6 |
|
* Pat Fisher, Mike Judd. |
7 |
|
*/ |
8 |
|
|
9 |
< |
import junit.framework.*; |
10 |
< |
import java.util.Arrays; |
9 |
> |
import static java.util.concurrent.TimeUnit.MILLISECONDS; |
10 |
> |
|
11 |
|
import java.util.ArrayList; |
12 |
+ |
import java.util.Arrays; |
13 |
|
import java.util.Collection; |
14 |
|
import java.util.Iterator; |
15 |
|
import java.util.NoSuchElementException; |
15 |
– |
import java.util.Queue; |
16 |
|
import java.util.concurrent.BlockingQueue; |
17 |
|
import java.util.concurrent.CountDownLatch; |
18 |
|
import java.util.concurrent.Executors; |
19 |
|
import java.util.concurrent.ExecutorService; |
20 |
|
import java.util.concurrent.SynchronousQueue; |
21 |
< |
import static java.util.concurrent.TimeUnit.MILLISECONDS; |
21 |
> |
import java.util.concurrent.ThreadLocalRandom; |
22 |
> |
|
23 |
> |
import junit.framework.Test; |
24 |
|
|
25 |
|
public class SynchronousQueueTest extends JSR166TestCase { |
26 |
|
|
37 |
|
} |
38 |
|
|
39 |
|
public static void main(String[] args) { |
40 |
< |
junit.textui.TestRunner.run(suite()); |
40 |
> |
main(suite(), args); |
41 |
|
} |
42 |
|
|
43 |
|
public static Test suite() { |
139 |
|
}}); |
140 |
|
|
141 |
|
await(pleaseInterrupt); |
142 |
< |
assertThreadStaysAlive(t); |
142 |
> |
assertThreadBlocks(t, Thread.State.WAITING); |
143 |
|
t.interrupt(); |
144 |
|
awaitTermination(t); |
145 |
|
assertEquals(0, q.remainingCapacity()); |
159 |
|
pleaseTake.countDown(); |
160 |
|
q.put(one); |
161 |
|
|
162 |
+ |
Thread.currentThread().interrupt(); |
163 |
+ |
try { |
164 |
+ |
q.put(99); |
165 |
+ |
shouldThrow(); |
166 |
+ |
} catch (InterruptedException success) {} |
167 |
+ |
assertFalse(Thread.interrupted()); |
168 |
+ |
|
169 |
|
pleaseInterrupt.countDown(); |
170 |
|
try { |
171 |
|
q.put(99); |
175 |
|
}}); |
176 |
|
|
177 |
|
await(pleaseTake); |
178 |
< |
assertEquals(q.remainingCapacity(), 0); |
178 |
> |
assertEquals(0, q.remainingCapacity()); |
179 |
|
try { assertSame(one, q.take()); } |
180 |
|
catch (InterruptedException e) { threadUnexpectedException(e); } |
181 |
|
|
182 |
|
await(pleaseInterrupt); |
183 |
< |
assertThreadStaysAlive(t); |
183 |
> |
assertThreadBlocks(t, Thread.State.WAITING); |
184 |
|
t.interrupt(); |
185 |
|
awaitTermination(t); |
186 |
< |
assertEquals(q.remainingCapacity(), 0); |
186 |
> |
assertEquals(0, q.remainingCapacity()); |
187 |
|
} |
188 |
|
|
189 |
|
/** |
190 |
|
* timed offer times out if elements not taken |
191 |
|
*/ |
192 |
< |
public void testTimedOffer() { testTimedOffer(false); } |
193 |
< |
public void testTimedOffer_fair() { testTimedOffer(true); } |
185 |
< |
public void testTimedOffer(boolean fair) { |
192 |
> |
public void testTimedOffer() { |
193 |
> |
final boolean fair = ThreadLocalRandom.current().nextBoolean(); |
194 |
|
final SynchronousQueue q = new SynchronousQueue(fair); |
195 |
|
final CountDownLatch pleaseInterrupt = new CountDownLatch(1); |
