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.view.cluster;
  
  import java.util.List;
  import java.util.Map;
  
  /**
   * View associated cluster.  A cluster may be associated with a view instance so that the view instance may pull
   * configuration values from the cluster.
   */
  public interface Cluster {
    /**
     * Get the cluster name.
     *
     * @return the cluster name
     */
    public String getName();
  
    /**
     * Get a value for the given configuration type and key.
     *
     * @param type  the configuration id  (i.e. hdfs-site)
     * @param key   the configuration key (i.e. dfs.namenode.http-address)
     *
     * @return the configuration value
     */
    public String getConfigurationValue(String type, String key);
  
    /**
     * @param type : the type (site) for which the configurations are required.
     * @return : return a map containing all the key values of configurations
     */
    public Map<String,String> getConfigByType(String type);
    /**
     * Get the hosts for service and componet
     *
     * @param serviceName
     * @param componentName
     * @return list of hosts
     */
    public List<String> getHostsForServiceComponent(String serviceName, String componentName);
  }
  