
+      getDescriptor() {
+    return descriptor;
+  }
+  private static  com.google.protobuf.Descriptors.FileDescriptor
+      descriptor;
+  static {
+    String[] descriptorData = {
+      "\n\030nacos_grpc_service.proto\032\031google/proto" +
+      "buf/any.proto\032\037google/protobuf/timestamp" +
+      ".proto\"\203\001\n\010Metadata\022\014\n\004type\030\003 \001(\t\022\020\n\010cli" +
+      "entIp\030\010 \001(\t\022\'\n\007headers\030\007 \003(\0132\026.Metadata." +
+      "HeadersEntry\032.\n\014HeadersEntry\022\013\n\003key\030\001 \001(" +
+      "\t\022\r\n\005value\030\002 \001(\t:\0028\001\"J\n\007Payload\022\033\n\010metad" +
+      "ata\030\002 \001(\0132\t.Metadata\022\"\n\004body\030\003 \001(\0132\024.goo" +
+      "gle.protobuf.Any28\n\rRequestStream\022\'\n\rreq" +
+      "uestStream\022\010.Payload\032\010.Payload\"\0000\0012*\n\007Re" +
+      "quest\022\037\n\007request\022\010.Payload\032\010.Payload\"\0002>" +
+      "\n\017BiRequestStream\022+\n\017requestBiStream\022\010.P" +
+      "ayload\032\010.Payload\"\000(\0010\001B#\n\037com.alibaba.na" +
+      "cos.api.grpc.autoP\001b\006proto3"
+    };
+    descriptor = com.google.protobuf.Descriptors.FileDescriptor
+      .internalBuildGeneratedFileFrom(descriptorData,
+        new com.google.protobuf.Descriptors.FileDescriptor[] {
+          com.google.protobuf.AnyProto.getDescriptor(),
+          com.google.protobuf.TimestampProto.getDescriptor(),
+        });
+    internal_static_Metadata_descriptor =
+      getDescriptor().getMessageTypes().get(0);
+    internal_static_Metadata_fieldAccessorTable = new
+      com.google.protobuf.GeneratedMessageV3.FieldAccessorTable(
+        internal_static_Metadata_descriptor,
+        new String[] { "Type", "ClientIp", "Headers", });
+    internal_static_Metadata_HeadersEntry_descriptor =
+      internal_static_Metadata_descriptor.getNestedTypes().get(0);
+    internal_static_Metadata_HeadersEntry_fieldAccessorTable = new
+      com.google.protobuf.GeneratedMessageV3.FieldAccessorTable(
+        internal_static_Metadata_HeadersEntry_descriptor,
+        new String[] { "Key", "Value", });
+    internal_static_Payload_descriptor =
+      getDescriptor().getMessageTypes().get(1);
+    internal_static_Payload_fieldAccessorTable = new
+      com.google.protobuf.GeneratedMessageV3.FieldAccessorTable(
+        internal_static_Payload_descriptor,
+        new String[] { "Metadata", "Body", });
+    com.google.protobuf.AnyProto.getDescriptor();
+    com.google.protobuf.TimestampProto.getDescriptor();
+  }
+
+  // @@protoc_insertion_point(outer_class_scope)
+}

api/src/main/java/com/alibaba/nacos/api/grpc/auto/Payload.java

@@ -0,0 +1,794 @@
+/*
+ * Copyright 1999-2020 Alibaba Group Holding Ltd.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * 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.
+ */
+
+package com.alibaba.nacos.api.grpc.auto;
+
+/**
+ * Protobuf type {@code Payload}
+ */
+public  final class Payload extends
+    com.google.protobuf.GeneratedMessageV3 implements
+    // @@protoc_insertion_point(message_implements:Payload)
+    PayloadOrBuilder {
+private static final long serialVersionUID = 0L;
+  // Use Payload.newBuilder() to construct.
+  private Payload(com.google.protobuf.GeneratedMessageV3.Builder<?> builder) {
+    super(builder);
+  }
+  private Payload() {
+  }
+
+  @Override
+  @SuppressWarnings({"unused"})
+  protected Object newInstance(
+      UnusedPrivateParameter unused) {
+    return new Payload();
+  }
+
+  @Override
+  public final com.google.protobuf.UnknownFieldSet
+  getUnknownFields() {
+    return this.unknownFields;
+  }
+  private Payload(
+      com.google.protobuf.CodedInputStream input,
+      com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    this();
+    if (extensionRegistry == null) {
+      throw new NullPointerException();
+    }
+    com.google.protobuf.UnknownFieldSet.Builder unknownFields =
+        com.google.protobuf.UnknownFieldSet.newBuilder();
+    try {
+      boolean done = false;
+      while (!done) {
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+        switch (tag) {
+          case 0:
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+            break;
+          case 18: {
+            Metadata.Builder subBuilder = null;
+            if (metadata_ != null) {
+              subBuilder = metadata_.toBuilder();
+            }
+            metadata_ = input.readMessage(Metadata.parser(), extensionRegistry);
+            if (subBuilder != null) {
+              subBuilder.mergeFrom(metadata_);
+              metadata_ = subBuilder.buildPartial();
+            }
+
+            break;
+          }
+          case 26: {
+            com.google.protobuf.Any.Builder subBuilder = null;
+            if (body_ != null) {
+              subBuilder = body_.toBuilder();
+            }
+            body_ = input.readMessage(com.google.protobuf.Any.parser(), extensionRegistry);
+            if (subBuilder != null) {
+              subBuilder.mergeFrom(body_);
+              body_ = subBuilder.buildPartial();
+            }
+
+            break;
+          }
+          default: {
+            if (!parseUnknownField(
+                input, unknownFields, extensionRegistry, tag)) {
+              done = true;
+            }
+            break;
+          }
+        }
+      }
+    } catch (com.google.protobuf.InvalidProtocolBufferException e) {
+      throw e.setUnfinishedMessage(this);
+    } catch (java.io.IOException e) {
+      throw new com.google.protobuf.InvalidProtocolBufferException(
+          e).setUnfinishedMessage(this);
+    } finally {
+      this.unknownFields = unknownFields.build();
+      makeExtensionsImmutable();
+    }
+  }
+  public static final com.google.protobuf.Descriptors.Descriptor
+      getDescriptor() {
+    return NacosGrpcService.internal_static_Payload_descriptor;
+  }
+
+  @Override
+  protected FieldAccessorTable
+      internalGetFieldAccessorTable() {
+    return NacosGrpcService.internal_static_Payload_fieldAccessorTable
+        .ensureFieldAccessorsInitialized(
+            Payload.class, Builder.class);
+  }
+
+  public static final int METADATA_FIELD_NUMBER = 2;
+  private Metadata metadata_;
+  /**
+   * <code>.Metadata metadata = 2;</code>
+   */
+  public boolean hasMetadata() {
+    return metadata_ != null;
+  }
+  /**
+   * <code>.Metadata metadata = 2;</code>
+   */
+  public Metadata getMetadata() {
+    return metadata_ == null ? Metadata.getDefaultInstance() : metadata_;
+  }
+  /**
+   * <code>.Metadata metadata = 2;</code>
+   */
+  public MetadataOrBuilder getMetadataOrBuilder() {
+    return getMetadata();
+  }
+
+  public static final int BODY_FIELD_NUMBER = 3;
+  private com.google.protobuf.Any body_;
+  /**
+   * <code>.google.protobuf.Any body = 3;</code>
+   */
+  public boolean hasBody() {
+    return body_ != null;
+  }
+  /**
+   * <code>.google.protobuf.Any body = 3;</code>
+   */
+  public com.google.protobuf.Any getBody() {
+    return body_ == null ? com.google.protobuf.Any.getDefaultInstance() : body_;
+  }
+  /**
+   * <code>.google.protobuf.Any body = 3;</code>
+   */
+  public com.google.protobuf.AnyOrBuilder getBodyOrBuilder() {
+    return getBody();
+  }
+
+  private byte memoizedIsInitialized = -1;
+  @Override
+  public final boolean isInitialized() {
+    byte isInitialized = memoizedIsInitialized;
+    if (isInitialized == 1) return true;
+    if (isInitialized == 0) return false;
+
+    memoizedIsInitialized = 1;
+    return true;
+  }
+
+  @Override
+  public void writeTo(com.google.protobuf.CodedOutputStream output)
+                      throws java.io.IOException {
+    if (metadata_ != null) {
+      output.writeMessage(2, getMetadata());
+    }
+    if (body_ != null) {
+      output.writeMessage(3, getBody());
+    }
+    unknownFields.writeTo(output);
+  }
+
+  @Override
+  public int getSerializedSize() {
+    int size = memoizedSize;
+    if (size != -1) return size;
+
+    size = 0;
+    if (metadata_ != null) {
+      size += com.google.protobuf.CodedOutputStream
+        .computeMessageSize(2, getMetadata());
+    }
+    if (body_ != null) {
+      size += com.google.protobuf.CodedOutputStream
+        .computeMessageSize(3, getBody());
+    }
+    size += unknownFields.getSerializedSize();
+    memoizedSize = size;
+    return size;
+  }
+
+  @Override
+  public boolean equals(final Object obj) {
+    if (obj == this) {
+     return true;
+    }
+    if (!(obj instanceof Payload)) {
+      return super.equals(obj);
+    }
+    Payload other = (Payload) obj;
+
+    if (hasMetadata() != other.hasMetadata()) return false;
+    if (hasMetadata()) {
+      if (!getMetadata()
+          .equals(other.getMetadata())) return false;
+    }
+    if (hasBody() != other.hasBody()) return false;
+    if (hasBody()) {
+      if (!getBody()
+          .equals(other.getBody())) return false;
+    }
+    if (!unknownFields.equals(other.unknownFields)) return false;
+    return true;
+  }
+
+  @Override
+  public int hashCode() {
+    if (memoizedHashCode != 0) {
+      return memoizedHashCode;
+    }
+    int hash = 41;
+    hash = (19 * hash) + getDescriptor().hashCode();
+    if (hasMetadata()) {
+      hash = (37 * hash) + METADATA_FIELD_NUMBER;
+      hash = (53 * hash) + getMetadata().hashCode();
+    }
+    if (hasBody()) {
+      hash = (37 * hash) + BODY_FIELD_NUMBER;
+      hash = (53 * hash) + getBody().hashCode();
+    }
+    hash = (29 * hash) + unknownFields.hashCode();
+    memoizedHashCode = hash;
+    return hash;
+  }
+
+  public static Payload parseFrom(
+      java.nio.ByteBuffer data)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data);
+  }
+  public static Payload parseFrom(
+      java.nio.ByteBuffer data,
+      com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data, extensionRegistry);
+  }
+  public static Payload parseFrom(
+      com.google.protobuf.ByteString data)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data);
+  }
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+      com.google.protobuf.ByteString data,
+      com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data, extensionRegistry);
+  }
+  public static Payload parseFrom(byte[] data)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data);
+  }
+  public static Payload parseFrom(
+      byte[] data,
+      com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data, extensionRegistry);
+  }
+  public static Payload parseFrom(java.io.InputStream input)
+      throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessageV3
+        .parseWithIOException(PARSER, input);
+  }
+  public static Payload parseFrom(
+      java.io.InputStream input,
+      com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessageV3
+        .parseWithIOException(PARSER, input, extensionRegistry);
+  }
+  public static Payload parseDelimitedFrom(java.io.InputStream input)
+      throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessageV3
+        .parseDelimitedWithIOException(PARSER, input);
+  }
+  public static Payload parseDelimitedFrom(
+      java.io.InputStream input,
+      com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessageV3
+        .parseDelimitedWithIOException(PARSER, input, extensionRegistry);
+  }
+  public static Payload parseFrom(
+      com.google.protobuf.CodedInputStream input)
+      throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessageV3
+        .parseWithIOException(PARSER, input);
+  }
+  public static Payload parseFrom(
+      com.google.protobuf.CodedInputStream input,
+      com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessageV3
+        .parseWithIOException(PARSER, input, extensionRegistry);
+  }
+
+  @Override
+  public Builder newBuilderForType() { return newBuilder(); }
+  public static Builder newBuilder() {
+    return DEFAULT_INSTANCE.toBuilder();
+  }
+  public static Builder newBuilder(Payload prototype) {
+    return DEFAULT_INSTANCE.toBuilder().mergeFrom(prototype);
+  }
+  @Override
+  public Builder toBuilder() {
+    return this == DEFAULT_INSTANCE
+        ? new Builder() : new Builder().mergeFrom(this);
+  }
+
+  @Override
+  protected Builder newBuilderForType(
+      BuilderParent parent) {
+    Builder builder = new Builder(parent);
+    return builder;
+  }
+  /**
+   * Protobuf type {@code Payload}
+   */
+  public static final class Builder extends
+      com.google.protobuf.GeneratedMessageV3.Builder<Builder> implements
+      // @@protoc_insertion_point(builder_implements:Payload)
+      PayloadOrBuilder {
+    public static final com.google.protobuf.Descriptors.Descriptor
+        getDescriptor() {
+      return NacosGrpcService.internal_static_Payload_descriptor;
+    }
+
+    @Override
+    protected FieldAccessorTable
+        internalGetFieldAccessorTable() {
+      return NacosGrpcService.internal_static_Payload_fieldAccessorTable
+          .ensureFieldAccessorsInitialized(
+              Payload.class, Builder.class);
+    }
+
+    // Construct using com.alibaba.nacos.api.grpc.auto.Payload.newBuilder()
+    private Builder() {
+      maybeForceBuilderInitialization();
+    }
+
+    private Builder(
+        BuilderParent parent) {
+      super(parent);
+      maybeForceBuilderInitialization();
+    }
+    private void maybeForceBuilderInitialization() {
+      if (com.google.protobuf.GeneratedMessageV3
+              .alwaysUseFieldBuilders) {
+      }
+    }
+    @Override
+    public Builder clear() {
+      super.clear();
+      if (metadataBuilder_ == null) {
+        metadata_ = null;
+      } else {
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+        metadataBuilder_ = null;
+      }
+      if (bodyBuilder_ == null) {
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+      } else {
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+      return this;
+    }
+
+    @Override
+    public com.google.protobuf.Descriptors.Descriptor
+        getDescriptorForType() {
+      return NacosGrpcService.internal_static_Payload_descriptor;
+    }
+
+    @Override
+    public Payload getDefaultInstanceForType() {
+      return Payload.getDefaultInstance();
+    }
+
+    @Override
+    public Payload build() {
+      Payload result = buildPartial();
+      if (!result.isInitialized()) {
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+    @Override
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+      }
+      onBuilt();
+      return result;
+    }
+
+    @Override
+    public Builder clone() {
+      return super.clone();
+    }
+    @Override
+    public Builder setField(
+        com.google.protobuf.Descriptors.FieldDescriptor field,
+        Object value) {
+      return super.setField(field, value);
+    }
+    @Override
+    public Builder clearField(
+        com.google.protobuf.Descriptors.FieldDescriptor field) {
+      return super.clearField(field);
+    }
+    @Override
+    public Builder clearOneof(
+        com.google.protobuf.Descriptors.OneofDescriptor oneof) {
+      return super.clearOneof(oneof);
+    }
+    @Override
+    public Builder setRepeatedField(
+        com.google.protobuf.Descriptors.FieldDescriptor field,
+        int index, Object value) {
+      return super.setRepeatedField(field, index, value);
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+    @Override
+    public Builder addRepeatedField(
+        com.google.protobuf.Descriptors.FieldDescriptor field,
+        Object value) {
+      return super.addRepeatedField(field, value);
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+    @Override
+    public Builder mergeFrom(com.google.protobuf.Message other) {
+      if (other instanceof Payload) {
+        return mergeFrom((Payload)other);
+      } else {
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+
+    public Builder mergeFrom(Payload other) {
+      if (other == Payload.getDefaultInstance()) return this;
+      if (other.hasMetadata()) {
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+      }
+      this.mergeUnknownFields(other.unknownFields);
+      onChanged();
+      return this;
+    }
+
+    @Override
+    public final boolean isInitialized() {
+      return true;
+    }
+
+    @Override
+    public Builder mergeFrom(
+        com.google.protobuf.CodedInputStream input,
+        com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+        throws java.io.IOException {
+      Payload parsedMessage = null;
+      try {
+        parsedMessage = PARSER.parsePartialFrom(input, extensionRegistry);
+      } catch (com.google.protobuf.InvalidProtocolBufferException e) {
+        parsedMessage = (Payload) e.getUnfinishedMessage();
+        throw e.unwrapIOException();
+      } finally {
+        if (parsedMessage != null) {
+          mergeFrom(parsedMessage);
+        }
+      }
+      return this;
+    }
+
+    private Metadata metadata_;
+    private com.google.protobuf.SingleFieldBuilderV3<
+        Metadata, Metadata.Builder, MetadataOrBuilder> metadataBuilder_;
+    /**
+     * <code>.Metadata metadata = 2;</code>
+     */
+    public boolean hasMetadata() {
+      return metadataBuilder_ != null || metadata_ != null;
+    }
+    /**
+     * <code>.Metadata metadata = 2;</code>
+     */
+    public Metadata getMetadata() {
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+    /**
+     * <code>.Metadata metadata = 2;</code>
+     */
+    public Builder setMetadata(Metadata value) {
+      if (metadataBuilder_ == null) {
+        if (value == null) {
+          throw new NullPointerException();
+        }
+        metadata_ = value;
+        onChanged();
+      } else {
+        metadataBuilder_.setMessage(value);
+      }
+
+      return this;
+    }
+    /**
+     * <code>.Metadata metadata = 2;</code>
+     */
+    public Builder setMetadata(
+        Metadata.Builder builderForValue) {
+      if (metadataBuilder_ == null) {
+        metadata_ = builderForValue.build();
+        onChanged();
+      } else {
+        metadataBuilder_.setMessage(builderForValue.build());
+      }
+
+      return this;
+    }
+    /**
+     * <code>.Metadata metadata = 2;</code>
+     */
+    public Builder mergeMetadata(Metadata value) {
+      if (metadataBuilder_ == null) {
+        if (metadata_ != null) {
+          metadata_ =
+            Metadata.newBuilder(metadata_).mergeFrom(value).buildPartial();
+        } else {
+          metadata_ = value;
+        }
+        onChanged();
+      } else {
+        metadataBuilder_.mergeFrom(value);
+      }
+
+      return this;
+    }
+    /**
+     * <code>.Metadata metadata = 2;</code>
+     */
+    public Builder clearMetadata() {
+      if (metadataBuilder_ == null) {
+        metadata_ = null;
+        onChanged();
+      } else {
+        metadata_ = null;
+        metadataBuilder_ = null;
+      }
+
+      return this;
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+    /**
+     * <code>.Metadata metadata = 2;</code>
+     */
+    public Metadata.Builder getMetadataBuilder() {
+      
+      onChanged();
+      return getMetadataFieldBuilder().getBuilder();
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+    /**
+     * <code>.Metadata metadata = 2;</code>
+     */
+    public MetadataOrBuilder getMetadataOrBuilder() {
+      if (metadataBuilder_ != null) {
+        return metadataBuilder_.getMessageOrBuilder();
+      } else {
+        return metadata_ == null ?
+            Metadata.getDefaultInstance() : metadata_;
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+    /**
+     * <code>.Metadata metadata = 2;</code>
+     */
+    private com.google.protobuf.SingleFieldBuilderV3<
+        Metadata, Metadata.Builder, MetadataOrBuilder>
+        getMetadataFieldBuilder() {
+      if (metadataBuilder_ == null) {
+        metadataBuilder_ = new com.google.protobuf.SingleFieldBuilderV3<
+            Metadata, Metadata.Builder, MetadataOrBuilder>(
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+                isClean());
+        metadata_ = null;
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+      return metadataBuilder_;
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+
+    private com.google.protobuf.Any body_;
+    private com.google.protobuf.SingleFieldBuilderV3<
+        com.google.protobuf.Any, com.google.protobuf.Any.Builder, com.google.protobuf.AnyOrBuilder> bodyBuilder_;
+    /**
+     * <code>.google.protobuf.Any body = 3;</code>
+     */
+    public boolean hasBody() {
+      return bodyBuilder_ != null || body_ != null;
+    }
+    /**
+     * <code>.google.protobuf.Any body = 3;</code>
+     */
+    public com.google.protobuf.Any getBody() {
+      if (bodyBuilder_ == null) {
+        return body_ == null ? com.google.protobuf.Any.getDefaultInstance() : body_;
+      } else {
+        return bodyBuilder_.getMessage();
+      }
+    }
+    /**
+     * <code>.google.protobuf.Any body = 3;</code>
+     */
+    public Builder setBody(com.google.protobuf.Any value) {
+      if (bodyBuilder_ == null) {
+        if (value == null) {
+          throw new NullPointerException();
+        }
+        body_ = value;
+        onChanged();
+      } else {
+        bodyBuilder_.setMessage(value);
+      }
+
+      return this;
+    }
+    /**
+     * <code>.google.protobuf.Any body = 3;</code>
+     */
+    public Builder setBody(
+        com.google.protobuf.Any.Builder builderForValue) {
+      if (bodyBuilder_ == null) {
+        body_ = builderForValue.build();
+        onChanged();
+      } else {
+        bodyBuilder_.setMessage(builderForValue.build());
+      }
+
+      return this;
+    }
+    /**
+     * <code>.google.protobuf.Any body = 3;</code>
+     */
+    public Builder mergeBody(com.google.protobuf.Any value) {
+      if (bodyBuilder_ == null) {
+        if (body_ != null) {
+          body_ =
+            com.google.protobuf.Any.newBuilder(body_).mergeFrom(value).buildPartial();
+        } else {
+          body_ = value;
+        }
+        onChanged();
+      } else {
+        bodyBuilder_.mergeFrom(value);
+      }
+
+      return this;
+    }
+    /**
+     * <code>.google.protobuf.Any body = 3;</code>
+     */
+    public Builder clearBody() {
+      if (bodyBuilder_ == null) {
+        body_ = null;
+        onChanged();
+      } else {
+        body_ = null;
+        bodyBuilder_ = null;
+      }
+
+      return this;
+    }
+    /**
+     * <code>.google.protobuf.Any body = 3;</code>
+     */
+    public com.google.protobuf.Any.Builder getBodyBuilder() {
+      
+      onChanged();
+      return getBodyFieldBuilder().getBuilder();
+    }
+    /**
+     * <code>.google.protobuf.Any body = 3;</code>
+     */
+    public com.google.protobuf.AnyOrBuilder getBodyOrBuilder() {
+      if (bodyBuilder_ != null) {
+        return bodyBuilder_.getMessageOrBuilder();
+      } else {
+        return body_ == null ?
+            com.google.protobuf.Any.getDefaultInstance() : body_;
+      }
+    }
+    /**
+     * <code>.google.protobuf.Any body = 3;</code>
+     */
+    private com.google.protobuf.SingleFieldBuilderV3<
+        com.google.protobuf.Any, com.google.protobuf.Any.Builder, com.google.protobuf.AnyOrBuilder> 
+        getBodyFieldBuilder() {
+      if (bodyBuilder_ == null) {
+        bodyBuilder_ = new com.google.protobuf.SingleFieldBuilderV3<
+            com.google.protobuf.Any, com.google.protobuf.Any.Builder, com.google.protobuf.AnyOrBuilder>(
+                getBody(),
+                getParentForChildren(),
+                isClean());
+        body_ = null;
+      }
+      return bodyBuilder_;
+    }
+    @Override
+    public final Builder setUnknownFields(
+        final com.google.protobuf.UnknownFieldSet unknownFields) {
+      return super.setUnknownFields(unknownFields);
+    }
+
+    @Override
+    public final Builder mergeUnknownFields(
+        final com.google.protobuf.UnknownFieldSet unknownFields) {
+      return super.mergeUnknownFields(unknownFields);
+    }
+
+
+    // @@protoc_insertion_point(builder_scope:Payload)
+  }
+
+  // @@protoc_insertion_point(class_scope:Payload)
+  private static final Payload DEFAULT_INSTANCE;
+  static {
+    DEFAULT_INSTANCE = new Payload();
+  }
+
+  public static Payload getDefaultInstance() {
+    return DEFAULT_INSTANCE;
+  }
+
+  private static final com.google.protobuf.Parser<Payload>
+      PARSER = new com.google.protobuf.AbstractParser<Payload>() {
+    @Override
+    public Payload parsePartialFrom(
+        com.google.protobuf.CodedInputStream input,
+        com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+        throws com.google.protobuf.InvalidProtocolBufferException {
+      return new Payload(input, extensionRegistry);
+    }
+  };
+
+  public static com.google.protobuf.Parser<Payload> parser() {
+    return PARSER;
+  }
+
+  @Override
+  public com.google.protobuf.Parser<Payload> getParserForType() {
+    return PARSER;
+  }
+
+  @Override
+  public Payload getDefaultInstanceForType() {
+    return DEFAULT_INSTANCE;
+  }
+
+}
+

