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Comparing jsr166/src/test/tck/FutureTaskTest.java (file contents):
Revision 1.9 by dl, Mon Dec 22 16:25:38 2003 UTC vs.
Revision 1.33 by jsr166, Thu Dec 20 04:58:53 2012 UTC

#	Line 1 | Line 1
1		/*
2	<	* Written by members of JCP JSR-166 Expert Group and released to the
3	<	* public domain. Use, modify, and redistribute this code in any way
4	<	* without acknowledgement. Other contributors include Andrew Wright,
5	<	* Jeffrey Hayes, Pat Fischer, Mike Judd.
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/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.*;
10	>	import java.security.Permission;
11	>	import java.util.concurrent.Callable;
12	>	import java.util.concurrent.CancellationException;
13	>	import java.util.concurrent.CountDownLatch;
14	>	import java.util.concurrent.ExecutionException;
15	>	import java.util.concurrent.Future;
16	>	import java.util.concurrent.FutureTask;
17	>	import java.util.concurrent.TimeoutException;
18	>	import java.util.concurrent.atomic.AtomicInteger;
19	>	import static java.util.concurrent.TimeUnit.MILLISECONDS;
20	>	import static java.util.concurrent.TimeUnit.SECONDS;
21		import java.util.*;
22
23		public class FutureTaskTest extends JSR166TestCase {
24
25		public static void main(String[] args) {
26	<	junit.textui.TestRunner.run (suite());
26	>	junit.textui.TestRunner.run(suite());
27		}
28		public static Test suite() {
29	<	return new TestSuite(FutureTaskTest.class);
29	>	return new TestSuite(FutureTaskTest.class);
30	>	}
31	>
32	>	void checkIsDone(Future<?> f) {
33	>	assertTrue(f.isDone());
34	>	assertFalse(f.cancel(false));
35	>	assertFalse(f.cancel(true));
36	>	if (f instanceof PublicFutureTask) {
37	>	PublicFutureTask pf = (PublicFutureTask) f;
38	>	assertEquals(1, pf.doneCount());
39	>	assertFalse(pf.runAndReset());
40	>	assertEquals(1, pf.doneCount());
41	>
42	>	// Check that run and runAndReset have no effect.
43	>	int savedRunCount = pf.runCount();
44	>	int savedSetCount = pf.setCount();
45	>	int savedSetExceptionCount = pf.setExceptionCount();
46	>	pf.run();
47	>	pf.runAndReset();
48	>	assertEquals(savedRunCount, pf.runCount());
49	>	assertEquals(savedSetCount, pf.setCount());
50	>	assertEquals(savedSetExceptionCount, pf.setExceptionCount());
51	>	assertTrue(f.isDone());
52	>	}
53	>	}
54	>
55	>	void checkNotDone(Future<?> f) {
56	>	assertFalse(f.isDone());
57	>	assertFalse(f.isCancelled());
58	>	if (f instanceof PublicFutureTask) {
59	>	PublicFutureTask pf = (PublicFutureTask) f;
60	>	assertEquals(0, pf.doneCount());
61	>	assertEquals(0, pf.setCount());
62	>	assertEquals(0, pf.setExceptionCount());
63	>	}
64	>	}
65	>
66	>	void checkIsRunning(Future<?> f) {
67	>	checkNotDone(f);
68	>	if (f instanceof FutureTask) {
69	>	FutureTask ft = (FutureTask<?>) f;
70	>	// Check that run methods do nothing
71	>	ft.run();
72	>	if (f instanceof PublicFutureTask)
73	>	assertFalse(((PublicFutureTask) f).runAndReset());
74	>	checkNotDone(f);
75	>	}
76	>	}
77	>
78	>	<T> void checkCompletedNormally(Future<T> f, T expected) {
79	>	checkIsDone(f);
80	>	assertFalse(f.isCancelled());
81	>
82	>	try {
83	>	assertSame(expected, f.get());
84	>	} catch (Throwable fail) { threadUnexpectedException(fail); }
85	>	try {
86	>	assertSame(expected, f.get(5L, SECONDS));
87	>	} catch (Throwable fail) { threadUnexpectedException(fail); }
88	>	}
89	>
90	>	void checkCancelled(Future<?> f) {
91	>	checkIsDone(f);
92	>	assertTrue(f.isCancelled());
93	>
94	>	try {
95	>	f.get();
96	>	shouldThrow();
97	>	} catch (CancellationException success) {
98	>	} catch (Throwable fail) { threadUnexpectedException(fail); }
99	>
100	>	try {
101	>	f.get(5L, SECONDS);
102	>	shouldThrow();
103	>	} catch (CancellationException success) {
