| /** |
| * 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. |
| */ |
| |
| package org.apache.curator.framework.recipes.watch; |
| |
| import static org.junit.jupiter.api.Assertions.assertEquals; |
| import static org.junit.jupiter.api.Assertions.assertTrue; |
| |
| import org.apache.curator.framework.CuratorFramework; |
| import org.apache.curator.framework.CuratorFrameworkFactory; |
| import org.apache.curator.framework.state.ConnectionState; |
| import org.apache.curator.retry.RetryOneTime; |
| import org.apache.curator.test.compatibility.CuratorTestBase; |
| import org.apache.zookeeper.WatchedEvent; |
| import org.apache.zookeeper.Watcher; |
| import org.junit.jupiter.api.Tag; |
| import org.junit.jupiter.api.Test; |
| |
| import java.util.concurrent.BlockingQueue; |
| import java.util.concurrent.CountDownLatch; |
| import java.util.concurrent.LinkedBlockingQueue; |
| |
| @Tag(CuratorTestBase.zk36Group) |
| public class TestPersistentWatcher extends CuratorTestBase |
| { |
| @Test |
| public void testConnectionLostRecursive() throws Exception |
| { |
| internalTest(true); |
| } |
| |
| @Test |
| public void testConnectionLost() throws Exception |
| { |
| internalTest(false); |
| } |
| |
| private void internalTest(boolean recursive) throws Exception |
| { |
| try ( CuratorFramework client = CuratorFrameworkFactory.newClient(server.getConnectString(), timing.session(), timing.connection(), new RetryOneTime(1)) ) |
| { |
| CountDownLatch lostLatch = new CountDownLatch(1); |
| CountDownLatch reconnectedLatch = new CountDownLatch(1); |
| client.start(); |
| client.getConnectionStateListenable().addListener((__, newState) -> { |
| if ( newState == ConnectionState.LOST ) |
| { |
| lostLatch.countDown(); |
| } |
| else if ( newState == ConnectionState.RECONNECTED ) |
| { |
| reconnectedLatch.countDown(); |
| } |
| }); |
| |
| try ( PersistentWatcher persistentWatcher = new PersistentWatcher(client, "/top/main", recursive) ) |
| { |
| persistentWatcher.start(); |
| |
| BlockingQueue<WatchedEvent> events = new LinkedBlockingQueue<>(); |
| persistentWatcher.getListenable().addListener(events::add); |
| |
| client.create().creatingParentsIfNeeded().forPath("/top/main/a"); |
| assertEquals(timing.takeFromQueue(events).getPath(), "/top/main"); |
| if ( recursive ) |
| { |
| assertEquals(timing.takeFromQueue(events).getPath(), "/top/main/a"); |
| } |
| else |
| { |
| assertEquals(timing.takeFromQueue(events).getPath(), "/top/main"); // child added |
| } |
| |
| server.stop(); |
| assertEquals(timing.takeFromQueue(events).getState(), Watcher.Event.KeeperState.Disconnected); |
| assertTrue(timing.awaitLatch(lostLatch)); |
| |
| server.restart(); |
| assertTrue(timing.awaitLatch(reconnectedLatch)); |
| |
| timing.sleepABit(); // time to allow watcher to get reset |
| events.clear(); |
| |
| if ( recursive ) |
| { |
| client.setData().forPath("/top/main/a", "foo".getBytes()); |
| assertEquals(timing.takeFromQueue(events).getType(), Watcher.Event.EventType.NodeDataChanged); |
| } |
| client.setData().forPath("/top/main", "bar".getBytes()); |
| assertEquals(timing.takeFromQueue(events).getPath(), "/top/main"); |
| } |
| } |
| } |
| } |