/**
* 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;
import static org.mockito.Matchers.anyBoolean;
import static org.mockito.Mockito.mock;
import static org.mockito.Mockito.times;
import static org.mockito.Mockito.verify;
import static org.mockito.Mockito.verifyNoMoreInteractions;
import static org.mockito.Mockito.when;
import java.util.concurrent.Callable;
import java.util.concurrent.CountDownLatch;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
import java.util.concurrent.Semaphore;
import java.util.concurrent.TimeUnit;
import org.apache.curator.retry.RetryOneTime;
import org.apache.curator.utils.EnsurePath;
import org.apache.zookeeper.ZooKeeper;
import org.apache.zookeeper.data.Stat;
import org.mockito.Mockito;
import org.mockito.invocation.InvocationOnMock;
import org.mockito.stubbing.Answer;
import org.testng.Assert;
import org.testng.annotations.Test;
public class TestEnsurePath
{
@Test
public void testBasic() throws Exception
{
ZooKeeper client = mock(ZooKeeper.class, Mockito.RETURNS_MOCKS);
CuratorZookeeperClient curator = mock(CuratorZookeeperClient.class);
RetryPolicy retryPolicy = new RetryOneTime(1);
RetryLoop retryLoop = new RetryLoop(retryPolicy, null);
when(curator.getZooKeeper()).thenReturn(client);
when(curator.getRetryPolicy()).thenReturn(retryPolicy);
when(curator.newRetryLoop()).thenReturn(retryLoop);
Stat fakeStat = mock(Stat.class);
when(client.exists(Mockito.<String>any(), anyBoolean())).thenReturn(fakeStat);
EnsurePath ensurePath = new EnsurePath("/one/two/three");
ensurePath.ensure(curator);
verify(client, times(3)).exists(Mockito.<String>any(), anyBoolean());
ensurePath.ensure(curator);
verifyNoMoreInteractions(client);
ensurePath.ensure(curator);
verifyNoMoreInteractions(client);
}
@Test
public void testSimultaneous() throws Exception
{
ZooKeeper client = mock(ZooKeeper.class, Mockito.RETURNS_MOCKS);
RetryPolicy retryPolicy = new RetryOneTime(1);
RetryLoop retryLoop = new RetryLoop(retryPolicy, null);
final CuratorZookeeperClient curator = mock(CuratorZookeeperClient.class);
when(curator.getZooKeeper()).thenReturn(client);
when(curator.getRetryPolicy()).thenReturn(retryPolicy);
when(curator.newRetryLoop()).thenReturn(retryLoop);
final Stat fakeStat = mock(Stat.class);
final CountDownLatch startedLatch = new CountDownLatch(2);
final CountDownLatch finishedLatch = new CountDownLatch(2);
final Semaphore semaphore = new Semaphore(0);
when(client.exists(Mockito.<String>any(), anyBoolean())).thenAnswer
(
new Answer<Stat>()
{
@Override
public Stat answer(InvocationOnMock invocation) throws Throwable
{
semaphore.acquire();
return fakeStat;
}
}
);
final EnsurePath ensurePath = new EnsurePath("/one/two/three");
ExecutorService service = Executors.newCachedThreadPool();
for ( int i = 0; i < 2; ++i )
{
service.submit
(
new Callable<Void>()
{
@Override
public Void call() throws Exception
{
startedLatch.countDown();
ensurePath.ensure(curator);
finishedLatch.countDown();
return null;
}
}
);
}
Assert.assertTrue(startedLatch.await(10, TimeUnit.SECONDS));
semaphore.release(3);
Assert.assertTrue(finishedLatch.await(10, TimeUnit.SECONDS));
verify(client, times(3)).exists(Mockito.<String>any(), anyBoolean());
ensurePath.ensure(curator);
verifyNoMoreInteractions(client);
ensurePath.ensure(curator);
verifyNoMoreInteractions(client);
}
}