104	>	} catch (Throwable fail) { threadUnexpectedException(fail); }
105	>	}
106	>
107	>	void tryToConfuseDoneTask(PublicFutureTask pf) {
108	>	pf.set(new Object());
109	>	pf.setException(new Error());
110	>	for (boolean mayInterruptIfRunning : new boolean[] { true, false }) {
111	>	pf.cancel(true);
112	>	}
113	>	}
114	>
115	>	void checkCompletedAbnormally(Future<?> f, Throwable t) {
116	>	checkIsDone(f);
117	>	assertFalse(f.isCancelled());
118	>
119	>	try {
120	>	f.get();
121	>	shouldThrow();
122	>	} catch (ExecutionException success) {
123	>	assertSame(t, success.getCause());
124	>	} catch (Throwable fail) { threadUnexpectedException(fail); }
125	>
126	>	try {
127	>	f.get(5L, SECONDS);
128	>	shouldThrow();
129	>	} catch (ExecutionException success) {
130	>	assertSame(t, success.getCause());
131	>	} catch (Throwable fail) { threadUnexpectedException(fail); }
132		}
133
134		/**
135		* Subclass to expose protected methods
136		*/
137		static class PublicFutureTask extends FutureTask {
138	<	public PublicFutureTask(Callable r) { super(r); }
139	<	public boolean runAndReset() { return super.runAndReset(); }
140	<	public void set(Object x) { super.set(x); }
141	<	public void setException(Throwable t) { super.setException(t); }
138	>	private final AtomicInteger runCount;
139	>	private final AtomicInteger doneCount = new AtomicInteger(0);
140	>	private final AtomicInteger runAndResetCount = new AtomicInteger(0);
141	>	private final AtomicInteger setCount = new AtomicInteger(0);
142	>	private final AtomicInteger setExceptionCount = new AtomicInteger(0);
143	>	public int runCount() { return runCount.get(); }
144	>	public int doneCount() { return doneCount.get(); }
145	>	public int runAndResetCount() { return runAndResetCount.get(); }
146	>	public int setCount() { return setCount.get(); }
147	>	public int setExceptionCount() { return setExceptionCount.get(); }
148	>
149	>	PublicFutureTask(Runnable runnable) {
150	>	this(runnable, seven);
151	>	}
152	>	PublicFutureTask(Runnable runnable, Object result) {
153	>	this(runnable, result, new AtomicInteger(0));
154	>	}
155	>	private PublicFutureTask(final Runnable runnable, Object result,
156	>	final AtomicInteger runCount) {
157	>	super(new Runnable() {
158	>	public void run() {
159	>	runCount.getAndIncrement();
160	>	runnable.run();
161	>	}}, result);
162	>	this.runCount = runCount;
163	>	}
164	>	PublicFutureTask(Callable callable) {
165	>	this(callable, new AtomicInteger(0));
166	>	}
167	>	private PublicFutureTask(final Callable callable,
168	>	final AtomicInteger runCount) {
169	>	super(new Callable() {
170	>	public Object call() throws Exception {
171	>	runCount.getAndIncrement();
172	>	return callable.call();
173	>	}});
174	>	this.runCount = runCount;
175	>	}
176	>	@Override public void done() {
177	>	assertTrue(isDone());
178	>	doneCount.incrementAndGet();
179	>	super.done();
180	>	}
181	>	@Override public boolean runAndReset() {
182	>	runAndResetCount.incrementAndGet();
183	>	return super.runAndReset();
184	>	}
185	>	@Override public void set(Object x) {
186	>	setCount.incrementAndGet();
187	>	super.set(x);
188	>	}
189	>	@Override public void setException(Throwable t) {
190	>	setExceptionCount.incrementAndGet();
191	>	super.setException(t);
192	>	}
193	>	}
194	>
195	>	class Counter extends CheckedRunnable {
196	>	final AtomicInteger count = new AtomicInteger(0);
197	>	public int get() { return count.get(); }
198	>	public void realRun() {
199	>	count.getAndIncrement();
200	>	}
201		}
202
203		/**
204	<	* Creating a future with a null callable throws NPE
204	>	* creating a future with a null callable throws NullPointerException
205		*/
206		public void testConstructor() {
207		try {
208	<	FutureTask task = new FutureTask(null);
