package org.apache.helix.participant;
/*
* 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 org.apache.helix.HelixManager;
import org.apache.helix.InstanceType;
import org.apache.helix.NotificationContext;
import org.apache.helix.PropertyPathConfig;
import org.apache.helix.PropertyType;
import org.apache.helix.TestHelper;
import org.apache.helix.ZNRecord;
import org.apache.helix.ZkUnitTestBase;
import org.apache.helix.PropertyKey.Builder;
import org.apache.helix.manager.zk.ZKHelixDataAccessor;
import org.apache.helix.manager.zk.ZkBaseDataAccessor;
import org.apache.helix.model.LiveInstance;
import org.apache.helix.participant.DistClusterControllerElection;
import org.apache.log4j.Logger;
import org.testng.AssertJUnit;
import org.testng.annotations.Test;
public class TestDistControllerElection extends ZkUnitTestBase
{
private static Logger LOG = Logger.getLogger(TestDistControllerElection.class);
@Test()
public void testController() throws Exception
{
System.out.println("START TestDistControllerElection at "
+ new Date(System.currentTimeMillis()));
String className = getShortClassName();
final String clusterName = CLUSTER_PREFIX + "_" + className + "_" + "testController";
String path = "/" + clusterName;
if (_gZkClient.exists(path))
{
_gZkClient.deleteRecursive(path);
}
ZKHelixDataAccessor accessor = new ZKHelixDataAccessor(clusterName, new ZkBaseDataAccessor(_gZkClient));
Builder keyBuilder = accessor.keyBuilder();
TestHelper.setupEmptyCluster(_gZkClient, clusterName);
final String controllerName = "controller_0";
HelixManager manager = new MockZKHelixManager(clusterName, controllerName,
InstanceType.CONTROLLER,
_gZkClient);
DistClusterControllerElection election = new DistClusterControllerElection(ZK_ADDR);
NotificationContext context = new NotificationContext(manager);
context.setType(NotificationContext.Type.INIT);
election.onControllerChange(context);
// path = PropertyPathConfig.getPath(PropertyType.LEADER, clusterName);
// ZNRecord leaderRecord = _gZkClient.<ZNRecord> readData(path);
LiveInstance liveInstance = accessor.getProperty(keyBuilder.controllerLeader());
AssertJUnit.assertEquals(controllerName, liveInstance.getInstanceName());
// AssertJUnit.assertNotNull(election.getController());
// AssertJUnit.assertNull(election.getLeader());
manager = new MockZKHelixManager(clusterName, "controller_1", InstanceType.CONTROLLER,
_gZkClient);
election = new DistClusterControllerElection(ZK_ADDR);
context = new NotificationContext(manager);
context.setType(NotificationContext.Type.INIT);
election.onControllerChange(context);
// leaderRecord = _gZkClient.<ZNRecord> readData(path);
liveInstance = accessor.getProperty(keyBuilder.controllerLeader());
AssertJUnit.assertEquals(controllerName, liveInstance.getInstanceName());
// AssertJUnit.assertNull(election.getController());
// AssertJUnit.assertNull(election.getLeader());
System.out.println("END TestDistControllerElection at " + new Date(System.currentTimeMillis()));
}
@Test()
public void testControllerParticipant() throws Exception
{
String className = getShortClassName();
LOG.info("RUN " + className + " at " + new Date(System.currentTimeMillis()));
final String clusterName = CONTROLLER_CLUSTER_PREFIX + "_" + className + "_"
+ "testControllerParticipant";
String path = "/" + clusterName;
if (_gZkClient.exists(path))
{
_gZkClient.deleteRecursive(path);
}
ZKHelixDataAccessor accessor = new ZKHelixDataAccessor(clusterName, new ZkBaseDataAccessor(_gZkClient));
Builder keyBuilder = accessor.keyBuilder();
TestHelper.setupEmptyCluster(_gZkClient, clusterName);
final String controllerName = "controller_0";
HelixManager manager = new MockZKHelixManager(clusterName, controllerName,
InstanceType.CONTROLLER_PARTICIPANT,
_gZkClient);
DistClusterControllerElection election = new DistClusterControllerElection(ZK_ADDR);
NotificationContext context = new NotificationContext(manager);
context.setType(NotificationContext.Type.CALLBACK);
election.onControllerChange(context);
LiveInstance liveInstance = accessor.getProperty(keyBuilder.controllerLeader());
AssertJUnit.assertEquals(controllerName, liveInstance.getInstanceName());
// path = PropertyPathConfig.getPath(PropertyType.LEADER, clusterName);
// ZNRecord leaderRecord = _gZkClient.<ZNRecord> readData(path);
// AssertJUnit.assertEquals(controllerName, leaderRecord.getSimpleField("LEADER"));
// AssertJUnit.assertNotNull(election.getController());
// AssertJUnit.assertNotNull(election.getLeader());
manager = new MockZKHelixManager(clusterName, "controller_1",
InstanceType.CONTROLLER_PARTICIPANT,
_gZkClient);
election = new DistClusterControllerElection(ZK_ADDR);
context = new NotificationContext(manager);
context.setType(NotificationContext.Type.CALLBACK);
election.onControllerChange(context);
liveInstance = accessor.getProperty(keyBuilder.controllerLeader());
AssertJUnit.assertEquals(controllerName, liveInstance.getInstanceName());
// leaderRecord = _gZkClient.<ZNRecord> readData(path);
// AssertJUnit.assertEquals(controllerName, leaderRecord.getSimpleField("LEADER"));
// AssertJUnit.assertNull(election.getController());
// AssertJUnit.assertNull(election.getLeader());
LOG.info("END " + getShortClassName() + " at " + new Date(System.currentTimeMillis()));
}
@Test()
public void testParticipant() throws Exception
{
String className = getShortClassName();
LOG.info("RUN " + className + " at " + new Date(System.currentTimeMillis()));
final String clusterName = CLUSTER_PREFIX + "_" + className + "_" + "testParticipant";
String path = "/" + clusterName;
if (_gZkClient.exists(path))
{
_gZkClient.deleteRecursive(path);
}
TestHelper.setupEmptyCluster(_gZkClient, clusterName);
final String controllerName = "participant_0";
HelixManager manager = new MockZKHelixManager(clusterName, controllerName,
InstanceType.PARTICIPANT,
_gZkClient);
DistClusterControllerElection election = new DistClusterControllerElection(ZK_ADDR);
NotificationContext context = new NotificationContext(manager);
context.setType(NotificationContext.Type.INIT);
election.onControllerChange(context);
path = PropertyPathConfig.getPath(PropertyType.LEADER, clusterName);
ZNRecord leaderRecord = _gZkClient.<ZNRecord> readData(path, true);
AssertJUnit.assertNull(leaderRecord);
// AssertJUnit.assertNull(election.getController());
// AssertJUnit.assertNull(election.getLeader());
}
}