api/src/main/java/com/alibaba/nacos/api/grpc/auto/PayloadOrBuilder.java

@@ -0,0 +1,48 @@
+/*
+ * Copyright 1999-2020 Alibaba Group Holding Ltd.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * 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.
+ */
+
+package com.alibaba.nacos.api.grpc.auto;
+
+public interface PayloadOrBuilder extends
+    // @@protoc_insertion_point(interface_extends:Payload)
+    com.google.protobuf.MessageOrBuilder {
+
+  /**
+   * <code>.Metadata metadata = 2;</code>
+   */
+  boolean hasMetadata();
+  /**
+   * <code>.Metadata metadata = 2;</code>
+   */
+  Metadata getMetadata();
+  /**
+   * <code>.Metadata metadata = 2;</code>
+   */
+  MetadataOrBuilder getMetadataOrBuilder();
+
+  /**
+   * <code>.google.protobuf.Any body = 3;</code>
+   */
+  boolean hasBody();
+  /**
+   * <code>.google.protobuf.Any body = 3;</code>
+   */
+  com.google.protobuf.Any getBody();
+  /**
+   * <code>.google.protobuf.Any body = 3;</code>
+   */
+  com.google.protobuf.AnyOrBuilder getBodyOrBuilder();
+}

api/src/main/java/com/alibaba/nacos/api/grpc/auto/RequestGrpc.java

@@ -0,0 +1,308 @@
+/*
+ * Copyright 1999-2020 Alibaba Group Holding Ltd.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * 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.
+ */
+
+package com.alibaba.nacos.api.grpc.auto;
+
+import static io.grpc.MethodDescriptor.generateFullMethodName;
+import static io.grpc.stub.ClientCalls.asyncBidiStreamingCall;
+import static io.grpc.stub.ClientCalls.asyncClientStreamingCall;
+import static io.grpc.stub.ClientCalls.asyncServerStreamingCall;
+import static io.grpc.stub.ClientCalls.asyncUnaryCall;
+import static io.grpc.stub.ClientCalls.blockingServerStreamingCall;
+import static io.grpc.stub.ClientCalls.blockingUnaryCall;
+import static io.grpc.stub.ClientCalls.futureUnaryCall;
+import static io.grpc.stub.ServerCalls.asyncBidiStreamingCall;
+import static io.grpc.stub.ServerCalls.asyncClientStreamingCall;
+import static io.grpc.stub.ServerCalls.asyncServerStreamingCall;
+import static io.grpc.stub.ServerCalls.asyncUnaryCall;
+import static io.grpc.stub.ServerCalls.asyncUnimplementedStreamingCall;
+import static io.grpc.stub.ServerCalls.asyncUnimplementedUnaryCall;
+
+/**
+ */
+@javax.annotation.Generated(
+    value = "by gRPC proto compiler (version 1.14.0)",
+    comments = "Source: nacos_grpc_service.proto")
+public final class RequestGrpc {
+
+  private RequestGrpc() {}
+
+  public static final String SERVICE_NAME = "Request";
+
+  // Static method descriptors that strictly reflect the proto.
+  private static volatile io.grpc.MethodDescriptor<com.alibaba.nacos.api.grpc.auto.Payload,
+      com.alibaba.nacos.api.grpc.auto.Payload> getRequestMethod;
+
+  @io.grpc.stub.annotations.RpcMethod(
+      fullMethodName = SERVICE_NAME + '/' + "request",
+      requestType = com.alibaba.nacos.api.grpc.auto.Payload.class,
+      responseType = com.alibaba.nacos.api.grpc.auto.Payload.class,
+      methodType = io.grpc.MethodDescriptor.MethodType.UNARY)
+  public static io.grpc.MethodDescriptor<com.alibaba.nacos.api.grpc.auto.Payload,
+      com.alibaba.nacos.api.grpc.auto.Payload> getRequestMethod() {
+    io.grpc.MethodDescriptor<com.alibaba.nacos.api.grpc.auto.Payload, com.alibaba.nacos.api.grpc.auto.Payload> getRequestMethod;
+    if ((getRequestMethod = RequestGrpc.getRequestMethod) == null) {
+      synchronized (RequestGrpc.class) {
+        if ((getRequestMethod = RequestGrpc.getRequestMethod) == null) {
+          RequestGrpc.getRequestMethod = getRequestMethod = 
+              io.grpc.MethodDescriptor.<com.alibaba.nacos.api.grpc.auto.Payload, com.alibaba.nacos.api.grpc.auto.Payload>newBuilder()
+              .setType(io.grpc.MethodDescriptor.MethodType.UNARY)
+              .setFullMethodName(generateFullMethodName(
+                  "Request", "request"))
+              .setSampledToLocalTracing(true)
+              .setRequestMarshaller(io.grpc.protobuf.ProtoUtils.marshaller(
+                  com.alibaba.nacos.api.grpc.auto.Payload.getDefaultInstance()))
+              .setResponseMarshaller(io.grpc.protobuf.ProtoUtils.marshaller(
+                  com.alibaba.nacos.api.grpc.auto.Payload.getDefaultInstance()))
+                  .setSchemaDescriptor(new RequestMethodDescriptorSupplier("request"))
+                  .build();
+          }
+        }
+     }
+     return getRequestMethod;
+  }
+
+  /**
+   * Creates a new async stub that supports all call types for the service
+   */
+  public static RequestStub newStub(io.grpc.Channel channel) {
+    return new RequestStub(channel);
+  }
+
+  /**
+   * Creates a new blocking-style stub that supports unary and streaming output calls on the service
+   */
+  public static RequestBlockingStub newBlockingStub(
+      io.grpc.Channel channel) {
+    return new RequestBlockingStub(channel);
+  }
+
+  /**
+   * Creates a new ListenableFuture-style stub that supports unary calls on the service
+   */
+  public static RequestFutureStub newFutureStub(
+      io.grpc.Channel channel) {
+    return new RequestFutureStub(channel);
+  }
+
+  /**
+   */
+  public static abstract class RequestImplBase implements io.grpc.BindableService {
+
+    /**
+     * <pre>
+     * Sends a commonRequest
+     * </pre>
+     */
+    public void request(com.alibaba.nacos.api.grpc.auto.Payload request,
+        io.grpc.stub.StreamObserver<com.alibaba.nacos.api.grpc.auto.Payload> responseObserver) {
+      asyncUnimplementedUnaryCall(getRequestMethod(), responseObserver);
+    }
+
+    @Override public final io.grpc.ServerServiceDefinition bindService() {
+      return io.grpc.ServerServiceDefinition.builder(getServiceDescriptor())
+          .addMethod(
+            getRequestMethod(),
+            asyncUnaryCall(
+              new MethodHandlers<
+                com.alibaba.nacos.api.grpc.auto.Payload,
+                com.alibaba.nacos.api.grpc.auto.Payload>(
+                  this, METHODID_REQUEST)))
+          .build();
+    }
+  }
+
+  /**
+   */
+  public static final class RequestStub extends io.grpc.stub.AbstractStub<RequestStub> {
+    private RequestStub(io.grpc.Channel channel) {
+      super(channel);
+    }
+
+    private RequestStub(io.grpc.Channel channel,
+        io.grpc.CallOptions callOptions) {
+      super(channel, callOptions);
+    }
+
+    @Override
+    protected RequestStub build(io.grpc.Channel channel,
+        io.grpc.CallOptions callOptions) {
+      return new RequestStub(channel, callOptions);
+    }
+
+    /**
+     * <pre>
+     * Sends a commonRequest
+     * </pre>
+     */
+    public void request(com.alibaba.nacos.api.grpc.auto.Payload request,
+        io.grpc.stub.StreamObserver<com.alibaba.nacos.api.grpc.auto.Payload> responseObserver) {
+      asyncUnaryCall(
+          getChannel().newCall(getRequestMethod(), getCallOptions()), request, responseObserver);
+    }
+  }
+
+  /**
+   */
+  public static final class RequestBlockingStub extends io.grpc.stub.AbstractStub<RequestBlockingStub> {
+    private RequestBlockingStub(io.grpc.Channel channel) {
+      super(channel);
+    }
+
+    private RequestBlockingStub(io.grpc.Channel channel,
+        io.grpc.CallOptions callOptions) {
+      super(channel, callOptions);
+    }
+
+    @Override
+    protected RequestBlockingStub build(io.grpc.Channel channel,
+        io.grpc.CallOptions callOptions) {
+      return new RequestBlockingStub(channel, callOptions);
+    }
+
+    /**
+     * <pre>
+     * Sends a commonRequest
+     * </pre>
+     */
+    public com.alibaba.nacos.api.grpc.auto.Payload request(com.alibaba.nacos.api.grpc.auto.Payload request) {
+      return blockingUnaryCall(
+          getChannel(), getRequestMethod(), getCallOptions(), request);
+    }
+  }
+
+  /**
+   */
+  public static final class RequestFutureStub extends io.grpc.stub.AbstractStub<RequestFutureStub> {
+    private RequestFutureStub(io.grpc.Channel channel) {
+      super(channel);
+    }
+
+    private RequestFutureStub(io.grpc.Channel channel,
+        io.grpc.CallOptions callOptions) {
+      super(channel, callOptions);
+    }
+
+    @Override
+    protected RequestFutureStub build(io.grpc.Channel channel,
+        io.grpc.CallOptions callOptions) {
+      return new RequestFutureStub(channel, callOptions);
+    }
+
+    /**
+     * <pre>
+     * Sends a commonRequest
+     * </pre>
+     */
+    public com.google.common.util.concurrent.ListenableFuture<com.alibaba.nacos.api.grpc.auto.Payload> request(
+        com.alibaba.nacos.api.grpc.auto.Payload request) {
+      return futureUnaryCall(
+          getChannel().newCall(getRequestMethod(), getCallOptions()), request);
+    }
+  }
+
+  private static final int METHODID_REQUEST = 0;
+
+  private static final class MethodHandlers<Req, Resp> implements
+      io.grpc.stub.ServerCalls.UnaryMethod<Req, Resp>,
+      io.grpc.stub.ServerCalls.ServerStreamingMethod<Req, Resp>,
+      io.grpc.stub.ServerCalls.ClientStreamingMethod<Req, Resp>,
+      io.grpc.stub.ServerCalls.BidiStreamingMethod<Req, Resp> {
+    private final RequestImplBase serviceImpl;
+    private final int methodId;
+
+    MethodHandlers(RequestImplBase serviceImpl, int methodId) {
+      this.serviceImpl = serviceImpl;
+      this.methodId = methodId;
+    }
+
+    @Override
+    @SuppressWarnings("unchecked")
+    public void invoke(Req request, io.grpc.stub.StreamObserver<Resp> responseObserver) {
+      switch (methodId) {
+        case METHODID_REQUEST:
+          serviceImpl.request((com.alibaba.nacos.api.grpc.auto.Payload) request,
+              (io.grpc.stub.StreamObserver<com.alibaba.nacos.api.grpc.auto.Payload>) responseObserver);
+          break;
+        default:
+          throw new AssertionError();
+      }
+    }
+
+    @Override
+    @SuppressWarnings("unchecked")
+    public io.grpc.stub.StreamObserver<Req> invoke(
+        io.grpc.stub.StreamObserver<Resp> responseObserver) {
+      switch (methodId) {
+        default:
+          throw new AssertionError();
+      }
+    }
+  }
+
+  private static abstract class RequestBaseDescriptorSupplier
+      implements io.grpc.protobuf.ProtoFileDescriptorSupplier, io.grpc.protobuf.ProtoServiceDescriptorSupplier {
+    RequestBaseDescriptorSupplier() {}
+
+    @Override
+    public com.google.protobuf.Descriptors.FileDescriptor getFileDescriptor() {
+      return com.alibaba.nacos.api.grpc.auto.NacosGrpcService.getDescriptor();
+    }
+
+    @Override
+    public com.google.protobuf.Descriptors.ServiceDescriptor getServiceDescriptor() {
+      return getFileDescriptor().findServiceByName("Request");
+    }
+  }
+
+  private static final class RequestFileDescriptorSupplier
+      extends RequestBaseDescriptorSupplier {
+    RequestFileDescriptorSupplier() {}
+  }
+
+  private static final class RequestMethodDescriptorSupplier
+      extends RequestBaseDescriptorSupplier
+      implements io.grpc.protobuf.ProtoMethodDescriptorSupplier {
+    private final String methodName;
+
+    RequestMethodDescriptorSupplier(String methodName) {
+      this.methodName = methodName;
+    }
+
+    @Override
+    public com.google.protobuf.Descriptors.MethodDescriptor getMethodDescriptor() {
+      return getServiceDescriptor().findMethodByName(methodName);
+    }
+  }
+
+  private static volatile io.grpc.ServiceDescriptor serviceDescriptor;
+
+  public static io.grpc.ServiceDescriptor getServiceDescriptor() {
+    io.grpc.ServiceDescriptor result = serviceDescriptor;
+    if (result == null) {
+      synchronized (RequestGrpc.class) {
+        result = serviceDescriptor;
+        if (result == null) {
+          serviceDescriptor = result = io.grpc.ServiceDescriptor.newBuilder(SERVICE_NAME)
+              .setSchemaDescriptor(new RequestFileDescriptorSupplier())
+              .addMethod(getRequestMethod())
+              .build();
+        }
+      }
+    }
+    return result;
+  }
+}

