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root/jsr166/jsr166/src/test/tck/FutureTaskTest.java

Comparing jsr166/src/test/tck/FutureTaskTest.java (file contents):
Revision 1.11 by dl, Mon Dec 29 19:05:40 2003 UTC vs.
Revision 1.44 by jsr166, Sun May 24 01:42:14 2015 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
5	<	* Other contributors include Andrew Wright, Jeffrey Hayes,
6	<	* Pat Fisher, Mike Judd.
4	>	* http://creativecommons.org/publicdomain/zero/1.0/
5	>	* Other contributors include Andrew Wright, Jeffrey Hayes,
6	>	* Pat Fisher, Mike Judd.
7		*/
8
9	<	import junit.framework.*;
10	<	import java.util.concurrent.*;
11	<	import java.util.*;
9	>	import static java.util.concurrent.TimeUnit.MILLISECONDS;
10	>	import static java.util.concurrent.TimeUnit.NANOSECONDS;
11	>	import static java.util.concurrent.TimeUnit.SECONDS;
12	>
13	>	import java.util.ArrayList;
14	>	import java.util.List;
15	>	import java.util.NoSuchElementException;
16	>	import java.util.concurrent.Callable;
17	>	import java.util.concurrent.CancellationException;
18	>	import java.util.concurrent.CountDownLatch;
19	>	import java.util.concurrent.ExecutionException;
20	>	import java.util.concurrent.Executors;
21	>	import java.util.concurrent.ExecutorService;
22	>	import java.util.concurrent.Future;
23	>	import java.util.concurrent.FutureTask;
24	>	import java.util.concurrent.TimeoutException;
25	>	import java.util.concurrent.atomic.AtomicInteger;
26	>
27	>	import junit.framework.Test;
28	>	import junit.framework.TestSuite;
29
30		public class FutureTaskTest extends JSR166TestCase {
31
32		public static void main(String[] args) {
33	<	junit.textui.TestRunner.run (suite());
33	>	main(suite(), args);
34		}
35		public static Test suite() {
36	<	return new TestSuite(FutureTaskTest.class);
36	>	return new TestSuite(FutureTaskTest.class);
37	>	}
38	>
39	>	void checkIsDone(Future<?> f) {
40	>	assertTrue(f.isDone());
41	>	assertFalse(f.cancel(false));
42	>	assertFalse(f.cancel(true));
43	>	if (f instanceof PublicFutureTask) {
44	>	PublicFutureTask pf = (PublicFutureTask) f;
45	>	assertEquals(1, pf.doneCount());
46	>	assertFalse(pf.runAndReset());
47	>	assertEquals(1, pf.doneCount());
48	>	Object r = null; Object exInfo = null;
49	>	try {
50	>	r = f.get();
51	>	} catch (CancellationException t) {
52	>	exInfo = CancellationException.class;
53	>	} catch (ExecutionException t) {
54	>	exInfo = t.getCause();
55	>	} catch (Throwable t) {
56	>	threadUnexpectedException(t);
57	>	}
58	>
59	>	// Check that run and runAndReset have no effect.
60	>	int savedRunCount = pf.runCount();
61	>	pf.run();
62	>	pf.runAndReset();
63	>	assertEquals(savedRunCount, pf.runCount());
64	>	try {
65	>	assertSame(r, f.get());
66	>	} catch (CancellationException t) {
67	>	assertSame(exInfo, CancellationException.class);
68	>	} catch (ExecutionException t) {
69	>	assertSame(exInfo, t.getCause());
70	>	} catch (Throwable t) {
71	>	threadUnexpectedException(t);
72	>	}
73	>	assertTrue(f.isDone());
74	>	}
75	>	}
76	>
77	>	void checkNotDone(Future<?> f) {
78	>	assertFalse(f.isDone());
79	>	assertFalse(f.isCancelled());
80	>	if (f instanceof PublicFutureTask) {
81	>	PublicFutureTask pf = (PublicFutureTask) f;
82	>	assertEquals(0, pf.doneCount());
83	>	assertEquals(0, pf.setCount());
84	>	assertEquals(0, pf.setExceptionCount());
85	>	}
86	>	}
87	>
88	>	void checkIsRunning(Future<?> f) {
89	>	checkNotDone(f);
90	>	if (f instanceof FutureTask) {
91	>	FutureTask ft = (FutureTask<?>) f;
92	>	// Check that run methods do nothing
93	>	ft.run();
94	>	if (f instanceof PublicFutureTask) {
95	>	PublicFutureTask pf = (PublicFutureTask) f;
96	>	int savedRunCount = pf.runCount();
97	>	pf.run();
98	>	assertFalse(pf.runAndReset());
99	>	assertEquals(savedRunCount, pf.runCount());
100	>	}
101	>	checkNotDone(f);
102	>	}
103	>	}
104	>
105	>	<T> void checkCompletedNormally(Future<T> f, T expected) {
106	>	checkIsDone(f);
107	>	assertFalse(f.isCancelled());
108	>
109	>	try {
110	>	assertSame(expected, f.get());
111	>	} catch (Throwable fail) { threadUnexpectedException(fail); }
112	>	try {
113	>	assertSame(expected, f.get(5L, SECONDS));
114	>	} catch (Throwable fail) { threadUnexpectedException(fail); }
115	>	}
116	>
117	>	void checkCancelled(Future<?> f) {
118	>	checkIsDone(f);
119	>	assertTrue(f.isCancelled());
120	>
121	>	try {
