/**
* 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.recipes.cache;
import com.google.common.io.Closeables;
import org.apache.curator.framework.CuratorFramework;
import org.apache.curator.framework.CuratorFrameworkFactory;
import org.apache.curator.retry.RetryOneTime;
import org.apache.curator.test.InstanceSpec;
import org.apache.curator.test.TestingCluster;
import org.apache.curator.test.Timing;
import org.testng.Assert;
import org.testng.annotations.Test;
import java.util.concurrent.CountDownLatch;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.atomic.AtomicReference;
public class TestPathChildrenCacheInCluster
{
@Test
public void testServerLoss() throws Exception
{
Timing timing = new Timing();
CuratorFramework client = null;
PathChildrenCache cache = null;
TestingCluster cluster = new TestingCluster(3);
try
{
cluster.start();
client = CuratorFrameworkFactory.newClient(cluster.getConnectString(), timing.session(), timing.connection(), new RetryOneTime(1));
client.start();
client.create().creatingParentsIfNeeded().forPath("/test");
cache = new PathChildrenCache(client, "/test", false);
cache.start();
final CountDownLatch resetLatch = new CountDownLatch(1);
final CountDownLatch reconnectLatch = new CountDownLatch(1);
final AtomicReference<CountDownLatch> latch = new AtomicReference<CountDownLatch>(new CountDownLatch(3));
cache.getListenable().addListener
(
new PathChildrenCacheListener()
{
@Override
public void childEvent(CuratorFramework client, PathChildrenCacheEvent event) throws Exception
{
if ( event.getType() == PathChildrenCacheEvent.Type.CONNECTION_SUSPENDED )
{
resetLatch.countDown();
}
else if ( event.getType() == PathChildrenCacheEvent.Type.CONNECTION_RECONNECTED )
{
reconnectLatch.countDown();
}
else if ( event.getType() == PathChildrenCacheEvent.Type.CHILD_ADDED )
{
latch.get().countDown();
}
}
}
);
client.create().forPath("/test/one");
client.create().forPath("/test/two");
client.create().forPath("/test/three");
Assert.assertTrue(latch.get().await(10, TimeUnit.SECONDS));
InstanceSpec connectionInstance = cluster.findConnectionInstance(client.getZookeeperClient().getZooKeeper());
cluster.killServer(connectionInstance);
Assert.assertTrue(timing.awaitLatch(reconnectLatch));
Assert.assertEquals(cache.getCurrentData().size(), 3);
}
finally
{
Closeables.closeQuietly(cache);
Closeables.closeQuietly(client);
Closeables.closeQuietly(cluster);
}
}
}