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.HashSet;
import java.util.Set;
import java.util.UUID;
import org.apache.helix.HelixDataAccessor;
import org.apache.helix.HelixManager;
import org.apache.helix.NotificationContext;
import org.apache.helix.PropertyKey;
import org.apache.helix.TestHelper;
import org.apache.helix.ZkTestHelper;
import org.apache.helix.manager.zk.MockParticipant;
import org.apache.helix.manager.zk.MockController;
import org.apache.helix.messaging.handling.HelixTaskResult;
import org.apache.helix.messaging.handling.MessageHandler;
import org.apache.helix.messaging.handling.MessageHandlerFactory;
import org.apache.helix.model.Message;
import org.apache.helix.testutil.ZkTestBase;
import org.apache.helix.tools.ClusterStateVerifier;
import org.testng.Assert;
import org.testng.annotations.Test;
public class TestZkSessionExpiry extends ZkTestBase {
final static String DUMMY_MSG_TYPE = "DUMMY";
static class DummyMessageHandler extends MessageHandler {
final Set<String> _handledMsgSet;
public DummyMessageHandler(Message message, NotificationContext context,
Set<String> handledMsgSet) {
super(message, context);
_handledMsgSet = handledMsgSet;
}
@Override
public HelixTaskResult handleMessage() throws InterruptedException {
_handledMsgSet.add(_message.getId());
HelixTaskResult ret = new HelixTaskResult();
ret.setSuccess(true);
return ret;
}
@Override
public void onError(Exception e, ErrorCode code, ErrorType type) {
// Do nothing
}
}
static class DummyMessageHandlerFactory implements MessageHandlerFactory {
final Set<String> _handledMsgSet;
public DummyMessageHandlerFactory(Set<String> handledMsgSet) {
_handledMsgSet = handledMsgSet;
}
@Override
public MessageHandler createHandler(Message message, NotificationContext context) {
return new DummyMessageHandler(message, context, _handledMsgSet);
}
@Override
public String getMessageType() {
return DUMMY_MSG_TYPE;
}
@Override
public void reset() {
// Do nothing
}
}
@Test
public void testMsgHdlrFtyReRegistration() throws Exception {
String className = TestHelper.getTestClassName();
String methodName = TestHelper.getTestMethodName();
String clusterName = className + "_" + methodName;
int n = 2;
System.out.println("START " + clusterName + " at " + new Date(System.currentTimeMillis()));
TestHelper.setupCluster(clusterName, _zkaddr, 12918, // participant port
"localhost", // participant name prefix
"TestDB", // resource name prefix
1, // resources
8, // partitions per resource
n, // number of nodes
2, // replicas
"MasterSlave", true); // do rebalance
MockController controller =
new MockController(_zkaddr, clusterName, "controller_0");
controller.syncStart();
// start participants
Set<String> handledMsgSet = new HashSet<String>();
MockParticipant[] participants = new MockParticipant[n];
for (int i = 0; i < n; i++) {
String instanceName = "localhost_" + (12918 + i);
participants[i] = new MockParticipant(_zkaddr, clusterName, instanceName);
participants[i].getMessagingService().registerMessageHandlerFactory(DUMMY_MSG_TYPE,
new DummyMessageHandlerFactory(handledMsgSet));
participants[i].syncStart();
}
boolean result =
ClusterStateVerifier
.verifyByZkCallback(new ClusterStateVerifier.BestPossAndExtViewZkVerifier(_zkaddr,
clusterName));
Assert.assertTrue(result);
// trigger dummy message handler
checkDummyMsgHandler(participants[0], handledMsgSet);
// expire localhost_12918
ZkTestHelper.expireSession(participants[0].getZkClient());
result =
ClusterStateVerifier
.verifyByZkCallback(new ClusterStateVerifier.BestPossAndExtViewZkVerifier(_zkaddr,
clusterName));
Assert.assertTrue(result);
// trigger dummy message handler again
checkDummyMsgHandler(participants[0], handledMsgSet);
// clean up
controller.syncStop();
for (int i = 0; i < n; i++) {
participants[i].syncStop();
}
System.out.println("END " + clusterName + " at " + new Date(System.currentTimeMillis()));
}
/**
* trigger dummy message handler and verify it's invoked
* @param manager
* @param handledMsgMap
* @throws Exception
*/
private static void checkDummyMsgHandler(HelixManager manager,
final Set<String> handledMsgSet) throws Exception {
final Message aMsg = newMsg();
HelixDataAccessor accessor = manager.getHelixDataAccessor();
PropertyKey.Builder keyBuilder = accessor.keyBuilder();
accessor.setProperty(keyBuilder.message(manager.getInstanceName(), aMsg.getId()), aMsg);
boolean result = TestHelper.verify(new TestHelper.Verifier() {
@Override
public boolean verify() throws Exception {
return handledMsgSet.contains(aMsg.getId());
}
}, 5 * 1000);
Assert.assertTrue(result);
}
private static Message newMsg() {
Message msg = new Message(DUMMY_MSG_TYPE, UUID.randomUUID().toString());
msg.setTgtSessionId("*");
msg.setTgtName("localhost_12918");
return msg;
}
}