api/src/main/java/com/alibaba/nacos/api/grpc/auto/RequestStreamGrpc.java

@@ -0,0 +1,298 @@
+/*
+ * Copyright 1999-2020 Alibaba Group Holding Ltd.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * 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.
+ */
+
+package com.alibaba.nacos.api.grpc.auto;
+
+import static io.grpc.MethodDescriptor.generateFullMethodName;
+import static io.grpc.stub.ClientCalls.asyncBidiStreamingCall;
+import static io.grpc.stub.ClientCalls.asyncClientStreamingCall;
+import static io.grpc.stub.ClientCalls.asyncServerStreamingCall;
+import static io.grpc.stub.ClientCalls.asyncUnaryCall;
+import static io.grpc.stub.ClientCalls.blockingServerStreamingCall;
+import static io.grpc.stub.ClientCalls.blockingUnaryCall;
+import static io.grpc.stub.ClientCalls.futureUnaryCall;
+import static io.grpc.stub.ServerCalls.asyncBidiStreamingCall;
+import static io.grpc.stub.ServerCalls.asyncClientStreamingCall;
+import static io.grpc.stub.ServerCalls.asyncServerStreamingCall;
+import static io.grpc.stub.ServerCalls.asyncUnaryCall;
+import static io.grpc.stub.ServerCalls.asyncUnimplementedStreamingCall;
+import static io.grpc.stub.ServerCalls.asyncUnimplementedUnaryCall;
+
+/**
+ */
+@javax.annotation.Generated(
+    value = "by gRPC proto compiler (version 1.14.0)",
+    comments = "Source: nacos_grpc_service.proto")
+public final class RequestStreamGrpc {
+
+  private RequestStreamGrpc() {}
+
+  public static final String SERVICE_NAME = "RequestStream";
+
+  // Static method descriptors that strictly reflect the proto.
+  private static volatile io.grpc.MethodDescriptor<com.alibaba.nacos.api.grpc.auto.Payload,
+      com.alibaba.nacos.api.grpc.auto.Payload> getRequestStreamMethod;
+
+  @io.grpc.stub.annotations.RpcMethod(
+      fullMethodName = SERVICE_NAME + '/' + "requestStream",
+      requestType = com.alibaba.nacos.api.grpc.auto.Payload.class,
+      responseType = com.alibaba.nacos.api.grpc.auto.Payload.class,
+      methodType = io.grpc.MethodDescriptor.MethodType.SERVER_STREAMING)
+  public static io.grpc.MethodDescriptor<com.alibaba.nacos.api.grpc.auto.Payload,
+      com.alibaba.nacos.api.grpc.auto.Payload> getRequestStreamMethod() {
+    io.grpc.MethodDescriptor<com.alibaba.nacos.api.grpc.auto.Payload, com.alibaba.nacos.api.grpc.auto.Payload> getRequestStreamMethod;
+    if ((getRequestStreamMethod = RequestStreamGrpc.getRequestStreamMethod) == null) {
+      synchronized (RequestStreamGrpc.class) {
+        if ((getRequestStreamMethod = RequestStreamGrpc.getRequestStreamMethod) == null) {
+          RequestStreamGrpc.getRequestStreamMethod = getRequestStreamMethod = 
+              io.grpc.MethodDescriptor.<com.alibaba.nacos.api.grpc.auto.Payload, com.alibaba.nacos.api.grpc.auto.Payload>newBuilder()
+              .setType(io.grpc.MethodDescriptor.MethodType.SERVER_STREAMING)
+              .setFullMethodName(generateFullMethodName(
+                  "RequestStream", "requestStream"))
+              .setSampledToLocalTracing(true)
+              .setRequestMarshaller(io.grpc.protobuf.ProtoUtils.marshaller(
+                  com.alibaba.nacos.api.grpc.auto.Payload.getDefaultInstance()))
+              .setResponseMarshaller(io.grpc.protobuf.ProtoUtils.marshaller(
+                  com.alibaba.nacos.api.grpc.auto.Payload.getDefaultInstance()))
+                  .setSchemaDescriptor(new RequestStreamMethodDescriptorSupplier("requestStream"))
+                  .build();
+          }
+        }
+     }
+     return getRequestStreamMethod;
+  }
+
+  /**
+   * Creates a new async stub that supports all call types for the service
+   */
+  public static RequestStreamStub newStub(io.grpc.Channel channel) {
+    return new RequestStreamStub(channel);
+  }
+
+  /**
+   * Creates a new blocking-style stub that supports unary and streaming output calls on the service
+   */
+  public static RequestStreamBlockingStub newBlockingStub(
+      io.grpc.Channel channel) {
+    return new RequestStreamBlockingStub(channel);
+  }
+
+  /**
+   * Creates a new ListenableFuture-style stub that supports unary calls on the service
+   */
+  public static RequestStreamFutureStub newFutureStub(
+      io.grpc.Channel channel) {
+    return new RequestStreamFutureStub(channel);
+  }
+
+  /**
+   */
+  public static abstract class RequestStreamImplBase implements io.grpc.BindableService {
+
+    /**
+     * <pre>
+     * build a streamRequest
+     * </pre>
+     */
+    public void requestStream(com.alibaba.nacos.api.grpc.auto.Payload request,
+        io.grpc.stub.StreamObserver<com.alibaba.nacos.api.grpc.auto.Payload> responseObserver) {
+      asyncUnimplementedUnaryCall(getRequestStreamMethod(), responseObserver);
+    }
+
+    @Override public final io.grpc.ServerServiceDefinition bindService() {
+      return io.grpc.ServerServiceDefinition.builder(getServiceDescriptor())
+          .addMethod(
+            getRequestStreamMethod(),
+            asyncServerStreamingCall(
+              new MethodHandlers<
+                com.alibaba.nacos.api.grpc.auto.Payload,
+                com.alibaba.nacos.api.grpc.auto.Payload>(
+                  this, METHODID_REQUEST_STREAM)))
+          .build();
+    }
+  }
+
+  /**
+   */
+  public static final class RequestStreamStub extends io.grpc.stub.AbstractStub<RequestStreamStub> {
+    private RequestStreamStub(io.grpc.Channel channel) {
+      super(channel);
+    }
+
+    private RequestStreamStub(io.grpc.Channel channel,
+        io.grpc.CallOptions callOptions) {
+      super(channel, callOptions);
+    }
+
+    @Override
+    protected RequestStreamStub build(io.grpc.Channel channel,
+        io.grpc.CallOptions callOptions) {
+      return new RequestStreamStub(channel, callOptions);
+    }
+
+    /**
+     * <pre>
+     * build a streamRequest
+     * </pre>
+     */
+    public void requestStream(com.alibaba.nacos.api.grpc.auto.Payload request,
+        io.grpc.stub.StreamObserver<com.alibaba.nacos.api.grpc.auto.Payload> responseObserver) {
+      asyncServerStreamingCall(
+          getChannel().newCall(getRequestStreamMethod(), getCallOptions()), request, responseObserver);
+    }
+  }
+
+  /**
+   */
+  public static final class RequestStreamBlockingStub extends io.grpc.stub.AbstractStub<RequestStreamBlockingStub> {
+    private RequestStreamBlockingStub(io.grpc.Channel channel) {
+      super(channel);
+    }
+
+    private RequestStreamBlockingStub(io.grpc.Channel channel,
+        io.grpc.CallOptions callOptions) {
+      super(channel, callOptions);
+    }
+
+    @Override
+    protected RequestStreamBlockingStub build(io.grpc.Channel channel,
+        io.grpc.CallOptions callOptions) {
+      return new RequestStreamBlockingStub(channel, callOptions);
+    }
+
+    /**
+     * <pre>
+     * build a streamRequest
+     * </pre>
+     */
+    public java.util.Iterator<com.alibaba.nacos.api.grpc.auto.Payload> requestStream(
+        com.alibaba.nacos.api.grpc.auto.Payload request) {
+      return blockingServerStreamingCall(
+          getChannel(), getRequestStreamMethod(), getCallOptions(), request);
+    }
+  }
+
+  /**
+   */
+  public static final class RequestStreamFutureStub extends io.grpc.stub.AbstractStub<RequestStreamFutureStub> {
+    private RequestStreamFutureStub(io.grpc.Channel channel) {
+      super(channel);
+    }
+
+    private RequestStreamFutureStub(io.grpc.Channel channel,
+        io.grpc.CallOptions callOptions) {
+      super(channel, callOptions);
+    }
+
+    @Override
+    protected RequestStreamFutureStub build(io.grpc.Channel channel,
+        io.grpc.CallOptions callOptions) {
+      return new RequestStreamFutureStub(channel, callOptions);
+    }
+  }
+
+  private static final int METHODID_REQUEST_STREAM = 0;
+
+  private static final class MethodHandlers<Req, Resp> implements
+      io.grpc.stub.ServerCalls.UnaryMethod<Req, Resp>,
+      io.grpc.stub.ServerCalls.ServerStreamingMethod<Req, Resp>,
+      io.grpc.stub.ServerCalls.ClientStreamingMethod<Req, Resp>,
+      io.grpc.stub.ServerCalls.BidiStreamingMethod<Req, Resp> {
+    private final RequestStreamImplBase serviceImpl;
+    private final int methodId;
+
+    MethodHandlers(RequestStreamImplBase serviceImpl, int methodId) {
+      this.serviceImpl = serviceImpl;
+      this.methodId = methodId;
+    }
+
+    @Override
+    @SuppressWarnings("unchecked")
+    public void invoke(Req request, io.grpc.stub.StreamObserver<Resp> responseObserver) {
+      switch (methodId) {
+        case METHODID_REQUEST_STREAM:
+          serviceImpl.requestStream((com.alibaba.nacos.api.grpc.auto.Payload) request,
+              (io.grpc.stub.StreamObserver<com.alibaba.nacos.api.grpc.auto.Payload>) responseObserver);
+          break;
+        default:
+          throw new AssertionError();
+      }
+    }
+
+    @Override
+    @SuppressWarnings("unchecked")
+    public io.grpc.stub.StreamObserver<Req> invoke(
+        io.grpc.stub.StreamObserver<Resp> responseObserver) {
+      switch (methodId) {
+        default:
+          throw new AssertionError();
+      }
+    }
+  }
+
+  private static abstract class RequestStreamBaseDescriptorSupplier
+      implements io.grpc.protobuf.ProtoFileDescriptorSupplier, io.grpc.protobuf.ProtoServiceDescriptorSupplier {
+    RequestStreamBaseDescriptorSupplier() {}
+
+    @Override
+    public com.google.protobuf.Descriptors.FileDescriptor getFileDescriptor() {
+      return com.alibaba.nacos.api.grpc.auto.NacosGrpcService.getDescriptor();
+    }
+
+    @Override
+    public com.google.protobuf.Descriptors.ServiceDescriptor getServiceDescriptor() {
+      return getFileDescriptor().findServiceByName("RequestStream");
+    }
+  }
+
+  private static final class RequestStreamFileDescriptorSupplier
+      extends RequestStreamBaseDescriptorSupplier {
+    RequestStreamFileDescriptorSupplier() {}
+  }
+
+  private static final class RequestStreamMethodDescriptorSupplier
+      extends RequestStreamBaseDescriptorSupplier
+      implements io.grpc.protobuf.ProtoMethodDescriptorSupplier {
+    private final String methodName;
+
+    RequestStreamMethodDescriptorSupplier(String methodName) {
+      this.methodName = methodName;
+    }
+
+    @Override
+    public com.google.protobuf.Descriptors.MethodDescriptor getMethodDescriptor() {
+      return getServiceDescriptor().findMethodByName(methodName);
+    }
+  }
+
+  private static volatile io.grpc.ServiceDescriptor serviceDescriptor;
+
+  public static io.grpc.ServiceDescriptor getServiceDescriptor() {
+    io.grpc.ServiceDescriptor result = serviceDescriptor;
+    if (result == null) {
+      synchronized (RequestStreamGrpc.class) {
+        result = serviceDescriptor;
+        if (result == null) {
+          serviceDescriptor = result = io.grpc.ServiceDescriptor.newBuilder(SERVICE_NAME)
+              .setSchemaDescriptor(new RequestStreamFileDescriptorSupplier())
+              .addMethod(getRequestStreamMethod())
+              .build();
+        }
+      }
+    }
+    return result;
+  }
+}

api/src/main/java/com/alibaba/nacos/api/naming/ClientNamingAbility.java

@@ -0,0 +1,46 @@
+/*
+ * Copyright 1999-2018 Alibaba Group Holding Ltd.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * 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.
+ */
+
+package com.alibaba.nacos.api.naming;
+
+/**
+ * naming abilities of nacos client.
+ *
+ * @author liuzunfei
+ * @version $Id: ClientNamingAbility.java, v 0.1 2021年01月24日 00:09 AM liuzunfei Exp $
+ */
+public class ClientNamingAbility {
+    
+    private boolean supportDeltaPush;
+    
+    private boolean supportRemoteMetric;
+    
+    public boolean isSupportDeltaPush() {
+        return supportDeltaPush;
+    }
+    
+    public void setSupportDeltaPush(boolean supportDeltaPush) {
+        this.supportDeltaPush = supportDeltaPush;
+    }
+    
+    public boolean isSupportRemoteMetric() {
+        return supportRemoteMetric;
+    }
+    
+    public void setSupportRemoteMetric(boolean supportRemoteMetric) {
+        this.supportRemoteMetric = supportRemoteMetric;
+    }
+}

api/src/main/java/com/alibaba/nacos/api/naming/CommonParams.java

@@ -35,4 +35,6 @@ public class CommonParams {
     public static final String GROUP_NAME = "groupName";
     
     public static final String LIGHT_BEAT_ENABLED = "lightBeatEnabled";
+    
+    public static final String NAMING_REQUEST_TIMEOUT = "namingRequestTimeout";
 }

api/src/main/java/com/alibaba/nacos/api/naming/NamingResponseCode.java

@@ -33,4 +33,9 @@ public class NamingResponseCode extends ResponseCode {
      */
     public static final int RESOURCE_NOT_FOUND = 20404;
     
+    /**
+     * Stop or no need to retry.
+     */
+    public static final int NO_NEED_RETRY = 21600;
+    
 }

api/src/main/java/com/alibaba/nacos/api/naming/ServerNamingAbility.java

@@ -0,0 +1,61 @@
+/*
+ * Copyright 1999-2018 Alibaba Group Holding Ltd.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * 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.
+ */
+
+package com.alibaba.nacos.api.naming;
+
+import java.io.Serializable;
+import java.util.Objects;
+
+/**
+ * naming abilities of nacos server.
+ *
+ * @author liuzunfei
+ * @version $Id: ServerNamingAbility.java, v 0.1 2021年01月24日 00:09 AM liuzunfei Exp $
+ */
+public class ServerNamingAbility implements Serializable {
+    
+    private static final long serialVersionUID = 8308895444341445512L;
+    
+    /**
+     * Nacos server can use SOFA-Jraft to handle persist service and metadata.
+     */
+    private boolean supportJraft;
+    
+    public boolean isSupportJraft() {
+        return supportJraft;
+    }
+    
+    public void setSupportJraft(boolean supportJraft) {
+        this.supportJraft = supportJraft;
+    }
+    
+    @Override
+    public boolean equals(Object o) {
+        if (this == o) {
+            return true;
+        }
+        if (!(o instanceof ServerNamingAbility)) {
+            return false;
+        }
+        ServerNamingAbility that = (ServerNamingAbility) o;
+        return supportJraft == that.supportJraft;
+    }
+    
+    @Override
+    public int hashCode() {
+        return Objects.hash(supportJraft);
+    }
+}

api/src/main/java/com/alibaba/nacos/api/naming/pojo/ServiceInfo.java

@@ -57,6 +57,8 @@ public class ServiceInfo {
     
     private volatile boolean allIPs = false;
     
+    private volatile boolean reachProtectionThreshold = false;
+    
     public ServiceInfo() {
     }
     
@@ -109,6 +111,18 @@ public class ServiceInfo {
         this.hosts = hosts;
     }
     
+    public void addHost(Instance host) {
+        hosts.add(host);
+    }
+    
+    public void addAllHosts(List<? extends Instance> hosts) {
+        this.hosts.addAll(hosts);
+    }
+    
+    public List<Instance> getHosts() {
+        return new ArrayList<Instance>(hosts);
+    }
+    
     public boolean isValid() {
         return hosts != null;
     }
@@ -153,10 +167,6 @@ public class ServiceInfo {
         this.cacheMillis = cacheMillis;
     }
     
-    public List<Instance> getHosts() {
-        return new ArrayList<Instance>(hosts);
-    }
-    
     /**
      * Judge whether service info is validate.
      *
@@ -275,6 +285,14 @@ public class ServiceInfo {
         return str1 == null ? str2 == null : str1.equals(str2);
     }
     