122	>	f.get();
123	>	shouldThrow();
124	>	} catch (CancellationException success) {
125	>	} catch (Throwable fail) { threadUnexpectedException(fail); }
126	>
127	>	try {
128	>	f.get(5L, SECONDS);
129	>	shouldThrow();
130	>	} catch (CancellationException success) {
131	>	} catch (Throwable fail) { threadUnexpectedException(fail); }
132	>	}
133	>
134	>	void tryToConfuseDoneTask(PublicFutureTask pf) {
135	>	pf.set(new Object());
136	>	pf.setException(new Error());
137	>	for (boolean mayInterruptIfRunning : new boolean[] { true, false }) {
138	>	pf.cancel(mayInterruptIfRunning);
139	>	}
140	>	}
141	>
142	>	void checkCompletedAbnormally(Future<?> f, Throwable t) {
143	>	checkIsDone(f);
144	>	assertFalse(f.isCancelled());
145	>
146	>	try {
147	>	f.get();
148	>	shouldThrow();
149	>	} catch (ExecutionException success) {
150	>	assertSame(t, success.getCause());
151	>	} catch (Throwable fail) { threadUnexpectedException(fail); }
152	>
153	>	try {
154	>	f.get(5L, SECONDS);
155	>	shouldThrow();
156	>	} catch (ExecutionException success) {
157	>	assertSame(t, success.getCause());
158	>	} catch (Throwable fail) { threadUnexpectedException(fail); }
159		}
160
161		/**
162		* Subclass to expose protected methods
163		*/
164		static class PublicFutureTask extends FutureTask {
165	<	public PublicFutureTask(Callable r) { super(r); }
166	<	public boolean runAndReset() { return super.runAndReset(); }
167	<	public void set(Object x) { super.set(x); }
168	<	public void setException(Throwable t) { super.setException(t); }
165	>	private final AtomicInteger runCount;
166	>	private final AtomicInteger doneCount = new AtomicInteger(0);
167	>	private final AtomicInteger runAndResetCount = new AtomicInteger(0);
168	>	private final AtomicInteger setCount = new AtomicInteger(0);
169	>	private final AtomicInteger setExceptionCount = new AtomicInteger(0);
170	>	public int runCount() { return runCount.get(); }
171	>	public int doneCount() { return doneCount.get(); }
172	>	public int runAndResetCount() { return runAndResetCount.get(); }
173	>	public int setCount() { return setCount.get(); }
174	>	public int setExceptionCount() { return setExceptionCount.get(); }
175	>
176	>	PublicFutureTask(Runnable runnable) {
177	>	this(runnable, seven);
178	>	}
179	>	PublicFutureTask(Runnable runnable, Object result) {
180	>	this(runnable, result, new AtomicInteger(0));
181	>	}
182	>	private PublicFutureTask(final Runnable runnable, Object result,
183	>	final AtomicInteger runCount) {
184	>	super(new Runnable() {
185	>	public void run() {
186	>	runCount.getAndIncrement();
187	>	runnable.run();
188	>	}}, result);
189	>	this.runCount = runCount;
190	>	}
191	>	PublicFutureTask(Callable callable) {
192	>	this(callable, new AtomicInteger(0));
193	>	}
194	>	private PublicFutureTask(final Callable callable,
195	>	final AtomicInteger runCount) {
196	>	super(new Callable() {
197	>	public Object call() throws Exception {
198	>	runCount.getAndIncrement();
199	>	return callable.call();
200	>	}});
201	>	this.runCount = runCount;
202	>	}
203	>	@Override public void done() {
204	>	assertTrue(isDone());
205	>	doneCount.incrementAndGet();
206	>	super.done();
207	>	}
208	>	@Override public boolean runAndReset() {
209	>	runAndResetCount.incrementAndGet();
210	>	return super.runAndReset();
211	>	}
212	>	@Override public void set(Object x) {
213	>	setCount.incrementAndGet();
214	>	super.set(x);
215	>	}
216	>	@Override public void setException(Throwable t) {
217	>	setExceptionCount.incrementAndGet();
218	>	super.setException(t);
219	>	}
220	>	}
221	>
222	>	class Counter extends CheckedRunnable {
223	>	final AtomicInteger count = new AtomicInteger(0);
224	>	public int get() { return count.get(); }
225	>	public void realRun() {
226	>	count.getAndIncrement();
227	>	}
228		}
229
230		/**
231	<	* Creating a future with a null callable throws NPE
231	>	* creating a future with a null callable throws NullPointerException
232		*/
233		public void testConstructor() {
234		try {
235	<	FutureTask task = new FutureTask(null);
235	>	new FutureTask(null);
236		shouldThrow();
237	<	}
40	<	catch(NullPointerException success) {
41	<	}
237	>	} catch (NullPointerException success) {}
238		}
239
240		/**
241	<	* creating a future with null runnable fails
241	>	* creating a future with null runnable throws NullPointerException
242		*/
