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Comparing jsr166/src/test/tck/LinkedTransferQueueTest.java (file contents):
Revision 1.7 by jsr166, Mon Aug 3 19:07:51 2009 UTC vs.
Revision 1.51 by jsr166, Sat Nov 26 05:42:14 2011 UTC

#	Line 1 | Line 1
1		/*
2		* Written by Doug Lea with assistance from members of JCP JSR-166
3		* Expert Group and released to the public domain, as explained at
4	<	* http://creativecommons.org/licenses/publicdomain
4	>	* http://creativecommons.org/publicdomain/zero/1.0/
5		* Other contributors include John Vint
6		*/
7
8	<	import java.io.BufferedInputStream;
9	<	import java.io.BufferedOutputStream;
10	<	import java.io.ByteArrayInputStream;
11	<	import java.io.ByteArrayOutputStream;
12	<	import java.io.ObjectInputStream;
13	<	import java.io.ObjectOutputStream;
14	<	import java.util.ArrayList;
8	>	import junit.framework.*;
9		import java.util.Arrays;
10	<	import java.util.ConcurrentModificationException;
10	>	import java.util.ArrayList;
11	>	import java.util.Collection;
12		import java.util.Iterator;
13	+	import java.util.List;
14		import java.util.NoSuchElementException;
15	<	import java.util.concurrent.*;
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.LinkedTransferQueue;
21		import static java.util.concurrent.TimeUnit.MILLISECONDS;
22	<	import junit.framework.Test;
22	<	import junit.framework.TestSuite;
22	>	import static java.util.concurrent.TimeUnit.NANOSECONDS;
23
24	+	@SuppressWarnings({"unchecked", "rawtypes"})
25		public class LinkedTransferQueueTest extends JSR166TestCase {
26
27	+	public static class Generic extends BlockingQueueTest {
28	+	protected BlockingQueue emptyCollection() {
29	+	return new LinkedTransferQueue();
30	+	}
31	+	}
32	+
33		public static void main(String[] args) {
34		junit.textui.TestRunner.run(suite());
35		}
36
37		public static Test suite() {
38	<	return new TestSuite(LinkedTransferQueueTest.class);
38	>	return newTestSuite(LinkedTransferQueueTest.class,
39	>	new Generic().testSuite());
40		}
41
42		/**
#	Line 48 | Line 56 | public class LinkedTransferQueueTest ext
56		try {
57		new LinkedTransferQueue(null);
58		shouldThrow();
59	<	} catch (NullPointerException success) {
52	<	}
59	>	} catch (NullPointerException success) {}
60		}
61
62		/**
#	Line 57 | Line 64 | public class LinkedTransferQueueTest ext
64		* NullPointerException
65		*/
66		public void testConstructor3() {
67	+	Collection<Integer> elements = Arrays.asList(new Integer[SIZE]);
68		try {
69	<	Integer[] ints = new Integer[SIZE];
62	<	new LinkedTransferQueue(Arrays.asList(ints));
69	>	new LinkedTransferQueue(elements);
70		shouldThrow();
71	<	} catch (NullPointerException success) {
65	<	}
71	>	} catch (NullPointerException success) {}
72		}
73
74		/**
#	Line 70 | Line 76 | public class LinkedTransferQueueTest ext
76		* throws NullPointerException
77		*/
78		public void testConstructor4() {
79	+	Integer[] ints = new Integer[SIZE];
80	+	for (int i = 0; i < SIZE-1; ++i)
81	+	ints[i] = i;
82	+	Collection<Integer> elements = Arrays.asList(ints);
83		try {
84	<	Integer[] ints = new Integer[SIZE];
75	<	for (int i = 0; i < SIZE - 1; ++i) {
76	<	ints[i] = i;
77	<	}
78	<	new LinkedTransferQueue(Arrays.asList(ints));
84	>	new LinkedTransferQueue(elements);
85		shouldThrow();
86	<	} catch (NullPointerException success) {
81	<	}
86	>	} catch (NullPointerException success) {}
87		}
88
89		/**
90		* Queue contains all elements of the collection it is initialized by
91		*/
92		public void testConstructor5() {
93	<	try {
94	<	Integer[] ints = new Integer[SIZE];
95	<	for (int i = 0; i < SIZE; ++i) {
96	<	ints[i] = i;
97	<	}
98	<	LinkedTransferQueue q
99	<	= new LinkedTransferQueue(Arrays.asList(ints));
100	<	for (int i = 0; i < SIZE; ++i) {
101	<	assertEquals(ints[i], q.poll());
102	<	}
103	<	} finally {
93	>	Integer[] ints = new Integer[SIZE];
94	>	for (int i = 0; i < SIZE; ++i) {
95	>	ints[i] = i;
96	>	}
97	>	List intList = Arrays.asList(ints);
98	>	LinkedTransferQueue q
99	>	= new LinkedTransferQueue(intList);
100	>	assertEquals(q.size(), intList.size());
101	>	assertEquals(q.toString(), intList.toString());
102	>	assertTrue(Arrays.equals(q.toArray(),
103	>	intList.toArray()));
104	>	assertTrue(Arrays.equals(q.toArray(new Object[0]),
105	>	intList.toArray(new Object[0])));
106	>	assertTrue(Arrays.equals(q.toArray(new Object[SIZE]),
107	>	intList.toArray(new Object[SIZE])));
108	>	for (int i = 0; i < SIZE; ++i) {
109	>	assertEquals(ints[i], q.poll());
110		}
111		}
112
113		/**
114	<	* Remaining capacity never decrease nor increase on add or remove
114	>	* remainingCapacity() always returns Integer.MAX_VALUE
115		*/
116		public void testRemainingCapacity() {
117		LinkedTransferQueue<Integer> q = populatedQueue(SIZE);
#	Line 117 | Line 128 | public class LinkedTransferQueueTest ext
128		}
129
130		/**
120	–	* offer(null) throws NullPointerException
121	–	*/
122	–	public void testOfferNull() {
123	–	try {
124	–	LinkedTransferQueue q = new LinkedTransferQueue();
