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.events.listeners.upgrade;
  
  import org.apache.ambari.server.EagerSingleton;
  import org.apache.ambari.server.events.RequestUpdateEvent;
  import org.apache.ambari.server.events.UpgradeUpdateEvent;
  import org.apache.ambari.server.events.publishers.STOMPUpdatePublisher;
  import org.apache.ambari.server.orm.dao.HostRoleCommandDAO;
  import org.apache.ambari.server.orm.dao.RequestDAO;
  import org.apache.ambari.server.orm.dao.UpgradeDAO;
  import org.apache.ambari.server.orm.entities.UpgradeEntity;
  
  import com.google.common.eventbus.Subscribe;
  import com.google.inject.Inject;
  import com.google.inject.Singleton;
  
  @Singleton
  @EagerSingleton
  public class UpgradeUpdateListener {
  
    private STOMPUpdatePublisher STOMPUpdatePublisher;
  
    @Inject
    private UpgradeDAO upgradeDAO;
  
    @Inject
    private HostRoleCommandDAO hostRoleCommandDAO;
  
    @Inject
    private RequestDAO requestDAO;
  
    @Inject
    public UpgradeUpdateListener(STOMPUpdatePublisher STOMPUpdatePublisher) {
      STOMPUpdatePublisher.registerAPI(this);
  
      this.STOMPUpdatePublisher = STOMPUpdatePublisher;
    }
  
    @Subscribe
    public void onRequestUpdate(RequestUpdateEvent requestUpdateEvent) {
      UpgradeEntity upgradeEntity = upgradeDAO.findUpgradeByRequestId(requestUpdateEvent.getRequestId());
      if (upgradeEntity != null) {
        STOMPUpdatePublisher.publish(UpgradeUpdateEvent.formUpdateEvent(hostRoleCommandDAO, requestDAO, upgradeEntity));
      }
    }
  }
  