/**
* 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.zookeeper.test;
import java.util.concurrent.LinkedBlockingQueue;
import java.util.concurrent.TimeUnit;
import org.apache.zookeeper.CreateMode;
import org.apache.zookeeper.WatchedEvent;
import org.apache.zookeeper.ZooKeeper;
import org.apache.zookeeper.Watcher.Event.EventType;
import org.apache.zookeeper.ZooDefs.Ids;
import org.junit.Assert;
import org.junit.Test;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
public class DisconnectedWatcherTest extends ClientBase {
protected static final Logger LOG = LoggerFactory.getLogger(DisconnectedWatcherTest.class);
final int TIMEOUT = 5000;
private class MyWatcher extends CountdownWatcher {
LinkedBlockingQueue<WatchedEvent> events =
new LinkedBlockingQueue<WatchedEvent>();
public void process(WatchedEvent event) {
super.process(event);
if (event.getType() != Event.EventType.None) {
try {
events.put(event);
} catch (InterruptedException e) {
LOG.warn("ignoring interrupt during event.put");
}
}
}
}
// @see jira issue ZOOKEEPER-961
@Test
public void testChildWatcherAutoResetWithChroot() throws Exception {
ZooKeeper zk1 = createClient();
zk1.create("/ch1", null, Ids.OPEN_ACL_UNSAFE,
CreateMode.PERSISTENT);
MyWatcher watcher = new MyWatcher();
ZooKeeper zk2 = createClient(watcher, hostPort + "/ch1");
zk2.getChildren("/", true );
// this call shouldn't trigger any error or watch
zk1.create("/youdontmatter1", null, Ids.OPEN_ACL_UNSAFE,
CreateMode.PERSISTENT);
// this should trigger the watch
zk1.create("/ch1/youshouldmatter1", null, Ids.OPEN_ACL_UNSAFE,
CreateMode.PERSISTENT);
WatchedEvent e = watcher.events.poll(TIMEOUT, TimeUnit.MILLISECONDS);
Assert.assertNotNull(e);
Assert.assertEquals(EventType.NodeChildrenChanged, e.getType());
Assert.assertEquals("/", e.getPath());
MyWatcher childWatcher = new MyWatcher();
zk2.getChildren("/", childWatcher);
stopServer();
watcher.waitForDisconnected(3000);
startServer();
watcher.waitForConnected(3000);
// this should trigger the watch
zk1.create("/ch1/youshouldmatter2", null, Ids.OPEN_ACL_UNSAFE,
CreateMode.PERSISTENT);
e = childWatcher.events.poll(TIMEOUT, TimeUnit.MILLISECONDS);
Assert.assertNotNull(e);
Assert.assertEquals(EventType.NodeChildrenChanged, e.getType());
Assert.assertEquals("/", e.getPath());
}
@Test
public void testDefaultWatcherAutoResetWithChroot() throws Exception {
ZooKeeper zk1 = createClient();
zk1.create("/ch1", null, Ids.OPEN_ACL_UNSAFE,
CreateMode.PERSISTENT);
MyWatcher watcher = new MyWatcher();
ZooKeeper zk2 = createClient(watcher, hostPort + "/ch1");
zk2.getChildren("/", true );
// this call shouldn't trigger any error or watch
zk1.create("/youdontmatter1", null, Ids.OPEN_ACL_UNSAFE,
CreateMode.PERSISTENT);
// this should trigger the watch
zk1.create("/ch1/youshouldmatter1", null, Ids.OPEN_ACL_UNSAFE,
CreateMode.PERSISTENT);
WatchedEvent e = watcher.events.poll(TIMEOUT, TimeUnit.MILLISECONDS);
Assert.assertNotNull(e);
Assert.assertEquals(EventType.NodeChildrenChanged, e.getType());
Assert.assertEquals("/", e.getPath());
zk2.getChildren("/", true );
stopServer();
watcher.waitForDisconnected(3000);
startServer();
watcher.waitForConnected(3000);
// this should trigger the watch
zk1.create("/ch1/youshouldmatter2", null, Ids.OPEN_ACL_UNSAFE,
CreateMode.PERSISTENT);
e = watcher.events.poll(TIMEOUT, TimeUnit.MILLISECONDS);
Assert.assertNotNull(e);
Assert.assertEquals(EventType.NodeChildrenChanged, e.getType());
Assert.assertEquals("/", e.getPath());
}
@Test
public void testDeepChildWatcherAutoResetWithChroot() throws Exception {
ZooKeeper zk1 = createClient();
zk1.create("/ch1", null, Ids.OPEN_ACL_UNSAFE,
CreateMode.PERSISTENT);
zk1.create("/ch1/here", null, Ids.OPEN_ACL_UNSAFE,
CreateMode.PERSISTENT);
zk1.create("/ch1/here/we", null, Ids.OPEN_ACL_UNSAFE,
CreateMode.PERSISTENT);
zk1.create("/ch1/here/we/are", null, Ids.OPEN_ACL_UNSAFE,
CreateMode.PERSISTENT);
MyWatcher watcher = new MyWatcher();
ZooKeeper zk2 = createClient(watcher, hostPort + "/ch1/here/we");
zk2.getChildren("/are", true );
// this should trigger the watch
zk1.create("/ch1/here/we/are/now", null, Ids.OPEN_ACL_UNSAFE,
CreateMode.PERSISTENT);
WatchedEvent e = watcher.events.poll(TIMEOUT, TimeUnit.MILLISECONDS);
Assert.assertNotNull(e);
Assert.assertEquals(EventType.NodeChildrenChanged, e.getType());
Assert.assertEquals("/are", e.getPath());
MyWatcher childWatcher = new MyWatcher();
zk2.getChildren("/are", childWatcher);
stopServer();
watcher.waitForDisconnected(3000);
startServer();
watcher.waitForConnected(3000);
// this should trigger the watch
zk1.create("/ch1/here/we/are/again", null, Ids.OPEN_ACL_UNSAFE,
CreateMode.PERSISTENT);
e = childWatcher.events.poll(TIMEOUT, TimeUnit.MILLISECONDS);
Assert.assertNotNull(e);
Assert.assertEquals(EventType.NodeChildrenChanged, e.getType());
Assert.assertEquals("/are", e.getPath());
}
}