/**
* 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.imps;
import org.apache.curator.framework.CuratorFramework;
import org.apache.curator.framework.CuratorFrameworkFactory;
import org.apache.curator.framework.api.BackgroundCallback;
import org.apache.curator.framework.api.CuratorEvent;
import org.apache.curator.framework.imps.FailedDeleteManager.FailedDeleteManagerListener;
import org.apache.curator.framework.state.ConnectionState;
import org.apache.curator.framework.state.ConnectionStateListener;
import org.apache.curator.retry.ExponentialBackoffRetry;
import org.apache.curator.retry.RetryOneTime;
import org.apache.curator.test.BaseClassForTests;
import org.apache.curator.test.Timing;
import org.apache.curator.utils.CloseableUtils;
import org.apache.zookeeper.KeeperException;
import org.apache.zookeeper.KeeperException.NoNodeException;
import org.testng.Assert;
import org.testng.annotations.Test;
import java.util.concurrent.CountDownLatch;
import java.util.concurrent.Semaphore;
import java.util.concurrent.atomic.AtomicBoolean;
public class TestFailedDeleteManager extends BaseClassForTests
{
@Test
public void testLostSession() throws Exception
{
Timing timing = new Timing();
CuratorFramework client = CuratorFrameworkFactory.newClient(server.getConnectString(), timing.session(), timing.connection(), new ExponentialBackoffRetry(100, 3));
try
{
client.start();
client.create().forPath("/test-me");
final CountDownLatch latch = new CountDownLatch(1);
final Semaphore semaphore = new Semaphore(0);
ConnectionStateListener listener = new ConnectionStateListener()
{
@Override
public void stateChanged(CuratorFramework client, ConnectionState newState)
{
if ( (newState == ConnectionState.LOST) || (newState == ConnectionState.SUSPENDED) )
{
semaphore.release();
}
else if ( newState == ConnectionState.RECONNECTED )
{
latch.countDown();
}
}
};
client.getConnectionStateListenable().addListener(listener);
server.stop();
Assert.assertTrue(timing.acquireSemaphore(semaphore));
try
{
client.delete().guaranteed().forPath("/test-me");
Assert.fail();
}
catch ( KeeperException.ConnectionLossException e )
{
// expected
}
Assert.assertTrue(timing.acquireSemaphore(semaphore));
timing.sleepABit();
server.restart();
Assert.assertTrue(timing.awaitLatch(latch));
timing.sleepABit();
Assert.assertNull(client.checkExists().forPath("/test-me"));
}
finally
{
CloseableUtils.closeQuietly(client);
}
}
@Test
public void testWithNamespaceAndLostSession() throws Exception
{
Timing timing = new Timing();
CuratorFramework client = CuratorFrameworkFactory.builder().connectString(server.getConnectString())
.sessionTimeoutMs(timing.session())
.connectionTimeoutMs(timing.connection())
.retryPolicy(new ExponentialBackoffRetry(100, 3))
.namespace("aisa")
.build();
try
{
client.start();
client.create().forPath("/test-me");
final CountDownLatch latch = new CountDownLatch(1);
final Semaphore semaphore = new Semaphore(0);
ConnectionStateListener listener = new ConnectionStateListener()
{
@Override
public void stateChanged(CuratorFramework client, ConnectionState newState)
{
if ( (newState == ConnectionState.LOST) || (newState == ConnectionState.SUSPENDED) )
{
semaphore.release();
}
else if ( newState == ConnectionState.RECONNECTED )
{
latch.countDown();
}
}
};
client.getConnectionStateListenable().addListener(listener);
server.stop();
Assert.assertTrue(timing.acquireSemaphore(semaphore));
try
{
client.delete().guaranteed().forPath("/test-me");
Assert.fail();
}
catch ( KeeperException.ConnectionLossException e )
{
// expected
}
Assert.assertTrue(timing.acquireSemaphore(semaphore));
timing.sleepABit();
server.restart();
Assert.assertTrue(timing.awaitLatch(latch));
timing.sleepABit();
Assert.assertNull(client.checkExists().forPath("/test-me"));
}
finally
{
CloseableUtils.closeQuietly(client);
}
}
@Test
public void testWithNamespaceAndLostSessionAlt() throws Exception
{
Timing timing = new Timing();
CuratorFramework client = CuratorFrameworkFactory.builder().connectString(server.getConnectString())
.sessionTimeoutMs(timing.session())
.connectionTimeoutMs(timing.connection())
