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.state;
  
  import java.util.HashMap;
  import java.util.Map;
  
  public class RefreshCommandConfiguration {
  
    public static final String RELOAD_CONFIGS = "reload_configs";
    public static final String REFRESH_CONFIGS = "refresh_configs";
  
    private Map<String, Map<String, String>> propertyComponentCommandMap;
  
    public RefreshCommandConfiguration() {
    }
  
    private String findKey(String propertyName) {
      for (String keyName : propertyComponentCommandMap.keySet()) {
        if (propertyName.startsWith(keyName)) {
          return keyName;
        }
      }
      return null;
    }
  
    /**
     * If no command is defined for a component then the default command will be REFRESH_CONFIGS in case of a client component or
     * if there's only one command defined for an another component. This is because if RELOAD_CONFIGS is defined for NAMENODE then
     * presumably other dependent components will need just a refresh.
     */
    public String getRefreshCommandForComponent(ServiceComponentHost sch, String propertyName) {
      if (sch.isClientComponent()) {
        return REFRESH_CONFIGS;
      }
      String keyName = findKey(propertyName);
      Map<String, String> componentCommandMap = propertyComponentCommandMap.get(keyName);
      if (componentCommandMap != null) {
        String commandForComponent = componentCommandMap.get(sch.getServiceComponentName());
        if (commandForComponent != null) {
          return commandForComponent;
        } else if(componentCommandMap.size() == 1) {
          return REFRESH_CONFIGS;
        }
      }
      return null;
    }
  
    public void addRefreshCommands(Map<String, Map<String, String>> refreshCommands) {
      if (propertyComponentCommandMap == null) {
        propertyComponentCommandMap = new HashMap();
      }
      propertyComponentCommandMap.putAll(refreshCommands);
    }
  
  }
  