package com.linkedin.helix.mock.controller;
import java.util.concurrent.CountDownLatch;
import org.apache.log4j.Logger;
import com.linkedin.helix.HelixManager;
import com.linkedin.helix.HelixManagerFactory;
import com.linkedin.helix.InstanceType;
import com.linkedin.helix.ZkHelixTestManager;
import com.linkedin.helix.controller.HelixControllerMain;
import com.linkedin.helix.manager.zk.ZKHelixManager;
import com.linkedin.helix.participant.DistClusterControllerStateModelFactory;
import com.linkedin.helix.participant.StateMachineEngine;
public class ClusterController extends Thread
{
private static Logger LOG =
Logger.getLogger(ClusterController.class);
private final CountDownLatch _startCountDown = new CountDownLatch(1);
private final CountDownLatch _stopCountDown = new CountDownLatch(1);
private final CountDownLatch _waitStopFinishCountDown = new CountDownLatch(1);
private final String _controllerMode;
private final String _zkAddr;
private ZkHelixTestManager _manager;
public ClusterController(String clusterName, String controllerName, String zkAddr) throws Exception
{
this(clusterName, controllerName, zkAddr, HelixControllerMain.STANDALONE.toString());
}
public ClusterController(String clusterName,
String controllerName,
String zkAddr,
String controllerMode) throws Exception
{
_controllerMode = controllerMode;
_zkAddr = zkAddr;
if (_controllerMode.equals(HelixControllerMain.STANDALONE.toString()))
{
_manager = new ZkHelixTestManager(clusterName, controllerName, InstanceType.CONTROLLER, zkAddr);
// HelixManagerFactory.getZKHelixManager(clusterName,
// controllerName,
// InstanceType.CONTROLLER,
// zkAddr);
}
else if (_controllerMode.equals(HelixControllerMain.DISTRIBUTED.toString()))
{
_manager = new ZkHelixTestManager(clusterName, controllerName, InstanceType.CONTROLLER_PARTICIPANT, zkAddr);
// HelixManagerFactory.getZKHelixManager(clusterName,
// controllerName,
// InstanceType.CONTROLLER_PARTICIPANT,
// zkAddr);
}
else
{
throw new IllegalArgumentException("Controller mode: " + controllerMode
+ " NOT recoginized");
}
}
public ZkHelixTestManager getManager()
{
return _manager;
}
public void syncStop()
{
if (_manager == null)
{
LOG.warn("manager already stopped");
return;
}
_stopCountDown.countDown();
try
{
_waitStopFinishCountDown.await();
}
catch (InterruptedException e)
{
// TODO Auto-generated catch block
e.printStackTrace();
}
}
public void syncStart()
{
// TODO: prevent start multiple times
super.start();
try
{
_startCountDown.await();
}
catch (InterruptedException e)
{
// TODO Auto-generated catch block
e.printStackTrace();
}
}
@Override
public void run()
{
try
{
try
{
if (_controllerMode.equals(HelixControllerMain.STANDALONE.toString()))
{
_manager.connect();
}
else if (_controllerMode.equals(HelixControllerMain.DISTRIBUTED.toString()))
{
DistClusterControllerStateModelFactory stateModelFactory =
new DistClusterControllerStateModelFactory(_zkAddr);
StateMachineEngine stateMach = _manager.getStateMachineEngine();
stateMach.registerStateModelFactory("LeaderStandby", stateModelFactory);
_manager.connect();
}
}
catch (Exception e)
{
// TODO Auto-generated catch block
e.printStackTrace();
}
finally
{
_startCountDown.countDown();
_stopCountDown.await();
}
}
catch (Exception e)
{
// TODO Auto-generated catch block
e.printStackTrace();
}
finally
{
synchronized (_manager)
{
_manager.disconnect();
_manager = null;
}
_waitStopFinishCountDown.countDown();
}
}
}