.retryPolicy(new ExponentialBackoffRetry(100, 3))
.build();
try
{
client.start();
CuratorFramework namespaceClient = client.usingNamespace("foo");
namespaceClient.create().forPath("/test-me");
final CountDownLatch latch = new CountDownLatch(1);
final Semaphore semaphore = new Semaphore(0);
ConnectionStateListener listener = new ConnectionStateListener()
{
@Override
public void stateChanged(CuratorFramework client, ConnectionState newState)
{
if ( (newState == ConnectionState.LOST) || (newState == ConnectionState.SUSPENDED) )
{
semaphore.release();
}
else if ( newState == ConnectionState.RECONNECTED )
{
latch.countDown();
}
}
};
namespaceClient.getConnectionStateListenable().addListener(listener);
server.stop();
Assert.assertTrue(timing.acquireSemaphore(semaphore));
try
{
namespaceClient.delete().guaranteed().forPath("/test-me");
Assert.fail();
}
catch ( KeeperException.ConnectionLossException e )
{
// expected
}
Assert.assertTrue(timing.acquireSemaphore(semaphore));
timing.sleepABit();
server.restart();
Assert.assertTrue(timing.awaitLatch(latch));
timing.sleepABit();
Assert.assertNull(namespaceClient.checkExists().forPath("/test-me"));
}
finally
{
CloseableUtils.closeQuietly(client);
}
}
@Test
public void testBasic() throws Exception
{
final String PATH = "/one/two/three";
Timing timing = new Timing();
CuratorFrameworkFactory.Builder builder = CuratorFrameworkFactory.builder();
builder.connectString(server.getConnectString()).retryPolicy(new RetryOneTime(1)).connectionTimeoutMs(timing.connection()).sessionTimeoutMs(timing.session());
CuratorFrameworkImpl client = new CuratorFrameworkImpl(builder);
client.start();
try
{
client.create().creatingParentsIfNeeded().forPath(PATH);
Assert.assertNotNull(client.checkExists().forPath(PATH));
server.stop(); // cause the next delete to fail
try
{
client.delete().forPath(PATH);
Assert.fail();
}
catch ( KeeperException.ConnectionLossException e )
{
// expected
}
server.restart();
Assert.assertNotNull(client.checkExists().forPath(PATH));
server.stop(); // cause the next delete to fail
try
{
client.delete().guaranteed().forPath(PATH);
Assert.fail();
}
catch ( KeeperException.ConnectionLossException e )
{
// expected
}
server.restart();
final int TRIES = 5;
for ( int i = 0; i < TRIES; ++i )
{
if ( client.checkExists().forPath(PATH) != null )
{
timing.sleepABit();
}
}
Assert.assertNull(client.checkExists().forPath(PATH));
}
finally
{
CloseableUtils.closeQuietly(client);
}
}
@Test
public void testGuaranteedDeleteOnNonExistentNodeInForeground() throws Exception
{
CuratorFramework client = CuratorFrameworkFactory.newClient(server.getConnectString(), new RetryOneTime(1));
client.start();
final AtomicBoolean pathAdded = new AtomicBoolean(false);
((CuratorFrameworkImpl)client).getFailedDeleteManager().debugListener = new FailedDeleteManagerListener()
{
@Override
public void pathAddedForDelete(String path)
{
pathAdded.set(true);
}
};
try
{
client.delete().guaranteed().forPath("/nonexistent");
Assert.fail();
}
catch(NoNodeException e)
{
//Exception is expected, the delete should not be retried
Assert.assertFalse(pathAdded.get());
}
finally
{
client.close();
}
}
@Test
public void testGuaranteedDeleteOnNonExistentNodeInBackground() throws Exception
{
CuratorFramework client = CuratorFrameworkFactory.newClient(server.getConnectString(), new RetryOneTime(1));
client.start();
final AtomicBoolean pathAdded = new AtomicBoolean(false);
((CuratorFrameworkImpl)client).getFailedDeleteManager().debugListener = new FailedDeleteManagerListener()
{
@Override
public void pathAddedForDelete(String path)
{
pathAdded.set(true);
}
};
final CountDownLatch backgroundLatch = new CountDownLatch(1);
BackgroundCallback background = new BackgroundCallback()
{
@Override
public void processResult(CuratorFramework client, CuratorEvent event)
throws Exception
{
backgroundLatch.countDown();
}
};
try
{
client.delete().guaranteed().inBackground(background).forPath("/nonexistent");
backgroundLatch.await();
//Exception is expected, the delete should not be retried
Assert.assertFalse(pathAdded.get());
}
finally
{
client.close();
}
}
}