125	–	q.offer(null);
126	–	shouldThrow();
127	–	} catch (NullPointerException success) {
128	–	}
129	–	}
130	–
131	–	/**
132	–	* add(null) throws NullPointerException
133	–	*/
134	–	public void testAddNull() {
135	–	try {
136	–	LinkedTransferQueue q = new LinkedTransferQueue();
137	–	q.add(null);
138	–	shouldThrow();
139	–	} catch (NullPointerException success) {
140	–	}
141	–	}
142	–
143	–	/**
144	–	* addAll(null) throws NullPointerException
145	–	*/
146	–	public void testAddAll1() {
147	–	try {
148	–	LinkedTransferQueue q = new LinkedTransferQueue();
149	–	q.addAll(null);
150	–	shouldThrow();
151	–	} catch (NullPointerException success) {
152	–	}
153	–	}
154	–
155	–	/**
131		* addAll(this) throws IllegalArgumentException
132		*/
133		public void testAddAllSelf() {
#	Line 160 | Line 135 | public class LinkedTransferQueueTest ext
135		LinkedTransferQueue q = populatedQueue(SIZE);
136		q.addAll(q);
137		shouldThrow();
138	<	} catch (IllegalArgumentException success) {
164	<	}
165	<	}
166	<
167	<	/**
168	<	* addAll of a collection with null elements throws NullPointerException
169	<	*/
170	<	public void testAddAll2() {
171	<	try {
172	<	LinkedTransferQueue q = new LinkedTransferQueue();
173	<	Integer[] ints = new Integer[SIZE];
174	<	q.addAll(Arrays.asList(ints));
175	<	shouldThrow();
176	<	} catch (NullPointerException success) {
177	<	}
138	>	} catch (IllegalArgumentException success) {}
139		}
140
141		/**
#	Line 190 | Line 151 | public class LinkedTransferQueueTest ext
151		}
152		q.addAll(Arrays.asList(ints));
153		shouldThrow();
154	<	} catch (NullPointerException success) {
194	<	}
154	>	} catch (NullPointerException success) {}
155		}
156
157		/**
#	Line 212 | Line 172 | public class LinkedTransferQueueTest ext
172		}
173
174		/**
215	–	* put(null) throws NullPointerException
216	–	*/
217	–	public void testPutNull() throws InterruptedException {
218	–	try {
219	–	LinkedTransferQueue q = new LinkedTransferQueue();
220	–	q.put(null);
221	–	shouldThrow();
222	–	} catch (NullPointerException success) {}
223	–	}
224	–
225	–	/**
175		* all elements successfully put are contained
176		*/
177		public void testPut() {
178		LinkedTransferQueue<Integer> q = new LinkedTransferQueue<Integer>();
179		for (int i = 0; i < SIZE; ++i) {
180	+	assertEquals(i, q.size());
181		q.put(i);
182		assertTrue(q.contains(i));
183		}
234	–	assertEquals(q.size(), SIZE);
184		}
185
186		/**
#	Line 245 | Line 194 | public class LinkedTransferQueueTest ext
194		}
195
196		/**
197	<	* take blocks interruptibly when empty
249	<	*/
250	<	public void testTakeFromEmpty() throws InterruptedException {
251	<	final LinkedTransferQueue q = new LinkedTransferQueue();
252	<	Thread t = new Thread(new CheckedInterruptedRunnable() {
253	<	void realRun() throws InterruptedException {
254	<	q.take();
255	<	}});
256	<	t.start();
257	<	Thread.sleep(SHORT_DELAY_MS);
258	<	t.interrupt();
259	<	t.join();
260	<	}
261	<
262	<	/**
263	<	* Take removes existing elements until empty, then blocks interruptibly
197	>	* take removes existing elements until empty, then blocks interruptibly
198		*/
199		public void testBlockingTake() throws InterruptedException {
200	<	Thread t = new Thread(new CheckedInterruptedRunnable() {
201	<	void realRun() throws InterruptedException {
202	<	LinkedTransferQueue<Integer> q = populatedQueue(SIZE);
200	>	final BlockingQueue q = populatedQueue(SIZE);
201	>	final CountDownLatch pleaseInterrupt = new CountDownLatch(1);
202	>	Thread t = newStartedThread(new CheckedRunnable() {
203	>	public void realRun() throws InterruptedException {
204		for (int i = 0; i < SIZE; ++i) {
205	<	threadAssertEquals(i, (int) q.take());
205	>	assertEquals(i, q.take());
206		}
207	<	q.take();
207	>
208	>	Thread.currentThread().interrupt();
209	>	try {
210	>	q.take();
211	>	shouldThrow();
212	>	} catch (InterruptedException success) {}
213	>	assertFalse(Thread.interrupted());
214	>
215	>	pleaseInterrupt.countDown();
216	>	try {
217	>	q.take();
218	>	shouldThrow();
219	>	} catch (InterruptedException success) {}
220	>	assertFalse(Thread.interrupted());
221		}});
222	<	t.start();
223	<	Thread.sleep(SHORT_DELAY_MS);
222	>
223	>	await(pleaseInterrupt);
224	>	assertThreadStaysAlive(t);
225		t.interrupt();
226	<	t.join();
226	>	awaitTermination(t);
227		}
228
229		/**
230		* poll succeeds unless empty
231		*/
232	<	public void testPoll() {
232	>	public void testPoll() throws InterruptedException {
233		LinkedTransferQueue<Integer> q = populatedQueue(SIZE);
234		for (int i = 0; i < SIZE; ++i) {
235		assertEquals(i, (int) q.poll());
236		}
237		assertNull(q.poll());
238	+	checkEmpty(q);
239		}
240
241		/**
242	<	* timed pool with zero timeout succeeds when non-empty, else times out
242	>	* timed poll with zero timeout succeeds when non-empty, else times out
243		*/
244		public void testTimedPoll0() throws InterruptedException {
245		LinkedTransferQueue<Integer> q = populatedQueue(SIZE);
