| package org.apache.helix; |
| |
| /* |
| * 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.List; |
| |
| import org.apache.helix.PropertyKey.Builder; |
| import org.apache.helix.api.listeners.PreFetch; |
| import org.apache.helix.model.IdealState; |
| import org.apache.helix.model.InstanceConfig; |
| import org.testng.Assert; |
| import org.testng.annotations.AfterClass; |
| import org.testng.annotations.BeforeClass; |
| import org.testng.annotations.Test; |
| |
| |
| public class TestListenerCallbackPrefetch extends ZkUnitTestBase { |
| |
| class PrefetchListener implements InstanceConfigChangeListener, IdealStateChangeListener { |
| boolean _idealStateChanged = false; |
| boolean _instanceConfigChanged = false; |
| boolean _containIdealStates = false; |
| boolean _containInstanceConfig = false; |
| |
| @Override |
| public void onIdealStateChange(List<IdealState> idealState, NotificationContext changeContext) { |
| _idealStateChanged = true; |
| _containIdealStates = idealState.isEmpty()? false : true; |
| } |
| |
| @Override |
| public void onInstanceConfigChange(List<InstanceConfig> instanceConfigs, NotificationContext context) { |
| _instanceConfigChanged = true; |
| _containInstanceConfig = instanceConfigs.isEmpty()? false : true; |
| } |
| |
| public void reset() { |
| _idealStateChanged = false; |
| _instanceConfigChanged = false; |
| _containIdealStates = false; |
| _containInstanceConfig = false; |
| } |
| } |
| |
| @PreFetch (enabled = false) |
| class NonPrefetchListener extends PrefetchListener { |
| } |
| |
| |
| class MixedPrefetchListener extends PrefetchListener { |
| @PreFetch(enabled = false) |
| @Override |
| public void onIdealStateChange(List<IdealState> idealState, NotificationContext changeContext) { |
| _idealStateChanged = true; |
| _containIdealStates = idealState.isEmpty()? false : true; |
| } |
| } |
| |
| |
| private HelixManager _manager; |
| |
| String clusterName = TestHelper.getTestClassName(); |
| |
| @BeforeClass |
| public void beforeClass() |
| throws Exception { |
| // Logger.getRootLogger().setLevel(Level.INFO); |
| |
| int n = 2; |
| TestHelper.setupCluster(clusterName, ZK_ADDR, 12918, // participant port |
| "localhost", // participant name prefix |
| "TestDB", // resource name prefix |
| 1, // resources |
| 32, // partitions per resource |
| n, // number of nodes |
| 2, // replicas |
| "MasterSlave", true); // do rebalance |
| |
| _manager = |
| HelixManagerFactory.getZKHelixManager(clusterName, "localhost", InstanceType.SPECTATOR, |
| ZK_ADDR); |
| |
| _manager.connect(); |
| } |
| |
| @AfterClass |
| public void afterClass() |
| throws Exception { |
| _manager.disconnect(); |
| deleteCluster(clusterName); |
| } |
| |
| @Test |
| public void testPrefetch() throws Exception { |
| String methodName = TestHelper.getTestMethodName(); |
| System.out.println("START " + methodName + " at " + new Date(System.currentTimeMillis())); |
| |
| PrefetchListener listener = new PrefetchListener(); |
| _manager.addInstanceConfigChangeListener(listener); |
| _manager.addIdealStateChangeListener(listener); |
| Assert.assertTrue(listener._instanceConfigChanged); |
| Assert.assertTrue(listener._idealStateChanged); |
| Assert.assertTrue(listener._containInstanceConfig); |
| Assert.assertTrue(listener._containIdealStates); |
| |
| listener.reset(); |
| // test change content |
| updateInstanceConfig(); |
| updateIdealState(); |
| Thread.sleep(500); // wait zk callback |
| Assert.assertTrue(listener._instanceConfigChanged); |
| Assert.assertTrue(listener._containInstanceConfig); |
| Assert.assertTrue(listener._idealStateChanged); |
| Assert.assertTrue(listener._containIdealStates); |
| |
| System.out.println("END " + methodName + " at " + new Date(System.currentTimeMillis())); |
| } |
| |
| |
| @Test |
| public void testNoPrefetch() throws Exception { |
| String methodName = TestHelper.getTestMethodName(); |
| |
| NonPrefetchListener listener = new NonPrefetchListener(); |
| _manager.addInstanceConfigChangeListener(listener); |
| _manager.addIdealStateChangeListener(listener); |
| Assert.assertTrue(listener._instanceConfigChanged); |
| Assert.assertTrue(listener._idealStateChanged); |
| Assert.assertFalse(listener._containInstanceConfig); |
| Assert.assertFalse(listener._containIdealStates); |
| listener.reset(); |
| |
| updateInstanceConfig(); |
| updateIdealState(); |
| |
| Thread.sleep(500); // wait zk callback |
| Assert.assertTrue(listener._instanceConfigChanged); |
| Assert.assertFalse(listener._containInstanceConfig); |
| Assert.assertTrue(listener._idealStateChanged); |
| Assert.assertFalse(listener._containIdealStates); |
| |
| System.out.println("END " + methodName + " at " + new Date(System.currentTimeMillis())); |
| } |
| |
| |
| @Test |
| public void testMixed() throws Exception { |
| String methodName = TestHelper.getTestMethodName(); |
| |
| MixedPrefetchListener listener = new MixedPrefetchListener(); |
| _manager.addInstanceConfigChangeListener(listener); |
| _manager.addIdealStateChangeListener(listener); |
| Assert.assertTrue(listener._instanceConfigChanged); |
| Assert.assertTrue(listener._idealStateChanged); |
| Assert.assertTrue(listener._containInstanceConfig); |
| Assert.assertFalse(listener._containIdealStates); |
| |
| listener.reset(); |
| |
| updateInstanceConfig(); |
| updateIdealState(); |
| |
| Thread.sleep(500); // wait zk callback |
| Assert.assertTrue(listener._instanceConfigChanged); |
| Assert.assertTrue(listener._containInstanceConfig); |
| Assert.assertTrue(listener._idealStateChanged); |
| Assert.assertFalse(listener._containIdealStates); |
| |
| System.out.println("END " + methodName + " at " + new Date(System.currentTimeMillis())); |
| } |
| |
| private void updateInstanceConfig() { |
| // test change content |
| HelixDataAccessor accessor = _manager.getHelixDataAccessor(); |
| Builder keyBuilder = accessor.keyBuilder(); |
| String instanceName = "localhost_12918"; |
| HelixProperty value = accessor.getProperty(keyBuilder.instanceConfig(instanceName)); |
| value._record.setLongField("TimeStamp", System.currentTimeMillis()); |
| accessor.setProperty(keyBuilder.instanceConfig(instanceName), value); |
| } |
| |
| private void updateIdealState() { |
| HelixDataAccessor accessor = _manager.getHelixDataAccessor(); |
| Builder keyBuilder = accessor.keyBuilder(); |
| List<String> idealStates = accessor.getChildNames(keyBuilder.idealStates()); |
| IdealState idealState = accessor.getProperty(keyBuilder.idealStates(idealStates.get(0))); |
| idealState.setNumPartitions((int)(System.currentTimeMillis()%50L)); |
| accessor.setProperty(keyBuilder.idealStates(idealState.getId()), idealState); |
| } |
| } |