| /** |
| * 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 |
| * <p> |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * <p> |
| * 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.zookeeper.test; |
| |
| import static org.apache.zookeeper.AddWatchMode.PERSISTENT; |
| import static org.apache.zookeeper.AddWatchMode.PERSISTENT_RECURSIVE; |
| import static org.junit.jupiter.api.Assertions.assertEquals; |
| import static org.junit.jupiter.api.Assertions.assertNotNull; |
| import static org.junit.jupiter.api.Assertions.assertTrue; |
| import java.io.IOException; |
| import java.util.concurrent.BlockingQueue; |
| import java.util.concurrent.CountDownLatch; |
| import java.util.concurrent.LinkedBlockingQueue; |
| import java.util.concurrent.TimeUnit; |
| import org.apache.zookeeper.AsyncCallback; |
| import org.apache.zookeeper.CreateMode; |
| import org.apache.zookeeper.KeeperException; |
| import org.apache.zookeeper.WatchedEvent; |
| import org.apache.zookeeper.Watcher; |
| import org.apache.zookeeper.ZooDefs; |
| import org.apache.zookeeper.ZooKeeper; |
| import org.junit.jupiter.api.BeforeEach; |
| import org.junit.jupiter.api.Test; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| public class PersistentRecursiveWatcherTest extends ClientBase { |
| private static final Logger LOG = LoggerFactory.getLogger(PersistentRecursiveWatcherTest.class); |
| private BlockingQueue<WatchedEvent> events; |
| private Watcher persistentWatcher; |
| |
| @Override |
| @BeforeEach |
| public void setUp() throws Exception { |
| super.setUp(); |
| |
| events = new LinkedBlockingQueue<>(); |
| persistentWatcher = event -> events.add(event); |
| } |
| |
| @Test |
| public void testBasic() |
| throws IOException, InterruptedException, KeeperException { |
| try (ZooKeeper zk = createClient(new CountdownWatcher(), hostPort)) { |
| zk.addWatch("/a/b", persistentWatcher, PERSISTENT_RECURSIVE); |
| internalTestBasic(zk); |
| } |
| } |
| |
| @Test |
| public void testBasicAsync() |
| throws IOException, InterruptedException, KeeperException { |
| try (ZooKeeper zk = createClient(new CountdownWatcher(), hostPort)) { |
| final CountDownLatch latch = new CountDownLatch(1); |
| AsyncCallback.VoidCallback cb = (rc, path, ctx) -> { |
| if (rc == KeeperException.Code.OK.intValue()) { |
| latch.countDown(); |
| } |
| }; |
| zk.addWatch("/a/b", persistentWatcher, PERSISTENT_RECURSIVE, cb, null); |
| assertTrue(latch.await(5, TimeUnit.SECONDS)); |
| internalTestBasic(zk); |
| } |
| } |
| |
| private void internalTestBasic(ZooKeeper zk) throws KeeperException, InterruptedException { |
| zk.create("/a", new byte[0], ZooDefs.Ids.OPEN_ACL_UNSAFE, CreateMode.PERSISTENT); |
| zk.create("/a/b", new byte[0], ZooDefs.Ids.OPEN_ACL_UNSAFE, CreateMode.PERSISTENT); |
| zk.create("/a/b/c", new byte[0], ZooDefs.Ids.OPEN_ACL_UNSAFE, CreateMode.PERSISTENT); |
| zk.create("/a/b/c/d", new byte[0], ZooDefs.Ids.OPEN_ACL_UNSAFE, CreateMode.PERSISTENT); |
| zk.create("/a/b/c/d/e", new byte[0], ZooDefs.Ids.OPEN_ACL_UNSAFE, CreateMode.PERSISTENT); |
| zk.setData("/a/b/c/d/e", new byte[0], -1); |
| zk.delete("/a/b/c/d/e", -1); |
| zk.create("/a/b/c/d/e", new byte[0], ZooDefs.Ids.OPEN_ACL_UNSAFE, CreateMode.PERSISTENT); |
| |
| assertEvent(events, Watcher.Event.EventType.NodeCreated, "/a/b"); |
| assertEvent(events, Watcher.Event.EventType.NodeCreated, "/a/b/c"); |
| assertEvent(events, Watcher.Event.EventType.NodeCreated, "/a/b/c/d"); |
| assertEvent(events, Watcher.Event.EventType.NodeCreated, "/a/b/c/d/e"); |
| assertEvent(events, Watcher.Event.EventType.NodeDataChanged, "/a/b/c/d/e"); |