#	Line 297 | Line 247 | public class LinkedTransferQueueTest ext
247		assertEquals(i, (int) q.poll(0, MILLISECONDS));
248		}
249		assertNull(q.poll(0, MILLISECONDS));
250	+	checkEmpty(q);
251		}
252
253		/**
254	<	* timed pool with nonzero timeout succeeds when non-empty, else times out
254	>	* timed poll with nonzero timeout succeeds when non-empty, else times out
255		*/
256		public void testTimedPoll() throws InterruptedException {
257		LinkedTransferQueue<Integer> q = populatedQueue(SIZE);
258		for (int i = 0; i < SIZE; ++i) {
259	<	assertEquals(i, (int) q.poll(SHORT_DELAY_MS, MILLISECONDS));
260	<	}
261	<	assertNull(q.poll(SHORT_DELAY_MS, MILLISECONDS));
259	>	long startTime = System.nanoTime();
260	>	assertEquals(i, (int) q.poll(LONG_DELAY_MS, MILLISECONDS));
261	>	assertTrue(millisElapsedSince(startTime) < LONG_DELAY_MS);
262	>	}
263	>	long startTime = System.nanoTime();
264	>	assertNull(q.poll(timeoutMillis(), MILLISECONDS));
265	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis());
266	>	checkEmpty(q);
267		}
268
269		/**
#	Line 315 | Line 271 | public class LinkedTransferQueueTest ext
271		* returning timeout status
272		*/
273		public void testInterruptedTimedPoll() throws InterruptedException {
274	<	Thread t = new Thread(new CheckedInterruptedRunnable() {
275	<	void realRun() throws InterruptedException {
276	<	LinkedTransferQueue<Integer> q = populatedQueue(SIZE);
274	>	final BlockingQueue<Integer> q = populatedQueue(SIZE);
275	>	final CountDownLatch aboutToWait = new CountDownLatch(1);
276	>	Thread t = newStartedThread(new CheckedRunnable() {
277	>	public void realRun() throws InterruptedException {
278		for (int i = 0; i < SIZE; ++i) {
279	<	threadAssertEquals(i, (int) q.poll(SHORT_DELAY_MS,
280	<	MILLISECONDS));
279	>	long t0 = System.nanoTime();
280	>	assertEquals(i, (int) q.poll(LONG_DELAY_MS, MILLISECONDS));
281	>	assertTrue(millisElapsedSince(t0) < SMALL_DELAY_MS);
282	>	}
283	>	long t0 = System.nanoTime();
284	>	aboutToWait.countDown();
285	>	try {
286	>	q.poll(MEDIUM_DELAY_MS, MILLISECONDS);
287	>	shouldThrow();
288	>	} catch (InterruptedException success) {
289	>	assertTrue(millisElapsedSince(t0) < MEDIUM_DELAY_MS);
290		}
325	–	q.poll(SHORT_DELAY_MS, MILLISECONDS);
291		}});
292	<	t.start();
293	<	Thread.sleep(SHORT_DELAY_MS);
292	>
293	>	aboutToWait.await();
294	>	waitForThreadToEnterWaitState(t, SMALL_DELAY_MS);
295		t.interrupt();
296	<	t.join();
296	>	awaitTermination(t, MEDIUM_DELAY_MS);
297	>	checkEmpty(q);
298		}
299
300		/**
301	<	* timed poll before a delayed offer fails; after offer succeeds;
302	<	* on interruption throws
301	>	* timed poll after thread interrupted throws InterruptedException
302	>	* instead of returning timeout status
303		*/
304	<	public void testTimedPollWithOffer() throws InterruptedException {
305	<	final LinkedTransferQueue q = new LinkedTransferQueue();
306	<	Thread t = new Thread(new CheckedInterruptedRunnable() {
307	<	void realRun() throws InterruptedException {
308	<	threadAssertNull(q.poll(SHORT_DELAY_MS, MILLISECONDS));
309	<	q.poll(LONG_DELAY_MS, MILLISECONDS);
310	<	q.poll(LONG_DELAY_MS, MILLISECONDS);
304	>	public void testTimedPollAfterInterrupt() throws InterruptedException {
305	>	final BlockingQueue<Integer> q = populatedQueue(SIZE);
306	>	Thread t = newStartedThread(new CheckedRunnable() {
307	>	public void realRun() throws InterruptedException {
308	>	Thread.currentThread().interrupt();
309	>	for (int i = 0; i < SIZE; ++i) {
310	>	long t0 = System.nanoTime();
311	>	assertEquals(i, (int) q.poll(LONG_DELAY_MS, MILLISECONDS));
312	>	assertTrue(millisElapsedSince(t0) < SMALL_DELAY_MS);
313	>	}
314	>	try {
315	>	q.poll(MEDIUM_DELAY_MS, MILLISECONDS);
316	>	shouldThrow();
317	>	} catch (InterruptedException success) {}
318		}});
319	<	t.start();
320	<	Thread.sleep(SMALL_DELAY_MS);
321	<	assertTrue(q.offer(zero, SHORT_DELAY_MS, MILLISECONDS));
348	<	t.interrupt();
349	<	t.join();
319	>
320	>	awaitTermination(t, MEDIUM_DELAY_MS);
321	>	checkEmpty(q);
322		}
323
324		/**
325		* peek returns next element, or null if empty
326		*/
327	<	public void testPeek() {
327	>	public void testPeek() throws InterruptedException {
328		LinkedTransferQueue<Integer> q = populatedQueue(SIZE);
329		for (int i = 0; i < SIZE; ++i) {
330		assertEquals(i, (int) q.peek());
#	Line 361 | Line 333 | public class LinkedTransferQueueTest ext
333		i != (int) q.peek());
334		}
335		assertNull(q.peek());
336	+	checkEmpty(q);
337		}
338
339		/**
340		* element returns next element, or throws NoSuchElementException if empty
341		*/
342	<	public void testElement() {
342	>	public void testElement() throws InterruptedException {
343		LinkedTransferQueue<Integer> q = populatedQueue(SIZE);
344		for (int i = 0; i < SIZE; ++i) {
345		assertEquals(i, (int) q.element());
#	Line 375 | Line 348 | public class LinkedTransferQueueTest ext
348		try {
349		q.element();
350		shouldThrow();
351	<	} catch (NoSuchElementException success) {
352	<	}
