| /* |
| * 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.ignite.jvmtest; |
| |
| import java.util.concurrent.Callable; |
| import java.util.concurrent.locks.ReadWriteLock; |
| import java.util.concurrent.locks.ReentrantReadWriteLock; |
| import org.apache.ignite.internal.IgniteInternalFuture; |
| import org.apache.ignite.internal.util.typedef.X; |
| import org.apache.ignite.testframework.GridTestUtils; |
| import org.jetbrains.annotations.Nullable; |
| import org.junit.Test; |
| |
| /** |
| * JDK read write lock test. |
| */ |
| public class ReadWriteLockMultiThreadedTest { |
| /** |
| * @throws Exception If failed. |
| */ |
| @SuppressWarnings({"LockAcquiredButNotSafelyReleased"}) |
| @Test |
| public void testReadThenWriteLockAcquire() throws Exception { |
| ReadWriteLock lock = new ReentrantReadWriteLock(); |
| |
| lock.readLock().lock(); |
| |
| lock.writeLock().lock(); |
| } |
| |
| /** |
| * |
| */ |
| @Test |
| public void testNotOwnedLockRelease() { |
| ReadWriteLock lock = new ReentrantReadWriteLock(); |
| |
| lock.readLock().unlock(); |
| } |
| |
| /** |
| * @throws Exception If failed. |
| */ |
| @SuppressWarnings({"LockAcquiredButNotSafelyReleased"}) |
| @Test |
| public void testWriteLockAcquire() throws Exception { |
| final ReadWriteLock lock = new ReentrantReadWriteLock(); |
| |
| lock.readLock().lock(); |
| |
| X.println("Read lock acquired."); |
| |
| IgniteInternalFuture fut1 = GridTestUtils.runMultiThreadedAsync( |
| new Callable<Object>() { |
| @Nullable @Override public Object call() throws Exception { |
| X.println("Attempting to acquire write lock: " + lock); |
| |
| lock.writeLock().lock(); |
| |
| try { |
| X.println("Write lock acquired: " + lock); |
| |
| return null; |
| } |
| finally { |
| lock.writeLock().unlock(); |
| } |
| } |
| }, |
| 1, |
| "write-lock" |
| ); |
| |
| Thread.sleep(2000); |
| |
| IgniteInternalFuture fut2 = GridTestUtils.runMultiThreadedAsync( |
| new Callable<Object>() { |
| @Nullable @Override public Object call() throws Exception { |
| X.println("Attempting to acquire read lock: " + lock); |
| |
| lock.readLock().lock(); |
| |
| try { |
| X.println("Read lock acquired: " + lock); |
| |
| return null; |
| } |
| finally { |
| lock.readLock().unlock(); |
| } |
| } |
| }, |
| 1, |
| "read-lock" |
| ); |
| |
| Thread.sleep(2000); |
| |
| X.println(">>> Dump threads now! <<<"); |
| |
| Thread.sleep(15 * 1000); |
| |
| X.println("Read lock released: " + lock); |
| |
| lock.readLock().unlock(); |
| |
| fut1.get(); |
| fut2.get(); |
| } |
| |
| /** |
| * @throws Exception If failed. |
| */ |
| @SuppressWarnings({"LockAcquiredButNotSafelyReleased"}) |
| @Test |
| public void testReadLockAcquire() throws Exception { |
| final ReadWriteLock lock = new ReentrantReadWriteLock(); |
| |
| lock.writeLock().lock(); |
| |
| X.println("Write lock acquired: " + lock); |
| |
| IgniteInternalFuture fut = GridTestUtils.runMultiThreadedAsync( |
| new Callable<Object>() { |
| @Nullable @Override public Object call() throws Exception { |
| X.println("Attempting to acquire read lock: " + lock); |
| |
| lock.readLock().lock(); |
| |
| try { |
| X.println("Read lock acquired: " + lock); |
| |
| return null; |
| } |
| finally { |
| lock.readLock().unlock(); |
| } |
| } |
| }, |
| 1, |
| "read-lock" |
| ); |
| |
| Thread.sleep(2000); |
| |
| X.println(">>> Dump threads now! <<<"); |
| |
| Thread.sleep(15 * 1000); |
| |
| X.println("Write lock released."); |
| |
| lock.writeLock().unlock(); |
| |
| fut.get(); |
| } |
| |
| /** |
| * @throws Exception If failed. |
| */ |
| @SuppressWarnings({"LockAcquiredButNotSafelyReleased"}) |
| @Test |
| public void testTryWriteLock() throws Exception { |
| final ReadWriteLock lock = new ReentrantReadWriteLock(); |
| |
| lock.readLock().lock(); |
| |
| X.println("Read lock acquired."); |
| |
| IgniteInternalFuture fut = GridTestUtils.runMultiThreadedAsync( |
| new Callable<Object>() { |
| @Nullable @Override public Object call() throws Exception { |
| boolean res = lock.writeLock().tryLock(); |
| |
| X.println("Attempting to try write lock: " + res); |
| |
| try { |
| return null; |
| } |
| finally { |
| if (res) |
| lock.writeLock().unlock(); |
| } |
| } |
| }, |
| 1, |
| "write-lock" |
| ); |
| |
| Thread.sleep(2000); |
| |
| X.println("Read lock released: " + lock); |
| |
| lock.readLock().unlock(); |
| |
| fut.get(); |
| } |
| } |