243		public void testConstructor2() {
244		try {
245	<	FutureTask task = new FutureTask(null, Boolean.TRUE);
245	>	new FutureTask(null, Boolean.TRUE);
246		shouldThrow();
247	<	}
52	<	catch(NullPointerException success) {
53	<	}
247	>	} catch (NullPointerException success) {}
248		}
249
250		/**
251		* isDone is true when a task completes
252		*/
253		public void testIsDone() {
254	<	FutureTask task = new FutureTask( new NoOpCallable());
255	<	task.run();
256	<	assertTrue(task.isDone());
257	<	assertFalse(task.isCancelled());
254	>	PublicFutureTask task = new PublicFutureTask(new NoOpCallable());
255	>	assertFalse(task.isDone());
256	>	task.run();
257	>	assertTrue(task.isDone());
258	>	checkCompletedNormally(task, Boolean.TRUE);
259	>	assertEquals(1, task.runCount());
260		}
261
262		/**
#	Line 68 | Line 264 | public class FutureTaskTest extends JSR1
264		*/
265		public void testRunAndReset() {
266		PublicFutureTask task = new PublicFutureTask(new NoOpCallable());
267	<	assertTrue(task.runAndReset());
268	<	assertFalse(task.isDone());
267	>	for (int i = 0; i < 3; i++) {
268	>	assertTrue(task.runAndReset());
269	>	checkNotDone(task);
270	>	assertEquals(i + 1, task.runCount());
271	>	assertEquals(i + 1, task.runAndResetCount());
272	>	assertEquals(0, task.setCount());
273	>	assertEquals(0, task.setExceptionCount());
274	>	}
275		}
276
277		/**
278		* runAndReset after cancellation fails
279		*/
280	<	public void testResetAfterCancel() {
281	<	PublicFutureTask task = new PublicFutureTask(new NoOpCallable());
282	<	assertTrue(task.cancel(false));
283	<	assertFalse(task.runAndReset());
284	<	assertTrue(task.isDone());
285	<	assertTrue(task.isCancelled());
280	>	public void testRunAndResetAfterCancel() {
281	>	for (boolean mayInterruptIfRunning : new boolean[] { true, false }) {
282	>	PublicFutureTask task = new PublicFutureTask(new NoOpCallable());
283	>	assertTrue(task.cancel(mayInterruptIfRunning));
284	>	for (int i = 0; i < 3; i++) {
285	>	assertFalse(task.runAndReset());
286	>	assertEquals(0, task.runCount());
287	>	assertEquals(i + 1, task.runAndResetCount());
288	>	assertEquals(0, task.setCount());
289	>	assertEquals(0, task.setExceptionCount());
290	>	}
291	>	tryToConfuseDoneTask(task);
292	>	checkCancelled(task);
293	>	}
294		}
295
86	–
87	–
296		/**
297		* setting value causes get to return it
298		*/
299	<	public void testSet() {
299	>	public void testSet() throws Exception {
300		PublicFutureTask task = new PublicFutureTask(new NoOpCallable());
301		task.set(one);
302	<	try {
303	<	assertEquals(task.get(), one);
304	<	}
305	<	catch(Exception e) {
306	<	unexpectedException();
307	<	}
302	>	for (int i = 0; i < 3; i++) {
303	>	assertSame(one, task.get());
304	>	assertSame(one, task.get(LONG_DELAY_MS, MILLISECONDS));
305	>	assertEquals(1, task.setCount());
306	>	}
307	>	tryToConfuseDoneTask(task);
308	>	checkCompletedNormally(task, one);
309	>	assertEquals(0, task.runCount());
310		}
311
312		/**
313		* setException causes get to throw ExecutionException
314		*/
315	<	public void testSetException() {
315	>	public void testSetException_get() throws Exception {
316		Exception nse = new NoSuchElementException();
317		PublicFutureTask task = new PublicFutureTask(new NoOpCallable());
318		task.setException(nse);
319	+
320		try {
321	<	Object x = task.get();
321	>	task.get();
322		shouldThrow();
323	+	} catch (ExecutionException success) {
324	+	assertSame(nse, success.getCause());
325	+	checkCompletedAbnormally(task, nse);
326		}
327	<	catch(ExecutionException ee) {
328	<	Throwable cause = ee.getCause();
329	<	assertEquals(cause, nse);
330	<	}
331	<	catch(Exception e) {
332	<	unexpectedException();
327	>
328	>	try {
329	>	task.get(LONG_DELAY_MS, MILLISECONDS);
330	>	shouldThrow();
331	>	} catch (ExecutionException success) {
332	>	assertSame(nse, success.getCause());
333	>	checkCompletedAbnormally(task, nse);
334		}
335	+
336	+	assertEquals(1, task.setExceptionCount());
337	+	assertEquals(0, task.setCount());
338	+	tryToConfuseDoneTask(task);
339	+	checkCompletedAbnormally(task, nse);
340	+	assertEquals(0, task.runCount());
341		}
342
343		/**
344	<	*  Cancelling before running succeeds
344	>	* cancel(false) before run succeeds
345		*/
346		public void testCancelBeforeRun() {
347	<	FutureTask task = new FutureTask( new NoOpCallable());