+    public boolean isReachProtectionThreshold() {
+        return reachProtectionThreshold;
+    }
+
+    public void setReachProtectionThreshold(boolean reachProtectionThreshold) {
+        this.reachProtectionThreshold = reachProtectionThreshold;
+    }
+
     private static final String EMPTY = "";
     
     private static final String ALL_IPS = "000--00-ALL_IPS--00--000";

api/src/main/java/com/alibaba/nacos/api/naming/pojo/healthcheck/AbstractHealthChecker.java

@@ -68,6 +68,8 @@ public abstract class AbstractHealthChecker implements Cloneable, Serializable {
         
         public static final String TYPE = "NONE";
     
+        private static final long serialVersionUID = -760631831097384737L;
+    
         public None() {
             super(TYPE);
         }

api/src/main/java/com/alibaba/nacos/api/naming/pojo/healthcheck/impl/Http.java

@@ -35,6 +35,8 @@ public class Http extends AbstractHealthChecker {
     
     public static final String TYPE = "HTTP";
     
+    private static final long serialVersionUID = 551826315222362349L;
+    
     private String path = "";
     
     private String headers = "";

api/src/main/java/com/alibaba/nacos/api/naming/pojo/healthcheck/impl/Mysql.java

@@ -29,6 +29,8 @@ public class Mysql extends AbstractHealthChecker {
     
     public static final String TYPE = "MYSQL";
     
+    private static final long serialVersionUID = 7928108094599401491L;
+    
     private String user;
     
     private String pwd;

api/src/main/java/com/alibaba/nacos/api/naming/pojo/healthcheck/impl/Tcp.java

@@ -28,6 +28,8 @@ public class Tcp extends AbstractHealthChecker {
     
     public static final String TYPE = "TCP";
     
+    private static final long serialVersionUID = -9116042038157496294L;
+    
     public Tcp() {
         super(TYPE);
     }

api/src/main/java/com/alibaba/nacos/api/naming/remote/NamingRemoteConstants.java

@@ -0,0 +1,42 @@
+/*
+ * Copyright 1999-2018 Alibaba Group Holding Ltd.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * 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.
+ */
+
+package com.alibaba.nacos.api.naming.remote;
+
+/**
+ * Retain all naming module request type constants.
+ *
+ * @author liuzunfei
+ * @author xiweng.yy
+ */
+public class NamingRemoteConstants {
+    
+    public static final String REGISTER_INSTANCE = "registerInstance";
+    
+    public static final String DE_REGISTER_INSTANCE = "deregisterInstance";
+    
+    public static final String QUERY_SERVICE = "queryService";
+    
+    public static final String SUBSCRIBE_SERVICE = "subscribeService";
+    
+    public static final String NOTIFY_SUBSCRIBER = "notifySubscriber";
+    
+    public static final String LIST_SERVICE = "listService";
+    
+    public static final String FORWARD_INSTANCE = "forwardInstance";
+    
+    public static final String FORWARD_HEART_BEAT = "forwardHeartBeat";
+}

api/src/main/java/com/alibaba/nacos/api/naming/remote/request/AbstractNamingRequest.java

@@ -0,0 +1,71 @@
+/*
+ * Copyright 1999-2018 Alibaba Group Holding Ltd.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * 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.
+ */
+
+package com.alibaba.nacos.api.naming.remote.request;
+
+import com.alibaba.nacos.api.remote.request.Request;
+
+/**
+ * Uniform remote request of naming module.
+ *
+ * @author liuzunfei
+ */
+public abstract class AbstractNamingRequest extends Request {
+    
+    private String namespace;
+    
+    private String serviceName;
+    
+    private String groupName;
+    
+    public AbstractNamingRequest() {
+    }
+    
+    public AbstractNamingRequest(String namespace, String serviceName, String groupName) {
+        this.namespace = namespace;
+        this.serviceName = serviceName;
+        this.groupName = groupName;
+    }
+    
+    @Override
+    public String getModule() {
+        return "naming";
+    }
+    
+    public String getNamespace() {
+        return namespace;
+    }
+    
+    public void setNamespace(String namespace) {
+        this.namespace = namespace;
+    }
+    
+    public String getServiceName() {
+        return serviceName;
+    }
+    
+    public void setServiceName(String serviceName) {
+        this.serviceName = serviceName;
+    }
+    
+    public String getGroupName() {
+        return groupName;
+    }
+    
+    public void setGroupName(String groupName) {
+        this.groupName = groupName;
+    }
+}

api/src/main/java/com/alibaba/nacos/api/naming/remote/request/InstanceRequest.java

@@ -14,26 +14,38 @@
  * limitations under the License.
  */
 
-package com.alibaba.nacos.naming.healthcheck.events;
+package com.alibaba.nacos.api.naming.remote.request;
 
-import com.alibaba.nacos.naming.core.Instance;
-import org.springframework.context.ApplicationEvent;
+import com.alibaba.nacos.api.naming.pojo.Instance;
 
 /**
- * Instance heart beat timeout event.
+ * Nacos instances request.
  *
- * @author pbting
- * @date 2019-05-28 8:29 PM
+ * @author xiweng.yy
  */
-public class InstanceHeartbeatTimeoutEvent extends ApplicationEvent {
+public class InstanceRequest extends AbstractNamingRequest {
+    
+    private String type;
     
     private Instance instance;
     
-    public InstanceHeartbeatTimeoutEvent(Object source, Instance instance) {
-        super(source);
+    public InstanceRequest() {
+    }
+    
+    public InstanceRequest(String namespace, String serviceName, String groupName, String type, Instance instance) {
+        super(namespace, serviceName, groupName);
+        this.type = type;
         this.instance = instance;
     }
     
+    public void setType(String type) {
+        this.type = type;
+    }
+    
+    public String getType() {
+        return this.type;
+    }
+    
     public void setInstance(Instance instance) {
         this.instance = instance;
     }

api/src/main/java/com/alibaba/nacos/api/naming/remote/request/NotifySubscriberRequest.java

@@ -0,0 +1,96 @@
+/*
+ * Copyright 1999-2020 Alibaba Group Holding Ltd.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * 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.
+ */
+
+package com.alibaba.nacos.api.naming.remote.request;
+
+import com.alibaba.nacos.api.naming.pojo.ServiceInfo;
+import com.alibaba.nacos.api.remote.request.ServerRequest;
+
+/**
+ * Notify subscriber response.
+ *
+ * @author xiweng.yy
+ */
+public class NotifySubscriberRequest extends ServerRequest {
+    
+    private String namespace;
+    
+    private String serviceName;
+    
+    private String groupName;
+    
+    private ServiceInfo serviceInfo;
+    
+    public NotifySubscriberRequest() {
+    }
+    
+    @Override
+    public String getModule() {
+        return "naming";
+    }
+    
+    private NotifySubscriberRequest(ServiceInfo serviceInfo, String message) {
+        this.serviceInfo = serviceInfo;
+    }
+    
+    public static NotifySubscriberRequest buildSuccessResponse(ServiceInfo serviceInfo) {
+        return new NotifySubscriberRequest(serviceInfo, "success");
+    }
+    
+    /**
+     * Build fail response.
+     *
+     * @param message error message
+     * @return fail response
+     */
+    public static NotifySubscriberRequest buildFailResponse(String message) {
+        NotifySubscriberRequest result = new NotifySubscriberRequest();
+        return result;
+    }
+    
+    public ServiceInfo getServiceInfo() {
+        return serviceInfo;
+    }
+    
+    public void setServiceInfo(ServiceInfo serviceInfo) {
+        this.serviceInfo = serviceInfo;
+    }
+    
+    public String getNamespace() {
+        return namespace;
+    }
+    
+    public void setNamespace(String namespace) {
+        this.namespace = namespace;
+    }
+    
+    public String getServiceName() {
+        return serviceName;
+    }
+    
+    public void setServiceName(String serviceName) {
+        this.serviceName = serviceName;
+    }
+    
+    public String getGroupName() {
+        return groupName;
+    }
+    
+    public void setGroupName(String groupName) {
+        this.groupName = groupName;
+    }
+    
+}

api/src/main/java/com/alibaba/nacos/api/naming/remote/request/ServiceListRequest.java

@@ -0,0 +1,64 @@
+/*
+ * Copyright 1999-2018 Alibaba Group Holding Ltd.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * 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.
+ */
+
+package com.alibaba.nacos.api.naming.remote.request;
+
+/**
+ * Service list request.
+ *
+ * @author xiweng.yy
+ */
+public class ServiceListRequest extends AbstractNamingRequest {
+    
+    private int pageNo;
+    
+    private int pageSize;
+    
+    private String selector;
+    
+    public ServiceListRequest() {
+    }
+    
+    public ServiceListRequest(String namespace, String groupName, int pageNo, int pageSize) {
+        super(namespace, "", groupName);
+        this.pageNo = pageNo;
+        this.pageSize = pageSize;
+    }
+    
+    public int getPageNo() {
+        return pageNo;
+    }
+    
+    public void setPageNo(int pageNo) {
+        this.pageNo = pageNo;
+    }
+    
+    public int getPageSize() {
+        return pageSize;
+    }
+    
+    public void setPageSize(int pageSize) {
+        this.pageSize = pageSize;
+    }
+    
+    public String getSelector() {
+        return selector;
+    }
+    
+    public void setSelector(String selector) {
+        this.selector = selector;
+    }
+}

api/src/main/java/com/alibaba/nacos/api/naming/remote/request/ServiceQueryRequest.java

@@ -0,0 +1,62 @@
+/*
+ * Copyright 1999-2018 Alibaba Group Holding Ltd.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * 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.
+ */
+
+package com.alibaba.nacos.api.naming.remote.request;
+
+/**
+ * Nacos naming query request.
+ *
+ * @author xiweng.yy
+ */
+public class ServiceQueryRequest extends AbstractNamingRequest {
+    
+    private String cluster;
+    
+    private boolean healthyOnly;
+    
+    private int udpPort;
+    
+    public ServiceQueryRequest() {
+    }
+    
+    public ServiceQueryRequest(String namespace, String serviceName, String groupName) {
+        super(namespace, serviceName, groupName);
+    }
+    
+    public String getCluster() {
+        return cluster;
+    }
+    
+    public void setCluster(String cluster) {
+        this.cluster = cluster;
+    }
+    
+    public boolean isHealthyOnly() {
+        return healthyOnly;
+    }
+    
+    public void setHealthyOnly(boolean healthyOnly) {
+        this.healthyOnly = healthyOnly;
+    }
+    
+    public int getUdpPort() {
+        return udpPort;
+    }
+    
+    public void setUdpPort(int udpPort) {
+        this.udpPort = udpPort;
+    }
+}

api/src/main/java/com/alibaba/nacos/api/naming/remote/request/SubscribeServiceRequest.java

@@ -0,0 +1,55 @@
+/*
+ * Copyright 1999-2018 Alibaba Group Holding Ltd.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * 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.
+ */
+
+package com.alibaba.nacos.api.naming.remote.request;
+
+/**
+ * Nacos naming subscribe service request.
+ *
+ * @author xiweng.yy
+ */
+public class SubscribeServiceRequest extends AbstractNamingRequest {
+    
+    private boolean subscribe;
+    
+    private String clusters;
+    
+    public SubscribeServiceRequest() {
+    }
+    
+    public SubscribeServiceRequest(String namespace, String groupName, String serviceName, String clusters,
+            boolean subscribe) {
+        super(namespace, serviceName, groupName);
+        this.clusters = clusters;
+        this.subscribe = subscribe;
+    }
+    
+    public String getClusters() {
+        return clusters;
+    }
+    
+    public void setClusters(String clusters) {
+        this.clusters = clusters;
+    }
+    
+    public boolean isSubscribe() {
+        return subscribe;
+    }
+    
+    public void setSubscribe(boolean subscribe) {
+        this.subscribe = subscribe;
+    }
+}

api/src/main/java/com/alibaba/nacos/api/naming/remote/response/InstanceResponse.java

@@ -0,0 +1,41 @@
+/*
+ * Copyright 1999-2018 Alibaba Group Holding Ltd.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * 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.
+ */
+
+package com.alibaba.nacos.api.naming.remote.response;
+
+import com.alibaba.nacos.api.remote.response.Response;
+
+/**
+ * Instance response.
+ *
+ * @author xiweng.yy
+ */
+public class InstanceResponse extends Response {
+    
+    private String type;
+    
+    public InstanceResponse() {
+    }
+    
+    public InstanceResponse(String type) {
+        this.type = type;
+    }
+    
+    public void setType(String type) {
+        this.type = type;
+    }
+    
+}

api/src/main/java/com/alibaba/nacos/api/naming/remote/response/NotifySubscriberResponse.java

@@ -0,0 +1,28 @@
+/*
+ * Copyright 1999-2020 Alibaba Group Holding Ltd.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * 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.
+ */
+
+package com.alibaba.nacos.api.naming.remote.response;
+
+import com.alibaba.nacos.api.remote.response.Response;
+
+/**
+ * response for notify service subscribe.
+ * @author liuzunfei
+ * @version $Id: NotifySubscriberResponse.java, v 0.1 2020年08月06日 5:28 PM liuzunfei Exp $
+ */
+public class NotifySubscriberResponse extends Response {
+    
+}

api/src/main/java/com/alibaba/nacos/api/naming/remote/response/QueryServiceResponse.java

@@ -0,0 +1,69 @@
+/*
+ * Copyright 1999-2018 Alibaba Group Holding Ltd.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * 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.
+ */
+
+package com.alibaba.nacos.api.naming.remote.response;
+
+import com.alibaba.nacos.api.naming.pojo.ServiceInfo;
+import com.alibaba.nacos.api.remote.response.Response;
+import com.alibaba.nacos.api.remote.response.ResponseCode;
+
+/**
+ * Nacos naming query request.
+ *
+ * @author xiweng.yy
+ */
+public class QueryServiceResponse extends Response {
+    
+    private ServiceInfo serviceInfo;
+    
+    public QueryServiceResponse() {
+    }
+    
+    private QueryServiceResponse(ServiceInfo serviceInfo) {
+        this.serviceInfo = serviceInfo;
+    }
+    
+    /**
+     * Build Success response.
+     *
+     * @param serviceInfo service info
+     * @return service query response
+     */
+    public static QueryServiceResponse buildSuccessResponse(ServiceInfo serviceInfo) {
+        return new QueryServiceResponse(serviceInfo);
+    }
+    
+    /**
+     * Build fail response.
+     *
+     * @param message message
+     * @return service query response
+     */
+    public static QueryServiceResponse buildFailResponse(String message) {
+        QueryServiceResponse queryServiceResponse = new QueryServiceResponse();
+        queryServiceResponse.setResultCode(ResponseCode.FAIL.getCode());
+        queryServiceResponse.setMessage(message);
+        return queryServiceResponse;
+    }
+    
+    public ServiceInfo getServiceInfo() {
+        return serviceInfo;
+    }
+    
+    public void setServiceInfo(ServiceInfo serviceInfo) {
+        this.serviceInfo = serviceInfo;
+    }
+}

api/src/main/java/com/alibaba/nacos/api/naming/remote/response/ServiceListResponse.java

@@ -0,0 +1,74 @@
+/*
+ * Copyright 1999-2018 Alibaba Group Holding Ltd.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * 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.
+ */
+
+package com.alibaba.nacos.api.naming.remote.response;
+
+import com.alibaba.nacos.api.remote.response.Response;
+import com.alibaba.nacos.api.remote.response.ResponseCode;
+
+import java.util.List;
+
+/**
+ * Service list response.
+ *
+ * @author xiweng.yy
+ */
+public class ServiceListResponse extends Response {
+    
+    private int count;
+    
+    private List<String> serviceNames;
+    
+    public ServiceListResponse(){
+    }
+    
+    private ServiceListResponse(int count, List<String> serviceNames, String message) {
+        this.count = count;
+        this.serviceNames = serviceNames;
+    }
+    
+    public static ServiceListResponse buildSuccessResponse(int count, List<String> serviceNames) {
+        return new ServiceListResponse(count, serviceNames, "success");
+    }
+    
+    /**
+     * Build fail response.
+     *
+     * @param message error message
+     * @return fail response
+     */
+    public static ServiceListResponse buildFailResponse(String message) {
+        ServiceListResponse result = new ServiceListResponse();
+        result.setErrorInfo(ResponseCode.FAIL.getCode(), message);
+        return result;
+    }
+    
+    public int getCount() {
+        return count;
+    }
+    
+    public void setCount(int count) {
+        this.count = count;
+    }
+    
+    public List<String> getServiceNames() {
+        return serviceNames;
+    }
+    
+    public void setServiceNames(List<String> serviceNames) {
+        this.serviceNames = serviceNames;
+    }
+}

api/src/main/java/com/alibaba/nacos/api/naming/remote/response/SubscribeServiceResponse.java

