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/*
* 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 static org.junit.Assert.assertNotNull;
import static org.junit.Assert.assertNull;
import static org.junit.Assert.assertTrue;
import static org.junit.Assert.fail;
import java.io.IOException;
import java.util.concurrent.CountDownLatch;
import java.util.concurrent.TimeUnit;
import org.apache.zookeeper.CreateMode;
import org.apache.zookeeper.KeeperException;
import org.apache.zookeeper.TestableZooKeeper;
import org.apache.zookeeper.WatchedEvent;
import org.apache.zookeeper.Watcher;
import org.apache.zookeeper.ZooDefs;
import org.junit.Before;
import org.junit.Test;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
public class SessionTimeoutTest extends ClientBase {
protected static final Logger LOG = LoggerFactory.getLogger(SessionTimeoutTest.class);
private TestableZooKeeper zk;
@Before
public void setUp() throws Exception {
super.setUp();
zk = createClient();
}
@Test
public void testSessionExpiration() throws InterruptedException, KeeperException {
final CountDownLatch expirationLatch = new CountDownLatch(1);
Watcher watcher = new Watcher() {
@Override
public void process(WatchedEvent event) {
if (event.getState() == Event.KeeperState.Expired) {
expirationLatch.countDown();
}
}
};
zk.exists("/foo", watcher);
zk.getTestable().injectSessionExpiration();
assertTrue(expirationLatch.await(5, TimeUnit.SECONDS));
boolean gotException = false;
try {
zk.exists("/foo", false);
fail("Should have thrown a SessionExpiredException");
} catch (KeeperException.SessionExpiredException e) {
// correct
gotException = true;
}
assertTrue(gotException);
}
@Test
public void testQueueEvent() throws InterruptedException, KeeperException {
final CountDownLatch eventLatch = new CountDownLatch(1);
Watcher watcher = new Watcher() {
@Override
public void process(WatchedEvent event) {
if (event.getType() == Event.EventType.NodeDataChanged) {
if (event.getPath().equals("/foo/bar")) {
eventLatch.countDown();
}
}
}
};
zk.exists("/foo/bar", watcher);
WatchedEvent event = new WatchedEvent(Watcher.Event.EventType.NodeDataChanged, Watcher.Event.KeeperState.SyncConnected, "/foo/bar");
zk.getTestable().queueEvent(event);
assertTrue(eventLatch.await(5, TimeUnit.SECONDS));
}
/**
* Make sure ephemerals get cleaned up when session disconnects.
*/
@Test
public void testSessionDisconnect() throws KeeperException, InterruptedException, IOException {
zk.create("/sdisconnect", new byte[0], ZooDefs.Ids.OPEN_ACL_UNSAFE, CreateMode.EPHEMERAL);
assertNotNull("Ephemeral node has not been created", zk.exists("/sdisconnect", null));
zk.close();
zk = createClient();
assertNull("Ephemeral node shouldn't exist after client disconnect", zk.exists("/sdisconnect", null));
}
/**
* Make sure ephemerals are kept when session restores.
*/
@Test
public void testSessionRestore() throws KeeperException, InterruptedException, IOException {
zk.create("/srestore", new byte[0], ZooDefs.Ids.OPEN_ACL_UNSAFE, CreateMode.EPHEMERAL);
assertNotNull("Ephemeral node has not been created", zk.exists("/srestore", null));
zk.disconnect();
zk.close();
zk = createClient();
assertNotNull("Ephemeral node should be present when session is restored", zk.exists("/srestore", null));
}
/**
* Make sure ephemerals are kept when server restarts.
*/
@Test
public void testSessionSurviveServerRestart() throws Exception {
zk.create("/sdeath", new byte[0], ZooDefs.Ids.OPEN_ACL_UNSAFE, CreateMode.EPHEMERAL);
assertNotNull("Ephemeral node has not been created", zk.exists("/sdeath", null));
zk.disconnect();
stopServer();
startServer();
zk = createClient();
assertNotNull("Ephemeral node should be present when server restarted", zk.exists("/sdeath", null));
}
}
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