351	>	} catch (NoSuchElementException success) {}
352	>	checkEmpty(q);
353		}
354
355		/**
356		* remove removes next element, or throws NoSuchElementException if empty
357		*/
358	<	public void testRemove() {
358	>	public void testRemove() throws InterruptedException {
359		LinkedTransferQueue<Integer> q = populatedQueue(SIZE);
360		for (int i = 0; i < SIZE; ++i) {
361		assertEquals(i, (int) q.remove());
#	Line 390 | Line 363 | public class LinkedTransferQueueTest ext
363		try {
364		q.remove();
365		shouldThrow();
366	<	} catch (NoSuchElementException success) {
367	<	}
395	<	}
396	<
397	<	/**
398	<	* remove(x) removes x and returns true if present
399	<	*/
400	<	public void testRemoveElement() {
401	<	LinkedTransferQueue q = populatedQueue(SIZE);
402	<	for (int i = 1; i < SIZE; i += 2) {
403	<	assertTrue(q.remove(i));
404	<	}
405	<	for (int i = 0; i < SIZE; i += 2) {
406	<	assertTrue(q.remove(i));
407	<	assertFalse(q.remove(i + 1));
408	<	}
409	<	assertTrue(q.isEmpty());
366	>	} catch (NoSuchElementException success) {}
367	>	checkEmpty(q);
368		}
369
370		/**
#	Line 419 | Line 377 | public class LinkedTransferQueueTest ext
377		assertTrue(q.remove(one));
378		assertTrue(q.remove(two));
379		assertTrue(q.add(three));
380	<	assertTrue(q.take() != null);
380	>	assertSame(q.take(), three);
381		}
382
383		/**
#	Line 437 | Line 395 | public class LinkedTransferQueueTest ext
395		/**
396		* clear removes all elements
397		*/
398	<	public void testClear() {
398	>	public void testClear() throws InterruptedException {
399		LinkedTransferQueue q = populatedQueue(SIZE);
400		q.clear();
401	<	assertTrue(q.isEmpty());
444	<	assertEquals(0, q.size());
401	>	checkEmpty(q);
402		assertEquals(Integer.MAX_VALUE, q.remainingCapacity());
403		q.add(one);
404		assertFalse(q.isEmpty());
405	+	assertEquals(1, q.size());
406		assertTrue(q.contains(one));
407		q.clear();
408	<	assertTrue(q.isEmpty());
408	>	checkEmpty(q);
409		}
410
411		/**
#	Line 501 | Line 459 | public class LinkedTransferQueueTest ext
459		}
460
461		/**
462	<	* toArray contains all elements
462	>	* toArray() contains all elements in FIFO order
463		*/
464	<	public void testToArray() throws InterruptedException {
464	>	public void testToArray() {
465		LinkedTransferQueue q = populatedQueue(SIZE);
466		Object[] o = q.toArray();
467		for (int i = 0; i < o.length; i++) {
468	<	assertEquals(o[i], q.take());
468	>	assertSame(o[i], q.poll());
469		}
470		}
471
472		/**
473	<	* toArray(a) contains all elements
473	>	* toArray(a) contains all elements in FIFO order
474		*/
475	<	public void testToArray2() throws InterruptedException {
475	>	public void testToArray2() {
476		LinkedTransferQueue<Integer> q = populatedQueue(SIZE);
477		Integer[] ints = new Integer[SIZE];
478	<	ints = q.toArray(ints);
478	>	Integer[] array = q.toArray(ints);
479	>	assertSame(ints, array);
480		for (int i = 0; i < ints.length; i++) {
481	<	assertEquals(ints[i], q.take());
481	>	assertSame(ints[i], q.poll());
482		}
483		}
484
485		/**
486	<	* toArray(null) throws NullPointerException
528	<	*/
529	<	public void testToArray_BadArg() {
530	<	try {
531	<	LinkedTransferQueue q = populatedQueue(SIZE);
532	<	Object o[] = q.toArray(null);
533	<	shouldThrow();
534	<	} catch (NullPointerException success) {
535	<	}
536	<	}
537	<
538	<	/**
539	<	* toArray with incompatible array type throws CCE
486	>	* toArray(incompatible array type) throws ArrayStoreException
487		*/
488		public void testToArray1_BadArg() {
489	+	LinkedTransferQueue q = populatedQueue(SIZE);
490		try {
491	<	LinkedTransferQueue q = populatedQueue(SIZE);
544	<	Object o[] = q.toArray(new String[10]);
491	>	q.toArray(new String[10]);
492		shouldThrow();
493	<	} catch (ArrayStoreException success) {
547	<	}
493	>	} catch (ArrayStoreException success) {}
494		}
495
496		/**
#	Line 553 | Line 499 | public class LinkedTransferQueueTest ext
499		public void testIterator() throws InterruptedException {
500		LinkedTransferQueue q = populatedQueue(SIZE);
501		Iterator it = q.iterator();
502	+	int i = 0;
503		while (it.hasNext()) {
504	<	assertEquals(it.next(), q.take());
504	>	assertEquals(it.next(), i++);
505		}
506	+	assertEquals(i, SIZE);
507		}
508
509		/**
510	<	* iterator.remove removes current element
510	>	* iterator.remove() removes current element
511		*/
512		public void testIteratorRemove() {
513		final LinkedTransferQueue q = new LinkedTransferQueue();
#	Line 572 | Line 520 | public class LinkedTransferQueueTest ext
520		it.remove();
521
522		it = q.iterator();
523	<	assertEquals(it.next(), one);
524	<	assertEquals(it.next(), three);
523	>	assertSame(it.next(), one);
524	>	assertSame(it.next(), three);
525		assertFalse(it.hasNext());
526		}
527
#	Line 617 | Line 565 | public class LinkedTransferQueueTest ext
565		LinkedTransferQueue q = populatedQueue(SIZE);
566		String s = q.toString();
567		for (int i = 0; i < SIZE; ++i) {
568	<	assertTrue(s.indexOf(String.valueOf(i)) >= 0);
