content: /**
   * Licensed to the Apache Software Foundation (ASF) under one
   * or more contributor license agreements.  See the NOTICE file
   * distributed with this work for additional information
   * regarding copyright ownership.  The ASF licenses this file
   * to you 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 org.apache.ambari.server.api.stomp;
  
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  import org.springframework.beans.factory.annotation.Autowired;
  import org.springframework.context.event.EventListener;
  import org.springframework.messaging.MessageHeaders;
  import org.springframework.stereotype.Component;
  import org.springframework.web.socket.messaging.SessionDisconnectEvent;
  import org.springframework.web.socket.messaging.SessionSubscribeEvent;
  import org.springframework.web.socket.messaging.SessionUnsubscribeEvent;
  
  @Component
  public class NamedTasksSubscribeListener {
    private static Logger LOG = LoggerFactory.getLogger(NamedTasksSubscribeListener.class);
  
    @Autowired
    private NamedTasksSubscriptions namedTasksSubscriptions;
  
    @EventListener
    public void subscribe(SessionSubscribeEvent sse)
    {
      MessageHeaders msgHeaders = sse.getMessage().getHeaders();
      String sessionId  = (String) msgHeaders.get("simpSessionId");
      String destination  = (String) msgHeaders.get("simpDestination");
      String id  = (String) msgHeaders.get("simpSubscriptionId");
      if (sessionId != null && destination != null && id != null) {
        namedTasksSubscriptions.addDestination(sessionId, destination, id);
      }
      LOG.debug(String.format("API subscribe was arrived with sessionId = %s, destination = %s and id = %s",
          sessionId, destination, id));
    }
  
    @EventListener
    public void unsubscribe(SessionUnsubscribeEvent suse)
    {
      MessageHeaders msgHeaders = suse.getMessage().getHeaders();
      String sessionId  = (String) msgHeaders.get("simpSessionId");
      String id  = (String) msgHeaders.get("simpSubscriptionId");
      if (sessionId != null && id != null) {
        namedTasksSubscriptions.removeId(sessionId, id);
      }
      LOG.debug(String.format("API unsubscribe was arrived with sessionId = %s and id = %s",
          sessionId, id));
    }
  
    @EventListener
    public void disconnect(SessionDisconnectEvent sde)
    {
      MessageHeaders msgHeaders = sde.getMessage().getHeaders();
      String sessionId  = (String) msgHeaders.get("simpSessionId");
      if (sessionId != null) {
        namedTasksSubscriptions.removeSession(sessionId);
      }
      LOG.debug(String.format("API disconnect was arrived with sessionId = %s",
          sessionId));
    }
  }
  