/**
* 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.apache.zookeeper.test.ClientBase.CONNECTION_TIMEOUT;
import static org.apache.zookeeper.test.ClientBase.verifyThreadTerminated;
import java.util.LinkedList;
import junit.framework.TestCase;
import org.apache.log4j.Logger;
import org.apache.zookeeper.CreateMode;
import org.apache.zookeeper.KeeperException;
import org.apache.zookeeper.TestableZooKeeper;
import org.apache.zookeeper.WatchedEvent;
import org.apache.zookeeper.AsyncCallback.DataCallback;
import org.apache.zookeeper.AsyncCallback.StringCallback;
import org.apache.zookeeper.AsyncCallback.VoidCallback;
import org.apache.zookeeper.ZooDefs.Ids;
import org.apache.zookeeper.data.Stat;
import org.apache.zookeeper.test.ClientBase.CountdownWatcher;
import org.junit.After;
import org.junit.Before;
import org.junit.Test;
public class AsyncHammerTest extends TestCase
implements StringCallback, VoidCallback, DataCallback
{
private static final Logger LOG = Logger.getLogger(AsyncHammerTest.class);
private QuorumBase qb = new QuorumBase();
private volatile boolean bang;
@Before
@Override
protected void setUp() throws Exception {
LOG.info("STARTING " + getName());
qb.setUp();
}
protected void restart() throws Exception {
LOG.info("RESTARTING " + getName());
qb.tearDown();
// don't call setup - we don't want to reassign ports/dirs, etc...
JMXEnv.setUp();
qb.startServers();
}
@After
@Override
protected void tearDown() throws Exception {
LOG.info("Test clients shutting down");
qb.tearDown();
LOG.info("FINISHED " + getName());
}
/**
* Create /test- sequence nodes asynchronously, max 30 outstanding
*/
class HammerThread extends Thread implements StringCallback, VoidCallback {
private static final int MAX_OUTSTANDING = 30;
private TestableZooKeeper zk;
private int outstanding;
private volatile boolean failed = false;
public HammerThread(String name) {
super(name);
}
public void run() {
try {
CountdownWatcher watcher = new CountdownWatcher();
zk = new TestableZooKeeper(qb.hostPort, CONNECTION_TIMEOUT,
watcher);
watcher.waitForConnected(CONNECTION_TIMEOUT);
while(bang) {
incOutstanding(); // before create otw race
zk.create("/test-", new byte[0], Ids.OPEN_ACL_UNSAFE,
CreateMode.PERSISTENT_SEQUENTIAL, this, null);
}
} catch (InterruptedException e) {
if (bang) {
LOG.error("sanity check failed!!!"); // sanity check
return;
}
} catch (Exception e) {
LOG.error("Client create operation failed", e);
return;
} finally {
if (zk != null) {
try {
zk.close();
if (!zk.testableWaitForShutdown(CONNECTION_TIMEOUT)) {
failed = true;
LOG.error("Client did not shutdown");
}
} catch (InterruptedException e) {
LOG.info("Interrupted", e);
}
}
}
}
private synchronized void incOutstanding() throws InterruptedException {
outstanding++;
while(outstanding > MAX_OUTSTANDING) {
wait();
}
}
private synchronized void decOutstanding() {
outstanding--;
assertTrue("outstanding >= 0", outstanding >= 0);
notifyAll();
}
public void process(WatchedEvent event) {
// ignore for purposes of this test
}
public void processResult(int rc, String path, Object ctx, String name) {
if (rc != KeeperException.Code.OK.intValue()) {
if (bang) {
failed = true;
LOG.error("Create failed for 0x"
+ Long.toHexString(zk.getSessionId())
+ "with rc:" + rc + " path:" + path);
}
decOutstanding();
return;
}
try {
decOutstanding();
zk.delete(name, -1, this, null);
} catch (Exception e) {
if (bang) {
failed = true;
LOG.error("Client delete failed", e);
}
}
}
public void processResult(int rc, String path, Object ctx) {
if (rc != KeeperException.Code.OK.intValue()) {
if (bang) {
failed = true;
LOG.error("Delete failed for 0x"
+ Long.toHexString(zk.getSessionId())
+ "with rc:" + rc + " path:" + path);
}
}
}
}
@Test
public void testHammer() throws Exception {
bang = true;
LOG.info("Starting hammers");
HammerThread[] hammers = new HammerThread[100];
for (int i = 0; i < hammers.length; i++) {
hammers[i] = new HammerThread("HammerThread-" + i);
hammers[i].start();
}
LOG.info("Started hammers");
Thread.sleep(5000); // allow the clients to run for max 5sec
bang = false;
LOG.info("Stopping hammers");
for (int i = 0; i < hammers.length; i++) {
hammers[i].interrupt();
verifyThreadTerminated(hammers[i], 60000);
assertFalse(hammers[i].failed);
}
// before restart
LOG.info("Hammers stopped, verifying consistency");
qb.verifyRootOfAllServersMatch(qb.hostPort);
restart();
// after restart
LOG.info("Verifying hammers 2");
qb.verifyRootOfAllServersMatch(qb.hostPort);
}
@Test
public void testObserversHammer() throws Exception {
qb.tearDown();
qb.setUp(true);
bang = true;
Thread[] hammers = new Thread[100];
for (int i = 0; i < hammers.length; i++) {
hammers[i] = new HammerThread("HammerThread-" + i);
hammers[i].start();
}
Thread.sleep(5000); // allow the clients to run for max 5sec
bang = false;
for (int i = 0; i < hammers.length; i++) {
hammers[i].interrupt();
verifyThreadTerminated(hammers[i], 60000);
}
// before restart
qb.verifyRootOfAllServersMatch(qb.hostPort);
}
@SuppressWarnings("unchecked")
public void processResult(int rc, String path, Object ctx, String name) {
synchronized(ctx) {
((LinkedList<Integer>)ctx).add(rc);
ctx.notifyAll();
}
}
@SuppressWarnings("unchecked")
public void processResult(int rc, String path, Object ctx) {
synchronized(ctx) {
((LinkedList<Integer>)ctx).add(rc);
ctx.notifyAll();
}
}
@SuppressWarnings("unchecked")
public void processResult(int rc, String path, Object ctx, byte[] data,
Stat stat) {
synchronized(ctx) {
((LinkedList<Integer>)ctx).add(rc);
ctx.notifyAll();
}
}
}