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;
  
  import java.util.Collections;
  import java.util.Set;
  
  /**
   * The {@link HostsRemovedEvent} class is fired when the hosts are removed from the
   * cluster.
   */
  public class HostsRemovedEvent extends AmbariEvent {
  
    private final Set<Long> hostIds;
    private final Set<String> hosts;
  
    public HostsRemovedEvent(Set<String> hosts, Set<Long> hostIds) {
      super(AmbariEventType.HOST_REMOVED);
      this.hostIds = hostIds != null ? hostIds : Collections.emptySet();
      this.hosts = hosts != null ? hosts : Collections.emptySet();
    }
  
    /**
     * @return names of removed hosts
     */
    public Set<String> getHostNames() {
      return hosts;
    }
  
    /**
     * @return ids of removed hosts
     */
    public Set<Long> getHostIds() {
      return hostIds;
    }
  
    @Override
    public String toString() {
      return "HostsRemovedEvent{" + hosts + "}";
    }
  }
  