package org.apache.helix.integration;
   
   /*
    * 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.Date;
  import java.util.concurrent.atomic.AtomicReference;
  
  import org.apache.helix.NotificationContext;
  import org.apache.helix.TestHelper;
  import org.apache.helix.controller.HelixControllerMain;
  import org.apache.helix.mock.participant.MockParticipant;
  import org.apache.helix.mock.participant.MockTransition;
  import org.apache.helix.model.Message;
  import org.apache.helix.tools.ClusterStateVerifier;
  import org.apache.helix.tools.ClusterStateVerifier.BestPossAndExtViewZkVerifier;
  import org.testng.Assert;
  import org.testng.annotations.Test;
  
  
  public class TestRestartParticipant extends ZkIntegrationTestBase
  {
    public class KillOtherTransition extends MockTransition
    {
      final AtomicReference<MockParticipant> _other;
  
      public KillOtherTransition(MockParticipant other)
      {
        _other = new AtomicReference<MockParticipant>(other);
      }
  
      @Override
      public void doTransition(Message message, NotificationContext context)
      {
        MockParticipant other = _other.getAndSet(null);
        if (other != null)
        {
          System.err.println("Kill " + other.getInstanceName()
              + ". Interrupted exceptions are IGNORABLE");
          other.syncStop();
        }
      }
    }
  
    @Test()
    public void testRestartParticipant() throws Exception
    {
      // Logger.getRootLogger().setLevel(Level.INFO);
      System.out.println("START testRestartParticipant at "
          + new Date(System.currentTimeMillis()));
  
      String clusterName = getShortClassName();
      MockParticipant[] participants = new MockParticipant[5];
  
      TestHelper.setupCluster(clusterName, ZK_ADDR, 12918, // participant port
                              "localhost", // participant name prefix
                              "TestDB", // resource name prefix
                              1, // resources
                              10, // partitions per resource
                              5, // number of nodes
                              3, // replicas
                              "MasterSlave",
                              true); // do rebalance
  
      TestHelper.startController(clusterName,
                                 "controller_0",
                                 ZK_ADDR,
                                 HelixControllerMain.STANDALONE);
      // start participants
      for (int i = 0; i < 5; i++)
      {
        String instanceName = "localhost_" + (12918 + i);
  
        if (i == 4)
        {
          participants[i] =
              new MockParticipant(clusterName,
                                  instanceName,
                                  ZK_ADDR,
                                  new KillOtherTransition(participants[0]));
        }
        else
        {
         participants[i] =
             new MockParticipant(clusterName,
                                 instanceName,
                                 ZK_ADDR,
                                 null);
 //        Thread.sleep(100);
       }
 
       participants[i].syncStart();
     }
 
     boolean result =
         ClusterStateVerifier.verifyByZkCallback(new BestPossAndExtViewZkVerifier(ZK_ADDR,
                                                                                  clusterName));
     Assert.assertTrue(result);
 
     // restart
     Thread.sleep(500);
     MockParticipant participant =
         new MockParticipant(participants[0].getClusterName(),
                             participants[0].getInstanceName(),
                             ZK_ADDR,
                             null);
     System.err.println("Restart " + participant.getInstanceName());
     participant.syncStart();
     result =
         ClusterStateVerifier.verifyByZkCallback(new BestPossAndExtViewZkVerifier(ZK_ADDR,
                                                                                  clusterName));
     Assert.assertTrue(result);
 
     System.out.println("START testRestartParticipant at "
         + new Date(System.currentTimeMillis()));
 
   }
 }