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()));
}
}