| package org.apache.helix.zookeeper.zkclient; |
| |
| /* |
| * 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.TimeUnit; |
| |
| import org.apache.helix.zookeeper.impl.TestHelper; |
| import org.apache.helix.zookeeper.impl.ZkTestBase; |
| import org.apache.helix.zookeeper.impl.client.ZkClient; |
| import org.apache.helix.zookeeper.zkclient.annotation.PreFetchChangedData; |
| import org.testng.Assert; |
| import org.testng.annotations.Test; |
| |
| public class TestPrefetchChangedData extends ZkTestBase { |
| @Test |
| public void testPrefetchChangedDataEnabled() throws InterruptedException { |
| String path = "/" + TestHelper.getTestMethodName(); |
| ZkClient zkClient = new ZkClient(ZkTestBase.ZK_ADDR); |
| |
| try { |
| zkClient.createPersistent(path, "v1"); |
| |
| CountDownLatch countDownLatch = new CountDownLatch(1); |
| PreFetchZkDataListener dataListener = new PreFetchZkDataListener(countDownLatch); |
| zkClient.subscribeDataChanges(path, dataListener); |
| zkClient.writeData(path, "v2"); |
| |
| Assert.assertTrue(countDownLatch.await(3L, TimeUnit.SECONDS)); |
| |
| Assert.assertTrue(dataListener.isDataPreFetched()); |
| } finally { |
| zkClient.unsubscribeAll(); |
| zkClient.delete(path); |
| zkClient.close(); |
| } |
| } |
| |
| @Test |
| public void testPrefetchChangedDataDisabled() throws InterruptedException { |
| String path = "/" + TestHelper.getTestMethodName(); |
| ZkClient zkClient = new ZkClient(ZkTestBase.ZK_ADDR); |
| |
| try { |
| zkClient.createPersistent(path, "v1"); |
| |
| CountDownLatch countDownLatch = new CountDownLatch(1); |
| PreFetchZkDataListener dataListener = new PreFetchDisabledZkDataListener(countDownLatch); |
| zkClient.subscribeDataChanges(path, dataListener); |
| zkClient.writeData(path, "v2"); |
| |
| Assert.assertTrue(countDownLatch.await(3L, TimeUnit.SECONDS)); |
| |
| Assert.assertFalse(dataListener.isDataPreFetched()); |
| } finally { |
| zkClient.unsubscribeAll(); |
| zkClient.delete(path); |
| zkClient.close(); |
| } |
| } |
| |
| private static class PreFetchZkDataListener implements IZkDataListener { |
| private boolean isDataPreFetched; |
| private CountDownLatch countDownLatch; |
| |
| public PreFetchZkDataListener(CountDownLatch countDownLatch) { |
| this.countDownLatch = countDownLatch; |
| } |
| |
| @Override |
| public void handleDataChange(String dataPath, Object data) throws Exception { |
| isDataPreFetched = (data != null); |
| countDownLatch.countDown(); |
| } |
| |
| @Override |
| public void handleDataDeleted(String dataPath) throws Exception { |
| // Not implemented |
| } |
| |
| public boolean isDataPreFetched() { |
| return isDataPreFetched; |
| } |
| } |
| |
| @PreFetchChangedData(enabled = false) |
| private static class PreFetchDisabledZkDataListener extends PreFetchZkDataListener { |
| public PreFetchDisabledZkDataListener(CountDownLatch countDownLatch) { |
| super(countDownLatch); |
| } |
| } |
| } |