@@ -0,0 +1,48 @@
+/*
+ * Copyright 1999-2018 Alibaba Group Holding Ltd.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * 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.
+ */
+
+package com.alibaba.nacos.api.naming.remote.response;
+
+import com.alibaba.nacos.api.naming.pojo.ServiceInfo;
+import com.alibaba.nacos.api.remote.response.Response;
+
+/**
+ * Nacos naming subscribe service response.
+ *
+ * @author xiweng.yy
+ */
+public class SubscribeServiceResponse extends Response {
+    
+    private ServiceInfo serviceInfo;
+    
+    public SubscribeServiceResponse() {
+    }
+    
+    public SubscribeServiceResponse(int resultCode, String message, ServiceInfo serviceInfo) {
+        super();
+        setResultCode(resultCode);
+        setMessage(message);
+        this.serviceInfo = serviceInfo;
+    }
+    
+    public ServiceInfo getServiceInfo() {
+        return serviceInfo;
+    }
+    
+    public void setServiceInfo(ServiceInfo serviceInfo) {
+        this.serviceInfo = serviceInfo;
+    }
+}

api/src/main/java/com/alibaba/nacos/api/remote/AbstractPushCallBack.java

@@ -0,0 +1,37 @@
+/*
+ * Copyright 1999-2020 Alibaba Group Holding Ltd.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * 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.
+ */
+
+package com.alibaba.nacos.api.remote;
+
+/**
+ * abstract callback of push service.
+ *
+ * @author liuzunfei
+ * @version $Id: PushCallBack.java, v 0.1 2020年07月20日 1:13 PM liuzunfei Exp $
+ */
+public abstract class AbstractPushCallBack implements PushCallBack {
+    
+    private long timeout;
+    
+    public AbstractPushCallBack(long timeout) {
+        this.timeout = timeout;
+    }
+    
+    @Override
+    public long getTimeout() {
+        return timeout;
+    }
+}

api/src/main/java/com/alibaba/nacos/api/remote/AbstractRequestCallBack.java

@@ -0,0 +1,41 @@
+/*
+ * Copyright 1999-2020 Alibaba Group Holding Ltd.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * 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.
+ */
+
+package com.alibaba.nacos.api.remote;
+
+/**
+ * abstract request call back.
+ *
+ * @author liuzunfei
+ * @version $Id: AbstractRequestCallBack.java, v 0.1 2020年09月07日 3:30 PM liuzunfei Exp $
+ */
+public abstract class AbstractRequestCallBack implements RequestCallBack {
+    
+    long timeoutMills;
+    
+    public AbstractRequestCallBack(long timeoutMill) {
+        this.timeoutMills = timeoutMill;
+    }
+    
+    public AbstractRequestCallBack() {
+        this(3000L);
+    }
+    
+    @Override
+    public long getTimeout() {
+        return timeoutMills;
+    }
+}

api/src/main/java/com/alibaba/nacos/api/remote/DefaultRequestFuture.java

@@ -0,0 +1,225 @@
+/*
+ * Copyright 1999-2020 Alibaba Group Holding Ltd.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * 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.
+ */
+
+package com.alibaba.nacos.api.remote;
+
+import com.alibaba.nacos.api.remote.response.Response;
+
+import java.util.concurrent.ScheduledFuture;
+import java.util.concurrent.TimeUnit;
+import java.util.concurrent.TimeoutException;
+
+/**
+ * default request future.
+ *
+ * @author liuzunfei
+ * @version $Id: DefaultRequestFuture.java, v 0.1 2020年09月01日 6:42 PM liuzunfei Exp $
+ */
+public class DefaultRequestFuture implements RequestFuture {
+    
+    private long timeStamp;
+    
+    private volatile boolean isDone = false;
+    
+    private boolean isSuccess;
+    
+    private RequestCallBack requestCallBack;
+    
+    private Exception exception;
+    
+    private String requestId;
+    
+    private String connectionId;
+    
+    private Response response;
+    
+    private ScheduledFuture timeoutFuture;
+    
+    TimeoutInnerTrigger timeoutInnerTrigger;
+    
+    /**
+     * Getter method for property <tt>requestCallBack</tt>.
+     *
+     * @return property value of requestCallBack
+     */
+    public RequestCallBack getRequestCallBack() {
+        return requestCallBack;
+    }
+    
+    /**
+     * Getter method for property <tt>timeStamp</tt>.
+     *
+     * @return property value of timeStamp
+     */
+    public long getTimeStamp() {
+        return timeStamp;
+    }
+    
+    public DefaultRequestFuture() {
+    }
+    
+    public DefaultRequestFuture(String connectionId, String requestId) {
+        this(connectionId, requestId, null, null);
+    }
+    
+    public DefaultRequestFuture(String connectionId, String requestId, RequestCallBack requestCallBack,
+            TimeoutInnerTrigger timeoutInnerTrigger) {
+        this.timeStamp = System.currentTimeMillis();
+        this.requestCallBack = requestCallBack;
+        this.requestId = requestId;
+        this.connectionId = connectionId;
+        if (requestCallBack != null) {
+            this.timeoutFuture = RpcScheduledExecutor.TIMEOUT_SCHEDULER
+                    .schedule(new TimeoutHandler(), requestCallBack.getTimeout(), TimeUnit.MILLISECONDS);
+        }
+        this.timeoutInnerTrigger = timeoutInnerTrigger;
+    }
+    
+    public void setResponse(final Response response) {
+        isDone = true;
+        this.response = response;
+        this.isSuccess = response.isSuccess();
+        if (this.timeoutFuture != null) {
+            timeoutFuture.cancel(true);
+        }
+        synchronized (this) {
+            notifyAll();
+        }
+        
+        callBacInvoke();
+    }
+    
+    public void setFailResult(Exception e) {
+        isDone = true;
+        isSuccess = false;
+        this.exception = e;
+        synchronized (this) {
+            notifyAll();
+        }
+        
+        callBacInvoke();
+    }
+    
+    private void callBacInvoke() {
+        if (requestCallBack != null) {
+            if (requestCallBack.getExecutor() != null) {
+                requestCallBack.getExecutor().execute(new CallBackHandler());
+            } else {
+                new CallBackHandler().run();
+            }
+        }
+    }
+    
+    public String getRequestId() {
+        return this.requestId;
+    }
+    
+    @Override
+    public boolean isDone() {
+        return isDone;
+    }
+    
+    @Override
+    public Response get() throws InterruptedException {
+        synchronized (this) {
+            while (!isDone) {
+                wait();
+            }
+        }
+        return response;
+    }
+    
+    @Override
+    public Response get(long timeout) throws TimeoutException, InterruptedException {
+        if (timeout < 0) {
+            synchronized (this) {
+                while (!isDone) {
+                    wait();
+                }
+            }
+        } else if (timeout > 0) {
+            long end = System.currentTimeMillis() + timeout;
+            long waitTime = timeout;
+            synchronized (this) {
+                while (!isDone && waitTime > 0) {
+                    wait(waitTime);
+                    waitTime = end - System.currentTimeMillis();
+                }
+            }
+        }
+        
+        if (isDone) {
+            return response;
+        } else {
+            if (timeoutInnerTrigger != null) {
+                timeoutInnerTrigger.triggerOnTimeout();
+            }
+            throw new TimeoutException("request timeout after " + timeout + " milliseconds, requestId=" + requestId);
+        }
+    }
+    
+    class CallBackHandler implements Runnable {
+        
+        @Override
+        public void run() {
+            if (exception != null) {
+                requestCallBack.onException(exception);
+            } else {
+                requestCallBack.onResponse(response);
+            }
+        }
+    }
+    
+    class TimeoutHandler implements Runnable {
+        
+        public TimeoutHandler() {
+        }
+        
+        @Override
+        public void run() {
+            setFailResult(new TimeoutException(
+                    "Timeout After " + requestCallBack.getTimeout() + " milliseconds,requestId =" + requestId));
+        }
+    }
+    
+    public interface TimeoutInnerTrigger {
+        
+        /**
+         * triggered on timeout .
+         */
+        public void triggerOnTimeout();
+        
+    }
+    
+    /**
+     * Getter method for property <tt>connectionId</tt>.
+     *
+     * @return property value of connectionId
+     */
+    public String getConnectionId() {
+        return connectionId;
+    }
+    
+    /**
+     * Setter method for property <tt>timeoutFuture</tt>.
+     *
+     * @param timeoutFuture value to be assigned to property timeoutFuture
+     */
+    public void setTimeoutFuture(ScheduledFuture timeoutFuture) {
+        this.timeoutFuture = timeoutFuture;
+    }
+    
+}

api/src/main/java/com/alibaba/nacos/api/remote/PayloadRegistry.java

@@ -0,0 +1,94 @@
+/*
+ * Copyright 1999-2020 Alibaba Group Holding Ltd.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * 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.
+ */
+
+package com.alibaba.nacos.api.remote;
+
+import com.alibaba.nacos.api.remote.request.Request;
+import com.alibaba.nacos.api.remote.response.Response;
+import org.reflections.Reflections;
+
+import java.lang.reflect.Modifier;
+import java.util.Arrays;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import java.util.Set;
+
+/**
+ * payload regitry,include all request and response.
+ *
+ * @author liuzunfei
+ * @version $Id: PayloadRegistry.java, v 0.1 2020年09月01日 10:56 AM liuzunfei Exp $
+ */
+
+public class PayloadRegistry {
+    
+    private static final Map<String, Class> REGISTRY_REQUEST = new HashMap<String, Class>();
+    
+    static boolean initialized = false;
+    
+    public static void init() {
+        scan();
+    }
+    
+    private static synchronized void scan() {
+        if (initialized) {
+            return;
+        }
+        
+        List<String> requestScanPackage = Arrays
+                .asList("com.alibaba.nacos.api.naming.remote.request", "com.alibaba.nacos.api.config.remote.request",
+                        "com.alibaba.nacos.api.remote.request", "com.alibaba.nacos.naming.cluster.remote.request");
+        for (String pkg : requestScanPackage) {
+            Reflections reflections = new Reflections(pkg);
+            Set<Class<? extends Request>> subTypesRequest = reflections.getSubTypesOf(Request.class);
+            for (Class clazz : subTypesRequest) {
+                register(clazz.getSimpleName(), clazz);
+            }
+        }
+        
+        List<String> responseScanPackage = Arrays
+                .asList("com.alibaba.nacos.api.naming.remote.response",
+                "com.alibaba.nacos.api.config.remote.response", "com.alibaba.nacos.api.remote.response",
+                "com.alibaba.nacos.naming.cluster.remote.response");
+        for (String pkg : responseScanPackage) {
+            Reflections reflections = new Reflections(pkg);
+            Set<Class<? extends Response>> subTypesOfResponse = reflections.getSubTypesOf(Response.class);
+            for (Class clazz : subTypesOfResponse) {
+                register(clazz.getSimpleName(), clazz);
+            }
+        }
+        
+        initialized = true;
+    }
+    
+    static void register(String type, Class clazz) {
+        if (Modifier.isAbstract(clazz.getModifiers())) {
+            return;
+        }
+        if (Modifier.isInterface(clazz.getModifiers())) {
+            return;
+        }
+        if (REGISTRY_REQUEST.containsKey(type)) {
+            throw new RuntimeException(String.format("Fail to register, type:%s ,clazz:%s ", type, clazz.getName()));
+        }
+        REGISTRY_REQUEST.put(type, clazz);
+    }
+    
+    public static Class getClassByType(String type) {
+        return REGISTRY_REQUEST.get(type);
+    }
+}

api/src/main/java/com/alibaba/nacos/api/remote/PushCallBack.java

@@ -0,0 +1,46 @@
+/*
+ * Copyright 1999-2020 Alibaba Group Holding Ltd.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * 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.
+ */
+
+package com.alibaba.nacos.api.remote;
+
+/**
+ * callback of push service.
+ *
+ * @author liuzunfei
+ * @version $Id: PushCallBack.java, v 0.1 2020年07月20日 1:13 PM liuzunfei Exp $
+ */
+public interface PushCallBack {
+    
+    /**
+     * Push timeout mills.
+     *
+     * @return timeout milliseconds
+     */
+    long getTimeout();
+    
+    /**
+     * invoked on success.
+     */
+    void onSuccess();
+    
+    /**
+     * invoked on fail.
+     *
+     * @param e exception throwed.
+     */
+    void onFail(Throwable e);
+    
+}

api/src/main/java/com/alibaba/nacos/api/remote/RemoteConstants.java

@@ -0,0 +1,41 @@
+/*
+ * Copyright 1999-2020 Alibaba Group Holding Ltd.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * 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.
+ */
+
+package com.alibaba.nacos.api.remote;
+
+/**
+ * constants define of remote.
+ *
+ * @author liuzunfei
+ * @version $Id: ConnectionMetaConstants.java, v 0.1 2020年08月13日 1:05 PM liuzunfei Exp $
+ */
+public class RemoteConstants {
+    
+    /**
+     * label key value  define.
+     */
+    public static final String LABEL_SOURCE = "source";
+    
+    public static final String LABEL_SOURCE_SDK = "sdk";
+    
+    public static final String LABEL_SOURCE_CLUSTER = "cluster";
+    
+    public static final String LABEL_MODULE = "module";
+    
+    public static final String LABEL_MODULE_CONFIG = "config";
+    
+    public static final String LABEL_MODULE_NAMING = "naming";
+}

api/src/main/java/com/alibaba/nacos/api/remote/RequestCallBack.java

@@ -0,0 +1,59 @@
+/*
+ * Copyright 1999-2020 Alibaba Group Holding Ltd.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * 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.
+ */
+
+package com.alibaba.nacos.api.remote;
+
+import com.alibaba.nacos.api.remote.response.Response;
+
+import java.util.concurrent.Executor;
+
+/**
+ * call back for request.
+ *
+ * @author liuzunfei
+ * @version $Id: PushCallBack.java, v 0.1 2020年09月01日 6:33 PM liuzunfei Exp $
+ */
+public interface RequestCallBack<T extends Response> {
+    
+    /**
+     * get executor on callback.
+     *
+     * @return executor.
+     */
+    public Executor getExecutor();
+    
+    /**
+     * get timeout mills.
+     *
+     * @return timeouts.
+     */
+    public long getTimeout();
+    
+    /**
+     * called on success.
+     *
+     * @param response response received.
+     */
+    public void onResponse(T response);
+    
+    /**
+     * called on failed.
+     *
+     * @param e exception throwed.
+     */
+    public void onException(Throwable e);
+    
+}

api/src/main/java/com/alibaba/nacos/api/remote/RequestFuture.java

@@ -0,0 +1,53 @@
+/*
+ * Copyright 1999-2020 Alibaba Group Holding Ltd.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * 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.
+ */
+
+package com.alibaba.nacos.api.remote;
+
+import com.alibaba.nacos.api.remote.response.Response;
+
+/**
+ * future for request.
+ *
+ * @author liuzunfei
+ * @version $Id: RequestFuture.java, v 0.1 2020年09月01日 6:31 PM liuzunfei Exp $
+ */
+public interface RequestFuture {
+    
+    /**
+     * check that it is done or not..
+     *
+     * @return is done .
+     */
+    boolean isDone();
+    
+    /**
+     * get response without timeouts.
+     *
+     * @return return response if done.
+     * @throws Exception exception throws .
+     */
+    Response get() throws Exception;
+    
+    /**
+     * get response with a given timeouts.
+     *
+     * @param timeout timeout milliseconds.
+     * @return return response if done.
+     * @throws Exception exception throws .
+     */
+    Response get(long timeout) throws Exception;
+    
+}

api/src/main/java/com/alibaba/nacos/api/remote/Requester.java

@@ -0,0 +1,64 @@
+/*
+ * Copyright 1999-2020 Alibaba Group Holding Ltd.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * 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.
+ */
+
+package com.alibaba.nacos.api.remote;
+
+import com.alibaba.nacos.api.exception.NacosException;
+import com.alibaba.nacos.api.remote.request.Request;
+import com.alibaba.nacos.api.remote.response.Response;
+
+/**
+ * connection interface,define basic operation.
+ *
+ * @author liuzunfei
+ * @version $Id: Requester.java, v 0.1 2020年09月11日 4:05 PM liuzunfei Exp $
+ */
+public interface Requester {
+    
+    /**
+     * send request.
+     *
+     * @param request      request.
+     * @param timeoutMills mills of timeouts.
+     * @return response  response returned.
+     * @throws NacosException exception throw.
+     */
+    Response request(Request request, long timeoutMills) throws NacosException;
+    
+    /**
+     * send request.
+     *
+     * @param request request.
+     * @return request future.
+     * @throws NacosException exception throw.
+     */
+    RequestFuture requestFuture(Request request) throws NacosException;
+    
+    /**
+     * send async request.
+     *
+     * @param request         request.
+     * @param requestCallBack callback of request.
+     * @throws NacosException exception throw.
+     */
+    void asyncRequest(Request request, RequestCallBack requestCallBack) throws NacosException;
+    
+    /**
+     * close connection.
+     */
+    void close();
+    
+}

api/src/main/java/com/alibaba/nacos/api/remote/RpcScheduledExecutor.java

@@ -0,0 +1,45 @@
+/*
+ * Copyright 1999-2020 Alibaba Group Holding Ltd.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * 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.
+ */
+
+package com.alibaba.nacos.api.remote;
+
+import java.util.concurrent.ScheduledThreadPoolExecutor;
+import java.util.concurrent.ThreadFactory;
+
+/**
+ * rpc scheduler executor .
+ *
+ * @author liuzunfei
+ * @version $Id: RpcScheduledExecutor.java, v 0.1 2020年09月07日 4:12 PM liuzunfei Exp $
+ */
+public class RpcScheduledExecutor extends ScheduledThreadPoolExecutor {
+    
+    public static final RpcScheduledExecutor TIMEOUT_SCHEDULER = new RpcScheduledExecutor(1,
+            "com.alibaba.nacos.remote.TimerScheduler");
+    
+    public static final RpcScheduledExecutor COMMON_SERVER_EXECUTOR = new RpcScheduledExecutor(1,
+            "com.alibaba.nacos.remote.ServerCommonScheduler");
+    
+    public RpcScheduledExecutor(int corePoolSize, final String threadName) {
+        super(corePoolSize, new ThreadFactory() {
+            @Override
+            public Thread newThread(Runnable r) {
+                return new Thread(r, threadName);
+            }
+        });
+    }
+    
+}

api/src/main/java/com/alibaba/nacos/api/remote/request/ClientDetectionRequest.java

@@ -0,0 +1,32 @@
+/*
+ * Copyright 1999-2020 Alibaba Group Holding Ltd.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * 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.
+ */
+
+package com.alibaba.nacos.api.remote.request;
+
+/**
+ * client active detection request from server.
+ *
+ * @author liuzunfei
+ * @version $Id: ClientDetectionRequest.java, v 0.1 2021年01月20日 2:42 PM liuzunfei Exp $
+ */
+public class ClientDetectionRequest extends ServerRequest {
+    
+    @Override
+    public String getModule() {
+        return "internal";
+    }
+    
+}

api/src/main/java/com/alibaba/nacos/api/remote/request/ConnectResetRequest.java

@@ -0,0 +1,71 @@
+/*
+ * Copyright 1999-2020 Alibaba Group Holding Ltd.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * 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.
+ */
+
+package com.alibaba.nacos.api.remote.request;
+
+/**
+ * ConnectResetRequest.
+ *
+ * @author liuzunfei
+ * @version $Id: ConnectResetRequest.java, v 0.1 2020年07月15日 11:11 AM liuzunfei Exp $
+ */
+public class ConnectResetRequest extends ServerRequest {
+    
+    String serverIp;
+    
+    String serverPort;
+    
+    @Override
+    public String getModule() {
+        return "internal";
+    }
+    
+    /**
+     * Getter method for property <tt>serverIp</tt>.
+     *
+     * @return property value of serverIp
+     */
+    public String getServerIp() {
+        return serverIp;
+    }
+    
+    /**
+     * Setter method for property <tt>serverIp</tt>.
+     *
+     * @param serverIp value to be assigned to property serverIp
+     */
+    public void setServerIp(String serverIp) {
+        this.serverIp = serverIp;
+    }
+    
+    /**
+     * Getter method for property <tt>serverPort</tt>.
+     *
+     * @return property value of serverPort
+     */
+    public String getServerPort() {
+        return serverPort;
+    }
+    
+    /**
+     * Setter method for property <tt>serverPort</tt>.
+     *
+     * @param serverPort value to be assigned to property serverPort
+     */
+    public void setServerPort(String serverPort) {
+        this.serverPort = serverPort;
+    }
+}

api/src/main/java/com/alibaba/nacos/api/remote/request/ConnectionSetupRequest.java