208	>	new FutureTask(null);
209		shouldThrow();
210	<	}
39	<	catch(NullPointerException success) {
40	<	}
210	>	} catch (NullPointerException success) {}
211		}
212
213		/**
214	<	* creating a future with null runnable fails
214	>	* creating a future with null runnable throws NullPointerException
215		*/
216		public void testConstructor2() {
217		try {
218	<	FutureTask task = new FutureTask(null, Boolean.TRUE);
218	>	new FutureTask(null, Boolean.TRUE);
219		shouldThrow();
220	<	}
51	<	catch(NullPointerException success) {
52	<	}
220	>	} catch (NullPointerException success) {}
221		}
222
223		/**
224		* isDone is true when a task completes
225		*/
226		public void testIsDone() {
227	<	FutureTask task = new FutureTask( new NoOpCallable());
228	<	task.run();
229	<	assertTrue(task.isDone());
230	<	assertFalse(task.isCancelled());
227	>	PublicFutureTask task = new PublicFutureTask(new NoOpCallable());
228	>	assertFalse(task.isDone());
229	>	task.run();
230	>	assertTrue(task.isDone());
231	>	checkCompletedNormally(task, Boolean.TRUE);
232	>	assertEquals(1, task.runCount());
233		}
234
235		/**
#	Line 67 | Line 237 | public class FutureTaskTest extends JSR1
237		*/
238		public void testRunAndReset() {
239		PublicFutureTask task = new PublicFutureTask(new NoOpCallable());
240	<	assertTrue(task.runAndReset());
241	<	assertFalse(task.isDone());
240	>	for (int i = 0; i < 3; i++) {
241	>	assertTrue(task.runAndReset());
242	>	checkNotDone(task);
243	>	assertEquals(i+1, task.runCount());
244	>	assertEquals(i+1, task.runAndResetCount());
245	>	assertEquals(0, task.setCount());
246	>	assertEquals(0, task.setExceptionCount());
247	>	}
248		}
249
250		/**
251		* runAndReset after cancellation fails
252		*/
253	<	public void testResetAfterCancel() {
254	<	PublicFutureTask task = new PublicFutureTask(new NoOpCallable());
255	<	assertTrue(task.cancel(false));
256	<	assertFalse(task.runAndReset());
257	<	assertTrue(task.isDone());
258	<	assertTrue(task.isCancelled());
253	>	public void testRunAndResetAfterCancel() {
254	>	for (boolean mayInterruptIfRunning : new boolean[] { true, false }) {
255	>	PublicFutureTask task = new PublicFutureTask(new NoOpCallable());
256	>	assertTrue(task.cancel(mayInterruptIfRunning));
257	>	for (int i = 0; i < 3; i++) {
258	>	assertFalse(task.runAndReset());
259	>	assertEquals(0, task.runCount());
260	>	assertEquals(i+1, task.runAndResetCount());
261	>	assertEquals(0, task.setCount());
262	>	assertEquals(0, task.setExceptionCount());
263	>	}
264	>	tryToConfuseDoneTask(task);
265	>	checkCancelled(task);
266	>	}
267		}
268
85	–
86	–
269		/**
270	<	* setting value gauses get to return it
270	>	* setting value causes get to return it
271		*/
272	<	public void testSet() {
272	>	public void testSet() throws Exception {
273		PublicFutureTask task = new PublicFutureTask(new NoOpCallable());
274		task.set(one);
275	<	try {
276	<	assertEquals(task.get(), one);
277	<	}
278	<	catch(Exception e) {
279	<	unexpectedException();
280	<	}
275	>	for (int i = 0; i < 3; i++) {
276	>	assertSame(one, task.get());
277	>	assertSame(one, task.get(LONG_DELAY_MS, MILLISECONDS));
278	>	assertEquals(1, task.setCount());
279	>	}
280	>	tryToConfuseDoneTask(task);
281	>	checkCompletedNormally(task, one);
282	>	assertEquals(0, task.runCount());
283		}
284
285		/**
286		* setException causes get to throw ExecutionException
287		*/
288	<	public void testSetException() {
288	>	public void testSetException_get() throws Exception {
289		Exception nse = new NoSuchElementException();
290		PublicFutureTask task = new PublicFutureTask(new NoOpCallable());
291		task.setException(nse);
292	+
293		try {
294	<	Object x = task.get();
294	>	task.get();
295		shouldThrow();
296	+	} catch (ExecutionException success) {
