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* Pat Fisher, Mike Judd. |
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*/ |
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import junit.framework.*; |
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import java.util.Arrays; |
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import static java.util.concurrent.TimeUnit.MILLISECONDS; |
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|
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import java.util.ArrayList; |
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import java.util.Arrays; |
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import java.util.Collection; |
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import java.util.Iterator; |
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import java.util.NoSuchElementException; |
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import java.util.Queue; |
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import java.util.concurrent.BlockingQueue; |
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import java.util.concurrent.CountDownLatch; |
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import java.util.concurrent.Executors; |
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import java.util.concurrent.ExecutorService; |
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import java.util.concurrent.SynchronousQueue; |
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import static java.util.concurrent.TimeUnit.MILLISECONDS; |
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import java.util.concurrent.ThreadLocalRandom; |
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|
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import junit.framework.Test; |
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public class SynchronousQueueTest extends JSR166TestCase { |
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} |
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public static void main(String[] args) { |
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junit.textui.TestRunner.run(suite()); |
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main(suite(), args); |
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} |
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public static Test suite() { |
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}}); |
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await(pleaseInterrupt); |
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assertThreadStaysAlive(t); |
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assertThreadBlocks(t, Thread.State.WAITING); |
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t.interrupt(); |
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awaitTermination(t); |
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assertEquals(0, q.remainingCapacity()); |
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pleaseTake.countDown(); |
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q.put(one); |
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|
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Thread.currentThread().interrupt(); |
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try { |
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q.put(99); |
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shouldThrow(); |
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} catch (InterruptedException success) {} |
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assertFalse(Thread.interrupted()); |
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|
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pleaseInterrupt.countDown(); |
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try { |
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q.put(99); |
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catch (InterruptedException e) { threadUnexpectedException(e); } |
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|
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await(pleaseInterrupt); |
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assertThreadStaysAlive(t); |
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assertThreadBlocks(t, Thread.State.WAITING); |
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t.interrupt(); |
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awaitTermination(t); |
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assertEquals(0, q.remainingCapacity()); |
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/** |
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* timed offer times out if elements not taken |
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*/ |
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public void testTimedOffer() { testTimedOffer(false); } |
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public void testTimedOffer_fair() { testTimedOffer(true); } |
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public void testTimedOffer(boolean fair) { |
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public void testTimedOffer() { |
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final boolean fair = ThreadLocalRandom.current().nextBoolean(); |
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final SynchronousQueue q = new SynchronousQueue(fair); |
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final CountDownLatch pleaseInterrupt = new CountDownLatch(1); |
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Thread t = newStartedThread(new CheckedRunnable() { |
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q.offer(new Object(), 2 * LONG_DELAY_MS, MILLISECONDS); |
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shouldThrow(); |
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} catch (InterruptedException success) {} |
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assertFalse(Thread.interrupted()); |
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}}); |
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await(pleaseInterrupt); |
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assertThreadStaysAlive(t); |
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assertThreadBlocks(t, Thread.State.TIMED_WAITING); |
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t.interrupt(); |
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awaitTermination(t); |
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} |
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/** |
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* timed poll with nonzero timeout times out if no active putter |
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*/ |
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public void testTimedPoll() { testTimedPoll(false); } |
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public void testTimedPoll_fair() { testTimedPoll(true); } |
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public void testTimedPoll(boolean fair) { |
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public void testTimedPoll() { |
