package org.apache.helix.filestore;
   
   /*
    * 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.
   */
  
  import java.util.List;
  
  import org.apache.helix.HelixManager;
  import org.apache.helix.HelixManagerFactory;
  import org.apache.helix.InstanceType;
  import org.apache.helix.manager.zk.ZKHelixAdmin;
  import org.apache.helix.manager.zk.ZNRecordSerializer;
  import org.apache.helix.manager.zk.ZkClient;
  import org.apache.helix.model.InstanceConfig;
  import org.apache.helix.participant.StateMachineEngine;
  
  public class FileStore
  {
    private final String _zkAddr;
    private final String _clusterName;
    private final String _serverId;
    private HelixManager _manager = null;
  
    public FileStore(String zkAddr, String clusterName, String serverId)
    {
      _zkAddr = zkAddr;
      _clusterName = clusterName;
      _serverId = serverId;
    }
  
    public void connect()
    {
      try
      {
        _manager =
            HelixManagerFactory.getZKHelixManager(_clusterName,
                                                  _serverId,
                                                  InstanceType.PARTICIPANT,
                                                  _zkAddr);
  
        StateMachineEngine stateMach = _manager.getStateMachineEngine();
        FileStoreStateModelFactory modelFactory =
            new FileStoreStateModelFactory(_manager);
        stateMach.registerStateModelFactory(SetupCluster.DEFAULT_STATE_MODEL, modelFactory);
        _manager.connect();
  //      _manager.addExternalViewChangeListener(replicator);
        Thread.currentThread().join();
      }
      catch (InterruptedException e)
      {
        System.err.println(" [-] " + _serverId + " is interrupted ...");
      }
      catch (Exception e)
      {
        e.printStackTrace();
      }
      finally
      {
        disconnect();
      }
    }
  
    public void disconnect()
    {
      if (_manager != null)
      {
        _manager.disconnect();
      }
    }
  
    public static void main(String[] args) throws Exception
    {
      if (args.length < 2)
      {
        System.err.println("USAGE: java FileStore zookeeperAddress(e.g. localhost:2181) serverId(host_port)");
        System.exit(1);
      }
  
      final String zkAddr = args[0];
      final String clusterName = SetupCluster.DEFAULT_CLUSTER_NAME;
      final String serverId = args[1];
  
      ZkClient zkclient = null;
     try
     {
       // start consumer
       final FileStore store =
           new FileStore(zkAddr, clusterName, serverId);
 
       Runtime.getRuntime().addShutdownHook(new Thread()
       {
         @Override
         public void run()
         {
           System.out.println("Shutting down server:" + serverId);
           store.disconnect();
         }
       });
       store.connect();
     }
     finally
     {
       if (zkclient != null)
       {
         zkclient.close();
       }
     }
   }
 }