568	>	assertTrue(s.contains(String.valueOf(i)));
569		}
570		}
571
#	Line 626 | Line 574 | public class LinkedTransferQueueTest ext
574		*/
575		public void testOfferInExecutor() {
576		final LinkedTransferQueue q = new LinkedTransferQueue();
577	<	q.add(one);
630	<	q.add(two);
577	>	final CheckedBarrier threadsStarted = new CheckedBarrier(2);
578		ExecutorService executor = Executors.newFixedThreadPool(2);
579
580		executor.execute(new CheckedRunnable() {
581	<	void realRun() {
582	<	threadAssertTrue(q.offer(three, MEDIUM_DELAY_MS,
583	<	MILLISECONDS));
581	>	public void realRun() throws InterruptedException {
582	>	threadsStarted.await();
583	>	assertTrue(q.offer(one, LONG_DELAY_MS, MILLISECONDS));
584		}});
585
586		executor.execute(new CheckedRunnable() {
587	<	void realRun() throws InterruptedException {
588	<	Thread.sleep(SMALL_DELAY_MS);
589	<	threadAssertEquals(one, q.take());
587	>	public void realRun() throws InterruptedException {
588	>	threadsStarted.await();
589	>	assertSame(one, q.take());
590	>	checkEmpty(q);
591		}});
592
593		joinPool(executor);
594		}
595
596		/**
597	<	* poll retrieves elements across Executor threads
597	>	* timed poll retrieves elements across Executor threads
598		*/
599		public void testPollInExecutor() {
600		final LinkedTransferQueue q = new LinkedTransferQueue();
601	+	final CheckedBarrier threadsStarted = new CheckedBarrier(2);
602		ExecutorService executor = Executors.newFixedThreadPool(2);
603
604		executor.execute(new CheckedRunnable() {
605	<	void realRun() throws InterruptedException {
606	<	threadAssertNull(q.poll());
607	<	threadAssertTrue(null != q.poll(MEDIUM_DELAY_MS,
608	<	MILLISECONDS));
609	<	threadAssertTrue(q.isEmpty());
605	>	public void realRun() throws InterruptedException {
606	>	assertNull(q.poll());
607	>	threadsStarted.await();
608	>	assertSame(one, q.poll(LONG_DELAY_MS, MILLISECONDS));
609	>	checkEmpty(q);
610		}});
611
612		executor.execute(new CheckedRunnable() {
613	<	void realRun() throws InterruptedException {
614	<	Thread.sleep(SMALL_DELAY_MS);
613	>	public void realRun() throws InterruptedException {
614	>	threadsStarted.await();
615		q.put(one);
616		}});
617
#	Line 673 | Line 622 | public class LinkedTransferQueueTest ext
622		* A deserialized serialized queue has same elements in same order
623		*/
624		public void testSerialization() throws Exception {
625	<	LinkedTransferQueue q = populatedQueue(SIZE);
626	<
678	<	ByteArrayOutputStream bout = new ByteArrayOutputStream(10000);
679	<	ObjectOutputStream out
680	<	= new ObjectOutputStream(new BufferedOutputStream(bout));
681	<	out.writeObject(q);
682	<	out.close();
683	<
684	<	ByteArrayInputStream bin
685	<	= new ByteArrayInputStream(bout.toByteArray());
686	<	ObjectInputStream in
687	<	= new ObjectInputStream(new BufferedInputStream(bin));
688	<	LinkedTransferQueue r = (LinkedTransferQueue) in.readObject();
689	<
690	<	assertEquals(q.size(), r.size());
691	<	while (!q.isEmpty()) {
692	<	assertEquals(q.remove(), r.remove());
693	<	}
694	<	}
625	>	Queue x = populatedQueue(SIZE);
626	>	Queue y = serialClone(x);
627
628	<	/**
629	<	* drainTo(null) throws NullPointerException
630	<	*/
631	<	public void testDrainToNull() {
632	<	LinkedTransferQueue q = populatedQueue(SIZE);
633	<	try {
634	<	q.drainTo(null);
703	<	shouldThrow();
704	<	} catch (NullPointerException success) {
705	<	}
706	<	}
707	<
708	<	/**
709	<	* drainTo(this) throws IllegalArgumentException
710	<	*/
711	<	public void testDrainToSelf() {
712	<	LinkedTransferQueue q = populatedQueue(SIZE);
713	<	try {
714	<	q.drainTo(q);
715	<	shouldThrow();
716	<	} catch (IllegalArgumentException success) {
628	>	assertTrue(x != y);
629	>	assertEquals(x.size(), y.size());
630	>	assertEquals(x.toString(), y.toString());
631	>	assertTrue(Arrays.equals(x.toArray(), y.toArray()));
632	>	while (!x.isEmpty()) {
633	>	assertFalse(y.isEmpty());
634	>	assertEquals(x.remove(), y.remove());
635		}
636	+	assertTrue(y.isEmpty());
637		}
638
639		/**
#	Line 724 | Line 643 | public class LinkedTransferQueueTest ext
643		LinkedTransferQueue q = populatedQueue(SIZE);
644		ArrayList l = new ArrayList();
645		q.drainTo(l);
646	<	assertEquals(q.size(), 0);
647	<	assertEquals(l.size(), SIZE);
646	>	assertEquals(0, q.size());
647	>	assertEquals(SIZE, l.size());
648		for (int i = 0; i < SIZE; ++i) {
649	<	assertEquals(l.get(i), i);
649	>	assertEquals(i, l.get(i));
650		}
651		q.add(zero);
652		q.add(one);
#	Line 736 | Line 655 | public class LinkedTransferQueueTest ext
655		assertTrue(q.contains(one));
656		l.clear();
657		q.drainTo(l);
658	<	assertEquals(q.size(), 0);
659	<	assertEquals(l.size(), 2);
658	>	assertEquals(0, q.size());
659	>	assertEquals(2, l.size());
660		for (int i = 0; i < 2; ++i) {
661	<	assertEquals(l.get(i), i);
661	>	assertEquals(i, l.get(i));
662		}
663		}
664
665		/**
666	<	* drainTo empties full queue, unblocking a waiting put.
666	>	* drainTo(c) empties full queue, unblocking a waiting put.