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final boolean fair = ThreadLocalRandom.current().nextBoolean(); |
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final SynchronousQueue q = new SynchronousQueue(fair); |
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long startTime = System.nanoTime(); |
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final long startTime = System.nanoTime(); |
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try { assertNull(q.poll(timeoutMillis(), MILLISECONDS)); } |
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catch (InterruptedException e) { threadUnexpectedException(e); } |
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assertTrue(millisElapsedSince(startTime) >= timeoutMillis()); |
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* timed poll before a delayed offer times out, returning null; |
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* after offer succeeds; on interruption throws |
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*/ |
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public void testTimedPollWithOffer() { testTimedPollWithOffer(false); } |
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public void testTimedPollWithOffer_fair() { testTimedPollWithOffer(true); } |
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public void testTimedPollWithOffer(boolean fair) { |
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public void testTimedPollWithOffer() { |
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final boolean fair = ThreadLocalRandom.current().nextBoolean(); |
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final SynchronousQueue q = new SynchronousQueue(fair); |
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final CountDownLatch pleaseOffer = new CountDownLatch(1); |
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final CountDownLatch pleaseInterrupt = new CountDownLatch(1); |
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pleaseOffer.countDown(); |
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startTime = System.nanoTime(); |
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assertSame(zero, q.poll(LONG_DELAY_MS, MILLISECONDS)); |
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assertTrue(millisElapsedSince(startTime) < MEDIUM_DELAY_MS); |
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Thread.currentThread().interrupt(); |
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try { |
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shouldThrow(); |
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} catch (InterruptedException success) {} |
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assertFalse(Thread.interrupted()); |
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|
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assertTrue(millisElapsedSince(startTime) < LONG_DELAY_MS); |
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}}); |
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await(pleaseOffer); |
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long startTime = System.nanoTime(); |
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try { assertTrue(q.offer(zero, LONG_DELAY_MS, MILLISECONDS)); } |
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catch (InterruptedException e) { threadUnexpectedException(e); } |
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assertTrue(millisElapsedSince(startTime) < MEDIUM_DELAY_MS); |
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assertTrue(millisElapsedSince(startTime) < LONG_DELAY_MS); |
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|
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await(pleaseInterrupt); |
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assertThreadStaysAlive(t); |
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assertThreadBlocks(t, Thread.State.TIMED_WAITING); |
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t.interrupt(); |
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awaitTermination(t); |
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} |
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public void testToArray2() { testToArray2(false); } |
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public void testToArray2_fair() { testToArray2(true); } |
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public void testToArray2(boolean fair) { |
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final SynchronousQueue<Integer> q |
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= new SynchronousQueue<Integer>(fair); |
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final SynchronousQueue<Integer> q = new SynchronousQueue<>(fair); |
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Integer[] a; |
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a = new Integer[0]; |
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assertSame(a, q.toArray(a)); |
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|
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a = new Integer[3]; |
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Arrays.fill(a, 42); |
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assertSame(a, q.toArray(a)); |
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public void testToArray_null(boolean fair) { |
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final SynchronousQueue q = new SynchronousQueue(fair); |
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try { |
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Object o[] = q.toArray(null); |
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Object[] o = q.toArray(null); |
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shouldThrow(); |
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} catch (NullPointerException success) {} |
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} |
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public void testIterator() { testIterator(false); } |
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public void testIterator_fair() { testIterator(true); } |
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public void testIterator(boolean fair) { |
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final SynchronousQueue q = new SynchronousQueue(fair); |
437 |
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Iterator it = q.iterator(); |
438 |
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assertFalse(it.hasNext()); |
439 |
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try { |
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Object x = it.next(); |
441 |
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shouldThrow(); |
442 |
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} catch (NoSuchElementException success) {} |
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> |
assertIteratorExhausted(new SynchronousQueue(fair).iterator()); |
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} |
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|
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/** |