347	>	PublicFutureTask task = new PublicFutureTask(new NoOpCallable());
348		assertTrue(task.cancel(false));
349	<	task.run();
350	<	assertTrue(task.isDone());
351	<	assertTrue(task.isCancelled());
349	>	task.run();
350	>	assertEquals(0, task.runCount());
351	>	assertEquals(0, task.setCount());
352	>	assertEquals(0, task.setExceptionCount());
353	>	assertTrue(task.isCancelled());
354	>	assertTrue(task.isDone());
355	>	tryToConfuseDoneTask(task);
356	>	assertEquals(0, task.runCount());
357	>	checkCancelled(task);
358		}
359
360		/**
361	<	* Cancel(true) before run succeeds
361	>	* cancel(true) before run succeeds
362		*/
363		public void testCancelBeforeRun2() {
364	<	FutureTask task = new FutureTask( new NoOpCallable());
364	>	PublicFutureTask task = new PublicFutureTask(new NoOpCallable());
365		assertTrue(task.cancel(true));
366	<	task.run();
367	<	assertTrue(task.isDone());
368	<	assertTrue(task.isCancelled());
366	>	task.run();
367	>	assertEquals(0, task.runCount());
368	>	assertEquals(0, task.setCount());
369	>	assertEquals(0, task.setExceptionCount());
370	>	assertTrue(task.isCancelled());
371	>	assertTrue(task.isDone());
372	>	tryToConfuseDoneTask(task);
373	>	assertEquals(0, task.runCount());
374	>	checkCancelled(task);
375		}
376
377		/**
378	<	* cancel of a completed task fails
378	>	* cancel(false) of a completed task fails
379		*/
380		public void testCancelAfterRun() {
381	<	FutureTask task = new FutureTask( new NoOpCallable());
382	<	task.run();
381	>	PublicFutureTask task = new PublicFutureTask(new NoOpCallable());
382	>	task.run();
383		assertFalse(task.cancel(false));
384	<	assertTrue(task.isDone());
385	<	assertFalse(task.isCancelled());
384	>	assertEquals(1, task.runCount());
385	>	assertEquals(1, task.setCount());
386	>	assertEquals(0, task.setExceptionCount());
387	>	tryToConfuseDoneTask(task);
388	>	checkCompletedNormally(task, Boolean.TRUE);
389	>	assertEquals(1, task.runCount());
390	>	}
391	>
392	>	/**
393	>	* cancel(true) of a completed task fails
394	>	*/
395	>	public void testCancelAfterRun2() {
396	>	PublicFutureTask task = new PublicFutureTask(new NoOpCallable());
397	>	task.run();
398	>	assertFalse(task.cancel(true));
399	>	assertEquals(1, task.runCount());
400	>	assertEquals(1, task.setCount());
401	>	assertEquals(0, task.setExceptionCount());
402	>	tryToConfuseDoneTask(task);
403	>	checkCompletedNormally(task, Boolean.TRUE);
404	>	assertEquals(1, task.runCount());
405		}
406
407		/**
408	<	* cancel(true) interrupts a running task
408	>	* cancel(true) interrupts a running task that subsequently succeeds
409		*/
410		public void testCancelInterrupt() {
411	<	FutureTask task = new FutureTask( new Callable() {
412	<	public Object call() {
411	>	final CountDownLatch pleaseCancel = new CountDownLatch(1);
412	>	final PublicFutureTask task =
413	>	new PublicFutureTask(new CheckedRunnable() {
414	>	public void realRun() {
415	>	pleaseCancel.countDown();
416		try {
417	<	Thread.sleep(MEDIUM_DELAY_MS);
418	<	threadShouldThrow();
419	<	}
420	<	catch (InterruptedException success) {}
421	<	return Boolean.TRUE;
422	<	} });
423	<	Thread t = new  Thread(task);
417	>	delay(LONG_DELAY_MS);
418	>	shouldThrow();
419	>	} catch (InterruptedException success) {}
420	>	}});
421	>
422	>	Thread t = newStartedThread(task);
423	>	await(pleaseCancel);
424	>	assertTrue(task.cancel(true));
425	>	assertTrue(task.isCancelled());
426	>	assertTrue(task.isDone());
427	>	awaitTermination(t);
428	>	assertEquals(1, task.runCount());
429	>	assertEquals(1, task.setCount());
430	>	assertEquals(0, task.setExceptionCount());
431	>	tryToConfuseDoneTask(task);
432	>	checkCancelled(task);
433	>	}
434	>
435	>	/**
436	>	* cancel(true) tries to interrupt a running task, but
437	>	* Thread.interrupt throws (simulating a restrictive security
438	>	* manager)
439	>	*/
440	>	public void testCancelInterrupt_ThrowsSecurityException() {
441	>	final CountDownLatch pleaseCancel = new CountDownLatch(1);
442	>	final CountDownLatch cancelled = new CountDownLatch(1);
443	>	final PublicFutureTask task =
444	>	new PublicFutureTask(new CheckedRunnable() {
445	>	public void realRun() {
446	>	pleaseCancel.countDown();
447	>	await(cancelled);
448	>	assertFalse(Thread.interrupted());
449	>	}});
450	>
451	>	final Thread t = new Thread(task) {
452	>	// Simulate a restrictive security manager.
