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/* |
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* Written by Doug Lea with assistance from members of JCP JSR-166 |
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* Expert Group and released to the public domain, as explained at |
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* http://creativecommons.org/licenses/publicdomain |
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* http://creativecommons.org/publicdomain/zero/1.0/ |
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*/ |
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import junit.framework.*; |
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try { |
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assertSame(ForkJoinPool.defaultForkJoinWorkerThreadFactory, |
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p.getFactory()); |
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assertTrue(p.isQuiescent()); |
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assertFalse(p.getAsyncMode()); |
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assertEquals(0, p.getActiveThreadCount()); |
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assertEquals(0, p.getStealCount()); |
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} |
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/** |
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* After invoking a single task, isQuiescent is true, |
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* queues are empty, threads are not active, and |
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* construction parameters continue to hold |
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* After invoking a single task, isQuiescent eventually becomes |
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* true, at which time queues are empty, threads are not active, |
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* the task has completed successfully, and construction |
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* parameters continue to hold |
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*/ |
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public void testisQuiescent() throws InterruptedException { |
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public void testisQuiescent() throws Exception { |
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ForkJoinPool p = new ForkJoinPool(2); |
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try { |
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assertTrue(p.isQuiescent()); |
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p.invoke(new FibTask(20)); |
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long startTime = System.nanoTime(); |
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FibTask f = new FibTask(20); |
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p.invoke(f); |
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assertSame(ForkJoinPool.defaultForkJoinWorkerThreadFactory, |
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p.getFactory()); |
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Thread.sleep(SMALL_DELAY_MS); |
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while (! p.isQuiescent()) { |
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if (millisElapsedSince(startTime) > LONG_DELAY_MS) |
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throw new AssertionFailedError("timed out"); |
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assertFalse(p.getAsyncMode()); |
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assertFalse(p.isShutdown()); |
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assertFalse(p.isTerminating()); |
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assertFalse(p.isTerminated()); |
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Thread.yield(); |
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} |
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assertTrue(p.isQuiescent()); |
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assertFalse(p.getAsyncMode()); |
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assertEquals(0, p.getActiveThreadCount()); |
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assertFalse(p.isShutdown()); |
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assertFalse(p.isTerminating()); |
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assertFalse(p.isTerminated()); |
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assertTrue(f.isDone()); |
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assertEquals(6765, (int) f.get()); |
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} finally { |
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joinPool(p); |
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} |
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* pollSubmission returns unexecuted submitted task, if present |
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*/ |
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public void testPollSubmission() { |
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final CountDownLatch done = new CountDownLatch(1); |
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SubFJP p = new SubFJP(); |
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try { |
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ForkJoinTask a = p.submit(new ShortRunnable()); |
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ForkJoinTask b = p.submit(new ShortRunnable()); |
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ForkJoinTask c = p.submit(new ShortRunnable()); |
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ForkJoinTask a = p.submit(awaiter(done)); |
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ForkJoinTask b = p.submit(awaiter(done)); |
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ForkJoinTask c = p.submit(awaiter(done)); |
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ForkJoinTask r = p.pollSubmission(); |
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assertTrue(r == a || r == b || r == c); |
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assertFalse(r.isDone()); |
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} finally { |
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done.countDown(); |
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joinPool(p); |
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} |
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} |
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* drainTasksTo transfers unexecuted submitted tasks, if present |
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*/ |
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public void testDrainTasksTo() { |
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final CountDownLatch done = new CountDownLatch(1); |
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SubFJP p = new SubFJP(); |
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try { |
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ForkJoinTask a = p.submit(new ShortRunnable()); |
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ForkJoinTask b = p.submit(new ShortRunnable()); |
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ForkJoinTask c = p.submit(new ShortRunnable()); |
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ForkJoinTask a = p.submit(awaiter(done)); |
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ForkJoinTask b = p.submit(awaiter(done)); |
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ForkJoinTask c = p.submit(awaiter(done)); |
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ArrayList<ForkJoinTask> al = new ArrayList(); |
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p.drainTasksTo(al); |
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assertTrue(al.size() > 0); |
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assertFalse(r.isDone()); |
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} |
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} finally { |
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done.countDown(); |
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joinPool(p); |
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} |
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} |
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assertFalse(task.isDone()); |
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Future<?> future = e.submit(task); |
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assertNull(future.get()); |
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assertNull(future.get(MEDIUM_DELAY_MS, MILLISECONDS)); |
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assertTrue(task.isDone()); |
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assertTrue(future.isDone()); |
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assertFalse(future.isCancelled()); |
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} finally { |
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joinPool(e); |