/**
* Copyright (C) 2012 LinkedIn Inc <opensource@linkedin.com>
*
* Licensed 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 com.linkedin.helix.integration;
import java.util.Map;
import java.util.logging.Level;
import org.I0Itec.zkclient.ZkServer;
import org.apache.log4j.Logger;
import org.testng.Assert;
import org.testng.AssertJUnit;
import org.testng.annotations.AfterSuite;
import org.testng.annotations.BeforeSuite;
import com.linkedin.helix.ConfigAccessor;
import com.linkedin.helix.ConfigScope;
import com.linkedin.helix.ConfigScopeBuilder;
import com.linkedin.helix.PropertyKey.Builder;
import com.linkedin.helix.TestHelper;
import com.linkedin.helix.TestHelper.StartCMResult;
import com.linkedin.helix.manager.zk.ZKHelixDataAccessor;
import com.linkedin.helix.manager.zk.ZNRecordSerializer;
import com.linkedin.helix.manager.zk.ZkBaseDataAccessor;
import com.linkedin.helix.manager.zk.ZkClient;
import com.linkedin.helix.model.LiveInstance;
import com.linkedin.helix.tools.ClusterSetup;
import com.linkedin.helix.util.ZKClientPool;
public class ZkIntegrationTestBase
{
private static Logger LOG =
Logger.getLogger(ZkIntegrationTestBase.class);
protected static ZkServer _zkServer;
protected static ZkClient _gZkClient;
protected static ClusterSetup _gSetupTool;
public static final String ZK_ADDR = "localhost:2183";
protected static final String CLUSTER_PREFIX = "CLUSTER";
protected static final String CONTROLLER_CLUSTER_PREFIX = "CONTROLLER_CLUSTER";
protected final String CONTROLLER_PREFIX = "controller";
protected final String PARTICIPANT_PREFIX = "localhost";
@BeforeSuite
public void beforeSuite() throws Exception
{
// TODO: use logging.properties file to config java.util.logging.Logger levels
java.util.logging.Logger topJavaLogger = java.util.logging.Logger.getLogger("");
topJavaLogger.setLevel(Level.WARNING);
_zkServer = TestHelper.startZkSever(ZK_ADDR);
AssertJUnit.assertTrue(_zkServer != null);
ZKClientPool.reset();
_gZkClient = new ZkClient(ZK_ADDR);
_gZkClient.setZkSerializer(new ZNRecordSerializer());
_gSetupTool = new ClusterSetup(ZK_ADDR);
}
@AfterSuite
public void afterSuite()
{
ZKClientPool.reset();
TestHelper.stopZkServer(_zkServer);
_gZkClient.close();
}
protected String getShortClassName()
{
String className = this.getClass().getName();
return className.substring(className.lastIndexOf('.') + 1);
}
protected String getCurrentLeader(ZkClient zkClient, String clusterName)
{
ZKHelixDataAccessor accessor =
new ZKHelixDataAccessor(clusterName, new ZkBaseDataAccessor(zkClient));
Builder keyBuilder = accessor.keyBuilder();
LiveInstance leader = accessor.getProperty(keyBuilder.controllerLeader());
if (leader == null)
{
return null;
}
return leader.getInstanceName();
}
/**
* Stop current leader and returns the new leader
*
* @param zkClient
* @param clusterName
* @param startCMResultMap
* @return
*/
protected String stopCurrentLeader(ZkClient zkClient,
String clusterName,
Map<String, StartCMResult> startCMResultMap)
{
String leader = getCurrentLeader(zkClient, clusterName);
Assert.assertTrue(leader != null);
System.out.println("stop leader: " + leader + " in " + clusterName);
Assert.assertTrue(leader != null);
StartCMResult result = startCMResultMap.remove(leader);
Assert.assertTrue(result._manager != null);
result._manager.disconnect();
Assert.assertTrue(result._thread != null);
result._thread.interrupt();
boolean isNewLeaderElected = false;
String newLeader = null;
try
{
for (int i = 0; i < 5; i++)
{
Thread.sleep(1000);
newLeader = getCurrentLeader(zkClient, clusterName);
if (!newLeader.equals(leader))
{
isNewLeaderElected = true;
System.out.println("new leader elected: " + newLeader + " in " + clusterName);
break;
}
}
}
catch (InterruptedException e)
{
e.printStackTrace();
}
if (isNewLeaderElected == false)
{
System.out.println("fail to elect a new leader in " + clusterName);
}
AssertJUnit.assertTrue(isNewLeaderElected);
return newLeader;
}
protected void enableHealthCheck(String clusterName)
{
ConfigScope scope = new ConfigScopeBuilder().forCluster(clusterName).build();
new ConfigAccessor(_gZkClient).set(scope, "healthChange" + ".enabled", "" + true);
}
}