| /** |
| * 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 |
| * <p> |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * <p> |
| * 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.hadoop.ozone.lock; |
| |
| import org.apache.hadoop.hdds.conf.OzoneConfiguration; |
| import org.junit.Assert; |
| import org.junit.Test; |
| |
| import java.util.concurrent.atomic.AtomicBoolean; |
| |
| /** |
| * Test-cases to test LockManager. |
| */ |
| public class TestLockManager { |
| |
| @Test(timeout = 1000) |
| public void testWriteLockWithDifferentResource() { |
| final LockManager<String> manager = |
| new LockManager<>(new OzoneConfiguration()); |
| manager.writeLock("/resourceOne"); |
| // This should work, as they are different resource. |
| manager.writeLock("/resourceTwo"); |
| manager.writeUnlock("/resourceOne"); |
| manager.writeUnlock("/resourceTwo"); |
| Assert.assertTrue(true); |
| } |
| |
| @Test |
| public void testWriteLockWithSameResource() throws Exception { |
| final LockManager<String> manager = |
| new LockManager<>(new OzoneConfiguration()); |
| final AtomicBoolean gotLock = new AtomicBoolean(false); |
| manager.writeLock("/resourceOne"); |
| new Thread(() -> { |
| manager.writeLock("/resourceOne"); |
| gotLock.set(true); |
| manager.writeUnlock("/resourceOne"); |
| }).start(); |
| // Let's give some time for the other thread to run |
| Thread.sleep(100); |
| // Since the other thread is trying to get write lock on same object, |
| // it will wait. |
| Assert.assertFalse(gotLock.get()); |
| manager.writeUnlock("/resourceOne"); |
| // Since we have released the write lock, the other thread should have |
| // the lock now |
| // Let's give some time for the other thread to run |
| Thread.sleep(100); |
| Assert.assertTrue(gotLock.get()); |
| } |
| |
| @Test(timeout = 1000) |
| public void testReadLockWithDifferentResource() { |
| final LockManager<String> manager = |
| new LockManager<>(new OzoneConfiguration()); |
| manager.readLock("/resourceOne"); |
| manager.readLock("/resourceTwo"); |
| manager.readUnlock("/resourceOne"); |
| manager.readUnlock("/resourceTwo"); |
| Assert.assertTrue(true); |
| } |
| |
| @Test |
| public void testReadLockWithSameResource() throws Exception { |
| final LockManager<String> manager = |
| new LockManager<>(new OzoneConfiguration()); |
| final AtomicBoolean gotLock = new AtomicBoolean(false); |
| manager.readLock("/resourceOne"); |
| new Thread(() -> { |
| manager.readLock("/resourceOne"); |
| gotLock.set(true); |
| manager.readUnlock("/resourceOne"); |
| }).start(); |
| // Let's give some time for the other thread to run |
| Thread.sleep(100); |
| // Since the new thread is trying to get read lock, it should work. |
| Assert.assertTrue(gotLock.get()); |
| manager.readUnlock("/resourceOne"); |
| } |
| |
| @Test |
| public void testWriteReadLockWithSameResource() throws Exception { |
| final LockManager<String> manager = |
| new LockManager<>(new OzoneConfiguration()); |
| final AtomicBoolean gotLock = new AtomicBoolean(false); |
| manager.writeLock("/resourceOne"); |
| new Thread(() -> { |
| manager.readLock("/resourceOne"); |
| gotLock.set(true); |
| manager.readUnlock("/resourceOne"); |
| }).start(); |
| // Let's give some time for the other thread to run |
| Thread.sleep(100); |
| // Since the other thread is trying to get read lock on same object, |
| // it will wait. |
| Assert.assertFalse(gotLock.get()); |
| manager.writeUnlock("/resourceOne"); |
| // Since we have released the write lock, the other thread should have |
| // the lock now |
| // Let's give some time for the other thread to run |
| Thread.sleep(100); |
| Assert.assertTrue(gotLock.get()); |
| } |
| |
| @Test |
| public void testReadWriteLockWithSameResource() throws Exception { |
| final LockManager<String> manager = |
| new LockManager<>(new OzoneConfiguration()); |
| final AtomicBoolean gotLock = new AtomicBoolean(false); |
| manager.readLock("/resourceOne"); |
| new Thread(() -> { |
| manager.writeLock("/resourceOne"); |
| gotLock.set(true); |
| manager.writeUnlock("/resourceOne"); |
| }).start(); |
| // Let's give some time for the other thread to run |
| Thread.sleep(100); |
| // Since the other thread is trying to get write lock on same object, |
| // it will wait. |
| Assert.assertFalse(gotLock.get()); |
| manager.readUnlock("/resourceOne"); |
| // Since we have released the read lock, the other thread should have |
| // the lock now |
| // Let's give some time for the other thread to run |
| Thread.sleep(100); |
| Assert.assertTrue(gotLock.get()); |
| } |
| |
| @Test |
| public void testMultiReadWriteLockWithSameResource() throws Exception { |
| final LockManager<String> manager = |
| new LockManager<>(new OzoneConfiguration()); |
| final AtomicBoolean gotLock = new AtomicBoolean(false); |
| manager.readLock("/resourceOne"); |
| manager.readLock("/resourceOne"); |
| new Thread(() -> { |
| manager.writeLock("/resourceOne"); |
| gotLock.set(true); |
| manager.writeUnlock("/resourceOne"); |
| }).start(); |
| // Let's give some time for the other thread to run |
| Thread.sleep(100); |
| // Since the other thread is trying to get write lock on same object, |
| // it will wait. |
| Assert.assertFalse(gotLock.get()); |
| manager.readUnlock("/resourceOne"); |
| //We have only released one read lock, we still hold another read lock. |
| Thread.sleep(100); |
| Assert.assertFalse(gotLock.get()); |
| manager.readUnlock("/resourceOne"); |
| // Since we have released the read lock, the other thread should have |
| // the lock now |
| // Let's give some time for the other thread to run |
| Thread.sleep(100); |
| Assert.assertTrue(gotLock.get()); |
| } |
| |
| } |