| /* |
| * 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.util; |
| |
| import java.util.concurrent.Callable; |
| import java.util.concurrent.CountDownLatch; |
| import org.apache.ignite.internal.IgniteInternalFuture; |
| import org.apache.ignite.internal.util.GridSpinReadWriteLock; |
| import org.apache.ignite.internal.util.typedef.internal.U; |
| import org.apache.ignite.testframework.junits.common.GridCommonAbstractTest; |
| import org.junit.Test; |
| |
| /** |
| * |
| */ |
| public class GridSpinReadWriteLockSelfTest extends GridCommonAbstractTest { |
| /** Constructor. */ |
| public GridSpinReadWriteLockSelfTest() { |
| super(false); |
| } |
| |
| /** |
| * @throws Exception If any error occurs. |
| */ |
| @Test |
| public void testWriteLockReentry() throws Exception { |
| GridSpinReadWriteLock lock = new GridSpinReadWriteLock(); |
| |
| lock.writeLock(); |
| |
| lock.writeLock(); |
| |
| boolean b = lock.tryWriteLock(); |
| |
| assert b; |
| } |
| |
| /** |
| * @throws Exception If any error occurs. |
| */ |
| @Test |
| public void testReadLockReentry() throws Exception { |
| final GridSpinReadWriteLock lock = new GridSpinReadWriteLock(); |
| |
| lock.readLock(); |
| |
| final CountDownLatch latch = new CountDownLatch(1); |
| |
| IgniteInternalFuture<?> f = multithreadedAsync( |
| new Callable<Object>() { |
| @Override public Object call() throws Exception { |
| assert !lock.tryWriteLock(); |
| |
| info("Before write lock."); |
| |
| latch.countDown(); |
| |
| lock.writeLock(); |
| |
| info("After write lock."); |
| |
| return null; |
| } |
| }, 1); |
| |
| latch.await(); |
| |
| U.sleep(100); |
| |
| lock.readLock(); |
| |
| assert lock.tryReadLock(); |
| |
| lock.readUnlock(); |
| lock.readUnlock(); |
| lock.readUnlock(); |
| |
| f.get(); |
| } |
| |
| /** |
| * @throws Exception If any error occurs. |
| */ |
| @Test |
| public void testLockDowngrade() throws Exception { |
| GridSpinReadWriteLock lock = new GridSpinReadWriteLock(); |
| |
| // Read lock while holding write lock. |
| lock.writeLock(); |
| |
| lock.readLock(); |
| |
| lock.readUnlock(); |
| |
| lock.writeUnlock(); |
| |
| // Downgrade from write to read lock. |
| lock.writeLock(); |
| |
| lock.readLock(); |
| |
| lock.writeUnlock(); |
| |
| assert !lock.tryWriteLock(); |
| |
| lock.readUnlock(); |
| |
| // Test that we can operate with write locks now. |
| lock.writeLock(); |
| lock.writeUnlock(); |
| } |
| |
| /** |
| * @throws Exception If any error occurs. |
| */ |
| @Test |
| public void testMonitorState() throws Exception { |
| GridSpinReadWriteLock lock = new GridSpinReadWriteLock(); |
| |
| try { |
| lock.readUnlock(); |
| } |
| catch (IllegalMonitorStateException e) { |
| info("Caught expected exception: " + e); |
| } |
| |
| try { |
| lock.writeUnlock(); |
| } |
| catch (IllegalMonitorStateException e) { |
| info("Caught expected exception: " + e); |
| } |
| } |
| } |