@@ -0,0 +1,74 @@
+/*
+ * Copyright 1999-2020 Alibaba Group Holding Ltd.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * 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.
+ */
+
+package com.alibaba.nacos.api.remote.request;
+
+import com.alibaba.nacos.api.ability.ClientAbilities;
+
+import java.util.HashMap;
+import java.util.Map;
+
+/**
+ * request to setup a connection.
+ *
+ * @author liuzunfei
+ * @version $Id: ConnectionSetupRequest.java, v 0.1 2020年08月06日 2:42 PM liuzunfei Exp $
+ */
+public class ConnectionSetupRequest extends InternalRequest {
+    
+    private String clientVersion;
+    
+    private ClientAbilities abilities;
+    
+    private String tenant;
+    
+    private Map<String, String> labels = new HashMap<String, String>();
+    
+    public ConnectionSetupRequest() {
+    }
+    
+    public String getClientVersion() {
+        return clientVersion;
+    }
+    
+    public void setClientVersion(String clientVersion) {
+        this.clientVersion = clientVersion;
+    }
+    
+    public Map<String, String> getLabels() {
+        return labels;
+    }
+    
+    public void setLabels(Map<String, String> labels) {
+        this.labels = labels;
+    }
+    
+    public String getTenant() {
+        return tenant;
+    }
+    
+    public void setTenant(String tenant) {
+        this.tenant = tenant;
+    }
+    
+    public ClientAbilities getAbilities() {
+        return abilities;
+    }
+    
+    public void setAbilities(ClientAbilities abilities) {
+        this.abilities = abilities;
+    }
+}

api/src/main/java/com/alibaba/nacos/api/remote/request/HealthCheckRequest.java

@@ -0,0 +1,27 @@
+/*
+ * Copyright 1999-2020 Alibaba Group Holding Ltd.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * 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.
+ */
+
+package com.alibaba.nacos.api.remote.request;
+
+/**
+ * request to check server if unimpeded.
+ *
+ * @author liuzunfei
+ * @version $Id: ServerCheckRequest.java, v 0.1 2020年07月22日 8:32 PM liuzunfei Exp $
+ */
+public class HealthCheckRequest extends InternalRequest {
+
+}

api/src/main/java/com/alibaba/nacos/api/remote/request/InternalRequest.java

@@ -0,0 +1,32 @@
+/*
+ * Copyright 1999-2020 Alibaba Group Holding Ltd.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * 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.
+ */
+
+package com.alibaba.nacos.api.remote.request;
+
+/**
+ * internal request .
+ *
+ * @author liuzunfei
+ * @version $Id: InternalRequest.java, v 0.1 2020年07月22日 8:33 PM liuzunfei Exp $
+ */
+@SuppressWarnings("PMD.AbstractClassShouldStartWithAbstractNamingRule")
+public abstract class InternalRequest extends Request {
+    
+    @Override
+    public String getModule() {
+        return "internal";
+    }
+}

api/src/main/java/com/alibaba/nacos/api/remote/request/PushAckRequest.java

@@ -0,0 +1,101 @@
+/*
+ * Copyright 1999-2020 Alibaba Group Holding Ltd.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * 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.
+ */
+
+package com.alibaba.nacos.api.remote.request;
+
+/**
+ * push ack request.
+ *
+ * @author liuzunfei
+ * @version $Id: PushAckRequest.java, v 0.1 2020年07月29日 8:25 PM liuzunfei Exp $
+ */
+public class PushAckRequest extends InternalRequest {
+    
+    private String requestId;
+    
+    private boolean success;
+    
+    private Exception exception;
+    
+    /**
+     * build push ack request.
+     *
+     * @param requestId requestId.
+     * @return request.
+     */
+    public static PushAckRequest build(String requestId, boolean success) {
+        PushAckRequest request = new PushAckRequest();
+        request.requestId = requestId;
+        request.success = success;
+        return request;
+    }
+    
+    /**
+     * Getter method for property <tt>requestId</tt>.
+     *
+     * @return property value of requestId
+     */
+    @Override
+    public String getRequestId() {
+        return requestId;
+    }
+    
+    /**
+     * Setter method for property <tt>requestId</tt>.
+     *
+     * @param requestId value to be assigned to property requestId
+     */
+    @Override
+    public void setRequestId(String requestId) {
+        this.requestId = requestId;
+    }
+    
+    /**
+     * Getter method for property <tt>success</tt>.
+     *
+     * @return property value of success
+     */
+    public boolean isSuccess() {
+        return success;
+    }
+    
+    /**
+     * Setter method for property <tt>success</tt>.
+     *
+     * @param success value to be assigned to property success
+     */
+    public void setSuccess(boolean success) {
+        this.success = success;
+    }
+    
+    /**
+     * Setter method for property <tt>exception</tt>.
+     *
+     * @param exception value to be assigned to property exception
+     */
+    public void setException(Exception exception) {
+        this.exception = exception;
+    }
+    
+    /**
+     * Getter method for property <tt>exception</tt>.
+     *
+     * @return property value of exception
+     */
+    public Exception getException() {
+        return exception;
+    }
+}

api/src/main/java/com/alibaba/nacos/api/remote/request/Request.java

@@ -0,0 +1,120 @@
+/*
+ * Copyright 1999-2020 Alibaba Group Holding Ltd.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * 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.
+ */
+
+package com.alibaba.nacos.api.remote.request;
+
+import java.util.HashMap;
+import java.util.Map;
+
+/**
+ * Request.
+ *
+ * @author liuzunfei
+ */
+@SuppressWarnings("PMD.AbstractClassShouldStartWithAbstractNamingRule")
+public abstract class Request {
+    
+    private final Map<String, String> headers = new HashMap<String, String>();
+    
+    private String requestId;
+    
+    /**
+     * put header.
+     *
+     * @param key   key of value.
+     * @param value value.
+     */
+    public void putHeader(String key, String value) {
+        headers.put(key, value);
+    }
+    
+    /**
+     * put headers .
+     *
+     * @param headers headers to put.
+     */
+    public void putAllHeader(Map<String, String> headers) {
+        if (headers == null || headers.isEmpty()) {
+            return;
+        }
+        this.headers.putAll(headers);
+    }
+    
+    /**
+     * get a header value .
+     *
+     * @param key key of value.
+     * @return return value of key. return null if not exist.
+     */
+    public String getHeader(String key) {
+        return headers.get(key);
+    }
+    
+    /**
+     * get a header value of defaut value.
+     *
+     * @param key          key of value.
+     * @param defaultValue default value if key is not exist.
+     * @return return final value.
+     */
+    public String getHeader(String key, String defaultValue) {
+        String value = headers.get(key);
+        return (value == null) ? defaultValue : value;
+    }
+    
+    /**
+     * Getter method for property <tt>requestId</tt>.
+     *
+     * @return property value of requestId
+     */
+    public String getRequestId() {
+        return requestId;
+    }
+    
+    /**
+     * Setter method for property <tt>requestId</tt>.
+     *
+     * @param requestId value to be assigned to property requestId
+     */
+    public void setRequestId(String requestId) {
+        this.requestId = requestId;
+    }
+    
+    /**
+     * Getter method for property <tt>type</tt>.
+     *
+     * @return property value of type
+     */
+    public abstract String getModule();
+    
+    /**
+     * Getter method for property <tt>headers</tt>.
+     *
+     * @return property value of headers
+     */
+    public Map<String, String> getHeaders() {
+        return headers;
+    }
+    
+    public void clearHeaders() {
+        this.headers.clear();
+    }
+    
+    @Override
+    public String toString() {
+        return this.getClass().getSimpleName() + "{" + "headers=" + headers + ", requestId='" + requestId + '\'' + '}';
+    }
+}

api/src/main/java/com/alibaba/nacos/api/remote/request/RequestMeta.java

@@ -0,0 +1,115 @@
+/*
+ * Copyright 1999-2020 Alibaba Group Holding Ltd.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * 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.
+ */
+
+package com.alibaba.nacos.api.remote.request;
+
+import java.util.HashMap;
+import java.util.Map;
+
+/**
+ * RequestMeta info.
+ *
+ * @author liuzunfei
+ * @version $Id: RequestMeta.java, v 0.1 2020年07月14日 10:32 AM liuzunfei Exp $
+ */
+public class RequestMeta {
+    
+    private String connectionId = "";
+    
+    private String clientIp = "";
+    
+    private String clientVersion = "";
+    
+    private Map<String, String> labels = new HashMap<String, String>();
+
+    /**
+     * Getter method for property <tt>clientVersion</tt>.
+     *
+     * @return property value of clientVersion
+     */
+    public String getClientVersion() {
+        return clientVersion;
+    }
+    
+    /**
+     * Setter method for property <tt>clientVersion</tt>.
+     *
+     * @param clientVersion value to be assigned to property clientVersion
+     */
+    public void setClientVersion(String clientVersion) {
+        this.clientVersion = clientVersion;
+    }
+    
+    /**
+     * Getter method for property <tt>labels</tt>.
+     *
+     * @return property value of labels
+     */
+    public Map<String, String> getLabels() {
+        return labels;
+    }
+    
+    /**
+     * Setter method for property <tt>labels</tt>.
+     *
+     * @param labels value to be assigned to property labels
+     */
+    public void setLabels(Map<String, String> labels) {
+        this.labels = labels;
+    }
+    
+    /**
+     * Getter method for property <tt>connectionId</tt>.
+     *
+     * @return property value of connectionId
+     */
+    public String getConnectionId() {
+        return connectionId;
+    }
+    
+    /**
+     * Setter method for property <tt>connectionId</tt>.
+     *
+     * @param connectionId value to be assigned to property connectionId
+     */
+    public void setConnectionId(String connectionId) {
+        this.connectionId = connectionId;
+    }
+    
+    /**
+     * Getter method for property <tt>clientIp</tt>.
+     *
+     * @return property value of clientIp
+     */
+    public String getClientIp() {
+        return clientIp;
+    }
+    
+    /**
+     * Setter method for property <tt>clientIp</tt>.
+     *
+     * @param clientIp value to be assigned to property clientIp
+     */
+    public void setClientIp(String clientIp) {
+        this.clientIp = clientIp;
+    }
+    
+    @Override
+    public String toString() {
+        return "RequestMeta{" + "connectionId='" + connectionId + '\'' + ", clientIp='" + clientIp + '\''
+                + ", clientVersion='" + clientVersion + '\'' + ", labels=" + labels + '}';
+    }
+}

api/src/main/java/com/alibaba/nacos/api/remote/request/ServerCheckRequest.java

@@ -0,0 +1,27 @@
+/*
+ * Copyright 1999-2020 Alibaba Group Holding Ltd.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * 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.
+ */
+
+package com.alibaba.nacos.api.remote.request;
+
+/**
+ * request to check server if unimpeded.
+ *
+ * @author liuzunfei
+ * @version $Id: ServerCheckRequest.java, v 0.1 2020年07月22日 8:32 PM liuzunfei Exp $
+ */
+public class ServerCheckRequest extends InternalRequest {
+
+}

api/src/main/java/com/alibaba/nacos/api/remote/request/ServerLoaderInfoRequest.java

@@ -0,0 +1,28 @@
+/*
+ * Copyright 1999-2020 Alibaba Group Holding Ltd.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * 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.
+ */
+
+package com.alibaba.nacos.api.remote.request;
+
+/**
+ * get server node loader info.
+ * @author liuzunfei
+ * @version $Id: ServerLoaderInfoRequest.java, v 0.1 2020年09月03日 2:45 PM liuzunfei Exp $
+ */
+public class ServerLoaderInfoRequest extends InternalRequest {
+    
+    public ServerLoaderInfoRequest() {
+    }
+}

api/src/main/java/com/alibaba/nacos/api/remote/request/ServerReloadRequest.java

@@ -0,0 +1,56 @@
+/*
+ * Copyright 1999-2020 Alibaba Group Holding Ltd.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * 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.
+ */
+
+package com.alibaba.nacos.api.remote.request;
+
+/**
+ * reload long connection request.
+ *
+ * @author liuzunfei
+ * @version $Id: ServerReloadRequest.java, v 0.1 2020年11月09日 4:35 PM liuzunfei Exp $
+ */
+public class ServerReloadRequest extends InternalRequest {
+    
+    int reloadCount = 0;
+    
+    String reloadServer;
+    
+    /**
+     * Getter method for property <tt>reloadCount</tt>.
+     *
+     * @return property value of reloadCount
+     */
+    public int getReloadCount() {
+        return reloadCount;
+    }
+    
+    /**
+     * Setter method for property <tt>reloadCount</tt>.
+     *
+     * @param reloadCount value to be assigned to property reloadCount
+     */
+    public void setReloadCount(int reloadCount) {
+        this.reloadCount = reloadCount;
+    }
+    
+    public String getReloadServer() {
+        return reloadServer;
+    }
+    
+    public void setReloadServer(String reloadServer) {
+        this.reloadServer = reloadServer;
+    }
+}

api/src/main/java/com/alibaba/nacos/api/remote/request/ServerRequest.java

@@ -0,0 +1,28 @@
+/*
+ * Copyright 1999-2020 Alibaba Group Holding Ltd.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * 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.
+ */
+
+package com.alibaba.nacos.api.remote.request;
+
+/**
+ * ServerPushResponse.
+ *
+ * @author liuzunfei
+ * @version $Id: ServerPushResponse.java, v 0.1 2020年07月20日 1:21 PM liuzunfei Exp $
+ */
+@SuppressWarnings("PMD.AbstractClassShouldStartWithAbstractNamingRule")
+public abstract class ServerRequest extends Request {
+
+}

api/src/main/java/com/alibaba/nacos/api/remote/response/ClientDetectionResponse.java

@@ -0,0 +1,27 @@
+/*
+ * Copyright 1999-2020 Alibaba Group Holding Ltd.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * 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.
+ */
+
+package com.alibaba.nacos.api.remote.response;
+
+/**
+ * response of client active detection check.
+ *
+ * @author liuzunfei
+ * @version $Id: ServerCheckResponse.java, v 0.1 2021年01月20日 10:37 PM liuzunfei Exp $
+ */
+public class ClientDetectionResponse extends Response {
+
+}

api/src/main/java/com/alibaba/nacos/api/remote/response/ConnectResetResponse.java

@@ -0,0 +1,27 @@
+/*
+ * Copyright 1999-2020 Alibaba Group Holding Ltd.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * 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.
+ */
+
+package com.alibaba.nacos.api.remote.response;
+
+/**
+ * connection reset response.
+ *
+ * @author liuzunfei
+ * @version $Id: ConnectResetResponse.java, v 0.1 2020年09月01日 2:43 PM liuzunfei Exp $
+ */
+public class ConnectResetResponse extends Response {
+    
+}

api/src/main/java/com/alibaba/nacos/api/remote/response/ErrorResponse.java

@@ -0,0 +1,27 @@
+/*
+ * Copyright 1999-2020 Alibaba Group Holding Ltd.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * 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.
+ */
+
+package com.alibaba.nacos.api.remote.response;
+
+/**
+ * UnKnowResponse.
+ *
+ * @author liuzunfei
+ * @version $Id: UnKnowResponse.java, v 0.1 2020年07月16日 9:47 PM liuzunfei Exp $
+ */
+public class ErrorResponse extends Response {
+    
+}

api/src/main/java/com/alibaba/nacos/api/remote/response/HealthCheckResponse.java

@@ -0,0 +1,27 @@
+/*
+ * Copyright 1999-2020 Alibaba Group Holding Ltd.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * 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.
+ */
+
+package com.alibaba.nacos.api.remote.response;
+
+/**
+ * response of server check.
+ *
+ * @author liuzunfei
+ * @version $Id: ServerCheckResponse.java, v 0.1 2020年07月22日 8:37 PM liuzunfei Exp $
+ */
+public class HealthCheckResponse extends Response {
+    
+}

api/src/main/java/com/alibaba/nacos/api/remote/response/Response.java

@@ -0,0 +1,128 @@
+/*
+ * Copyright 1999-2020 Alibaba Group Holding Ltd.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * 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.
+ */
+
+package com.alibaba.nacos.api.remote.response;
+
+/**
+ * abstract response model via rpc channel.
+ *
+ * @author liuzunfei
+ * @version $Id: Response.java, v 0.1 2020年07月13日 6:03 PM liuzunfei Exp $
+ */
+@SuppressWarnings("PMD.AbstractClassShouldStartWithAbstractNamingRule")
+public abstract class Response {
+    
+    int resultCode = ResponseCode.SUCCESS.getCode();
+    
+    int errorCode;
+    
+    String message;
+    
+    String requestId;
+    
+    /**
+     * Getter method for property <tt>requestId</tt>.
+     *
+     * @return property value of requestId
+     */
+    public String getRequestId() {
+        return requestId;
+    }
+    
+    /**
+     * Setter method for property <tt>requestId</tt>.
+     *
+     * @param requestId value to be assigned to property requestId
+     */
+    public void setRequestId(String requestId) {
+        this.requestId = requestId;
+    }
+    
+    /**
+     * Check Response  is Successed.
+     *
+     * @return success or not.
+     */
+    public boolean isSuccess() {
+        return this.resultCode == ResponseCode.SUCCESS.getCode();
+    }
+    
+    /**
+     * Getter method for property <tt>resultCode</tt>.
+     *
+     * @return property value of resultCode
+     */
+    public int getResultCode() {
+        return resultCode;
+    }
+    
+    /**
+     * Setter method for property <tt>resultCode</tt>.
+     *
+     * @param resultCode value to be assigned to property resultCode
+     */
+    public void setResultCode(int resultCode) {
+        this.resultCode = resultCode;
+    }
+    
+    /**
+     * Getter method for property <tt>message</tt>.
+     *
+     * @return property value of message
+     */
+    public String getMessage() {
+        return message;
+    }
+    
+    /**
+     * Setter method for property <tt>message</tt>.
+     *
+     * @param message value to be assigned to property message
+     */
+    public void setMessage(String message) {
+        this.message = message;
+    }
+    
+    /**
+     * Getter method for property <tt>errorCode</tt>.
+     *
+     * @return property value of errorCode
+     */
+    public int getErrorCode() {
+        return errorCode;
+    }
+    
+    /**
+     * Setter method for property <tt>errorCode</tt>.
+     *
+     * @param errorCode value to be assigned to property errorCode
+     */
+    public void setErrorCode(int errorCode) {
+        this.errorCode = errorCode;
+    }
+    
+    public void setErrorInfo(int errorCode, String errorMsg) {
+        this.resultCode = ResponseCode.FAIL.getCode();
+        this.errorCode = errorCode;
+        this.message = errorMsg;
+    }
+    
+    @Override
+    public String toString() {
+        return "Response{" + "resultCode=" + resultCode + ", errorCode=" + errorCode + ", message='" + message + '\''
+                + ", requestId='" + requestId + '\'' + '}';
+    }
+}

