| 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.concurrent.CountDownLatch; |
| import java.util.concurrent.Executors; |
| import java.util.concurrent.ScheduledFuture; |
| import java.util.concurrent.TimeUnit; |
| import java.util.concurrent.atomic.AtomicReference; |
| |
| import org.I0Itec.zkclient.ZkServer; |
| import org.apache.helix.HelixAdmin; |
| import org.apache.helix.HelixManager; |
| import org.apache.helix.HelixManagerFactory; |
| import org.apache.helix.InstanceType; |
| import org.apache.helix.NotificationContext; |
| import org.apache.helix.TestHelper; |
| import org.apache.helix.model.IdealState; |
| import org.apache.helix.model.Message; |
| import org.apache.helix.participant.statemachine.StateModel; |
| import org.apache.helix.participant.statemachine.StateModelFactory; |
| import org.apache.helix.tools.ClusterSetup; |
| import org.apache.helix.tools.ClusterStateVerifier; |
| import org.apache.helix.tools.ClusterStateVerifier.BestPossAndExtViewZkVerifier; |
| import org.apache.log4j.Logger; |
| import org.testng.Assert; |
| import org.testng.annotations.Test; |
| |
| public class TestZkReconnect { |
| private static final Logger LOG = Logger.getLogger(TestZkReconnect.class); |
| |
| @Test |
| public void testZKReconnect() throws Exception { |
| final AtomicReference<ZkServer> zkServerRef = new AtomicReference<ZkServer>(); |
| final int zkPort = TestHelper.getRandomPort(); |
| final String zkAddr = String.format("localhost:%d", zkPort); |
| ZkServer zkServer = TestHelper.startZkServer(zkAddr); |
| zkServerRef.set(zkServer); |
| |
| String className = TestHelper.getTestClassName(); |
| String methodName = TestHelper.getTestMethodName(); |
| String clusterName = className + "_" + methodName; |
| |
| // Setup cluster |
| LOG.info("Setup clusters"); |
| ClusterSetup clusterSetup = new ClusterSetup(zkAddr); |
| clusterSetup.addCluster(clusterName, true); |
| |
| // Registers and starts controller |
| LOG.info("Starts controller"); |
| HelixManager controller = HelixManagerFactory.getZKHelixManager(clusterName, null, InstanceType.CONTROLLER, zkAddr); |
| controller.connect(); |
| |
| // Registers and starts participant |
| LOG.info("Starts participant"); |
| String hostname = "localhost"; |
| String instanceId = String.format("%s_%d", hostname, 1); |
| clusterSetup.addInstanceToCluster(clusterName, instanceId); |
| HelixManager participant = HelixManagerFactory.getZKHelixManager(clusterName, |
| instanceId, InstanceType.PARTICIPANT, zkAddr); |
| participant.connect(); |
| |
| LOG.info("Register state machine"); |
| final CountDownLatch latch = new CountDownLatch(1); |
| participant.getStateMachineEngine().registerStateModelFactory("OnlineOffline", |
| new StateModelFactory<StateModel>() { |
| @Override |
| public StateModel createNewStateModel(String stateUnitKey) { |
| return new SimpleStateModel(latch); |
| } |
| }, "test" |
| ); |
| |
| String resourceName = "test-resource"; |
| LOG.info("Ideal state assignment"); |
| HelixAdmin helixAdmin = participant.getClusterManagmentTool(); |
| helixAdmin.addResource(clusterName, resourceName, 1, "OnlineOffline", |
| IdealState.IdealStateModeProperty.CUSTOMIZED.toString()); |
| |
| IdealState idealState = helixAdmin.getResourceIdealState(clusterName, resourceName); |
| idealState.setReplicas("1"); |
| idealState.setStateModelFactoryName("test"); |
| idealState.setPartitionState(resourceName + "_0", instanceId, "ONLINE"); |
| |
| LOG.info("Shutdown ZK server"); |
| TestHelper.stopZkServer(zkServerRef.get()); |
| Executors.newSingleThreadScheduledExecutor().schedule(new Runnable() { |
| |
| @Override |
| public void run() { |
| try { |
| LOG.info("Restart ZK server"); |
| // zkServer.set(TestUtils.startZookeeper(zkDir, zkPort)); |
| zkServerRef.set(TestHelper.startZkServer(zkAddr, null, false)); |
| } catch (Exception e) { |
| LOG.error(e.getMessage(), e); |
| } |
| } |
| }, 2L, TimeUnit.SECONDS); |
| |
| // future.get(); |
| |
| LOG.info("Before update ideal state"); |
| helixAdmin.setResourceIdealState(clusterName, resourceName, idealState); |
| LOG.info("After update ideal state"); |
| |
| LOG.info("Wait for OFFLINE->ONLINE state transition"); |
| try { |
| Assert.assertTrue(latch.await(10, TimeUnit.SECONDS)); |
| |
| // wait until stable state |
| boolean result = |
| ClusterStateVerifier.verifyByZkCallback(new BestPossAndExtViewZkVerifier(zkAddr, |
| clusterName)); |
| Assert.assertTrue(result); |
| |
| } finally { |
| participant.disconnect(); |
| zkServerRef.get().shutdown(); |
| } |
| } |
| |
| public static final class SimpleStateModel extends StateModel { |
| |
| private final CountDownLatch latch; |
| |
| public SimpleStateModel(CountDownLatch latch) { |
| this.latch = latch; |
| } |
| |
| public void onBecomeOnlineFromOffline(Message message, NotificationContext context) { |
| // LOG.info(HelixUtils.toString(message)); |
| LOG.info("message: " + message); |
| latch.countDown(); |
| } |
| } |
| |
| } |