297	+	assertSame(nse, success.getCause());
298	+	checkCompletedAbnormally(task, nse);
299		}
300	<	catch(ExecutionException ee) {
301	<	Throwable cause = ee.getCause();
302	<	assertEquals(cause, nse);
303	<	}
304	<	catch(Exception e) {
305	<	unexpectedException();
300	>
301	>	try {
302	>	task.get(LONG_DELAY_MS, MILLISECONDS);
303	>	shouldThrow();
304	>	} catch (ExecutionException success) {
305	>	assertSame(nse, success.getCause());
306	>	checkCompletedAbnormally(task, nse);
307		}
308	+
309	+	assertEquals(1, task.setExceptionCount());
310	+	assertEquals(0, task.setCount());
311	+	tryToConfuseDoneTask(task);
312	+	checkCompletedAbnormally(task, nse);
313	+	assertEquals(0, task.runCount());
314		}
315
316		/**
317	<	*  Cancelling before running succeeds
317	>	* cancel(false) before run succeeds
318		*/
319		public void testCancelBeforeRun() {
320	<	FutureTask task = new FutureTask( new NoOpCallable());
320	>	PublicFutureTask task = new PublicFutureTask(new NoOpCallable());
321		assertTrue(task.cancel(false));
322	<	task.run();
323	<	assertTrue(task.isDone());
324	<	assertTrue(task.isCancelled());
322	>	task.run();
323	>	assertEquals(0, task.runCount());
324	>	assertEquals(0, task.setCount());
325	>	assertEquals(0, task.setExceptionCount());
326	>	assertTrue(task.isCancelled());
327	>	assertTrue(task.isDone());
328	>	tryToConfuseDoneTask(task);
329	>	assertEquals(0, task.runCount());
330	>	checkCancelled(task);
331		}
332
333		/**
334	<	* Cancel(true) before run succeeds
334	>	* cancel(true) before run succeeds
335		*/
336		public void testCancelBeforeRun2() {
337	<	FutureTask task = new FutureTask( new NoOpCallable());
337	>	PublicFutureTask task = new PublicFutureTask(new NoOpCallable());
338		assertTrue(task.cancel(true));
339	<	task.run();
340	<	assertTrue(task.isDone());
341	<	assertTrue(task.isCancelled());
339	>	task.run();
340	>	assertEquals(0, task.runCount());
341	>	assertEquals(0, task.setCount());
342	>	assertEquals(0, task.setExceptionCount());
343	>	assertTrue(task.isCancelled());
344	>	assertTrue(task.isDone());
345	>	tryToConfuseDoneTask(task);
346	>	assertEquals(0, task.runCount());
347	>	checkCancelled(task);
348		}
349
350		/**
351	<	* cancel of a completed task fails
351	>	* cancel(false) of a completed task fails
352		*/
353		public void testCancelAfterRun() {
354	<	FutureTask task = new FutureTask( new NoOpCallable());
355	<	task.run();
354	>	PublicFutureTask task = new PublicFutureTask(new NoOpCallable());
355	>	task.run();
356		assertFalse(task.cancel(false));
357	<	assertTrue(task.isDone());
358	<	assertFalse(task.isCancelled());
357	>	assertEquals(1, task.runCount());
358	>	assertEquals(1, task.setCount());
359	>	assertEquals(0, task.setExceptionCount());
360	>	tryToConfuseDoneTask(task);
361	>	checkCompletedNormally(task, Boolean.TRUE);
362	>	assertEquals(1, task.runCount());
363	>	}
364	>
365	>	/**
366	>	* cancel(true) of a completed task fails
367	>	*/
368	>	public void testCancelAfterRun2() {
369	>	PublicFutureTask task = new PublicFutureTask(new NoOpCallable());
370	>	task.run();
371	>	assertFalse(task.cancel(true));
372	>	assertEquals(1, task.runCount());
373	>	assertEquals(1, task.setCount());
374	>	assertEquals(0, task.setExceptionCount());
375	>	tryToConfuseDoneTask(task);
376	>	checkCompletedNormally(task, Boolean.TRUE);
377	>	assertEquals(1, task.runCount());
378		}
379
380		/**
381	<	* cancel(true) interrupts a running task
381	>	* cancel(true) interrupts a running task that subsequently succeeds
382		*/
383		public void testCancelInterrupt() {
384	<	FutureTask task = new FutureTask( new Callable() {
385	<	public Object call() {
384	>	final CountDownLatch pleaseCancel = new CountDownLatch(1);
385	>	final PublicFutureTask task =
386	>	new PublicFutureTask(new CheckedRunnable() {