196 |
|
Thread t = newStartedThread(new CheckedRunnable() { |
198 |
|
long startTime = System.nanoTime(); |
199 |
|
assertFalse(q.offer(new Object(), timeoutMillis(), MILLISECONDS)); |
200 |
|
assertTrue(millisElapsedSince(startTime) >= timeoutMillis()); |
201 |
+ |
|
202 |
+ |
Thread.currentThread().interrupt(); |
203 |
+ |
try { |
204 |
+ |
q.offer(new Object(), 2 * LONG_DELAY_MS, MILLISECONDS); |
205 |
+ |
shouldThrow(); |
206 |
+ |
} catch (InterruptedException success) {} |
207 |
+ |
assertFalse(Thread.interrupted()); |
208 |
+ |
|
209 |
|
pleaseInterrupt.countDown(); |
210 |
|
try { |
211 |
|
q.offer(new Object(), 2 * LONG_DELAY_MS, MILLISECONDS); |
212 |
|
shouldThrow(); |
213 |
|
} catch (InterruptedException success) {} |
214 |
+ |
assertFalse(Thread.interrupted()); |
215 |
|
}}); |
216 |
|
|
217 |
|
await(pleaseInterrupt); |
218 |
< |
assertThreadStaysAlive(t); |
218 |
> |
assertThreadBlocks(t, Thread.State.TIMED_WAITING); |
219 |
|
t.interrupt(); |
220 |
|
awaitTermination(t); |
221 |
|
} |
244 |
|
/** |
245 |
|
* timed poll with nonzero timeout times out if no active putter |
246 |
|
*/ |
247 |
< |
public void testTimedPoll() { testTimedPoll(false); } |
248 |
< |
public void testTimedPoll_fair() { testTimedPoll(true); } |
232 |
< |
public void testTimedPoll(boolean fair) { |
247 |
> |
public void testTimedPoll() { |
248 |
> |
final boolean fair = ThreadLocalRandom.current().nextBoolean(); |
249 |
|
final SynchronousQueue q = new SynchronousQueue(fair); |
250 |
< |
long startTime = System.nanoTime(); |
250 |
> |
final long startTime = System.nanoTime(); |
251 |
|
try { assertNull(q.poll(timeoutMillis(), MILLISECONDS)); } |
252 |
|
catch (InterruptedException e) { threadUnexpectedException(e); } |
253 |
|
assertTrue(millisElapsedSince(startTime) >= timeoutMillis()); |
257 |
|
* timed poll before a delayed offer times out, returning null; |
258 |
|
* after offer succeeds; on interruption throws |
259 |
|
*/ |
260 |
< |
public void testTimedPollWithOffer() { testTimedPollWithOffer(false); } |
261 |
< |
public void testTimedPollWithOffer_fair() { testTimedPollWithOffer(true); } |
246 |
< |
public void testTimedPollWithOffer(boolean fair) { |
260 |
> |
public void testTimedPollWithOffer() { |
261 |
> |
final boolean fair = ThreadLocalRandom.current().nextBoolean(); |
262 |
|
final SynchronousQueue q = new SynchronousQueue(fair); |
263 |
|
final CountDownLatch pleaseOffer = new CountDownLatch(1); |
264 |
|
final CountDownLatch pleaseInterrupt = new CountDownLatch(1); |
271 |
|
pleaseOffer.countDown(); |
272 |
|
startTime = System.nanoTime(); |
273 |
|
assertSame(zero, q.poll(LONG_DELAY_MS, MILLISECONDS)); |
259 |
– |
assertTrue(millisElapsedSince(startTime) < MEDIUM_DELAY_MS); |
274 |
|
|
275 |
|
Thread.currentThread().interrupt(); |
276 |
|
try { |
285 |
|
shouldThrow(); |
286 |
|
} catch (InterruptedException success) {} |
287 |
|
assertFalse(Thread.interrupted()); |
