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.view;
  
  import java.util.ArrayList;
  import java.util.List;
  import java.util.Map;
  
  import org.apache.ambari.server.state.Config;
  import org.apache.ambari.server.state.ServiceComponentHost;
  import org.apache.ambari.view.cluster.Cluster;
  
  import com.google.common.collect.ImmutableMap;
  
  /**
   * View associated cluster implementation.
   */
  public class ClusterImpl implements Cluster {
  
    /**
     * The associated Ambari cluster.
     */
    private final org.apache.ambari.server.state.Cluster cluster;
  
  
    // ----- Constructors ------------------------------------------------------
  
    /**
     * Create a view associated cluster from an Ambari cluster.
     *
     * @param cluster  the Ambari cluster
     */
    public ClusterImpl(org.apache.ambari.server.state.Cluster cluster) {
      this.cluster = cluster;
    }
  
  
    // ----- Cluster -----------------------------------------------------------
  
    @Override
    public String getName() {
      return cluster.getClusterName();
    }
  
    @Override
    public String getConfigurationValue(String type, String key) {
  
      Config config = cluster.getDesiredConfigByType(type);
  
      return config == null ? null : config.getProperties().get(key);
    }
  
    @Override
    public Map<String, String> getConfigByType(String type) {
      Config configs = cluster.getDesiredConfigByType(type);
      return ImmutableMap.copyOf(configs.getProperties());
    }
  
    @Override
    public List<String> getHostsForServiceComponent(String serviceName, String componentName){
      List<ServiceComponentHost> serviceComponentHosts = cluster.getServiceComponentHosts(serviceName, componentName);
      List<String> hosts = new ArrayList<>();
      for (ServiceComponentHost serviceComponentHost : serviceComponentHosts) {
        hosts.add(serviceComponentHost.getHostName());
      }
      return hosts;
    }
  
  }
  