387	>	public void realRun() {
388	>	pleaseCancel.countDown();
389		try {
390	<	Thread.sleep(MEDIUM_DELAY_MS);
391	<	threadShouldThrow();
392	<	}
393	<	catch (InterruptedException success) {}
394	<	return Boolean.TRUE;
395	<	} });
396	<	Thread t = new  Thread(task);
390	>	delay(LONG_DELAY_MS);
391	>	shouldThrow();
392	>	} catch (InterruptedException success) {}
393	>	}});
394	>
395	>	Thread t = newStartedThread(task);
396	>	await(pleaseCancel);
397	>	assertTrue(task.cancel(true));
398	>	assertTrue(task.isCancelled());
399	>	assertTrue(task.isDone());
400	>	awaitTermination(t);
401	>	assertEquals(1, task.runCount());
402	>	assertEquals(1, task.setCount());
403	>	assertEquals(0, task.setExceptionCount());
404	>	tryToConfuseDoneTask(task);
405	>	checkCancelled(task);
406	>	}
407	>
408	>	/**
409	>	* cancel(true) tries to interrupt a running task, but
410	>	* Thread.interrupt throws (simulating a restrictive security
411	>	* manager)
412	>	*/
413	>	public void testCancelInterrupt_ThrowsSecurityException() {
414	>	final CountDownLatch pleaseCancel = new CountDownLatch(1);
415	>	final CountDownLatch cancelled = new CountDownLatch(1);
416	>	final PublicFutureTask task =
417	>	new PublicFutureTask(new CheckedRunnable() {
418	>	public void realRun() {
419	>	pleaseCancel.countDown();
420	>	await(cancelled);
421	>	assertFalse(Thread.interrupted());
422	>	}});
423	>
424	>	final Thread t = new Thread(task) {
425	>	// Simulate a restrictive security manager.
426	>	@Override public void interrupt() {
427	>	throw new SecurityException();
428	>	}};
429	>	t.setDaemon(true);
430		t.start();
431	<
431	>
432	>	await(pleaseCancel);
433		try {
434	<	Thread.sleep(SHORT_DELAY_MS);
435	<	assertTrue(task.cancel(true));
436	<	t.join();
437	<	assertTrue(task.isDone());
438	<	assertTrue(task.isCancelled());
439	<	} catch(InterruptedException e){
440	<	unexpectedException();
441	<	}
434	>	task.cancel(true);
435	>	shouldThrow();
436	>	} catch (SecurityException expected) {}
437	>
438	>	// We failed to deliver the interrupt, but the world retains
439	>	// its sanity, as if we had done task.cancel(false)
440	>	assertTrue(task.isCancelled());
441	>	assertTrue(task.isDone());
442	>	assertEquals(1, task.runCount());
443	>	assertEquals(1, task.doneCount());
444	>	assertEquals(0, task.setCount());
445	>	assertEquals(0, task.setExceptionCount());
446	>	cancelled.countDown();
447	>	awaitTermination(t);
448	>	assertEquals(1, task.setCount());
449	>	assertEquals(0, task.setExceptionCount());
450	>	tryToConfuseDoneTask(task);
451	>	checkCancelled(task);
452		}
453
454	+	/**
455	+	* cancel(true) interrupts a running task that subsequently throws
456	+	*/
457	+	public void testCancelInterrupt_taskFails() {
458	+	final CountDownLatch pleaseCancel = new CountDownLatch(1);
459	+	final PublicFutureTask task =
460	+	new PublicFutureTask(new Runnable() {
461	+	public void run() {
462	+	try {
463	+	pleaseCancel.countDown();
464	+	delay(LONG_DELAY_MS);
465	+	} finally { throw new RuntimeException(); }
466	+	}});
467	+
468	+	Thread t = newStartedThread(task);
469	+	await(pleaseCancel);
470	+	assertTrue(task.cancel(true));
471	+	assertTrue(task.isCancelled());
472	+	awaitTermination(t);
473	+	assertEquals(1, task.runCount());
474	+	assertEquals(0, task.setCount());
475	+	assertEquals(1, task.setExceptionCount());
476	+	tryToConfuseDoneTask(task);
477	+	checkCancelled(task);
478	+	}
479
480		/**
481		* cancel(false) does not interrupt a running task
482		*/
483		public void testCancelNoInterrupt() {
484	<	FutureTask task = new FutureTask( new Callable() {
485	<	public Object call() {
486	<	try {
487	<	Thread.sleep(MEDIUM_DELAY_MS);
488	<	}
489	<	catch (InterruptedException success) {
490	<	threadFail("should not interrupt");
