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
   * <p/>
   * http://www.apache.org/licenses/LICENSE-2.0
   * <p/>
   * 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.Map;
  import java.util.Objects;
  import java.util.SortedMap;
  import java.util.TreeMap;
  
  import org.apache.ambari.server.agent.stomp.dto.Hashable;
  import org.apache.ambari.server.agent.stomp.dto.TopologyCluster;
  
  import com.fasterxml.jackson.annotation.JsonInclude;
  import com.fasterxml.jackson.annotation.JsonProperty;
  
  /**
   * Contains info about clusters topology update. This update will be sent to all subscribed recipients.
   * Is used to messaging to UI.
   */
  @JsonInclude(JsonInclude.Include.NON_NULL)
  public class TopologyUpdateEvent extends STOMPEvent implements Hashable {
  
    /**
     * Map of clusters topologies by cluster ids.
     */
    @JsonProperty("clusters")
    private final SortedMap<String, TopologyCluster> clusters;
  
    /**
     * Actual version hash.
     */
    private String hash;
  
    /**
     * Type of update, is used to differ full current topology (CREATE), adding new or update existing topology
     * elements (UPDATE) and removing existing topology elements (DELETE).
     */
    private final UpdateEventType eventType;
  
    public TopologyUpdateEvent(SortedMap<String, TopologyCluster> clusters, UpdateEventType eventType) {
      this(Type.UI_TOPOLOGY, clusters, null, eventType);
    }
  
    public TopologyUpdateEvent(Type type, SortedMap<String, TopologyCluster> clusters, String hash, UpdateEventType eventType) {
      super(type);
      this.clusters = clusters;
      this.hash = hash;
      this.eventType = eventType;
    }
  
    public SortedMap<String, TopologyCluster> getClusters() {
      return clusters;
    }
  
    public TopologyUpdateEvent deepCopy() {
      SortedMap<String, TopologyCluster> copiedClusters = new TreeMap<>();
      for (Map.Entry<String, TopologyCluster> topologyClusterEntry : getClusters().entrySet()) {
        copiedClusters.put(topologyClusterEntry.getKey(), topologyClusterEntry.getValue().deepCopyCluster());
      }
      TopologyUpdateEvent copiedEvent = new TopologyUpdateEvent(copiedClusters, getEventType());
      copiedEvent.setHash(getHash());
      return copiedEvent;
    }
  
    public UpdateEventType getEventType() {
      return eventType;
    }
  
    @Override
    public String getHash() {
      return hash;
    }
  
    @Override
    public void setHash(String hash) {
      this.hash = hash;
    }
  
    public static TopologyUpdateEvent emptyUpdate() {
      return new TopologyUpdateEvent(null, null);
    }
  
    @Override
    public boolean equals(Object o) {
      if (this == o) return true;
      if (o == null || getClass() != o.getClass()) return false;
  
      TopologyUpdateEvent that = (TopologyUpdateEvent) o;
  
      return Objects.equals(eventType, that.eventType) &&
        Objects.equals(clusters, that.clusters);
    }
  
    @Override
    public int hashCode() {
      return Objects.hash(clusters, eventType);
    }
  }
  