content: /*
   * 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.istio.common;
  
  import io.grpc.stub.StreamObserver;
  
  import java.util.HashMap;
  import java.util.Map;
  import java.util.concurrent.atomic.AtomicLong;
  
  /**
   * AbstractConnection maintains the life cycle of the connection.
   *
   * @author special.fy
   */
  public abstract class AbstractConnection<MessageT> {
  
      private static AtomicLong connectIdGenerator = new AtomicLong(0);
  
      private String connectionId;
  
      protected StreamObserver<MessageT> streamObserver;
  
      private final Map<String, WatchedStatus> watchedResources;
  
      public AbstractConnection(StreamObserver<MessageT> streamObserver) {
          this.streamObserver = streamObserver;
          this.watchedResources = new HashMap<>(1 << 4);
      }
  
      public void setConnectionId(String clientId) {
          long id = connectIdGenerator.getAndIncrement();
          this.connectionId = clientId + "-" + id;
      }
  
      public String getConnectionId() {
          return connectionId;
      }
  
      public void addWatchedResource(String resourceType, WatchedStatus watchedStatus) {
          watchedResources.put(resourceType, watchedStatus);
      }
  
      public WatchedStatus getWatchedStatusByType(String resourceType) {
          return watchedResources.get(resourceType);
      }
  
      /**
       * Push data to grpc connection.
       *
       * @param message response
       * @param watchedStatus watched status
       */
      public abstract void push(MessageT message, WatchedStatus watchedStatus);
  }
  