491	<	}
484	>	final CountDownLatch pleaseCancel = new CountDownLatch(1);
485	>	final CountDownLatch cancelled = new CountDownLatch(1);
486	>	final PublicFutureTask task =
487	>	new PublicFutureTask(new CheckedCallable<Boolean>() {
488	>	public Boolean realCall() {
489	>	pleaseCancel.countDown();
490	>	await(cancelled);
491	>	assertFalse(Thread.interrupted());
492		return Boolean.TRUE;
493	<	} });
494	<	Thread t = new  Thread(task);
495	<	t.start();
496	<
497	<	try {
498	<	Thread.sleep(SHORT_DELAY_MS);
499	<	assertTrue(task.cancel(false));
500	<	t.join();
501	<	assertTrue(task.isDone());
502	<	assertTrue(task.isCancelled());
503	<	} catch(InterruptedException e){
504	<	unexpectedException();
505	<	}
493	>	}});
494	>
495	>	Thread t = newStartedThread(task);
496	>	await(pleaseCancel);
497	>	assertTrue(task.cancel(false));
498	>	assertTrue(task.isCancelled());
499	>	cancelled.countDown();
500	>	awaitTermination(t);
501	>	assertEquals(1, task.runCount());
502	>	assertEquals(1, task.setCount());
503	>	assertEquals(0, task.setExceptionCount());
504	>	tryToConfuseDoneTask(task);
505	>	checkCancelled(task);
506		}
507
508		/**
509	<	* set in one thread causes get in another thread to retrieve value
510	<	*/
511	<	public void testGet1() {
512	<	final FutureTask ft = new FutureTask(new Callable() {
513	<	public Object call() {
514	<	try {
515	<	Thread.sleep(MEDIUM_DELAY_MS);
516	<	} catch(InterruptedException e){
517	<	threadUnexpectedException();
518	<	}
519	<	return Boolean.TRUE;
520	<	}
521	<	});
522	<	Thread t = new Thread(new Runnable() {
523	<	public void run() {
524	<	try {
525	<	ft.get();
526	<	} catch(Exception e){
527	<	threadUnexpectedException();
528	<	}
529	<	}
530	<	});
531	<	try {
532	<	assertFalse(ft.isDone());
533	<	assertFalse(ft.isCancelled());
534	<	t.start();
535	<	Thread.sleep(SHORT_DELAY_MS);
536	<	ft.run();
537	<	t.join();
538	<	assertTrue(ft.isDone());
539	<	assertFalse(ft.isCancelled());
540	<	} catch(InterruptedException e){
541	<	unexpectedException();
542	<
543	<	}
509	>	* run in one thread causes get in another thread to retrieve value
510	>	*/
511	>	public void testGetRun() {
512	>	final CountDownLatch pleaseRun = new CountDownLatch(2);
513	>
514	>	final PublicFutureTask task =
515	>	new PublicFutureTask(new CheckedCallable<Object>() {
516	>	public Object realCall() {
517	>	return two;
518	>	}});
519	>
520	>	Thread t1 = newStartedThread(new CheckedRunnable() {
521	>	public void realRun() throws Exception {
522	>	pleaseRun.countDown();
523	>	assertSame(two, task.get());
524	>	}});
525	>
526	>	Thread t2 = newStartedThread(new CheckedRunnable() {
527	>	public void realRun() throws Exception {
528	>	pleaseRun.countDown();
529	>	assertSame(two, task.get(2*LONG_DELAY_MS, MILLISECONDS));
530	>	}});
531	>
532	>	await(pleaseRun);
533	>	checkNotDone(task);
534	>	assertTrue(t1.isAlive());
535	>	assertTrue(t2.isAlive());
536	>	task.run();
537	>	checkCompletedNormally(task, two);
538	>	assertEquals(1, task.runCount());
539	>	assertEquals(1, task.setCount());
540	>	assertEquals(0, task.setExceptionCount());
541	>	awaitTermination(t1);
542	>	awaitTermination(t2);
543	>	tryToConfuseDoneTask(task);
544	>	checkCompletedNormally(task, two);
545		}
546
547		/**
548	<	* set in one thread causes timed get in another thread to retrieve value
549	<	*/
550	<	public void testTimedGet1() {
551	<	final FutureTask ft = new FutureTask(new Callable() {
552	<	public Object call() {
553	<	try {
554	<	Thread.sleep(MEDIUM_DELAY_MS);
555	<	} catch(InterruptedException e){
556	<	threadUnexpectedException();
557	<	}
558	<	return Boolean.TRUE;
559	<	}
560	<	});
561	<	Thread t = new Thread(new Runnable() {
562	<	public void run() {
563	<	try {
564	<	ft.get(SHORT_DELAY_MS, TimeUnit.MILLISECONDS);