453	>	@Override public void interrupt() {
454	>	throw new SecurityException();
455	>	}};
456	>	t.setDaemon(true);
457		t.start();
458	<
458	>
459	>	await(pleaseCancel);
460		try {
461	<	Thread.sleep(SHORT_DELAY_MS);
462	<	assertTrue(task.cancel(true));
463	<	t.join();
464	<	assertTrue(task.isDone());
465	<	assertTrue(task.isCancelled());
466	<	} catch(InterruptedException e){
467	<	unexpectedException();
468	<	}
461	>	task.cancel(true);
462	>	shouldThrow();
463	>	} catch (SecurityException expected) {}
464	>
465	>	// We failed to deliver the interrupt, but the world retains
466	>	// its sanity, as if we had done task.cancel(false)
467	>	assertTrue(task.isCancelled());
468	>	assertTrue(task.isDone());
469	>	assertEquals(1, task.runCount());
470	>	assertEquals(1, task.doneCount());
471	>	assertEquals(0, task.setCount());
472	>	assertEquals(0, task.setExceptionCount());
473	>	cancelled.countDown();
474	>	awaitTermination(t);
475	>	assertEquals(1, task.setCount());
476	>	assertEquals(0, task.setExceptionCount());
477	>	tryToConfuseDoneTask(task);
478	>	checkCancelled(task);
479		}
480
481	+	/**
482	+	* cancel(true) interrupts a running task that subsequently throws
483	+	*/
484	+	public void testCancelInterrupt_taskFails() {
485	+	final CountDownLatch pleaseCancel = new CountDownLatch(1);
486	+	final PublicFutureTask task =
487	+	new PublicFutureTask(new Runnable() {
488	+	public void run() {
489	+	pleaseCancel.countDown();
490	+	try {
491	+	delay(LONG_DELAY_MS);
492	+	threadShouldThrow();
493	+	} catch (InterruptedException success) {
494	+	} catch (Throwable t) { threadUnexpectedException(t); }
495	+	throw new RuntimeException();
496	+	}});
497	+
498	+	Thread t = newStartedThread(task);
499	+	await(pleaseCancel);
500	+	assertTrue(task.cancel(true));
501	+	assertTrue(task.isCancelled());
502	+	awaitTermination(t);
503	+	assertEquals(1, task.runCount());
504	+	assertEquals(0, task.setCount());
505	+	assertEquals(1, task.setExceptionCount());
506	+	tryToConfuseDoneTask(task);
507	+	checkCancelled(task);
508	+	}
509
510		/**
511		* cancel(false) does not interrupt a running task
512		*/
513		public void testCancelNoInterrupt() {
514	<	FutureTask task = new FutureTask( new Callable() {
515	<	public Object call() {
516	<	try {
517	<	Thread.sleep(MEDIUM_DELAY_MS);
518	<	}
519	<	catch (InterruptedException success) {
520	<	threadFail("should not interrupt");
521	<	}
514	>	final CountDownLatch pleaseCancel = new CountDownLatch(1);
515	>	final CountDownLatch cancelled = new CountDownLatch(1);
516	>	final PublicFutureTask task =
517	>	new PublicFutureTask(new CheckedCallable<Boolean>() {
518	>	public Boolean realCall() {
519	>	pleaseCancel.countDown();
520	>	await(cancelled);
521	>	assertFalse(Thread.interrupted());
522		return Boolean.TRUE;
523	<	} });
524	<	Thread t = new  Thread(task);
525	<	t.start();
526	<
527	<	try {
528	<	Thread.sleep(SHORT_DELAY_MS);
529	<	assertTrue(task.cancel(false));
530	<	t.join();
531	<	assertTrue(task.isDone());
532	<	assertTrue(task.isCancelled());
533	<	} catch(InterruptedException e){
534	<	unexpectedException();
535	<	}
523	>	}});
524	>
525	>	Thread t = newStartedThread(task);
526	>	await(pleaseCancel);
527	>	assertTrue(task.cancel(false));
528	>	assertTrue(task.isCancelled());
529	>	cancelled.countDown();
530	>	awaitTermination(t);
531	>	assertEquals(1, task.runCount());
532	>	assertEquals(1, task.setCount());
533	>	assertEquals(0, task.setExceptionCount());
534	>	tryToConfuseDoneTask(task);
535	>	checkCancelled(task);
536	>	}
537	>
538	>	/**
539	>	* run in one thread causes get in another thread to retrieve value
540	>	*/
541	>	public void testGetRun() {
542	>	final CountDownLatch pleaseRun = new CountDownLatch(2);
543	>
544	>	final PublicFutureTask task =
545	>	new PublicFutureTask(new CheckedCallable<Object>() {
546	>	public Object realCall() {
547	>	return two;
548	>	}});
549	>
550	>	Thread t1 = newStartedThread(new CheckedRunnable() {
551	>	public void realRun() throws Exception {
552	>	pleaseRun.countDown();
553	>	assertSame(two, task.get());
554	>	}});
555	>
556	>	Thread t2 = newStartedThread(new CheckedRunnable() {
557	>	public void realRun() throws Exception {
558	>	pleaseRun.countDown();
559	>	assertSame(two, task.get(2*LONG_DELAY_MS, MILLISECONDS));
560	>	}});
561	>
562	>	await(pleaseRun);
563	>	checkNotDone(task);
564	>	assertTrue(t1.isAlive());
565	>	assertTrue(t2.isAlive());
566	>	task.run();
567	>	checkCompletedNormally(task, two);
568	>	assertEquals(1, task.runCount());
569	>	assertEquals(1, task.setCount());
570	>	assertEquals(0, task.setExceptionCount());
571	>	awaitTermination(t1);
572	>	awaitTermination(t2);
573	>	tryToConfuseDoneTask(task);
574	>	checkCompletedNormally(task, two);
575		}
576
577		/**
578		* set in one thread causes get in another thread to retrieve value
579		*/
580	<	public void testGet1() {
