/**
* Copyright (C) 2012 FuseSource, Inc.
* http://fusesource.com
*
* Licensed 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.fusesource.hawtdispatch;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
import java.util.concurrent.CountDownLatch;
import java.util.concurrent.TimeUnit;
import org.fusesource.hawtdispatch.internal.DispatcherConfig;
import org.fusesource.hawtdispatch.internal.HawtDispatcher;
import org.junit.Assert;
import org.junit.Test;
/**
* A testcase for HawtDispatcher.
*/
public class DispatcherTest {
@Test
public void testHawtDispatcherShutdown() throws InterruptedException {
int threadCount = Thread.currentThread().getThreadGroup().activeCount();
Thread[] before = new Thread[threadCount];
Thread.currentThread().getThreadGroup().enumerate(before);
HawtDispatcher dispatcher = new DispatcherConfig().createDispatcher();
System.out.println("Shutting down HawtDispatcher...");
dispatcher.shutdown();
Thread.sleep(1000);
threadCount = Thread.currentThread().getThreadGroup().activeCount();
Thread[] after = new Thread[threadCount];
Thread.currentThread().getThreadGroup().enumerate(after);
List<Thread> afterList = new ArrayList<Thread>(Arrays.asList(after));
for (Thread t : before) {
afterList.remove(t);
}
if (!afterList.isEmpty()) {
Assert.fail("Detected thread leak after HawtDispatch.shutdown() - remaining threads: " + afterList.toString());
}
System.out.println("Restarting HawtDispatcher...");
dispatcher.restart();
final DispatchQueue queue = dispatcher.getGlobalQueue();
final CountDownLatch counter = new CountDownLatch(1);
queue.execute(new Task() {
@Override
public void run() {
counter.countDown();
}
});
counter.await(1000, TimeUnit.MILLISECONDS);
if (counter.getCount() != 0) {
Assert.fail("A task was not executed via global queue after HawtDispatcher shutdown&restart");
}
}
@Test
public void testDefaultDispatcherShutdown() throws InterruptedException {
int threadCount = Thread.currentThread().getThreadGroup().activeCount();
Thread[] before = new Thread[threadCount];
Thread.currentThread().getThreadGroup().enumerate(before);
Dispatch.getGlobalQueue();
System.out.println("Shutting down default dispatcher...");
Dispatch.shutdown();
Thread.sleep(1000);
threadCount = Thread.currentThread().getThreadGroup().activeCount();
Thread[] after = new Thread[threadCount];
Thread.currentThread().getThreadGroup().enumerate(after);
List<Thread> afterList = new ArrayList<Thread>(Arrays.asList(after));
for (Thread t : before) {
afterList.remove(t);
}
if (!afterList.isEmpty()) {
Assert.fail("Detected thread leak after Dispatch.shutdown() - remaining threads: " + afterList.toString());
}
System.out.println("Restarting default dispatcher...");
Dispatch.restart();
final DispatchQueue queue = Dispatch.getGlobalQueue();
final CountDownLatch counter = new CountDownLatch(1);
queue.execute(new Task() {
@Override
public void run() {
counter.countDown();
}
});
counter.await(1000, TimeUnit.MILLISECONDS);
if (counter.getCount() != 0) {
Assert.fail("A task was not executed via global queue after default dispatcher shutdown&restart");
}
}
}