| assertEvent(events, Watcher.Event.EventType.NodeDeleted, "/a/b/c/d/e"); |
| assertEvent(events, Watcher.Event.EventType.NodeCreated, "/a/b/c/d/e"); |
| } |
| |
| @Test |
| public void testRemoval() |
| throws IOException, InterruptedException, KeeperException { |
| try (ZooKeeper zk = createClient(new CountdownWatcher(), hostPort)) { |
| zk.addWatch("/a/b", persistentWatcher, PERSISTENT_RECURSIVE); |
| zk.create("/a", new byte[0], ZooDefs.Ids.OPEN_ACL_UNSAFE, CreateMode.PERSISTENT); |
| zk.create("/a/b", new byte[0], ZooDefs.Ids.OPEN_ACL_UNSAFE, CreateMode.PERSISTENT); |
| zk.create("/a/b/c", new byte[0], ZooDefs.Ids.OPEN_ACL_UNSAFE, CreateMode.PERSISTENT); |
| assertEvent(events, Watcher.Event.EventType.NodeCreated, "/a/b"); |
| assertEvent(events, Watcher.Event.EventType.NodeCreated, "/a/b/c"); |
| |
| zk.removeWatches("/a/b", persistentWatcher, Watcher.WatcherType.Any, false); |
| zk.create("/a/b/c/d", new byte[0], ZooDefs.Ids.OPEN_ACL_UNSAFE, CreateMode.PERSISTENT); |
| assertEvent(events, Watcher.Event.EventType.PersistentWatchRemoved, "/a/b"); |
| } |
| } |
| |
| @Test |
| public void testNoChildEvents() throws Exception { |
| try (ZooKeeper zk = createClient()) { |
| zk.create("/a", new byte[0], ZooDefs.Ids.OPEN_ACL_UNSAFE, CreateMode.PERSISTENT); |
| |
| zk.addWatch("/", persistentWatcher, PERSISTENT_RECURSIVE); |
| |
| BlockingQueue<WatchedEvent> childEvents = new LinkedBlockingQueue<>(); |
| zk.getChildren("/a", childEvents::add); |
| |
| zk.create("/a/b", new byte[0], ZooDefs.Ids.OPEN_ACL_UNSAFE, CreateMode.PERSISTENT); |
| zk.create("/a/b/c", new byte[0], ZooDefs.Ids.OPEN_ACL_UNSAFE, CreateMode.PERSISTENT); |
| |
| assertEvent(childEvents, Watcher.Event.EventType.NodeChildrenChanged, "/a"); |
| |
| assertEvent(events, Watcher.Event.EventType.NodeCreated, "/a/b"); |
| assertEvent(events, Watcher.Event.EventType.NodeCreated, "/a/b/c"); |
| assertTrue(events.isEmpty()); |
| } |
| } |
| |
| @Test |
| public void testDisconnect() throws Exception { |
| try (ZooKeeper zk = createClient(new CountdownWatcher(), hostPort)) { |
| zk.addWatch("/a/b", persistentWatcher, PERSISTENT_RECURSIVE); |
| stopServer(); |
| assertEvent(events, Watcher.Event.EventType.None, null); |
| startServer(); |
| assertEvent(events, Watcher.Event.EventType.None, null); |
| internalTestBasic(zk); |
| } |
| } |
| |
| @Test |
| public void testMultiClient() |
| throws IOException, InterruptedException, KeeperException { |
| try (ZooKeeper zk1 = createClient(new CountdownWatcher(), hostPort); ZooKeeper zk2 = createClient(new CountdownWatcher(), hostPort)) { |
| |
| zk1.create("/a", new byte[0], ZooDefs.Ids.OPEN_ACL_UNSAFE, CreateMode.PERSISTENT); |
| zk1.create("/a/b", new byte[0], ZooDefs.Ids.OPEN_ACL_UNSAFE, CreateMode.PERSISTENT); |
| zk1.create("/a/b/c", new byte[0], ZooDefs.Ids.OPEN_ACL_UNSAFE, CreateMode.PERSISTENT); |
| |
| zk1.addWatch("/a/b", persistentWatcher, PERSISTENT_RECURSIVE); |
| zk1.setData("/a/b/c", "one".getBytes(), -1); |
| Thread.sleep(1000); // give some time for the event to arrive |
| |
| zk2.setData("/a/b/c", "two".getBytes(), -1); |
| zk2.setData("/a/b/c", "three".getBytes(), -1); |
| zk2.setData("/a/b/c", "four".getBytes(), -1); |
| |
| assertEvent(events, Watcher.Event.EventType.NodeDataChanged, "/a/b/c"); |
| assertEvent(events, Watcher.Event.EventType.NodeDataChanged, "/a/b/c"); |
| assertEvent(events, Watcher.Event.EventType.NodeDataChanged, "/a/b/c"); |
| assertEvent(events, Watcher.Event.EventType.NodeDataChanged, "/a/b/c"); |
| } |
| } |
| |
| @Test |
| public void testSamePathWithDifferentWatchModes() throws Exception { |
