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.controller.metrics.timeline.cache;
  
  import java.util.Set;
  
  import org.apache.ambari.server.controller.spi.TemporalInfo;
  
  /**
   * Cache contents represent metrics for an App / Cluster.
   * This is designed to work on the premise that a client makes same requests
   * over and over, so this caching strategy allows us to send a http request
   * for multiple metrics in the same query and ensure parallelization on the
   * metrics backend side as well.
   */
  public class TimelineAppMetricCacheKey {
    private final Set<String> metricNames;
    private final String appId;
    private final String hostNames;
    private String spec;
    private TemporalInfo temporalInfo;
  
    public TimelineAppMetricCacheKey(Set<String> metricNames, String appId,
                                     String hostNames, TemporalInfo temporalInfo) {
      this.metricNames = metricNames;
      this.appId = appId;
      this.hostNames = hostNames;
      this.temporalInfo = temporalInfo;
    }
  
    public TimelineAppMetricCacheKey(Set<String> metricNames, String appId,
                                     TemporalInfo temporalInfo) {
      this(metricNames, appId, null, temporalInfo);
    }
  
    public Set<String> getMetricNames() {
      return metricNames;
    }
  
    /**
     * Temporal info is used to calculate the next query window,
     * it does not contribute to the key behavior.
     * @return @TemporalInfo
     */
    public TemporalInfo getTemporalInfo() {
      return temporalInfo;
    }
  
    /**
     * Set temporalInfo to new query window each time.
     * @param temporalInfo @TemporalInfo
     */
    public void setTemporalInfo(TemporalInfo temporalInfo) {
      this.temporalInfo = temporalInfo;
    }
  
    public String getAppId() {
      return appId;
    }
  
    public String getHostNames() {
      return hostNames;
    }
  
    /**
     * Actual http request Uri, this does not contribute to the key behavior,
     * it is used solely for interoperability between @AMSPropertyProvider.MetricsRequest
     * and the Cache.
     * @return Request Uri
     */
    public String getSpec() {
      return spec;
    }
  
    /**
     * Set spec string.
     * @param spec Request Uri
     */
    public void setSpec(String spec) {
      this.spec = spec;
    }
  
    @Override
    public boolean equals(Object o) {
      if (this == o) return true;
      if (o == null || getClass() != o.getClass()) return false;
  
      TimelineAppMetricCacheKey that = (TimelineAppMetricCacheKey) o;
  
      if (!metricNames.equals(that.metricNames)) return false;
      if (!appId.equals(that.appId)) return false;
      return !(hostNames != null ? !hostNames.equals(that.hostNames) : that.hostNames != null);
  
    }
  
    @Override
    public int hashCode() {
      int result = metricNames.hashCode();
      result = 31 * result + appId.hashCode();
      result = 31 * result + (hostNames != null ? hostNames.hashCode() : 0);
      return result;
    }
  
    @Override
    public String toString() {
      return "TimelineAppMetricCacheKey{" +
        "metricNames=" + metricNames +
        ", appId='" + appId + '\'' +
        ", hostNames=" + hostNames +
        ", spec='" + spec + '\'' +
        '}';
    }
  }
  