581	<	final FutureTask ft = new FutureTask(new Callable() {
582	<	public Object call() {
583	<	try {
584	<	Thread.sleep(MEDIUM_DELAY_MS);
585	<	} catch(InterruptedException e){
586	<	threadUnexpectedException();
587	<	}
588	<	return Boolean.TRUE;
589	<	}
590	<	});
591	<	Thread t = new Thread(new Runnable() {
592	<	public void run() {
593	<	try {
594	<	ft.get();
595	<	} catch(Exception e){
596	<	threadUnexpectedException();
597	<	}
598	<	}
599	<	});
600	<	try {
601	<	assertFalse(ft.isDone());
602	<	assertFalse(ft.isCancelled());
603	<	t.start();
604	<	Thread.sleep(SHORT_DELAY_MS);
605	<	ft.run();
606	<	t.join();
607	<	assertTrue(ft.isDone());
608	<	assertFalse(ft.isCancelled());
609	<	} catch(InterruptedException e){
610	<	unexpectedException();
611	<
612	<	}
580	>	public void testGetSet() {
581	>	final CountDownLatch pleaseSet = new CountDownLatch(2);
582	>
583	>	final PublicFutureTask task =
584	>	new PublicFutureTask(new CheckedCallable<Object>() {
585	>	public Object realCall() throws InterruptedException {
586	>	return two;
587	>	}});
588	>
589	>	Thread t1 = newStartedThread(new CheckedRunnable() {
590	>	public void realRun() throws Exception {
591	>	pleaseSet.countDown();
592	>	assertSame(two, task.get());
593	>	}});
594	>
595	>	Thread t2 = newStartedThread(new CheckedRunnable() {
596	>	public void realRun() throws Exception {
597	>	pleaseSet.countDown();
598	>	assertSame(two, task.get(2*LONG_DELAY_MS, MILLISECONDS));
599	>	}});
600	>
601	>	await(pleaseSet);
602	>	checkNotDone(task);
603	>	assertTrue(t1.isAlive());
604	>	assertTrue(t2.isAlive());
605	>	task.set(two);
606	>	assertEquals(0, task.runCount());
607	>	assertEquals(1, task.setCount());
608	>	assertEquals(0, task.setExceptionCount());
609	>	tryToConfuseDoneTask(task);
610	>	checkCompletedNormally(task, two);
611	>	awaitTermination(t1);
612	>	awaitTermination(t2);
613		}
614
615		/**
616	<	* set in one thread causes timed get in another thread to retrieve value
617	<	*/
618	<	public void testTimedGet1() {
619	<	final FutureTask ft = new FutureTask(new Callable() {
620	<	public Object call() {
621	<	try {
622	<	Thread.sleep(MEDIUM_DELAY_MS);
623	<	} catch(InterruptedException e){
624	<	threadUnexpectedException();
625	<	}
626	<	return Boolean.TRUE;
627	<	}
628	<	});
629	<	Thread t = new Thread(new Runnable() {
630	<	public void run() {
631	<	try {
632	<	ft.get(SHORT_DELAY_MS, TimeUnit.MILLISECONDS);
633	<	} catch(TimeoutException success) {
634	<	} catch(Exception e){
635	<	threadUnexpectedException();
636	<	}
637	<	}
638	<	});
639	<	try {
640	<	assertFalse(ft.isDone());
641	<	assertFalse(ft.isCancelled());
642	<	t.start();
643	<	ft.run();
644	<	t.join();
645	<	assertTrue(ft.isDone());
646	<	assertFalse(ft.isCancelled());
647	<	} catch(InterruptedException e){
648	<	unexpectedException();
649	<
650	<	}
616	>	* Cancelling a task causes timed get in another thread to throw
617	>	* CancellationException
618	>	*/
619	>	public void testTimedGet_Cancellation() {
620	>	testTimedGet_Cancellation(false);
621	>	}
622	>	public void testTimedGet_Cancellation_interrupt() {
623	>	testTimedGet_Cancellation(true);
624	>	}
625	>	public void testTimedGet_Cancellation(final boolean mayInterruptIfRunning) {
626	>	final CountDownLatch pleaseCancel = new CountDownLatch(3);
627	>	final CountDownLatch cancelled = new CountDownLatch(1);
628	>	final Callable<Object> callable =
629	>	new CheckedCallable<Object>() {
630	>	public Object realCall() throws InterruptedException {
631	>	pleaseCancel.countDown();
632	>	if (mayInterruptIfRunning) {
633	>	try {
634	>	delay(2*LONG_DELAY_MS);
635	>	} catch (InterruptedException success) {}
636	>	} else {
637	>	await(cancelled);
638	>	}
639	>	return two;
640	>	}};
641	>	final PublicFutureTask task = new PublicFutureTask(callable);
642	>
643	>	Thread t1 = new ThreadShouldThrow(CancellationException.class) {
644	>	public void realRun() throws Exception {
645	>	pleaseCancel.countDown();
646	>	task.get();
647	>	}};
648	>	Thread t2 = new ThreadShouldThrow(CancellationException.class) {
649	>	public void realRun() throws Exception {
650	>	pleaseCancel.countDown();
651	>	task.get(2*LONG_DELAY_MS, MILLISECONDS);
652	>	}};
653	>	t1.start();
654	>	t2.start();
655	>	Thread t3 = newStartedThread(task);
656	>	await(pleaseCancel);
657	>	checkIsRunning(task);
658	>	task.cancel(mayInterruptIfRunning);
659	>	checkCancelled(task);
660	>	awaitTermination(t1);
661	>	awaitTermination(t2);
662	>	cancelled.countDown();
663	>	awaitTermination(t3);
664	>	assertEquals(1, task.runCount());
665	>	assertEquals(1, task.setCount());
666	>	assertEquals(0, task.setExceptionCount());
667	>	tryToConfuseDoneTask(task);
668	>	checkCancelled(task);
669		}
670
671		/**
672	<	*  Cancelling a task causes timed get in another thread to throw CancellationException
672	>	* A runtime exception in task causes get to throw ExecutionException
673		*/