667		*/
668		public void testDrainToWithActivePut() throws InterruptedException {
669		final LinkedTransferQueue q = populatedQueue(SIZE);
670	<	Thread t = new Thread(new CheckedRunnable() {
671	<	void realRun() {
670	>	Thread t = newStartedThread(new CheckedRunnable() {
671	>	public void realRun() {
672		q.put(SIZE + 1);
673		}});
755	–	t.start();
674		ArrayList l = new ArrayList();
675		q.drainTo(l);
676		assertTrue(l.size() >= SIZE);
677	<	for (int i = 0; i < SIZE; ++i) {
678	<	assertEquals(l.get(i), i);
679	<	}
762	<	t.join();
677	>	for (int i = 0; i < SIZE; ++i)
678	>	assertEquals(i, l.get(i));
679	>	awaitTermination(t, MEDIUM_DELAY_MS);
680		assertTrue(q.size() + l.size() >= SIZE);
681		}
682
683		/**
684	<	* drainTo(null, n) throws NullPointerException
768	<	*/
769	<	public void testDrainToNullN() {
770	<	LinkedTransferQueue q = populatedQueue(SIZE);
771	<	try {
772	<	q.drainTo(null, 0);
773	<	shouldThrow();
774	<	} catch (NullPointerException success) {
775	<	}
776	<	}
777	<
778	<	/**
779	<	* drainTo(this, n) throws IllegalArgumentException
780	<	*/
781	<	public void testDrainToSelfN() {
782	<	LinkedTransferQueue q = populatedQueue(SIZE);
783	<	try {
784	<	q.drainTo(q, 0);
785	<	shouldThrow();
786	<	} catch (IllegalArgumentException success) {
787	<	}
788	<	}
789	<
790	<	/**
791	<	* drainTo(c, n) empties first max {n, size} elements of queue into c
684	>	* drainTo(c, n) empties first min(n, size) elements of queue into c
685		*/
686		public void testDrainToN() {
687		LinkedTransferQueue q = new LinkedTransferQueue();
#	Line 799 | Line 692 | public class LinkedTransferQueueTest ext
692		ArrayList l = new ArrayList();
693		q.drainTo(l, i);
694		int k = (i < SIZE) ? i : SIZE;
695	<	assertEquals(l.size(), k);
696	<	assertEquals(q.size(), SIZE - k);
697	<	for (int j = 0; j < k; ++j) {
698	<	assertEquals(l.get(j), j);
806	<	}
695	>	assertEquals(k, l.size());
696	>	assertEquals(SIZE - k, q.size());
697	>	for (int j = 0; j < k; ++j)
698	>	assertEquals(j, l.get(j));
699		while (q.poll() != null)
700		;
701		}
702		}
703
704		/**
705	<	* poll and take decrement the waiting consumer count
705	>	* timed poll() or take() increments the waiting consumer count;
706	>	* offer(e) decrements the waiting consumer count
707		*/
708		public void testWaitingConsumer() throws InterruptedException {
709		final LinkedTransferQueue q = new LinkedTransferQueue();
710	<	final ConsumerObserver waiting = new ConsumerObserver();
711	<	new Thread(new CheckedRunnable() {
712	<	void realRun() {
713	<	threadAssertTrue(q.hasWaitingConsumer());
714	<	waiting.setWaitingConsumer(q.getWaitingConsumerCount());
715	<	threadAssertTrue(q.offer(new Object()));
716	<	}}).start();
717	<	assertTrue(q.poll(LONG_DELAY_MS, MILLISECONDS) != null);
718	<	assertTrue(q.getWaitingConsumerCount()
719	<	< waiting.getWaitingConsumers());
710	>	assertEquals(0, q.getWaitingConsumerCount());
711	>	assertFalse(q.hasWaitingConsumer());
712	>	final CountDownLatch threadStarted = new CountDownLatch(1);
713	>
714	>	Thread t = newStartedThread(new CheckedRunnable() {
715	>	public void realRun() throws InterruptedException {
716	>	threadStarted.countDown();
717	>	assertSame(one, q.poll(LONG_DELAY_MS, MILLISECONDS));
718	>	assertEquals(0, q.getWaitingConsumerCount());
719	>	assertFalse(q.hasWaitingConsumer());
720	>	}});
721	>
722	>	threadStarted.await();
723	>	waitForThreadToEnterWaitState(t, SMALL_DELAY_MS);
724	>	assertEquals(1, q.getWaitingConsumerCount());
725	>	assertTrue(q.hasWaitingConsumer());
726	>
727	>	assertTrue(q.offer(one));
728	>	assertEquals(0, q.getWaitingConsumerCount());
729	>	assertFalse(q.hasWaitingConsumer());
730	>
731	>	awaitTermination(t, MEDIUM_DELAY_MS);
732		}
733
734		/**
#	Line 834 | Line 739 | public class LinkedTransferQueueTest ext
739		LinkedTransferQueue q = new LinkedTransferQueue();
740		q.transfer(null);
741		shouldThrow();
742	<	} catch (NullPointerException ex) {
838	<	}
742	>	} catch (NullPointerException success) {}
743		}
744
745		/**
#	Line 845 | Line 749 | public class LinkedTransferQueueTest ext
749		public void testTransfer2() throws InterruptedException {
750		final LinkedTransferQueue<Integer> q
751		= new LinkedTransferQueue<Integer>();
752	+	final CountDownLatch threadStarted = new CountDownLatch(1);
753
754	<	new Thread(new CheckedRunnable() {
755	<	void realRun() throws InterruptedException {
756	<	q.transfer(SIZE);
757	<	threadAssertTrue(q.isEmpty());
758	<	}}).start();
754	>	Thread t = newStartedThread(new CheckedRunnable() {
755	>	public void realRun() throws InterruptedException {
756	>	threadStarted.countDown();
757	>	q.transfer(five);
758	>	checkEmpty(q);
759	>	}});
760
761	<	Thread.sleep(SHORT_DELAY_MS);
761	>	threadStarted.await();
762	>	waitForThreadToEnterWaitState(t, SMALL_DELAY_MS);
763		assertEquals(1, q.size());
764	<	assertEquals(SIZE, (int) q.poll());
765	<	assertTrue(q.isEmpty());
764	>	assertSame(five, q.poll());
765	>	checkEmpty(q);
766	>	awaitTermination(t, MEDIUM_DELAY_MS);
767		}
768
769		/**
#	Line 865 | Line 773 | public class LinkedTransferQueueTest ext
773		final LinkedTransferQueue<Integer> q
774		= new LinkedTransferQueue<Integer>();
775
776	<	Thread first = new Thread(new CheckedRunnable() {
777	<	void realRun() throws InterruptedException {
778	<	Integer i = SIZE + 1;
779	<	q.transfer(i);
780	<	threadAssertTrue(!q.contains(i));
873	<	threadAssertEquals(1, q.size());
