| /** |
| * 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.activemq.thread; |
| |
| 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.SynchronousQueue; |
| import java.util.concurrent.ThreadFactory; |
| import java.util.concurrent.ThreadPoolExecutor; |
| import java.util.concurrent.TimeUnit; |
| import java.util.concurrent.TimeoutException; |
| import java.util.concurrent.atomic.AtomicInteger; |
| |
| import junit.framework.TestCase; |
| |
| public class PooledTaskRunnerTest extends TestCase { |
| private ExecutorService executor; |
| |
| @Override |
| protected void setUp() throws Exception { |
| super.setUp(); |
| executor = Executors.newCachedThreadPool(new IgnoreUncaughtExceptionThreadFactory()); |
| } |
| |
| @Override |
| protected void tearDown() throws Exception { |
| executor.shutdownNow(); |
| |
| super.tearDown(); |
| } |
| |
| public void testNormalBehavior() throws Exception { |
| final CountDownLatch latch = new CountDownLatch( 1 ); |
| |
| PooledTaskRunner runner = new PooledTaskRunner( executor, new Task() { |
| public boolean iterate() { |
| latch.countDown(); |
| |
| return false; |
| } |
| }, 1 ); |
| |
| runner.wakeup(); |
| |
| assertTrue( latch.await( 1, TimeUnit.SECONDS ) ); |
| |
| runner.shutdown(); |
| } |
| |
| |
| public void testWakeupResultsInThreadSafeCalls() throws Exception { |
| |
| ThreadPoolExecutor executor = new ThreadPoolExecutor(0, Integer.MAX_VALUE, 10, TimeUnit.SECONDS, new SynchronousQueue<Runnable>(), new ThreadFactory() { |
| public Thread newThread(Runnable runnable) { |
| Thread thread = new Thread(runnable, getName()); |
| thread.setDaemon(true); |
| thread.setPriority(Thread.NORM_PRIORITY); |
| return thread; |
| } |
| }); |
| final CountDownLatch doneLatch = new CountDownLatch( 100 ); |
| final AtomicInteger clashCount = new AtomicInteger(); |
| final AtomicInteger count = new AtomicInteger(); |
| |
| |
| final PooledTaskRunner runner = new PooledTaskRunner(executor, new Task() { |
| String threadUnSafeVal = null; |
| public boolean iterate() { |
| if (threadUnSafeVal != null) { |
| clashCount.incrementAndGet(); |
| } |
| threadUnSafeVal = Thread.currentThread().getName(); |
| count.incrementAndGet(); |
| doneLatch.countDown(); |
| if (!threadUnSafeVal.equals(Thread.currentThread().getName())) { |
| clashCount.incrementAndGet(); |
| } |
| threadUnSafeVal = null; |
| return false; |
| } |
| }, 1 ); |
| |
| Runnable doWakeup = new Runnable() { |
| public void run() { |
| try { |
| runner.wakeup(); |
| } catch (InterruptedException ignored) { |
| } |
| } |
| }; |
| |
| final int iterations = 1000; |
| for (int i=0; i< iterations; i++) { |
| if (i%100 == 0) { |
| Thread.sleep(10); |
| } |
| executor.execute(doWakeup); |
| } |
| |
| doneLatch.await(20, TimeUnit.SECONDS); |
| assertEquals("thread safety clash", 0, clashCount.get()); |
| assertTrue("called more than once", count.get() > 1); |
| runner.shutdown(); |
| } |
| |
| public void testShutsDownAfterRunnerFailure() throws Exception { |
| Future<Object> future = executor.submit( new Callable<Object>() { |
| public Object call() throws Exception { |
| final CountDownLatch latch = new CountDownLatch( 1 ); |
| |
| PooledTaskRunner runner = new PooledTaskRunner( executor, new Task() { |
| public boolean iterate() { |
| latch.countDown(); |
| |
| throw new RuntimeException(); |
| } |
| }, 1 ); |
| |
| runner.wakeup(); |
| |
| assertTrue( latch.await( 1, TimeUnit.SECONDS ) ); |
| |
| runner.shutdown(); |
| |
| return null; |
| } |
| } ); |
| |
| try { |
| future.get( 5, TimeUnit.SECONDS ); |
| } catch( TimeoutException e ) { |
| fail( "TaskRunner did not shut down cleanly" ); |
| } |
| } |
| |
| class IgnoreUncaughtExceptionThreadFactory implements ThreadFactory, Thread.UncaughtExceptionHandler { |
| ThreadFactory threadFactory = Executors.defaultThreadFactory(); |
| public Thread newThread(Runnable r) { |
| Thread thread = threadFactory.newThread(r); |
| thread.setUncaughtExceptionHandler(this); |
| return thread; |
| } |
| |
| public void uncaughtException(Thread t, Throwable e) { |
| // ignore ie: no printStackTrace that would sully the test console |
| } |
| } |
| } |