674	<	public void testTimedGet_Cancellation() {
675	<	final FutureTask ft = new FutureTask(new Callable() {
676	<	public Object call() {
677	<	try {
678	<	Thread.sleep(SMALL_DELAY_MS);
679	<	threadShouldThrow();
680	<	} catch(InterruptedException e) {
681	<	}
682	<	return Boolean.TRUE;
683	<	}
684	<	});
685	<	try {
686	<	Thread t1 = new Thread(new Runnable() {
687	<	public void run() {
688	<	try {
689	<	ft.get(MEDIUM_DELAY_MS, TimeUnit.MILLISECONDS);
690	<	threadShouldThrow();
691	<	} catch(CancellationException success) {}
308	<	catch(Exception e){
309	<	threadUnexpectedException();
310	<	}
311	<	}
312	<	});
313	<	Thread t2 = new Thread(ft);
314	<	t1.start();
315	<	t2.start();
316	<	Thread.sleep(SHORT_DELAY_MS);
317	<	ft.cancel(true);
318	<	t1.join();
319	<	t2.join();
320	<	} catch(InterruptedException ie){
321	<	unexpectedException();
674	>	public void testGet_ExecutionException() throws InterruptedException {
675	>	final ArithmeticException e = new ArithmeticException();
676	>	final PublicFutureTask task = new PublicFutureTask(new Callable() {
677	>	public Object call() {
678	>	throw e;
679	>	}});
680	>
681	>	task.run();
682	>	assertEquals(1, task.runCount());
683	>	assertEquals(0, task.setCount());
684	>	assertEquals(1, task.setExceptionCount());
685	>	try {
686	>	task.get();
687	>	shouldThrow();
688	>	} catch (ExecutionException success) {
689	>	assertSame(e, success.getCause());
690	>	tryToConfuseDoneTask(task);
691	>	checkCompletedAbnormally(task, success.getCause());
692		}
693		}
694
695		/**
696	<	* Cancelling a task causes get in another thread to throw CancellationException
697	<	*/
698	<	public void testGet_Cancellation() {
699	<	final FutureTask ft = new FutureTask(new Callable() {
700	<	public Object call() {
701	<	try {
702	<	Thread.sleep(MEDIUM_DELAY_MS);
703	<	threadShouldThrow();
704	<	} catch(InterruptedException e){
705	<	}
706	<	return Boolean.TRUE;
707	<	}
708	<	});
709	<	try {
710	<	Thread t1 = new Thread(new Runnable() {
711	<	public void run() {
712	<	try {
343	<	ft.get();
344	<	threadShouldThrow();
345	<	} catch(CancellationException success){
346	<	}
347	<	catch(Exception e){
348	<	threadUnexpectedException();
349	<	}
350	<	}
351	<	});
352	<	Thread t2 = new Thread(ft);
353	<	t1.start();
354	<	t2.start();
355	<	Thread.sleep(SHORT_DELAY_MS);
356	<	ft.cancel(true);
357	<	t1.join();
358	<	t2.join();
359	<	} catch(InterruptedException success){
360	<	unexpectedException();
696	>	* A runtime exception in task causes timed get to throw ExecutionException
697	>	*/
698	>	public void testTimedGet_ExecutionException2() throws Exception {
699	>	final ArithmeticException e = new ArithmeticException();
700	>	final PublicFutureTask task = new PublicFutureTask(new Callable() {
701	>	public Object call() {
702	>	throw e;
703	>	}});
704	>
705	>	task.run();
706	>	try {
707	>	task.get(LONG_DELAY_MS, MILLISECONDS);
708	>	shouldThrow();
709	>	} catch (ExecutionException success) {
710	>	assertSame(e, success.getCause());
711	>	tryToConfuseDoneTask(task);
712	>	checkCompletedAbnormally(task, success.getCause());
713		}
714		}
363	–
715
716		/**
717	<	* A runtime exception in task causes get to throw ExecutionException
717	>	* get is interruptible
718	>	*/
719	>	public void testGet_interruptible() {
720	>	final CountDownLatch pleaseInterrupt = new CountDownLatch(1);
721	>	final FutureTask task = new FutureTask(new NoOpCallable());
722	>	Thread t = newStartedThread(new CheckedRunnable() {
723	>	public void realRun() throws Exception {
724	>	Thread.currentThread().interrupt();
725	>	try {
726	>	task.get();
727	>	shouldThrow();
728	>	} catch (InterruptedException success) {}
729	>	assertFalse(Thread.interrupted());
730	>
731	>	pleaseInterrupt.countDown();
732	>	try {
733	>	task.get();
734	>	shouldThrow();
735	>	} catch (InterruptedException success) {}
736	>	assertFalse(Thread.interrupted());
737	>	}});
738	>
739	>	await(pleaseInterrupt);
740	>	t.interrupt();
741	>	awaitTermination(t);
742	>	checkNotDone(task);
743	>	}
744	>
745	>	/**
746	>	* timed get is interruptible
747	>	*/
748	>	public void testTimedGet_interruptible() {
749	>	final CountDownLatch pleaseInterrupt = new CountDownLatch(1);
750	>	final FutureTask task = new FutureTask(new NoOpCallable());
751	>	Thread t = newStartedThread(new CheckedRunnable() {
752	>	public void realRun() throws Exception {
753	>	Thread.currentThread().interrupt();
754	>	try {
755	>	task.get(2*LONG_DELAY_MS, MILLISECONDS);
756	>	shouldThrow();
757	>	} catch (InterruptedException success) {}
758	>	assertFalse(Thread.interrupted());
759	>
760	>	pleaseInterrupt.countDown();
761	>	try {
762	>	task.get(2*LONG_DELAY_MS, MILLISECONDS);
763	>	shouldThrow();
764	>	} catch (InterruptedException success) {}
765	>	assertFalse(Thread.interrupted());
766	>	}});
767	>
768	>	await(pleaseInterrupt);
769	>	t.interrupt();
770	>	awaitTermination(t);
771	>	checkNotDone(task);