776	>	Thread first = newStartedThread(new CheckedRunnable() {
777	>	public void realRun() throws InterruptedException {
778	>	q.transfer(four);
779	>	assertTrue(!q.contains(four));
780	>	assertEquals(1, q.size());
781		}});
875	–	first.start();
782
783	<	Thread interruptedThread = new Thread(new CheckedInterruptedRunnable() {
784	<	void realRun() throws InterruptedException {
785	<	while (q.size() == 0)
786	<	Thread.yield();
787	<	q.transfer(SIZE);
788	<	}});
789	<	interruptedThread.start();
783	>	Thread interruptedThread = newStartedThread(
784	>	new CheckedInterruptedRunnable() {
785	>	public void realRun() throws InterruptedException {
786	>	while (q.isEmpty())
787	>	Thread.yield();
788	>	q.transfer(five);
789	>	}});
790
791		while (q.size() < 2)
792		Thread.yield();
793		assertEquals(2, q.size());
794	<	assertEquals(SIZE + 1, (int) q.poll());
794	>	assertSame(four, q.poll());
795		first.join();
796		assertEquals(1, q.size());
797		interruptedThread.interrupt();
798		interruptedThread.join();
799	<	assertEquals(0, q.size());
894	<	assertTrue(q.isEmpty());
799	>	checkEmpty(q);
800		}
801
802		/**
#	Line 900 | Line 805 | public class LinkedTransferQueueTest ext
805		*/
806		public void testTransfer4() throws InterruptedException {
807		final LinkedTransferQueue q = new LinkedTransferQueue();
808	<	new Thread(new CheckedRunnable() {
809	<	void realRun() throws InterruptedException {
808	>
809	>	Thread t = newStartedThread(new CheckedRunnable() {
810	>	public void realRun() throws InterruptedException {
811		q.transfer(four);
812	<	threadAssertFalse(q.contains(four));
813	<	threadAssertEquals(three, q.poll());
814	<	}}).start();
815	<	Thread.sleep(MEDIUM_DELAY_MS);
812	>	assertFalse(q.contains(four));
813	>	assertSame(three, q.poll());
814	>	}});
815	>
816	>	while (q.isEmpty())
817	>	Thread.yield();
818	>	assertFalse(q.isEmpty());
819	>	assertEquals(1, q.size());
820		assertTrue(q.offer(three));
821	<	assertEquals(four, q.poll());
821	>	assertSame(four, q.poll());
822	>	awaitTermination(t, MEDIUM_DELAY_MS);
823		}
824
825		/**
#	Line 919 | Line 830 | public class LinkedTransferQueueTest ext
830		final LinkedTransferQueue<Integer> q
831		= new LinkedTransferQueue<Integer>();
832
833	<	new Thread(new CheckedRunnable() {
834	<	void realRun() throws InterruptedException {
835	<	q.transfer(SIZE);
836	<	threadAssertTrue(q.isEmpty());
837	<	}}).start();
833	>	Thread t = newStartedThread(new CheckedRunnable() {
834	>	public void realRun() throws InterruptedException {
835	>	q.transfer(four);
836	>	checkEmpty(q);
837	>	}});
838
839	<	Thread.sleep(SHORT_DELAY_MS);
840	<	assertEquals(SIZE, (int) q.take());
841	<	assertTrue(q.isEmpty());
839	>	while (q.isEmpty())
840	>	Thread.yield();
841	>	assertFalse(q.isEmpty());
842	>	assertEquals(1, q.size());
843	>	assertSame(four, q.take());
844	>	checkEmpty(q);
845	>	awaitTermination(t, MEDIUM_DELAY_MS);
846		}
847
848		/**
#	Line 937 | Line 852 | public class LinkedTransferQueueTest ext
852		try {
853		final LinkedTransferQueue q = new LinkedTransferQueue();
854		q.tryTransfer(null);
855	<	this.shouldThrow();
856	<	} catch (NullPointerException ex) {
942	<	}
855	>	shouldThrow();
856	>	} catch (NullPointerException success) {}
857		}
858
859		/**
860		* tryTransfer returns false and does not enqueue if there are no
861		* consumers waiting to poll or take.
862		*/
863	<	public void testTryTransfer2() {
863	>	public void testTryTransfer2() throws InterruptedException {
864		final LinkedTransferQueue q = new LinkedTransferQueue();
865		assertFalse(q.tryTransfer(new Object()));
866		assertFalse(q.hasWaitingConsumer());
867	<	assertTrue(q.isEmpty());
954	<	assertEquals(0, q.size());
867	>	checkEmpty(q);
868		}
869
870		/**
#	Line 961 | Line 874 | public class LinkedTransferQueueTest ext
874		public void testTryTransfer3() throws InterruptedException {
875		final Object hotPotato = new Object();
876		final LinkedTransferQueue q = new LinkedTransferQueue();
877	<	new Thread(new CheckedRunnable() {
878	<	void realRun() {
877	>
878	>	Thread t = newStartedThread(new CheckedRunnable() {
879	>	public void realRun() {
880		while (! q.hasWaitingConsumer())
881		Thread.yield();
882	<	threadAssertTrue(q.hasWaitingConsumer());
883	<	threadAssertTrue(q.isEmpty());
884	<	threadAssertTrue(q.size() == 0);
885	<	threadAssertTrue(q.tryTransfer(hotPotato));
886	<	}}).start();
887	<	assertTrue(q.poll(LONG_DELAY_MS, MILLISECONDS) == hotPotato);
888	<	assertTrue(q.isEmpty());
882	>	assertTrue(q.hasWaitingConsumer());
883	>	checkEmpty(q);
884	>	assertTrue(q.tryTransfer(hotPotato));
885	>	}});
886	>
887	>	assertSame(hotPotato, q.poll(MEDIUM_DELAY_MS, MILLISECONDS));
888	>	checkEmpty(q);
889	>	awaitTermination(t, MEDIUM_DELAY_MS);
890		}
891
892		/**
#	Line 981 | Line 896 | public class LinkedTransferQueueTest ext
896		public void testTryTransfer4() throws InterruptedException {
897		final Object hotPotato = new Object();
898		final LinkedTransferQueue q = new LinkedTransferQueue();
899	<	new Thread(new CheckedRunnable() {
900	<	void realRun() {
899	>
900	>	Thread t = newStartedThread(new CheckedRunnable() {
901	>	public void realRun() {
902		while (! q.hasWaitingConsumer())
903		Thread.yield();
904	<	threadAssertTrue(q.hasWaitingConsumer());
905	<	threadAssertTrue(q.isEmpty());
906	<	threadAssertTrue(q.size() == 0);
907	<	threadAssertTrue(q.tryTransfer(hotPotato));
908	<	}}).start();
909	<	assertTrue(q.take() == hotPotato);
910	<	assertTrue(q.isEmpty());
