1.server side client connection listener optimize 2. listen context a…

…nd notifier updated . (#3385)

* Add gprc support-> client reconnection optimize

* Add gprc support-> 1.client connection listener optimize  2.listen context an notifier updated .

* Add gprc support->merge problem fix

* Add gprc support->check style fixed.

* Add gprc support->check style fixed and remove  gRpc classes in source package.

api/pom.xml

@@ -41,24 +41,24 @@
  </plugin>
 
  <!-- 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:3.3.0:exe:osx-x86_64</protocArtifact>-->
- <!--<pluginId>grpc-java</pluginId>-->
- <!--<pluginArtifact>io.grpc:protoc-gen-grpc-java:1.20.0:exe:osx-x86_64</pluginArtifact>-->
- <!--</configuration>-->
- <!--<executions>-->
- <!--<execution>-->
- <!--<goals>-->
- <!--<goal>compile</goal>-->
- <!--<goal>compile-custom</goal>-->
- <!--</goals>-->
- <!--</execution>-->
- <!--</executions>-->
- <!--</plugin>-->
+ <plugin>
+  <groupId>org.xolstice.maven.plugins</groupId>
+  <artifactId>protobuf-maven-plugin</artifactId>
+  <version>0.5.0</version>
+  <configuration>
+  <protocArtifact>com.google.protobuf:protoc:3.3.0:exe:osx-x86_64</protocArtifact>
+  <pluginId>grpc-java</pluginId>
+  <pluginArtifact>io.grpc:protoc-gen-grpc-java:1.20.0:exe:osx-x86_64</pluginArtifact>
+  </configuration>
+  <executions>
+  <execution>
+  <goals>
+  <goal>compile</goal>
+  <goal>compile-custom</goal>
+  </goals>
+  </execution>
+  </executions>
+ </plugin>
  </plugins>
  </build>
 

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

@@ -16,15 +16,13 @@
 
 package com.alibaba.nacos.api.config.remote.request;
 
-
 /**
  * ConfigChangeListenRequest.
  * @author liuzunfei
  * @version $Id: ConfigChangeListenRequest.java, v 0.1 2020年07月13日 9:01 PM liuzunfei Exp $
  */
 public class ConfigChangeListenRequest extends ConfigCommonRequest {
 
-
  private static final String LISTEN = "listen";
 
  private static final String UNLISTEN = "unlisten";
@@ -37,7 +35,6 @@ public class ConfigChangeListenRequest extends ConfigCommonRequest {
 
  private String operation = LISTEN;
 
-
  public boolean isCancelListen() {
  return UNLISTEN.equals(this.operation);
  }

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

@@ -16,25 +16,21 @@
 
 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 com.alibaba.nacos.api.remote.response.ServerPushResponse;
 
 /**
+ * ConfigChangeNotifyResponse.
  * @author liuzunfei
  * @version $Id: ConfigChangeNotifyResponse.java, v 0.1 2020年07月14日 3:20 PM liuzunfei Exp $
  */
-public class ConfigChangeNotifyResponse extends Response {
+public class ConfigChangeNotifyResponse extends ServerPushResponse {
 
  private String dataId;
 
  private String group;
 
  private String tenant;
 
- public ConfigChangeNotifyResponse() {
-
- }
-
  @Override
  public String getType() {
  return ConfigResponseTypeConstants.CONFIG_CHANGE_NOTIFY;

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

@@ -61,8 +61,8 @@ public void addLabel(String key, String value) {
  /**
  * Buid fail response.
  *
- * @param errorCode
- * @param message
+ * @param errorCode errorCode.
+ * @param message message.
  * @return
  */
  public static ConfigQueryResponse buildFailResponse(int errorCode, String message) {