| /** |
| * 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.locks; |
| |
| import org.apache.curator.framework.CuratorFramework; |
| import org.apache.curator.framework.CuratorFrameworkFactory; |
| import org.apache.curator.retry.RetryOneTime; |
| import org.apache.curator.test.KillSession; |
| import org.apache.zookeeper.CreateMode; |
| import org.testng.Assert; |
| import org.testng.annotations.Test; |
| import java.util.Collection; |
| import java.util.concurrent.Callable; |
| import java.util.concurrent.CountDownLatch; |
| import java.util.concurrent.ExecutorService; |
| import java.util.concurrent.Executors; |
| import java.util.concurrent.Future; |
| import java.util.concurrent.TimeUnit; |
| |
| public class TestInterProcessMutex extends TestInterProcessMutexBase |
| { |
| private static final String LOCK_PATH = LOCK_BASE_PATH + "/our-lock"; |
| |
| @Override |
| protected InterProcessLock makeLock(CuratorFramework client) |
| { |
| return new InterProcessMutex(client, LOCK_PATH); |
| } |
| |
| @Test |
| public void testRevoking() throws Exception |
| { |
| final CuratorFramework client = CuratorFrameworkFactory.newClient(server.getConnectString(), new RetryOneTime(1)); |
| try |
| { |
| client.start(); |
| final InterProcessMutex lock = new InterProcessMutex(client, LOCK_PATH); |
| |
| ExecutorService executorService = Executors.newCachedThreadPool(); |
| |
| final CountDownLatch revokeLatch = new CountDownLatch(1); |
| final CountDownLatch lockLatch = new CountDownLatch(1); |
| Future<Void> f1 = executorService.submit |
| ( |
| new Callable<Void>() |
| { |
| @Override |
| public Void call() throws Exception |
| { |
| RevocationListener<InterProcessMutex> listener = new RevocationListener<InterProcessMutex>() |
| { |
| @Override |
| public void revocationRequested(InterProcessMutex lock) |
| { |
| revokeLatch.countDown(); |
| } |
| }; |
| lock.makeRevocable(listener); |
| lock.acquire(); |
| lockLatch.countDown(); |
| revokeLatch.await(); |
| lock.release(); |
| return null; |
| } |
| } |
| ); |
| |
| Future<Void> f2 = executorService.submit |
| ( |
| new Callable<Void>() |
| { |
| @Override |
| public Void call() throws Exception |
| { |
| Assert.assertTrue(lockLatch.await(10, TimeUnit.SECONDS)); |
| Collection<String> nodes = lock.getParticipantNodes(); |
| Assert.assertEquals(nodes.size(), 1); |
| Revoker.attemptRevoke(client, nodes.iterator().next()); |
| |
| InterProcessMutex l2 = new InterProcessMutex(client, LOCK_PATH); |
| Assert.assertTrue(l2.acquire(5, TimeUnit.SECONDS)); |
| l2.release(); |
| return null; |
| } |
| } |
| ); |
| |
| f2.get(); |
| f1.get(); |
| } |
| finally |
| { |
| client.close(); |
| } |
| } |
| |
| @Test |
| public void testPersistentLock() throws Exception |
| { |
| final CuratorFramework client = CuratorFrameworkFactory.newClient(server.getConnectString(), new RetryOneTime(1)); |
| client.start(); |
| |
| try |
| { |
| final InterProcessMutex lock = new InterProcessMutex(client, LOCK_PATH, new StandardLockInternalsDriver() |
| { |
| @Override |
| public String createsTheLock(CuratorFramework client, String path, byte[] lockNodeBytes) throws Exception |
| { |
| String ourPath; |
| if ( lockNodeBytes != null ) |
| { |
| ourPath = client.create().creatingParentsIfNeeded().withProtection().withMode(CreateMode.PERSISTENT).forPath(path, lockNodeBytes); |
| } |
| else |
| { |
| ourPath = client.create().creatingParentsIfNeeded().withProtection().withMode(CreateMode.PERSISTENT).forPath(path); |
| } |
| return ourPath; |
| } |
| }); |
| |
| // Get a persistent lock |
| lock.acquire(10, TimeUnit.SECONDS); |
| Assert.assertTrue(lock.isAcquiredInThisProcess()); |
| |
| // Kill the session, check that lock node still exists |
| KillSession.kill(client.getZookeeperClient().getZooKeeper(), server.getConnectString()); |
| Assert.assertNotNull(client.checkExists().forPath(LOCK_PATH)); |
| |
| // Release the lock and verify that the actual lock node created no longer exists |
| String actualLockPath = lock.getLockPath(); |
| lock.release(); |
| Assert.assertNull(client.checkExists().forPath(actualLockPath)); |
| } |
| finally |
| { |
| client.close(); |
| } |
| } |
| } |