288 |
+ |
|
289 |
+ |
assertTrue(millisElapsedSince(startTime) < LONG_DELAY_MS); |
290 |
|
}}); |
291 |
|
|
292 |
|
await(pleaseOffer); |
293 |
|
long startTime = System.nanoTime(); |
294 |
|
try { assertTrue(q.offer(zero, LONG_DELAY_MS, MILLISECONDS)); } |
295 |
|
catch (InterruptedException e) { threadUnexpectedException(e); } |
296 |
< |
assertTrue(millisElapsedSince(startTime) < MEDIUM_DELAY_MS); |
296 |
> |
assertTrue(millisElapsedSince(startTime) < LONG_DELAY_MS); |
297 |
|
|
298 |
|
await(pleaseInterrupt); |
299 |
< |
assertThreadStaysAlive(t); |
299 |
> |
assertThreadBlocks(t, Thread.State.TIMED_WAITING); |
300 |
|
t.interrupt(); |
301 |
|
awaitTermination(t); |
302 |
|
} |
405 |
|
public void testToArray(boolean fair) { |
406 |
|
final SynchronousQueue q = new SynchronousQueue(fair); |
407 |
|
Object[] o = q.toArray(); |
408 |
< |
assertEquals(o.length, 0); |
408 |
> |
assertEquals(0, o.length); |
409 |
|
} |
410 |
|
|
411 |
|
/** |
412 |
< |
* toArray(a) is nulled at position 0 |
412 |
> |
* toArray(Integer array) returns its argument with the first |
413 |
> |
* element (if present) nulled out |
414 |
|
*/ |
415 |
|
public void testToArray2() { testToArray2(false); } |
416 |
|
public void testToArray2_fair() { testToArray2(true); } |
417 |
|
public void testToArray2(boolean fair) { |
418 |
< |
final SynchronousQueue q = new SynchronousQueue(fair); |
419 |
< |
Integer[] ints = new Integer[1]; |
420 |
< |
assertNull(ints[0]); |
418 |
> |
final SynchronousQueue<Integer> q = new SynchronousQueue<>(fair); |
419 |
> |
Integer[] a; |
420 |
> |
|
421 |
> |
a = new Integer[0]; |
422 |
> |
assertSame(a, q.toArray(a)); |
423 |
> |
|
424 |
> |
a = new Integer[3]; |
425 |
> |
Arrays.fill(a, 42); |
426 |
> |
assertSame(a, q.toArray(a)); |
427 |
> |
assertNull(a[0]); |
428 |
> |
for (int i = 1; i < a.length; i++) |
429 |
> |
assertEquals(42, (int) a[i]); |
430 |
|
} |
431 |
|
|
432 |
|
/** |
437 |
|
public void testToArray_null(boolean fair) { |
438 |
|
final SynchronousQueue q = new SynchronousQueue(fair); |
439 |
|
try { |
440 |
< |
Object o[] = q.toArray(null); |
440 |
> |
Object[] o = q.toArray(null); |
441 |
|
shouldThrow(); |
442 |
|
} catch (NullPointerException success) {} |
443 |
|
} |
448 |
|
public void testIterator() { testIterator(false); } |
449 |
|
public void testIterator_fair() { testIterator(true); } |
450 |
|
public void testIterator(boolean fair) { |
451 |
< |
final SynchronousQueue q = new SynchronousQueue(fair); |
426 |
< |
Iterator it = q.iterator(); |
427 |
< |
assertFalse(it.hasNext()); |
428 |
< |
try { |
429 |
< |
Object x = it.next(); |
430 |
< |
shouldThrow(); |
431 |
< |
} catch (NoSuchElementException success) {} |
451 |
> |
assertIteratorExhausted(new SynchronousQueue(fair).iterator()); |
452 |
|
} |
453 |
|
|
454 |
|
/** |
483 |
|
public void testOfferInExecutor_fair() { testOfferInExecutor(true); } |
484 |
|
public void testOfferInExecutor(boolean fair) { |