api/src/main/java/com/alibaba/nacos/api/remote/response/ResponseCode.java

@@ -0,0 +1,81 @@
+/*
+ * Copyright 1999-2020 Alibaba Group Holding Ltd.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * 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.
+ */
+
+package com.alibaba.nacos.api.remote.response;
+
+/**
+ * ResponseCode.
+ *
+ * @author liuzunfei
+ * @version $Id: ResponseCode.java, v 0.1 2020年07月14日 2:04 PM liuzunfei Exp $
+ */
+public enum ResponseCode {
+    
+    /**
+     * Request success.
+     */
+    SUCCESS(200, "Response ok"),
+    
+    /**
+     * Request failed.
+     */
+    FAIL(500, "Response fail");
+    
+    int code;
+    
+    String desc;
+    
+    ResponseCode(int code, String desc) {
+        this.code = code;
+        this.desc = desc;
+    }
+    
+    /**
+     * Getter method for property <tt>code</tt>.
+     *
+     * @return property value of code
+     */
+    public int getCode() {
+        return code;
+    }
+    
+    /**
+     * Setter method for property <tt>code</tt>.
+     *
+     * @param code value to be assigned to property code
+     */
+    public void setCode(int code) {
+        this.code = code;
+    }
+    
+    /**
+     * Getter method for property <tt>desc</tt>.
+     *
+     * @return property value of desc
+     */
+    public String getDesc() {
+        return desc;
+    }
+    
+    /**
+     * Setter method for property <tt>desc</tt>.
+     *
+     * @param desc value to be assigned to property desc
+     */
+    public void setDesc(String desc) {
+        this.desc = desc;
+    }
+}

api/src/main/java/com/alibaba/nacos/api/remote/response/ServerCheckResponse.java

@@ -0,0 +1,44 @@
+/*
+ * Copyright 1999-2020 Alibaba Group Holding Ltd.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * 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.
+ */
+
+package com.alibaba.nacos.api.remote.response;
+
+/**
+ * response of server check.
+ *
+ * @author liuzunfei
+ * @version $Id: ServerCheckResponse.java, v 0.1 2020年07月22日 8:37 PM liuzunfei Exp $
+ */
+public class ServerCheckResponse extends Response {
+    
+    private String connectionId;
+    
+    public ServerCheckResponse() {
+    
+    }
+    
+    public ServerCheckResponse(String connectionId) {
+        this.connectionId = connectionId;
+    }
+    
+    public String getConnectionId() {
+        return connectionId;
+    }
+    
+    public void setConnectionId(String connectionId) {
+        this.connectionId = connectionId;
+    }
+}

api/src/main/java/com/alibaba/nacos/api/remote/response/ServerLoaderInfoResponse.java

@@ -0,0 +1,59 @@
+/*
+ * Copyright 1999-2020 Alibaba Group Holding Ltd.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * 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.
+ */
+
+package com.alibaba.nacos.api.remote.response;
+
+import java.util.HashMap;
+import java.util.Map;
+
+/**
+ * server loader info response.
+ *
+ * @author liuzunfei
+ * @version $Id: ServerLoaderInfoResponse.java, v 0.1 2020年09月03日 2:46 PM liuzunfei Exp $
+ */
+public class ServerLoaderInfoResponse extends Response {
+    
+    String address;
+    
+    Map<String, String> loaderMetrics = new HashMap<String, String>();
+    
+    public String getMetricsValue(String key) {
+        return loaderMetrics.get(key);
+    }
+    
+    public void putMetricsValue(String key, String value) {
+        this.loaderMetrics.put(key, value);
+    }
+    
+    /**
+     * Getter method for property <tt>loaderMetrics</tt>.
+     *
+     * @return property value of loaderMetrics
+     */
+    public Map<String, String> getLoaderMetrics() {
+        return loaderMetrics;
+    }
+    
+    /**
+     * Setter method for property <tt>loaderMetrics</tt>.
+     *
+     * @param loaderMetrics value to be assigned to property loaderMetrics
+     */
+    public void setLoaderMetrics(Map<String, String> loaderMetrics) {
+        this.loaderMetrics = loaderMetrics;
+    }
+}

api/src/main/java/com/alibaba/nacos/api/remote/response/ServerReloadResponse.java

@@ -0,0 +1,27 @@
+/*
+ * Copyright 1999-2020 Alibaba Group Holding Ltd.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * 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.
+ */
+
+package com.alibaba.nacos.api.remote.response;
+
+/**
+ * server reload response.
+ *
+ * @author liuzunfei
+ * @version $Id: ServerReloadResponse.java, v 0.1 2020年11月09日 4:37 PM liuzunfei Exp $
+ */
+public class ServerReloadResponse extends Response {
+    
+}

api/src/main/java/com/alibaba/nacos/api/selector/SelectorType.java

@@ -34,5 +34,17 @@ public enum SelectorType {
     /**
      * select by label.
      */
-    label
+    label,
+    /**
+     * select by cluster.
+     */
+    cluster,
+    /**
+     * select by health state.
+     */
+    health,
+    /**
+     * select by enable state.
+     */
+    enable
 }

api/src/main/java/com/alibaba/nacos/api/utils/NetUtils.java

@@ -0,0 +1,96 @@
+/*
+ * Copyright 1999-2020 Alibaba Group Holding Ltd.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * 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.
+ */
+
+package com.alibaba.nacos.api.utils;
+
+import java.io.IOException;
+import java.net.Inet4Address;
+import java.net.Inet6Address;
+import java.net.InetAddress;
+import java.net.NetworkInterface;
+import java.net.UnknownHostException;
+import java.util.Enumeration;
+
+/**
+ * Net utils.
+ *
+ * @author xuanyin.zy
+ */
+public class NetUtils {
+    
+    private static String localIp;
+    
+    /**
+     * Get local ip.
+     *
+     * @return local ip
+     */
+    public static String localIP() {
+        if (!StringUtils.isEmpty(localIp)) {
+            return localIp;
+        }
+        
+        String ip = System.getProperty("com.alibaba.nacos.client.naming.local.ip", findFirstNonLoopbackAddress());
+        
+        return localIp = ip;
+        
+    }
+    
+    private static String findFirstNonLoopbackAddress() {
+        InetAddress result = null;
+        
+        try {
+            int lowest = Integer.MAX_VALUE;
+            for (Enumeration<NetworkInterface> nics = NetworkInterface.getNetworkInterfaces();
+                    nics.hasMoreElements(); ) {
+                NetworkInterface ifc = nics.nextElement();
+                if (ifc.isUp()) {
+                    if (ifc.getIndex() < lowest || result == null) {
+                        lowest = ifc.getIndex();
+                    } else {
+                        continue;
+                    }
+                    
+                    for (Enumeration<InetAddress> addrs = ifc.getInetAddresses(); addrs.hasMoreElements(); ) {
+                        InetAddress address = addrs.nextElement();
+                        boolean isLegalIpVersion =
+                                Boolean.parseBoolean(System.getProperty("java.net.preferIPv6Addresses"))
+                                        ? address instanceof Inet6Address : address instanceof Inet4Address;
+                        if (isLegalIpVersion && !address.isLoopbackAddress()) {
+                            result = address;
+                        }
+                    }
+                    
+                }
+            }
+        } catch (IOException ex) {
+            //ignore
+        }
+        
+        if (result != null) {
+            return result.getHostAddress();
+        }
+        
+        try {
+            return InetAddress.getLocalHost().getHostAddress();
+        } catch (UnknownHostException e) {
+            //ignore
+        }
+        
+        return "resolve_failed";
+        
+    }
+}

api/src/main/proto/nacos_grpc_service.proto

@@ -0,0 +1,54 @@
+
+/*
+ * Copyright 1999-2020 Alibaba Group Holding Ltd.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * 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.
+ */
+
+syntax = "proto3";
+
+import "google/protobuf/any.proto";
+import "google/protobuf/timestamp.proto";
+
+option java_multiple_files = true;
+option java_package = "com.alibaba.nacos.api.grpc.auto";
+
+message Metadata {
+  string type = 3;
+  string clientIp = 8;
+  map<string, string> headers = 7;
+}
+
+
+message Payload {
+  Metadata metadata = 2;
+  google.protobuf.Any body = 3;
+}
+
+service RequestStream {
+  // build a streamRequest
+  rpc requestStream (Payload) returns (stream Payload) {
+  }
+}
+
+service Request {
+  // Sends a commonRequest
+  rpc request (Payload) returns (Payload) {
+  }
+}
+
+service BiRequestStream {
+  // Sends a commonRequest
+  rpc requestBiStream (stream Payload) returns (stream Payload) {
+  }
+}

api/src/test/java/com/alibaba/nacos/api/naming/ServerNamingAbilityTest.java

@@ -0,0 +1,60 @@
+/*
+ * Copyright 1999-2020 Alibaba Group Holding Ltd.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * 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.
+ */
+
+package com.alibaba.nacos.api.naming;
+
+import com.fasterxml.jackson.annotation.JsonInclude;
+import com.fasterxml.jackson.core.JsonProcessingException;
+import com.fasterxml.jackson.databind.DeserializationFeature;
+import com.fasterxml.jackson.databind.ObjectMapper;
+import org.junit.BeforeClass;
+import org.junit.Test;
+
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertFalse;
+import static org.junit.Assert.assertNotEquals;
+
+public class ServerNamingAbilityTest {
+    
+    private static ObjectMapper jacksonMapper;
+    
+    @BeforeClass
+    public static void setUpClass() throws Exception {
+        jacksonMapper = new ObjectMapper();
+        jacksonMapper.disable(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES);
+        jacksonMapper.setSerializationInclusion(JsonInclude.Include.NON_NULL);
+    }
+    
+    @Test
+    public void testDeserializeServerNamingAbilityForNonExistItem() throws JsonProcessingException {
+        String nonExistItemJson = "{\"exampleAbility\":false}";
+        ServerNamingAbility actual = jacksonMapper.readValue(nonExistItemJson, ServerNamingAbility.class);
+        assertFalse(actual.isSupportJraft());
+    }
+    
+    @Test
+    public void testEquals() throws JsonProcessingException {
+        ServerNamingAbility expected = new ServerNamingAbility();
+        expected.setSupportJraft(true);
+        String serializeJson = jacksonMapper.writeValueAsString(expected);
+        ServerNamingAbility actual = jacksonMapper.readValue(serializeJson, ServerNamingAbility.class);
+        assertEquals(expected, actual);
+        actual = new ServerNamingAbility();
+        assertNotEquals(expected, actual);
+        actual.setSupportJraft(true);
+        assertEquals(expected, actual);
+    }
+}

api/src/test/java/com/alibaba/nacos/api/naming/pojo/healthcheck/TestChecker.java

@@ -24,6 +24,8 @@ public class TestChecker extends AbstractHealthChecker {
     @JsonTypeInfo(use = Id.NAME, property = "type")
     public static final String TYPE = "TEST";
     
+    private static final long serialVersionUID = 2472091207760970225L;
+    
     private String testValue;
     
     public String getTestValue() {

auth/src/main/java/com/alibaba/nacos/auth/AuthManager.java

@@ -38,6 +38,15 @@ public interface AuthManager {
      */
     User login(Object request) throws AccessException;
     
+    /**
+     * Authentication of request, identify the user who request the resource.
+     *
+     * @param request where we can find the user information
+     * @return user related to this request, null if no user info is found.
+     * @throws AccessException if authentication is failed
+     */
+    User loginRemote(Object request) throws AccessException;
+    
     /**
      * Authorization of request, constituted with resource and user.
      *

auth/src/main/java/com/alibaba/nacos/auth/common/AuthSystemTypes.java

@@ -28,5 +28,9 @@ public enum AuthSystemTypes {
     /**
      * Nacos builtin auth system.
      */
-    NACOS
+    NACOS,
+    /**
+     * LDAP.
+     */
+    LDAP
 }

client/pom.xml

@@ -64,13 +64,14 @@
         <dependency>
             <groupId>${project.groupId}</groupId>
             <artifactId>nacos-common</artifactId>
+            <optional>true</optional>
         </dependency>
         
         <dependency>
             <groupId>${project.groupId}</groupId>
             <artifactId>nacos-api</artifactId>
+            <optional>true</optional>
         </dependency>
-        
         <dependency>
             <groupId>ch.qos.logback</groupId>
             <artifactId>logback-classic</artifactId>
@@ -83,11 +84,6 @@
             <optional>true</optional>
         </dependency>
         
-        <dependency>
-            <groupId>com.google.guava</groupId>
-            <artifactId>guava</artifactId>
-        </dependency>
-        
         <dependency>
             <artifactId>commons-codec</artifactId>
             <groupId>commons-codec</groupId>
@@ -103,6 +99,14 @@
             <artifactId>jackson-databind</artifactId>
         </dependency>
         
+        <dependency>
+            <groupId>org.apache.httpcomponents</groupId>
+            <artifactId>httpasyncclient</artifactId>
+        </dependency>
+        <dependency>
+            <groupId>org.reflections</groupId>
+            <artifactId>reflections</artifactId>
+        </dependency>
         <dependency>
             <groupId>net.jcip</groupId>
             <artifactId>jcip-annotations</artifactId>
@@ -117,7 +121,6 @@
             <groupId>org.yaml</groupId>
             <artifactId>snakeyaml</artifactId>
         </dependency>
-    
     </dependencies>
     
