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/*******************************************************************************
* Copyright (c) 2010, 2012 Oracle. All rights reserved.
* This program and the accompanying materials are made available under the
* terms of the Eclipse Public License v1.0, which accompanies this distribution
* and is available at http://www.eclipse.org/legal/epl-v10.html.
*
* Contributors:
* Oracle - initial API and implementation
******************************************************************************/
package org.eclipse.jpt.common.utility.tests.internal;
import java.util.ArrayList;
import java.util.Vector;
import java.util.concurrent.ThreadFactory;
import org.eclipse.jpt.common.utility.internal.CompositeException;
import junit.framework.TestCase;
/**
* This test case helps simplify the testing of multi-threaded code.
*/
@SuppressWarnings("nls")
public abstract class MultiThreadedTestCase
extends TestCase
{
private final ArrayList<Thread> threads = new ArrayList<Thread>();
/* private */ final Vector<Throwable> exceptions = new Vector<Throwable>();
/**
* The default "tick" is one second.
* Specify the appropriate system property to override.
*/
public static final String TICK_SYSTEM_PROPERTY_NAME = "org.eclipse.jpt.common.utility.tests.tick";
public static final long TICK = Long.getLong(TICK_SYSTEM_PROPERTY_NAME, 1000).longValue();
public static final long TWO_TICKS = 2 * TICK;
public static final long THREE_TICKS = 3 * TICK;
/**
* Default constructor.
*/
public MultiThreadedTestCase() {
super();
}
/**
* Named constructor.
*/
public MultiThreadedTestCase(String name) {
super(name);
}
@Override
protected void setUp() throws Exception {
super.setUp();
}
/**
* Stop all the threads constructed during the test case.
* If any exceptions were thrown by the threads, re-throw them here.
*/
@Override
protected void tearDown() throws Exception {
for (Thread thread : this.threads) {
if (thread.isAlive()) {
throw new IllegalStateException("thread is still alive: " + thread);
}
}
if ( ! this.exceptions.isEmpty()) {
throw new CompositeException(this.exceptions);
}
TestTools.clear(this);
super.tearDown();
}
protected Thread buildThread(Runnable runnable) {
return this.buildThread(runnable, null);
}
protected Thread buildThread(Runnable runnable, String name) {
Thread thread = new Thread(new RunnableWrapper(runnable));
if (name != null) {
thread.setName(name);
}
this.threads.add(thread);
return thread;
}
protected ThreadFactory buildThreadFactory() {
return new TestThreadFactory();
}
/**
* Convenience method that handles {@link InterruptedException}.
*/
public void sleep(long millis) {
TestTools.sleep(millis);
}
/**
* Wrap a runnable and log any exception it throws.
*/
public class TestThreadFactory implements ThreadFactory {
public Thread newThread(Runnable r) {
return MultiThreadedTestCase.this.buildThread(r);
}
}
/**
* Simplify runnables that execute call that throws checked exceptions.
*/
public abstract class TestRunnable implements Runnable {
public final void run() {
try {
this.run_();
} catch (Throwable ex) {
throw new RuntimeException(ex);
}
}
protected abstract void run_() throws Throwable;
}
/**
* Wrap a runnable and log any exception it throws.
*/
private class RunnableWrapper implements Runnable {
private final Runnable runnable;
RunnableWrapper(Runnable runnable) {
super();
this.runnable = runnable;
}
public void run() {
try {
this.runnable.run();
} catch (RuntimeException ex) {
MultiThreadedTestCase.this.exceptions.add(ex);
}
}
}
}
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