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public void testOfferInExecutor_fair() { testOfferInExecutor(true); } |
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public void testOfferInExecutor(boolean fair) { |
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final SynchronousQueue q = new SynchronousQueue(fair); |
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ExecutorService executor = Executors.newFixedThreadPool(2); |
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final CheckedBarrier threadsStarted = new CheckedBarrier(2); |
479 |
+ |
final ExecutorService executor = Executors.newFixedThreadPool(2); |
480 |
+ |
try (PoolCleaner cleaner = cleaner(executor)) { |
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|
482 |
< |
executor.execute(new CheckedRunnable() { |
483 |
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public void realRun() throws InterruptedException { |
484 |
< |
assertFalse(q.offer(one)); |
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threadsStarted.await(); |
486 |
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assertTrue(q.offer(one, LONG_DELAY_MS, MILLISECONDS)); |
487 |
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assertEquals(0, q.remainingCapacity()); |
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}}); |
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|
490 |
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executor.execute(new CheckedRunnable() { |
491 |
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public void realRun() throws InterruptedException { |
492 |
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threadsStarted.await(); |
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assertSame(one, q.take()); |
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}}); |
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|
494 |
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joinPool(executor); |
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> |
executor.execute(new CheckedRunnable() { |
483 |
> |
public void realRun() throws InterruptedException { |
484 |
> |
assertFalse(q.offer(one)); |
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> |
threadsStarted.await(); |
486 |
> |
assertTrue(q.offer(one, LONG_DELAY_MS, MILLISECONDS)); |
487 |
> |
assertEquals(0, q.remainingCapacity()); |
488 |
> |
}}); |
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> |
|
490 |
> |
executor.execute(new CheckedRunnable() { |
491 |
> |
public void realRun() throws InterruptedException { |
492 |
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threadsStarted.await(); |
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assertSame(one, q.take()); |
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> |
}}); |
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> |
} |
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} |
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|
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/** |
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public void testPollInExecutor(boolean fair) { |
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final SynchronousQueue q = new SynchronousQueue(fair); |
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final CheckedBarrier threadsStarted = new CheckedBarrier(2); |
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ExecutorService executor = Executors.newFixedThreadPool(2); |
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< |
executor.execute(new CheckedRunnable() { |
508 |
< |
public void realRun() throws InterruptedException { |
509 |
< |
assertNull(q.poll()); |
510 |
< |
threadsStarted.await(); |
511 |
< |
assertSame(one, q.poll(LONG_DELAY_MS, MILLISECONDS)); |
512 |
< |
assertTrue(q.isEmpty()); |
513 |
< |
}}); |
514 |
< |
|
515 |
< |
executor.execute(new CheckedRunnable() { |
516 |
< |
public void realRun() throws InterruptedException { |
517 |
< |
threadsStarted.await(); |
518 |
< |
q.put(one); |
519 |
< |
}}); |
520 |
< |
|
521 |
< |
joinPool(executor); |
506 |
> |
final ExecutorService executor = Executors.newFixedThreadPool(2); |
507 |
> |
try (PoolCleaner cleaner = cleaner(executor)) { |
508 |
> |
executor.execute(new CheckedRunnable() { |
509 |
> |
public void realRun() throws InterruptedException { |
510 |
> |
assertNull(q.poll()); |
511 |
> |
threadsStarted.await(); |
512 |
> |
assertSame(one, q.poll(LONG_DELAY_MS, MILLISECONDS)); |
513 |
> |
assertTrue(q.isEmpty()); |
514 |
> |
}}); |
515 |
> |
|
516 |
> |
executor.execute(new CheckedRunnable() { |
517 |
> |
public void realRun() throws InterruptedException { |
518 |
> |
threadsStarted.await(); |
519 |
> |
q.put(one); |
520 |
> |
}}); |
521 |
> |
} |
522 |
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} |
523 |
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|
524 |
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/** |
533 |
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SynchronousQueue[] qs = { x, y, z }; |
534 |
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for (SynchronousQueue q : qs) { |
535 |
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SynchronousQueue clone = serialClone(q); |
536 |
< |
assert(q != clone); |
536 |
> |
assertNotSame(q, clone); |
537 |
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assertSerialEquals(q, clone); |
538 |
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assertTrue(clone.isEmpty()); |
539 |
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assertEquals(0, clone.size()); |
575 |
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fail("timed out"); |
576 |
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Thread.yield(); |
577 |
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} |
578 |
< |
assertTrue(l.size() == 1); |
578 |
> |
assertEquals(1, l.size()); |
579 |
|
assertSame(one, l.get(0)); |
580 |
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awaitTermination(t); |
581 |
|
} |
596 |
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}}); |
597 |
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|
598 |
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ArrayList l = new ArrayList(); |
599 |
< |
delay(SHORT_DELAY_MS); |
600 |
< |
q.drainTo(l, 1); |
599 |
> |
int drained; |
600 |
> |
while ((drained = q.drainTo(l, 1)) == 0) Thread.yield(); |
601 |
> |
assertEquals(1, drained); |
602 |
|
assertEquals(1, l.size()); |
603 |
< |
q.drainTo(l, 1); |
603 |
> |
while ((drained = q.drainTo(l, 1)) == 0) Thread.yield(); |
604 |
> |
assertEquals(1, drained); |
605 |
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assertEquals(2, l.size()); |
606 |
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assertTrue(l.contains(one)); |
607 |
|
assertTrue(l.contains(two)); |
609 |
|
awaitTermination(t2); |
610 |
|
} |
611 |
|
|
612 |
+ |
/** |
613 |
+ |
* remove(null), contains(null) always return false |
614 |
+ |
*/ |
615 |
+ |
public void testNeverContainsNull() { |
616 |
+ |
Collection<?> q = new SynchronousQueue(); |
617 |
+ |
assertFalse(q.contains(null)); |
618 |
+ |
assertFalse(q.remove(null)); |
619 |
+ |
} |
620 |
+ |
|
621 |
|
} |