485 |
|
final SynchronousQueue q = new SynchronousQueue(fair); |
466 |
– |
ExecutorService executor = Executors.newFixedThreadPool(2); |
486 |
|
final CheckedBarrier threadsStarted = new CheckedBarrier(2); |
487 |
+ |
final ExecutorService executor = Executors.newFixedThreadPool(2); |
488 |
+ |
try (PoolCleaner cleaner = cleaner(executor)) { |
489 |
|
|
490 |
< |
executor.execute(new CheckedRunnable() { |
491 |
< |
public void realRun() throws InterruptedException { |
492 |
< |
assertFalse(q.offer(one)); |
493 |
< |
threadsStarted.await(); |
494 |
< |
assertTrue(q.offer(one, LONG_DELAY_MS, MILLISECONDS)); |
495 |
< |
assertEquals(0, q.remainingCapacity()); |
496 |
< |
}}); |
497 |
< |
|
498 |
< |
executor.execute(new CheckedRunnable() { |
499 |
< |
public void realRun() throws InterruptedException { |
500 |
< |
threadsStarted.await(); |
501 |
< |
assertSame(one, q.take()); |
502 |
< |
}}); |
503 |
< |
|
483 |
< |
joinPool(executor); |
490 |
> |
executor.execute(new CheckedRunnable() { |
491 |
> |
public void realRun() throws InterruptedException { |
492 |
> |
assertFalse(q.offer(one)); |
493 |
> |
threadsStarted.await(); |
494 |
> |
assertTrue(q.offer(one, LONG_DELAY_MS, MILLISECONDS)); |
495 |
> |
assertEquals(0, q.remainingCapacity()); |
496 |
> |
}}); |
497 |
> |
|
498 |
> |
executor.execute(new CheckedRunnable() { |
499 |
> |
public void realRun() throws InterruptedException { |
500 |
> |
threadsStarted.await(); |
501 |
> |
assertSame(one, q.take()); |
502 |
> |
}}); |
503 |
> |
} |
504 |
|
} |
505 |
|
|
506 |
|
/** |
511 |
|
public void testPollInExecutor(boolean fair) { |
512 |
|
final SynchronousQueue q = new SynchronousQueue(fair); |
513 |
|
final CheckedBarrier threadsStarted = new CheckedBarrier(2); |
514 |
< |
ExecutorService executor = Executors.newFixedThreadPool(2); |
515 |
< |
executor.execute(new CheckedRunnable() { |
516 |
< |
public void realRun() throws InterruptedException { |
517 |
< |
assertNull(q.poll()); |
518 |
< |
threadsStarted.await(); |
519 |
< |
assertSame(one, q.poll(LONG_DELAY_MS, MILLISECONDS)); |
520 |
< |
assertTrue(q.isEmpty()); |
521 |
< |
}}); |
522 |
< |
|
523 |
< |
executor.execute(new CheckedRunnable() { |
524 |
< |
public void realRun() throws InterruptedException { |
525 |
< |
threadsStarted.await(); |
526 |
< |
q.put(one); |
527 |
< |
}}); |
528 |
< |
|
529 |
< |
joinPool(executor); |
514 |
> |
final ExecutorService executor = Executors.newFixedThreadPool(2); |
515 |
> |
try (PoolCleaner cleaner = cleaner(executor)) { |
516 |
> |
executor.execute(new CheckedRunnable() { |
517 |
> |
public void realRun() throws InterruptedException { |
518 |
> |
assertNull(q.poll()); |
519 |
> |
threadsStarted.await(); |
520 |
> |
assertSame(one, q.poll(LONG_DELAY_MS, MILLISECONDS)); |
521 |
> |
assertTrue(q.isEmpty()); |
522 |
> |
}}); |
523 |
> |
|
524 |
> |
executor.execute(new CheckedRunnable() { |
525 |
> |