| try (ZooKeeper zk = createClient()) { |
| BlockingQueue<WatchedEvent> dataEvents = new LinkedBlockingQueue<>(); |
| BlockingQueue<WatchedEvent> childEvents = new LinkedBlockingQueue<>(); |
| BlockingQueue<WatchedEvent> persistentEvents = new LinkedBlockingQueue<>(); |
| BlockingQueue<WatchedEvent> recursiveEvents = new LinkedBlockingQueue<>(); |
| |
| zk.addWatch("/a", persistentEvents::add, PERSISTENT); |
| zk.addWatch("/a", recursiveEvents::add, PERSISTENT_RECURSIVE); |
| zk.exists("/a", dataEvents::add); |
| |
| zk.create("/a", new byte[0], ZooDefs.Ids.OPEN_ACL_UNSAFE, CreateMode.PERSISTENT); |
| assertEvent(dataEvents, Watcher.Event.EventType.NodeCreated, "/a"); |
| assertEvent(persistentEvents, Watcher.Event.EventType.NodeCreated, "/a"); |
| assertEvent(recursiveEvents, Watcher.Event.EventType.NodeCreated, "/a"); |
| |
| zk.getData("/a", dataEvents::add, null); |
| zk.setData("/a", new byte[0], -1); |
| assertEvent(dataEvents, Watcher.Event.EventType.NodeDataChanged, "/a"); |
| assertEvent(persistentEvents, Watcher.Event.EventType.NodeDataChanged, "/a"); |
| assertEvent(recursiveEvents, Watcher.Event.EventType.NodeDataChanged, "/a"); |
| |
| zk.getChildren("/a", childEvents::add); |
| zk.create("/a/b", new byte[0], ZooDefs.Ids.OPEN_ACL_UNSAFE, CreateMode.PERSISTENT); |
| assertEvent(childEvents, Watcher.Event.EventType.NodeChildrenChanged, "/a"); |
| assertEvent(persistentEvents, Watcher.Event.EventType.NodeChildrenChanged, "/a"); |
| assertEvent(recursiveEvents, Watcher.Event.EventType.NodeCreated, "/a/b"); |
| |
| zk.getChildren("/a", childEvents::add); |
| zk.delete("/a/b", -1); |
| assertEvent(childEvents, Watcher.Event.EventType.NodeChildrenChanged, "/a"); |
| assertEvent(persistentEvents, Watcher.Event.EventType.NodeChildrenChanged, "/a"); |
| assertEvent(recursiveEvents, Watcher.Event.EventType.NodeDeleted, "/a/b"); |
| |
| zk.getChildren("/a", childEvents::add); |
| zk.getData("/a", dataEvents::add, null); |
| zk.exists("/a", dataEvents::add); |
| zk.delete("/a", -1); |
| assertEvent(childEvents, Watcher.Event.EventType.NodeDeleted, "/a"); |
| assertEvent(dataEvents, Watcher.Event.EventType.NodeDeleted, "/a"); |
| assertEvent(dataEvents, Watcher.Event.EventType.NodeDeleted, "/a"); |
| assertEvent(persistentEvents, Watcher.Event.EventType.NodeDeleted, "/a"); |
| assertEvent(recursiveEvents, Watcher.Event.EventType.NodeDeleted, "/a"); |
| } |
| } |
| |
| @Test |
| public void testRootWatcher() |
| throws IOException, InterruptedException, KeeperException { |
| try (ZooKeeper zk = createClient(new CountdownWatcher(), hostPort)) { |
| zk.addWatch("/", persistentWatcher, PERSISTENT_RECURSIVE); |
| zk.create("/a", new byte[0], ZooDefs.Ids.OPEN_ACL_UNSAFE, CreateMode.PERSISTENT); |
| zk.create("/a/b", new byte[0], ZooDefs.Ids.OPEN_ACL_UNSAFE, CreateMode.PERSISTENT); |
| zk.create("/b", new byte[0], ZooDefs.Ids.OPEN_ACL_UNSAFE, CreateMode.PERSISTENT); |
| zk.create("/b/c", new byte[0], ZooDefs.Ids.OPEN_ACL_UNSAFE, CreateMode.PERSISTENT); |
| assertEvent(events, Watcher.Event.EventType.NodeCreated, "/a"); |
| assertEvent(events, Watcher.Event.EventType.NodeCreated, "/a/b"); |
| assertEvent(events, Watcher.Event.EventType.NodeCreated, "/b"); |
| assertEvent(events, Watcher.Event.EventType.NodeCreated, "/b/c"); |
| } |
| } |
| |
| private void assertEvent(BlockingQueue<WatchedEvent> events, Watcher.Event.EventType eventType, String path) |
| throws InterruptedException { |
| WatchedEvent event = events.poll(5, TimeUnit.SECONDS); |
| assertNotNull(event); |
| assertEquals(eventType, event.getType()); |
| assertEquals(path, event.getPath()); |
| } |
| } |