772	>	}
773	>
774	>	/**
775	>	* A timed out timed get throws TimeoutException
776		*/
777	<	public void testGet_ExecutionException() {
778	<	final FutureTask ft = new FutureTask(new Callable() {
779	<	public Object call() {
780	<	int i = 5/0;
781	<	return Boolean.TRUE;
782	<	}
783	<	});
784	<	try {
376	<	ft.run();
377	<	ft.get();
378	<	shouldThrow();
379	<	} catch(ExecutionException success){
380	<	}
381	<	catch(Exception e){
382	<	unexpectedException();
383	<	}
384	<	}
385	<
386	<	/**
387	<	*  A runtime exception in task causes timed get to throw ExecutionException
388	<	*/
389	<	public void testTimedGet_ExecutionException2() {
390	<	final FutureTask ft = new FutureTask(new Callable() {
391	<	public Object call() {
392	<	int i = 5/0;
393	<	return Boolean.TRUE;
394	<	}
395	<	});
396	<	try {
397	<	ft.run();
398	<	ft.get(SHORT_DELAY_MS, TimeUnit.MILLISECONDS);
399	<	shouldThrow();
400	<	} catch(ExecutionException success) {
401	<	} catch(TimeoutException success) { } // unlikely but OK
402	<	catch(Exception e){
403	<	unexpectedException();
404	<	}
405	<	}
406	<
407	<
408	<	/**
409	<	* Interrupting a waiting get causes it to throw InterruptedException
410	<	*/
411	<	public void testGet_InterruptedException() {
412	<	final FutureTask ft = new FutureTask(new NoOpCallable());
413	<	Thread t = new Thread(new Runnable() {
414	<	public void run() {
415	<	try {
416	<	ft.get();
417	<	threadShouldThrow();
418	<	} catch(InterruptedException success){
419	<	} catch(Exception e){
420	<	threadUnexpectedException();
421	<	}
422	<	}
423	<	});
424	<	try {
425	<	t.start();
426	<	Thread.sleep(SHORT_DELAY_MS);
427	<	t.interrupt();
428	<	t.join();
429	<	} catch(Exception e){
430	<	unexpectedException();
431	<	}
432	<	}
433	<
434	<	/**
435	<	*  Interrupting a waiting timed get causes it to throw InterruptedException
436	<	*/
437	<	public void testTimedGet_InterruptedException2() {
438	<	final FutureTask ft = new FutureTask(new NoOpCallable());
439	<	Thread t = new Thread(new Runnable() {
440	<	public void run() {
441	<	try {
442	<	ft.get(LONG_DELAY_MS,TimeUnit.MILLISECONDS);
443	<	threadShouldThrow();
444	<	} catch(InterruptedException success){}
445	<	catch(Exception e){
446	<	threadUnexpectedException();
447	<	}
448	<	}
449	<	});
450	<	try {
451	<	t.start();
452	<	Thread.sleep(SHORT_DELAY_MS);
453	<	t.interrupt();
454	<	t.join();
455	<	} catch(Exception e){
456	<	unexpectedException();
777	>	public void testGet_TimeoutException() throws Exception {
778	>	FutureTask task = new FutureTask(new NoOpCallable());
779	>	long startTime = System.nanoTime();
780	>	try {
781	>	task.get(timeoutMillis(), MILLISECONDS);
782	>	shouldThrow();
783	>	} catch (TimeoutException success) {
784	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis());
785		}
786		}
787	<
787	>
788		/**
789	<	* A timed out timed get throws TimeoutException
789	>	* timed get with null TimeUnit throws NullPointerException
790		*/
791	<	public void testGet_TimeoutException() {
792	<	try {
793	<	FutureTask ft = new FutureTask(new NoOpCallable());
794	<	ft.get(1,TimeUnit.MILLISECONDS);
795	<	shouldThrow();
796	<	} catch(TimeoutException success){}
797	<	catch(Exception success){
798	<	unexpectedException();
799	<	}
791	>	public void testGet_NullTimeUnit() throws Exception {
792	>	FutureTask task = new FutureTask(new NoOpCallable());
793	>	long[] timeouts = { Long.MIN_VALUE, 0L, Long.MAX_VALUE };
794	>
795	>	for (long timeout : timeouts) {
796	>	try {
797	>	task.get(timeout, null);
798	>	shouldThrow();
799	>	} catch (NullPointerException success) {}
800	>	}
801	>
802	>	task.run();
803	>
804	>	for (long timeout : timeouts) {
805	>	try {
806	>	task.get(timeout, null);
807	>	shouldThrow();
808	>	} catch (NullPointerException success) {}
809	>	}
810		}
811	<
811	>
812	>	/**
813	>	* timed get with most negative timeout works correctly (i.e. no
814	>	* underflow bug)
815	>	*/
816	>	public void testGet_NegativeInfinityTimeout() throws Exception {
817	>	final ExecutorService pool = Executors.newFixedThreadPool(10);
818	>	final Runnable nop = new Runnable() { public void run() {}};
819	>	final FutureTask<Void> task = new FutureTask<>(nop, null);
820	>	final List<Future<?>> futures = new ArrayList<>();
821	>	Runnable r = new Runnable() { public void run() {
822	>	for (long timeout : new long[] { 0L, -1L, Long.MIN_VALUE }) {
823	>	try {
824	>	task.get(timeout, NANOSECONDS);
825	>	shouldThrow();
826	>	} catch (TimeoutException success) {
827	>	} catch (Throwable fail) {threadUnexpectedException(fail);}}}};
828	>	for (int i = 0; i < 10; i++)
829	>	futures.add(pool.submit(r));
830	>	try {
831	>	joinPool(pool);
832	>	for (Future<?> future : futures)
833	>	checkCompletedNormally(future, null);
834	>	} finally {
835	>	task.run();         // last resort to help terminate
836	>	}
837	>	}
838	>
839		}

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