904	>	assertTrue(q.hasWaitingConsumer());
905	>	checkEmpty(q);
906	>	assertTrue(q.tryTransfer(hotPotato));
907	>	}});
908	>
909	>	assertSame(q.take(), hotPotato);
910	>	checkEmpty(q);
911	>	awaitTermination(t, MEDIUM_DELAY_MS);
912		}
913
914		/**
915	<	* tryTransfer waits the amount given if interrupted, and
999	<	* throws interrupted exception
915	>	* tryTransfer blocks interruptibly if no takers
916		*/
917		public void testTryTransfer5() throws InterruptedException {
918		final LinkedTransferQueue q = new LinkedTransferQueue();
919	<	Thread toInterrupt = new Thread(new CheckedInterruptedRunnable() {
920	<	void realRun() throws InterruptedException {
921	<	q.tryTransfer(new Object(), LONG_DELAY_MS, MILLISECONDS);
919	>	final CountDownLatch pleaseInterrupt = new CountDownLatch(1);
920	>	assertTrue(q.isEmpty());
921	>
922	>	Thread t = newStartedThread(new CheckedRunnable() {
923	>	public void realRun() throws InterruptedException {
924	>	Thread.currentThread().interrupt();
925	>	try {
926	>	q.tryTransfer(new Object(), LONG_DELAY_MS, MILLISECONDS);
927	>	shouldThrow();
928	>	} catch (InterruptedException success) {}
929	>	assertFalse(Thread.interrupted());
930	>
931	>	pleaseInterrupt.countDown();
932	>	try {
933	>	q.tryTransfer(new Object(), LONG_DELAY_MS, MILLISECONDS);
934	>	shouldThrow();
935	>	} catch (InterruptedException success) {}
936	>	assertFalse(Thread.interrupted());
937		}});
938	<	toInterrupt.start();
939	<	Thread.sleep(SMALL_DELAY_MS);
940	<	toInterrupt.interrupt();
938	>
939	>	await(pleaseInterrupt);
940	>	assertThreadStaysAlive(t);
941	>	t.interrupt();
942	>	awaitTermination(t);
943	>	checkEmpty(q);
944		}
945
946		/**
947	<	* tryTransfer gives up after the timeout and return false
947	>	* tryTransfer gives up after the timeout and returns false
948		*/
949		public void testTryTransfer6() throws InterruptedException {
950		final LinkedTransferQueue q = new LinkedTransferQueue();
951	<	new Thread(new CheckedRunnable() {
952	<	void realRun() throws InterruptedException {
953	<	threadAssertFalse
954	<	(q.tryTransfer(new Object(),
955	<	SHORT_DELAY_MS, MILLISECONDS));
956	<	}}).start();
957	<	Thread.sleep(LONG_DELAY_MS);
958	<	assertTrue(q.isEmpty());
951	>
952	>	Thread t = newStartedThread(new CheckedRunnable() {
953	>	public void realRun() throws InterruptedException {
954	>	long t0 = System.nanoTime();
955	>	assertFalse(q.tryTransfer(new Object(),
956	>	timeoutMillis(), MILLISECONDS));
957	>	assertTrue(millisElapsedSince(t0) >= timeoutMillis());
958	>	checkEmpty(q);
959	>	}});
960	>
961	>	awaitTermination(t);
962	>	checkEmpty(q);
963		}
964
965		/**
#	Line 1031 | Line 969 | public class LinkedTransferQueueTest ext
969		public void testTryTransfer7() throws InterruptedException {
970		final LinkedTransferQueue q = new LinkedTransferQueue();
971		assertTrue(q.offer(four));
972	<	new Thread(new CheckedRunnable() {
973	<	void realRun() throws InterruptedException {
974	<	threadAssertTrue(q.tryTransfer(five,
975	<	LONG_DELAY_MS, MILLISECONDS));
976	<	threadAssertTrue(q.isEmpty());
977	<	}}).start();
978	<	Thread.sleep(SHORT_DELAY_MS);
972	>
973	>	Thread t = newStartedThread(new CheckedRunnable() {
974	>	public void realRun() throws InterruptedException {
975	>	assertTrue(q.tryTransfer(five, MEDIUM_DELAY_MS, MILLISECONDS));
976	>	checkEmpty(q);
977	>	}});
978	>
979	>	while (q.size() != 2)
980	>	Thread.yield();
981		assertEquals(2, q.size());
982	<	assertEquals(four, q.poll());
983	<	assertEquals(five, q.poll());
984	<	assertTrue(q.isEmpty());
982	>	assertSame(four, q.poll());
983	>	assertSame(five, q.poll());
984	>	checkEmpty(q);
985	>	awaitTermination(t, MEDIUM_DELAY_MS);
986		}
987
988		/**
989	<	* tryTransfer attempts to enqueue into the q and fails returning
990	<	* false not enqueueing and the successive poll is null
989	>	* tryTransfer attempts to enqueue into the queue and fails
990	>	* returning false not enqueueing and the successive poll is null
991		*/
992		public void testTryTransfer8() throws InterruptedException {
993		final LinkedTransferQueue q = new LinkedTransferQueue();
994		assertTrue(q.offer(four));
995		assertEquals(1, q.size());
996	<	assertFalse(q.tryTransfer(five, SHORT_DELAY_MS, MILLISECONDS));
996	>	long t0 = System.nanoTime();
997	>	assertFalse(q.tryTransfer(five, timeoutMillis(), MILLISECONDS));
998	>	assertTrue(millisElapsedSince(t0) >= timeoutMillis());
999		assertEquals(1, q.size());
1000	<	assertEquals(four, q.poll());
1058	<	threadAssertTrue(q.isEmpty());
1000	>	assertSame(four, q.poll());
1001		assertNull(q.poll());
1002	+	checkEmpty(q);
1003		}
1004
1005		private LinkedTransferQueue<Integer> populatedQueue(int n) {
1006		LinkedTransferQueue<Integer> q = new LinkedTransferQueue<Integer>();
1007	<	assertTrue(q.isEmpty());
1007	>	checkEmpty(q);
1008		for (int i = 0; i < n; i++) {
1009		assertEquals(i, q.size());
1010		assertTrue(q.offer(i));
#	Line 1070 | Line 1013 | public class LinkedTransferQueueTest ext
1013		assertFalse(q.isEmpty());
1014		return q;
1015		}
1073	–
1074	–	private static class ConsumerObserver {
1075	–
1076	–	private int waitingConsumers;
1077	–
1078	–	private ConsumerObserver() {
1079	–	}
1080	–
1081	–	private void setWaitingConsumer(int i) {
1082	–	this.waitingConsumers = i;
1083	–	}
1084	–
1085	–	private int getWaitingConsumers() {
1086	–	return waitingConsumers;
1087	–	}
1088	–	}
1016		}

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