565	<	} catch(TimeoutException success) {
566	<	} catch(Exception e){
567	<	threadUnexpectedException();
568	<	}
569	<	}
570	<	});
571	<	try {
572	<	assertFalse(ft.isDone());
573	<	assertFalse(ft.isCancelled());
574	<	t.start();
575	<	ft.run();
576	<	t.join();
577	<	assertTrue(ft.isDone());
578	<	assertFalse(ft.isCancelled());
579	<	} catch(InterruptedException e){
580	<	unexpectedException();
581	<
582	<	}
548	>	* set in one thread causes get in another thread to retrieve value
549	>	*/
550	>	public void testGetSet() {
551	>	final CountDownLatch pleaseSet = new CountDownLatch(2);
552	>
553	>	final PublicFutureTask task =
554	>	new PublicFutureTask(new CheckedCallable<Object>() {
555	>	public Object realCall() throws InterruptedException {
556	>	return two;
557	>	}});
558	>
559	>	Thread t1 = newStartedThread(new CheckedRunnable() {
560	>	public void realRun() throws Exception {
561	>	pleaseSet.countDown();
562	>	assertSame(two, task.get());
563	>	}});
564	>
565	>	Thread t2 = newStartedThread(new CheckedRunnable() {
566	>	public void realRun() throws Exception {
567	>	pleaseSet.countDown();
568	>	assertSame(two, task.get(2*LONG_DELAY_MS, MILLISECONDS));
569	>	}});
570	>
571	>	await(pleaseSet);
572	>	checkNotDone(task);
573	>	assertTrue(t1.isAlive());
574	>	assertTrue(t2.isAlive());
575	>	task.set(two);
576	>	assertEquals(0, task.runCount());
577	>	assertEquals(1, task.setCount());
578	>	assertEquals(0, task.setExceptionCount());
579	>	tryToConfuseDoneTask(task);
580	>	checkCompletedNormally(task, two);
581	>	awaitTermination(t1);
582	>	awaitTermination(t2);
583		}
584
585		/**
586	<	*  Cancelling a task causes timed get in another thread to throw CancellationException
586	>	* Cancelling a task causes timed get in another thread to throw
587	>	* CancellationException
588		*/
589		public void testTimedGet_Cancellation() {
590	<	final FutureTask ft = new FutureTask(new Callable() {
591	<	public Object call() {
592	<	try {
593	<	Thread.sleep(SMALL_DELAY_MS);
594	<	threadShouldThrow();
595	<	} catch(InterruptedException e) {
596	<	}
597	<	return Boolean.TRUE;
598	<	}
599	<	});
600	<	try {
601	<	Thread t1 = new Thread(new Runnable() {
602	<	public void run() {
603	<	try {
604	<	ft.get(MEDIUM_DELAY_MS, TimeUnit.MILLISECONDS);
605	<	threadShouldThrow();
606	<	} catch(CancellationException success) {}
607	<	catch(Exception e){
608	<	threadUnexpectedException();
609	<	}
610	<	}
611	<	});
612	<	Thread t2 = new Thread(ft);
613	<	t1.start();
590	>	for (final boolean mayInterruptIfRunning :
591	>	new boolean[] { true, false }) {
592	>	final CountDownLatch pleaseCancel = new CountDownLatch(3);
593	>	final CountDownLatch cancelled = new CountDownLatch(1);
594	>	final PublicFutureTask task =
595	>	new PublicFutureTask(new CheckedCallable<Object>() {
596	>	public Object realCall() throws InterruptedException {
597	>	pleaseCancel.countDown();
598	>	if (mayInterruptIfRunning) {
599	>	try {
600	>	delay(2*LONG_DELAY_MS);
601	>	} catch (InterruptedException success) {}
602	>	} else {
603	>	await(cancelled);
604	>	}
605	>	return two;
606	>	}});
607	>
608	>	Thread t1 = new ThreadShouldThrow(CancellationException.class) {
609	>	public void realRun() throws Exception {
610	>	pleaseCancel.countDown();
611	>	task.get();
612	>	}};
613	>	Thread t2 = new ThreadShouldThrow(CancellationException.class) {
614	>	public void realRun() throws Exception {
615	>	pleaseCancel.countDown();
616	>	task.get(2*LONG_DELAY_MS, MILLISECONDS);
617	>	}};
618	>	t1.start();
619		t2.start();
620	<	Thread.sleep(SHORT_DELAY_MS);
621	<	ft.cancel(true);
622	<	t1.join();
623	<	t2.join();
624	<	} catch(InterruptedException ie){
625	<	unexpectedException();
620	>	Thread t3 = newStartedThread(task);
621	>	await(pleaseCancel);
