content: /*
   * 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.core.remote;
  
  import com.alibaba.nacos.api.exception.NacosException;
  import com.alibaba.nacos.api.remote.AbstractRequestCallBack;
  import com.alibaba.nacos.api.remote.request.ServerRequest;
  import com.alibaba.nacos.api.remote.PushCallBack;
  import com.alibaba.nacos.api.remote.response.Response;
  import com.alibaba.nacos.common.remote.exception.ConnectionAlreadyClosedException;
  import com.alibaba.nacos.core.utils.Loggers;
  import org.springframework.beans.factory.annotation.Autowired;
  import org.springframework.stereotype.Service;
  
  import java.util.concurrent.Executor;
  
  /**
   * push response  to clients.
   *
   * @author liuzunfei
   * @version $Id: PushService.java, v 0.1 2020年07月20日 1:12 PM liuzunfei Exp $
   */
  @Service
  public class RpcPushService {
      
      @Autowired
      private ConnectionManager connectionManager;
      
      /**
       * push response with no ack.
       *
       * @param connectionId    connectionId.
       * @param request         request.
       * @param requestCallBack requestCallBack.
       */
      public void pushWithCallback(String connectionId, ServerRequest request, PushCallBack requestCallBack,
              Executor executor) {
          Connection connection = connectionManager.getConnection(connectionId);
          if (connection != null) {
              try {
                  connection.asyncRequest(request, new AbstractRequestCallBack(requestCallBack.getTimeout()) {
                      
                      @Override
                      public Executor getExecutor() {
                          return executor;
                      }
                      
                      @Override
                      public void onResponse(Response response) {
                          if (response.isSuccess()) {
                              requestCallBack.onSuccess();
                          } else {
                              requestCallBack.onFail(new NacosException(response.getErrorCode(), response.getMessage()));
                          }
                      }
                      
                      @Override
                      public void onException(Throwable e) {
                          requestCallBack.onFail(e);
                      }
                  });
              } catch (ConnectionAlreadyClosedException e) {
                  connectionManager.unregister(connectionId);
                  requestCallBack.onSuccess();
              } catch (Exception e) {
                  Loggers.REMOTE_DIGEST
                          .error("error to send push response to connectionId ={},push response={}", connectionId,
                                  request, e);
                  requestCallBack.onFail(e);
              }
          } else {
              requestCallBack.onSuccess();
          }
      }
      
      /**
       * push response with no ack.
       *
       * @param connectionId connectionId.
       * @param request      request.
       */
      public void pushWithoutAck(String connectionId, ServerRequest request) {
          Connection connection = connectionManager.getConnection(connectionId);
          if (connection != null) {
              try {
                  connection.request(request, 3000L);
              } catch (ConnectionAlreadyClosedException e) {
                  connectionManager.unregister(connectionId);
              } catch (Exception e) {
                  Loggers.REMOTE_DIGEST
                          .error("error to send push response to connectionId ={},push response={}", connectionId,
                                  request, e);
              }
          }
      }
      
  }
  