| /******************************************************************************* |
| * Copyright (c) 2008, 2010 VMware Inc. |
| * 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: |
| * VMware Inc. - initial contribution |
| *******************************************************************************/ |
| |
| package org.eclipse.virgo.kernel.serviceability.dump; |
| |
| import static org.junit.Assert.assertFalse; |
| import static org.junit.Assert.assertTrue; |
| |
| import java.util.concurrent.CountDownLatch; |
| |
| import org.eclipse.virgo.kernel.serviceability.dump.FFDCExceptionState; |
| import org.junit.Test; |
| |
| |
| public class FFDCExceptionStateTests { |
| |
| @Test |
| public void seen() { |
| Throwable throwable = new Throwable(); |
| assertFalse(FFDCExceptionState.seen(throwable)); |
| FFDCExceptionState.record(throwable); |
| assertTrue(FFDCExceptionState.seen(throwable)); |
| } |
| |
| @Test |
| public void multithreadedSeen() { |
| final Throwable throwable = new Throwable(); |
| FFDCExceptionState.record(throwable); |
| assertTrue(FFDCExceptionState.seen(throwable)); |
| SeenChecker checker = new SeenChecker(throwable); |
| checker.start(); |
| assertFalse(checker.seen()); |
| } |
| |
| @Test |
| public void seenAsNestedCause() { |
| Throwable nested = new Throwable(); |
| FFDCExceptionState.record(nested); |
| Throwable root = new Throwable(nested); |
| assertTrue(FFDCExceptionState.seen(root)); |
| } |
| |
| private class SeenChecker extends Thread { |
| |
| private final Throwable throwable; |
| private volatile boolean seen; |
| private final CountDownLatch latch; |
| |
| public SeenChecker(Throwable throwable) { |
| this.throwable = throwable; |
| this.latch = new CountDownLatch(1); |
| } |
| |
| public boolean seen() { |
| boolean awaiting = true; |
| while (awaiting) { |
| try { |
| this.latch.await(); |
| awaiting = false; |
| } catch (InterruptedException ie) { |
| |
| } |
| } |
| return this.seen; |
| } |
| |
| public void run() { |
| seen = FFDCExceptionState.seen(throwable); |
| latch.countDown(); |
| } |
| } |
| } |