     <build>
@@ -126,10 +129,223 @@
                 <groupId>org.apache.maven.plugins</groupId>
                 <artifactId>maven-compiler-plugin</artifactId>
                 <configuration>
-                    <source>6</source>
-                    <target>6</target>
+                    <source>8</source>
+                    <target>8</target>
                 </configuration>
             </plugin>
         </plugins>
     </build>
+    
+    <profiles>
+        <profile>
+            <id>release-sign-artifacts</id>
+            <build>
+                <plugins>
+                    <plugin>
+                        <groupId>org.apache.maven.plugins</groupId>
+                        <artifactId>maven-shade-plugin</artifactId>
+                        <version>3.2.1</version>
+                        <configuration>
+                            <createDependencyReducedPom>false</createDependencyReducedPom>
+                        </configuration>
+                        <executions>
+                            <execution>
+                                <phase>package</phase>
+                                <goals>
+                                    <goal>shade</goal>
+                                </goals>
+                                <configuration>
+                                    <keepDependenciesWithProvidedScope>false</keepDependenciesWithProvidedScope>
+                                    <promoteTransitiveDependencies>true</promoteTransitiveDependencies>
+                                    <createDependencyReducedPom>false</createDependencyReducedPom>
+                                    <minimizeJar>false</minimizeJar>
+                                    <createSourcesJar>true</createSourcesJar>
+                                    <shadeSourcesContent>true</shadeSourcesContent>
+                    
+                                    <artifactSet>
+                                        <includes>
+                                            <include>io.grpc:*</include>
+                                            <include>io.opencensus:*</include>
+                                            <include>io.perfmark:*</include>
+                                            <include>com.google.guava:guava</include>
+                                            <include>com.google.guava:failureaccess</include>
+                                            <include>com.google.errorprone:error_prone_annotations</include>
+                                            <include>com.google.j2objc:j2objc-annotations</include>
+                                            <include>com.google.code.gson:gson</include>
+                                            <include>com.google.protobuf:protobuf-java</include>
+                                            <include>com.alibaba.nacos:nacos-api</include>
+                                            <include>com.alibaba.nacos:nacos-common</include>
+                                            <include>org.checkerframework:checker-qual</include>
+                                        </includes>
+                                    </artifactSet>
+                    
+                                    <relocations>
+                        
+                                        <relocation>
+                                            <pattern>io.grpc</pattern>
+                                            <shadedPattern>com.alibaba.nacos.shaded.io.grpc</shadedPattern>
+                                            <excludes>
+                                                <exclude>io.grpc.netty.shaded.io.grpc.netty.*</exclude>
+                                            </excludes>
+                                        </relocation>
+                                        <relocation>
+                                            <pattern>io.grpc.netty.shaded.io.grpc.netty</pattern>
+                                            <shadedPattern>com.alibaba.nacos.shaded.io.grpc.netty.shaded.io.grpc.netty
+                                            </shadedPattern>
+                                            <includes>
+                                                <include>io.grpc.netty.shaded.io.grpc.netty.*</include>
+                                            </includes>
+                                        </relocation>
+                        
+                                        <relocation>
+                                            <pattern>com.google</pattern>
+                                            <shadedPattern>com.alibaba.nacos.shaded.com.google</shadedPattern>
+                                        </relocation>
+                                        <relocation>
+                                            <pattern>io.perfmark</pattern>
+                                            <shadedPattern>com.alibaba.nacos.shaded.io.perfmark</shadedPattern>
+                                        </relocation>
+                                        <relocation>
+                                            <pattern>io.opencensus</pattern>
+                                            <shadedPattern>com.alibaba.nacos.shaded.io.opencensus</shadedPattern>
+                                        </relocation>
+                                        <relocation>
+                                            <pattern>org.codehaus</pattern>
+                                            <shadedPattern>com.alibaba.nacos.shaded.org.codehaus</shadedPattern>
+                                        </relocation>
+                                        <relocation>
+                                            <pattern>org.checkerframework</pattern>
+                                            <shadedPattern>com.alibaba.nacos.shaded.org.checkerframework</shadedPattern>
+                                        </relocation>
+                                        <relocation>
+                                            <pattern>android.annotation</pattern>
+                                            <shadedPattern>com.alibaba.nacos.shaded.android.annotation</shadedPattern>
+                                        </relocation>
+                                        <relocation>
+                                            <pattern>org.example</pattern>
+                                            <shadedPattern>com.alibaba.nacos.shaded.org.example</shadedPattern>
+                                        </relocation>
+                    
+                    
+                                    </relocations>
+                                    <transformers>
+                                        <transformer
+                                            implementation="org.apache.maven.plugins.shade.resource.ManifestResourceTransformer"/>
+                                        <transformer
+                                            implementation="org.apache.maven.plugins.shade.resource.ServicesResourceTransformer"/>
+                    
+                                    </transformers>
+                                </configuration>
+                            </execution>
+                        </executions>
+                    </plugin>
+                </plugins>
+            </build>
+        </profile>
+        <profile>
+            <id>release-nacos</id>
+            <build>
+                <plugins>
+                    <plugin>
+                        <groupId>org.apache.maven.plugins</groupId>
+                        <artifactId>maven-shade-plugin</artifactId>
+                        <version>3.2.1</version>
+                        <configuration>
+                            <createDependencyReducedPom>false</createDependencyReducedPom>
+                        </configuration>
+                        <executions>
+                            <execution>
+                                <phase>package</phase>
+                                <goals>
+                                    <goal>shade</goal>
+                                </goals>
+                                <configuration>
+                                    <keepDependenciesWithProvidedScope>false</keepDependenciesWithProvidedScope>
+                                    <promoteTransitiveDependencies>true</promoteTransitiveDependencies>
+                                    <createDependencyReducedPom>false</createDependencyReducedPom>
+                                    <minimizeJar>false</minimizeJar>
+                                    <createSourcesJar>true</createSourcesJar>
+                                    <shadeSourcesContent>true</shadeSourcesContent>
+                                
+                                    <artifactSet>
+                                        <includes>
+                                            <include>io.grpc:*</include>
+                                            <include>io.opencensus:*</include>
+                                            <include>io.perfmark:*</include>
+                                            <include>com.google.guava:guava</include>
+                                            <include>com.google.guava:failureaccess</include>
+                                            <include>com.google.errorprone:error_prone_annotations</include>
+                                            <include>com.google.j2objc:j2objc-annotations</include>
+                                            <include>com.google.code.gson:gson</include>
+                                            <include>com.google.protobuf:protobuf-java</include>
+                                            <include>com.alibaba.nacos:nacos-api</include>
+                                            <include>com.alibaba.nacos:nacos-common</include>
+                                            <include>org.checkerframework:checker-qual</include>
+                                        </includes>
+                                    </artifactSet>
+                                
+                                    <relocations>
+                                    
+                                        <relocation>
+                                            <pattern>io.grpc</pattern>
+                                            <shadedPattern>com.alibaba.nacos.shaded.io.grpc</shadedPattern>
+                                            <excludes>
+                                                <exclude>io.grpc.netty.shaded.io.grpc.netty.*</exclude>
+                                            </excludes>
+                                        </relocation>
+                                        <relocation>
+                                            <pattern>io.grpc.netty.shaded.io.grpc.netty</pattern>
+                                            <shadedPattern>com.alibaba.nacos.shaded.io.grpc.netty.shaded.io.grpc.netty
+                                            </shadedPattern>
+                                            <includes>
+                                                <include>io.grpc.netty.shaded.io.grpc.netty.*</include>
+                                            </includes>
+                                        </relocation>
+                                    
+                                        <relocation>
+                                            <pattern>com.google</pattern>
+                                            <shadedPattern>com.alibaba.nacos.shaded.com.google</shadedPattern>
+                                        </relocation>
+                                        <relocation>
+                                            <pattern>io.perfmark</pattern>
+                                            <shadedPattern>com.alibaba.nacos.shaded.io.perfmark</shadedPattern>
+                                        </relocation>
+                                        <relocation>
+                                            <pattern>io.opencensus</pattern>
+                                            <shadedPattern>com.alibaba.nacos.shaded.io.opencensus</shadedPattern>
+                                        </relocation>
+                                        <relocation>
+                                            <pattern>org.codehaus</pattern>
+                                            <shadedPattern>com.alibaba.nacos.shaded.org.codehaus</shadedPattern>
+                                        </relocation>
+                                        <relocation>
+                                            <pattern>org.checkerframework</pattern>
+                                            <shadedPattern>com.alibaba.nacos.shaded.org.checkerframework</shadedPattern>
+                                        </relocation>
+                                        <relocation>
+                                            <pattern>android.annotation</pattern>
+                                            <shadedPattern>com.alibaba.nacos.shaded.android.annotation</shadedPattern>
+                                        </relocation>
+                                        <relocation>
+                                            <pattern>org.example</pattern>
+                                            <shadedPattern>com.alibaba.nacos.shaded.org.example</shadedPattern>
+                                        </relocation>
+                                
+                                
+                                    </relocations>
+                                    <transformers>
+                                        <transformer
+                                            implementation="org.apache.maven.plugins.shade.resource.ManifestResourceTransformer"/>
+                                        <transformer
+                                            implementation="org.apache.maven.plugins.shade.resource.ServicesResourceTransformer"/>
+                                
+                                    </transformers>
+                                </configuration>
+                            </execution>
+                        </executions>
+                    </plugin>
+                </plugins>
+            </build>
+        </profile>
+    </profiles>
 </project>

client/src/main/java/com/alibaba/nacos/client/config/NacosConfigService.java

@@ -25,25 +25,20 @@ import com.alibaba.nacos.api.exception.NacosException;
 import com.alibaba.nacos.client.config.filter.impl.ConfigFilterChainManager;
 import com.alibaba.nacos.client.config.filter.impl.ConfigRequest;
 import com.alibaba.nacos.client.config.filter.impl.ConfigResponse;
-import com.alibaba.nacos.client.config.http.HttpAgent;
-import com.alibaba.nacos.client.config.http.MetricsHttpAgent;
 import com.alibaba.nacos.client.config.http.ServerHttpAgent;
 import com.alibaba.nacos.client.config.impl.ClientWorker;
 import com.alibaba.nacos.client.config.impl.LocalConfigInfoProcessor;
 import com.alibaba.nacos.client.config.impl.LocalEncryptedDataKeyProcessor;
+import com.alibaba.nacos.client.config.impl.ServerListManager;
 import com.alibaba.nacos.client.config.utils.ContentUtils;
 import com.alibaba.nacos.client.config.utils.ParamUtils;
 import com.alibaba.nacos.client.utils.LogUtils;
 import com.alibaba.nacos.client.utils.ParamUtil;
 import com.alibaba.nacos.client.utils.ValidatorUtils;
-import com.alibaba.nacos.common.http.HttpRestResult;
 import com.alibaba.nacos.common.utils.StringUtils;
 import org.slf4j.Logger;
 
-import java.net.HttpURLConnection;
 import java.util.Arrays;
-import java.util.HashMap;
-import java.util.Map;
 import java.util.Properties;
 
 /**
@@ -56,12 +51,11 @@ public class NacosConfigService implements ConfigService {
     
     private static final Logger LOGGER = LogUtils.logger(NacosConfigService.class);
     
-    private static final long POST_TIMEOUT = 3000L;
-    
     /**
-     * http agent.
+     * will be deleted in 2.0 later versions
      */
-    private final HttpAgent agent;
+    @Deprecated
+    ServerHttpAgent agent = null;
     
     /**
      * long polling.
@@ -70,24 +64,20 @@ public class NacosConfigService implements ConfigService {
     
     private String namespace;
     
-    private final String encode;
-    
     private final ConfigFilterChainManager configFilterChainManager;
     
     public NacosConfigService(Properties properties) throws NacosException {
         ValidatorUtils.checkInitParam(properties);
-        String encodeTmp = properties.getProperty(PropertyKeyConst.ENCODE);
-        if (StringUtils.isBlank(encodeTmp)) {
-            this.encode = Constants.ENCODE;
-        } else {
-            this.encode = encodeTmp.trim();
-        }
+        
         initNamespace(properties);
         this.configFilterChainManager = new ConfigFilterChainManager(properties);
+        ServerListManager serverListManager = new ServerListManager(properties);
+        serverListManager.start();
+        
+        this.worker = new ClientWorker(this.configFilterChainManager, serverListManager, properties);
+        // will be deleted in 2.0 later versions
+        agent = new ServerHttpAgent(serverListManager);
         
-        this.agent = new MetricsHttpAgent(new ServerHttpAgent(properties));
-        this.agent.start();
-        this.worker = new ClientWorker(this.agent, this.configFilterChainManager, properties);
     }
     
     private void initNamespace(Properties properties) {
@@ -120,7 +110,19 @@ public class NacosConfigService implements ConfigService {
     
     @Override
     public boolean publishConfig(String dataId, String group, String content, String type) throws NacosException {
-        return publishConfigInner(namespace, dataId, group, null, null, null, content, type);
+        return publishConfigInner(namespace, dataId, group, null, null, null, content, type, null);
+    }
+    
+    @Override
+    public boolean publishConfigCas(String dataId, String group, String content, String casMd5) throws NacosException {
+        return publishConfigInner(namespace, dataId, group, null, null, null, content,
+                ConfigType.getDefaultType().getType(), casMd5);
+    }
+    
+    @Override
+    public boolean publishConfigCas(String dataId, String group, String content, String casMd5, String type)
+            throws NacosException {
+        return publishConfigInner(namespace, dataId, group, null, null, null, content, type, casMd5);
     }
     
     @Override
@@ -143,10 +145,10 @@ public class NacosConfigService implements ConfigService {
         cr.setGroup(group);
         
         // 优先使用本地配置
-        String content = LocalConfigInfoProcessor.getFailover(agent.getName(), dataId, group, tenant);
+        String content = LocalConfigInfoProcessor.getFailover(worker.getAgentName(), dataId, group, tenant);
         if (content != null) {
-            LOGGER.warn("[{}] [get-config] get failover ok, dataId={}, group={}, tenant={}, config={}", agent.getName(),
-                    dataId, group, tenant, ContentUtils.truncateContent(content));
+            LOGGER.warn("[{}] [get-config] get failover ok, dataId={}, group={}, tenant={}, config={}",
+                    worker.getAgentName(), dataId, group, tenant, ContentUtils.truncateContent(content));
             cr.setContent(content);
             String encryptedDataKey = LocalEncryptedDataKeyProcessor
                     .getEncryptDataKeyFailover(agent.getName(), dataId, group, tenant);
@@ -157,10 +159,9 @@ public class NacosConfigService implements ConfigService {
         }
         
         try {
-            ConfigResponse response = worker.getServerConfig(dataId, group, tenant, timeoutMs);
+            ConfigResponse response = worker.getServerConfig(dataId, group, tenant, timeoutMs, false);
             cr.setContent(response.getContent());
             cr.setEncryptedDataKey(response.getEncryptedDataKey());
-            
             configFilterChainManager.doFilter(null, cr);
             content = cr.getContent();
             
@@ -170,12 +171,12 @@ public class NacosConfigService implements ConfigService {
                 throw ioe;
             }
             LOGGER.warn("[{}] [get-config] get from server error, dataId={}, group={}, tenant={}, msg={}",
-                    agent.getName(), dataId, group, tenant, ioe.toString());
+                    worker.getAgentName(), dataId, group, tenant, ioe.toString());
         }
         
-        LOGGER.warn("[{}] [get-config] get snapshot ok, dataId={}, group={}, tenant={}, config={}", agent.getName(),
-                dataId, group, tenant, ContentUtils.truncateContent(content));
-        content = LocalConfigInfoProcessor.getSnapshot(agent.getName(), dataId, group, tenant);
+        LOGGER.warn("[{}] [get-config] get snapshot ok, dataId={}, group={}, tenant={}, config={}",
+                worker.getAgentName(), dataId, group, tenant, ContentUtils.truncateContent(content));
+        content = LocalConfigInfoProcessor.getSnapshot(worker.getAgentName(), dataId, group, tenant);
         cr.setContent(content);
         String encryptedDataKey = LocalEncryptedDataKeyProcessor
                 .getEncryptDataKeyFailover(agent.getName(), dataId, group, tenant);
@@ -192,41 +193,11 @@ public class NacosConfigService implements ConfigService {
     private boolean removeConfigInner(String tenant, String dataId, String group, String tag) throws NacosException {
         group = blank2defaultGroup(group);
         ParamUtils.checkKeyParam(dataId, group);
-        String url = Constants.CONFIG_CONTROLLER_PATH;
-        Map<String, String> params = new HashMap<String, String>(4);
-        params.put("dataId", dataId);
-        params.put("group", group);
-        
-        if (StringUtils.isNotEmpty(tenant)) {
-            params.put("tenant", tenant);
-        }
-        if (StringUtils.isNotEmpty(tag)) {
-            params.put("tag", tag);
-        }
-        HttpRestResult<String> result = null;
-        try {
-            result = agent.httpDelete(url, null, params, encode, POST_TIMEOUT);
-        } catch (Exception ex) {
-            LOGGER.warn("[remove] error, " + dataId + ", " + group + ", " + tenant + ", msg: " + ex.toString());
-            return false;
-        }
-        
-        if (result.ok()) {
-            LOGGER.info("[{}] [remove] ok, dataId={}, group={}, tenant={}", agent.getName(), dataId, group, tenant);
-            return true;
-        } else if (HttpURLConnection.HTTP_FORBIDDEN == result.getCode()) {
-            LOGGER.warn("[{}] [remove] error, dataId={}, group={}, tenant={}, code={}, msg={}", agent.getName(), dataId,
-                    group, tenant, result.getCode(), result.getMessage());
-            throw new NacosException(result.getCode(), result.getMessage());
-        } else {
-            LOGGER.warn("[{}] [remove] error, dataId={}, group={}, tenant={}, code={}, msg={}", agent.getName(), dataId,
-                    group, tenant, result.getCode(), result.getMessage());
-            return false;
-        }
+        return worker.removeConfig(dataId, group, tenant, tag);
     }
     
     private boolean publishConfigInner(String tenant, String dataId, String group, String tag, String appName,
-            String betaIps, String content, String type) throws NacosException {
+            String betaIps, String content, String type, String casMd5) throws NacosException {
         group = blank2defaultGroup(group);
         ParamUtils.checkParam(dataId, group, content);
         
@@ -235,56 +206,13 @@ public class NacosConfigService implements ConfigService {
         cr.setTenant(tenant);
         cr.setGroup(group);
         cr.setContent(content);
+        cr.setType(type);
         configFilterChainManager.doFilter(cr, null);
         content = cr.getContent();
+        String encryptedDataKey = (String) cr.getParameter("encryptedDataKey");
         
-        String url = Constants.CONFIG_CONTROLLER_PATH;
-        Map<String, String> params = new HashMap<String, String>(6);
-        params.put("dataId", dataId);
-        params.put("group", group);
-        params.put("content", content);
-        params.put("type", type);
-        if (StringUtils.isNotEmpty(tenant)) {
-            params.put("tenant", tenant);
-        }
-        if (StringUtils.isNotEmpty(appName)) {
-            params.put("appName", appName);
-        }
-        if (StringUtils.isNotEmpty(tag)) {
-            params.put("tag", tag);
-        }
-        String dataKey = (String) cr.getParameter("encryptedDataKey");
-        if (StringUtils.isNotEmpty(dataKey)) {
-            params.put("encryptedDataKey", dataKey);
-        }
-        Map<String, String> headers = new HashMap<String, String>(1);
-        if (StringUtils.isNotEmpty(betaIps)) {
-            headers.put("betaIps", betaIps);
-        }
-        
-        HttpRestResult<String> result = null;
-        try {
-            result = agent.httpPost(url, headers, params, encode, POST_TIMEOUT);
-        } catch (Exception ex) {
-            LOGGER.warn("[{}] [publish-single] exception, dataId={}, group={}, msg={}", agent.getName(), dataId, group,
-                    ex.toString());
-            return false;
-        }
-        
-        if (result.ok()) {
-            LOGGER.info("[{}] [publish-single] ok, dataId={}, group={}, tenant={}, config={}", agent.getName(), dataId,
-                    group, tenant, ContentUtils.truncateContent(content));
-            return true;
-        } else if (HttpURLConnection.HTTP_FORBIDDEN == result.getCode()) {
-            LOGGER.warn("[{}] [publish-single] error, dataId={}, group={}, tenant={}, code={}, msg={}", agent.getName(),
-                    dataId, group, tenant, result.getCode(), result.getMessage());
-            throw new NacosException(result.getCode(), result.getMessage());
-        } else {
-            LOGGER.warn("[{}] [publish-single] error, dataId={}, group={}, tenant={}, code={}, msg={}", agent.getName(),
-                    dataId, group, tenant, result.getCode(), result.getMessage());
-            return false;
-        }
-        
+        return worker
+                .publishConfig(dataId, group, tenant, appName, tag, betaIps, content, encryptedDataKey, casMd5, type);
     }
     
     @Override
@@ -298,7 +226,6 @@ public class NacosConfigService implements ConfigService {
     
     @Override
     public void shutDown() throws NacosException {
-        agent.shutdown();
         worker.shutdown();
     }
 }

client/src/main/java/com/alibaba/nacos/client/config/filter/impl/ConfigFilterChainManager.java

@@ -21,8 +21,8 @@ import com.alibaba.nacos.api.config.filter.IConfigFilterChain;
 import com.alibaba.nacos.api.config.filter.IConfigRequest;
 import com.alibaba.nacos.api.config.filter.IConfigResponse;
 import com.alibaba.nacos.api.exception.NacosException;
-import com.google.common.collect.Lists;
 
+import java.util.ArrayList;
 import java.util.List;
 import java.util.Properties;
 import java.util.ServiceLoader;
@@ -34,7 +34,7 @@ import java.util.ServiceLoader;
  */
 public class ConfigFilterChainManager implements IConfigFilterChain {
     
-    private final List<IConfigFilter> filters = Lists.newArrayList();
+    private final List<IConfigFilter> filters = new ArrayList<IConfigFilter>();
     
     public ConfigFilterChainManager(Properties properties) {
         ServiceLoader<IConfigFilter> configFilters = ServiceLoader.load(IConfigFilter.class);