public void realRun() throws InterruptedException { |
526 |
> |
threadsStarted.await(); |
527 |
> |
q.put(one); |
528 |
> |
}}); |
529 |
> |
} |
530 |
|
} |
531 |
|
|
532 |
|
/** |
533 |
|
* a deserialized serialized queue is usable |
534 |
|
*/ |
535 |
< |
public void testSerialization() { testSerialization(false); } |
536 |
< |
public void testSerialization_fair() { testSerialization(true); } |
537 |
< |
public void testSerialization(boolean fair) { |
538 |
< |
final SynchronousQueue x = new SynchronousQueue(fair); |
539 |
< |
final SynchronousQueue y = serialClone(x); |
540 |
< |
assertTrue(x != y); |
541 |
< |
assertTrue(x.isEmpty()); |
542 |
< |
assertTrue(y.isEmpty()); |
535 |
> |
public void testSerialization() { |
536 |
> |
final SynchronousQueue x = new SynchronousQueue(); |
537 |
> |
final SynchronousQueue y = new SynchronousQueue(false); |
538 |
> |
final SynchronousQueue z = new SynchronousQueue(true); |
539 |
> |
assertSerialEquals(x, y); |
540 |
> |
assertNotSerialEquals(x, z); |
541 |
> |
SynchronousQueue[] qs = { x, y, z }; |
542 |
> |
for (SynchronousQueue q : qs) { |
543 |
> |
SynchronousQueue clone = serialClone(q); |
544 |
> |
assertNotSame(q, clone); |
545 |
> |
assertSerialEquals(q, clone); |
546 |
> |
assertTrue(clone.isEmpty()); |
547 |
> |
assertEquals(0, clone.size()); |
548 |
> |
assertEquals(0, clone.remainingCapacity()); |
549 |
> |
assertFalse(clone.offer(zero)); |
550 |
> |
} |
551 |
|
} |
552 |
|
|
553 |
|
/** |
559 |
|
final SynchronousQueue q = new SynchronousQueue(fair); |
560 |
|
ArrayList l = new ArrayList(); |
561 |
|
q.drainTo(l); |
562 |
< |
assertEquals(q.size(), 0); |
563 |
< |
assertEquals(l.size(), 0); |
562 |
> |
assertEquals(0, q.size()); |
563 |
> |
assertEquals(0, l.size()); |
564 |
|
} |
565 |
|
|
566 |
|
/** |
583 |
|
fail("timed out"); |
584 |
|
Thread.yield(); |
585 |
|
} |
586 |
< |
assertTrue(l.size() == 1); |
586 |
> |
assertEquals(1, l.size()); |
587 |
|
assertSame(one, l.get(0)); |
588 |
|
awaitTermination(t); |
589 |
|
} |
604 |
|
}}); |
605 |
|
|
606 |
|
ArrayList l = new ArrayList(); |
607 |
< |
delay(SHORT_DELAY_MS); |
608 |
< |
q.drainTo(l, 1); |
607 |
> |
int drained; |
608 |
> |
while ((drained = q.drainTo(l, 1)) == 0) Thread.yield(); |
609 |
> |
assertEquals(1, drained); |
610 |
|
assertEquals(1, l.size()); |
611 |
< |
q.drainTo(l, 1); |
611 |
> |
while ((drained = q.drainTo(l, 1)) == 0) Thread.yield(); |
612 |
> |
assertEquals(1, drained); |
613 |
|
assertEquals(2, l.size()); |
614 |
|
assertTrue(l.contains(one)); |
615 |
|
assertTrue(l.contains(two)); |
617 |
|
awaitTermination(t2); |
618 |
|
} |
619 |
|
|
620 |
+ |
/** |
621 |
+ |
* remove(null), contains(null) always return false |
622 |
+ |
*/ |
623 |
+ |
public void testNeverContainsNull() { |
624 |
+ |
Collection<?> q = new SynchronousQueue(); |
625 |
+ |
assertFalse(q.contains(null)); |
626 |
+ |
assertFalse(q.remove(null)); |
627 |
+ |
} |
628 |
+ |
|
629 |
|
} |