/*
* Copyright 2007 the original author or authors.
*
* 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.springmodules.xt.model.event.collector;
import java.util.concurrent.Callable;
import java.util.concurrent.Exchanger;
import java.util.concurrent.FutureTask;
import junit.framework.TestCase;
import org.springframework.context.ApplicationEvent;
import org.springmodules.xt.model.event.support.PayloadEvent;
/**
* @author Sergio Bossa
*/
public class BlockingCollectorTest extends TestCase {
private BlockingCollector collector;
private Exchanger<ApplicationEvent> exchanger;
public BlockingCollectorTest(String testName) {
super(testName);
}
protected void setUp() throws Exception {
this.collector = new BlockingCollector();
this.exchanger = new Exchanger<ApplicationEvent>();
}
public void testCollectFIFOOrder() throws Exception {
PayloadEvent e1 = new PayloadEvent(this, new String("test"), null);
PayloadEvent e2 = new PayloadEvent(this);
PayloadEvent e3 = new PayloadEvent(this);
this.collector.onApplicationEvent(e1);
this.collector.onApplicationEvent(e2);
this.collector.onApplicationEvent(e3);
assertSame(e1, this.collector.pollEvent());
assertSame(e2, this.collector.pollEvent());
assertSame(e3, this.collector.pollEvent());
}
public void testCollectAndPollFromDifferentThreads() throws Exception {
FutureTask f1 = new FutureTask(new Producer());
FutureTask f2 = new FutureTask(new Consumer());
Thread t1 = new Thread(f1);
Thread t2 = new Thread(f2);
t1.start();
t2.start();
try {
f1.get();
f2.get();
} catch (Exception ex) {
ex.printStackTrace();
this.fail("Test failure: " + ex.getMessage());
}
}
private class Producer implements Callable {
public Object call() throws Exception {
for (int i = 0; i < 5; i++) {
ApplicationEvent produced = new PayloadEvent(this, new String("test-" + i), null);
BlockingCollectorTest.this.collector.onApplicationEvent(produced);
ApplicationEvent polled = BlockingCollectorTest.this.exchanger.exchange(produced);
BlockingCollectorTest.this.assertSame(produced, polled);
}
return null;
}
}
private class Consumer implements Callable {
public Object call() throws Exception {
for (int i = 0; i < 5; i++) {
ApplicationEvent polled = BlockingCollectorTest.this.collector.pollEvent();
ApplicationEvent produced = BlockingCollectorTest.this.exchanger.exchange(polled);
BlockingCollectorTest.this.assertSame(polled, produced);
}
return null;
}
}
}