622	>	checkIsRunning(task);
623	>	task.cancel(mayInterruptIfRunning);
624	>	checkCancelled(task);
625	>	awaitTermination(t1);
626	>	awaitTermination(t2);
627	>	cancelled.countDown();
628	>	awaitTermination(t3);
629	>	assertEquals(1, task.runCount());
630	>	assertEquals(1, task.setCount());
631	>	assertEquals(0, task.setExceptionCount());
632	>	tryToConfuseDoneTask(task);
633	>	checkCancelled(task);
634		}
635		}
636
637		/**
638	<	* Cancelling a task causes get in another thread to throw CancellationException
639	<	*/
640	<	public void testGet_Cancellation() {
641	<	final FutureTask ft = new FutureTask(new Callable() {
642	<	public Object call() {
643	<	try {
644	<	Thread.sleep(MEDIUM_DELAY_MS);
645	<	threadShouldThrow();
646	<	} catch(InterruptedException e){
647	<	}
648	<	return Boolean.TRUE;
649	<	}
650	<	});
651	<	try {
652	<	Thread t1 = new Thread(new Runnable() {
653	<	public void run() {
654	<	try {
655	<	ft.get();
656	<	threadShouldThrow();
657	<	} catch(CancellationException success){
345	<	}
346	<	catch(Exception e){
347	<	threadUnexpectedException();
348	<	}
349	<	}
350	<	});
351	<	Thread t2 = new Thread(ft);
352	<	t1.start();
353	<	t2.start();
354	<	Thread.sleep(SHORT_DELAY_MS);
355	<	ft.cancel(true);
356	<	t1.join();
357	<	t2.join();
358	<	} catch(InterruptedException success){
359	<	unexpectedException();
638	>	* A runtime exception in task causes get to throw ExecutionException
639	>	*/
640	>	public void testGet_ExecutionException() throws InterruptedException {
641	>	final ArithmeticException e = new ArithmeticException();
642	>	final PublicFutureTask task = new PublicFutureTask(new Callable() {
643	>	public Object call() {
644	>	throw e;
645	>	}});
646	>
647	>	task.run();
648	>	assertEquals(1, task.runCount());
649	>	assertEquals(0, task.setCount());
650	>	assertEquals(1, task.setExceptionCount());
651	>	try {
652	>	task.get();
653	>	shouldThrow();
654	>	} catch (ExecutionException success) {
655	>	assertSame(e, success.getCause());
656	>	tryToConfuseDoneTask(task);
657	>	checkCompletedAbnormally(task, success.getCause());
658		}
659		}
362	–
660
661		/**
662	<	* A runtime exception in task causes get to throw ExecutionException
662	>	* A runtime exception in task causes timed get to throw ExecutionException
663		*/
664	<	public void testGet_ExecutionException() {
665	<	final FutureTask ft = new FutureTask(new Callable() {
666	<	public Object call() {
667	<	int i = 5/0;
668	<	return Boolean.TRUE;
669	<	}
670	<	});
671	<	try {
672	<	ft.run();
673	<	ft.get();
674	<	shouldThrow();
675	<	} catch(ExecutionException success){
676	<	}
677	<	catch(Exception e){
678	<	unexpectedException();
382	<	}
383	<	}
384	<
385	<	/**
386	<	*  A runtime exception in task causes timed get to throw ExecutionException
387	<	*/
388	<	public void testTimedGet_ExecutionException2() {
389	<	final FutureTask ft = new FutureTask(new Callable() {
390	<	public Object call() {
391	<	int i = 5/0;
392	<	return Boolean.TRUE;
393	<	}
394	<	});
395	<	try {
396	<	ft.run();
397	<	ft.get(SHORT_DELAY_MS, TimeUnit.MILLISECONDS);
398	<	shouldThrow();
399	<	} catch(ExecutionException success) {
400	<	} catch(TimeoutException success) { } // unlikely but OK
401	<	catch(Exception e){
402	<	unexpectedException();
403	<	}
404	<	}
405	<
406	<
407	<	/**
408	<	* Interrupting a waiting get causes it to throw InterruptedException
409	<	*/
410	<	public void testGet_InterruptedException() {
411	<	final FutureTask ft = new FutureTask(new NoOpCallable());
412	<	Thread t = new Thread(new Runnable() {
413	<	public void run() {
414	<	try {
415	<	ft.get();
416	<	threadShouldThrow();
417	<	} catch(InterruptedException success){
418	<	} catch(Exception e){
419	<	threadUnexpectedException();
420	<	}
421	<	}
422	<	});
423	<	try {
424	<	t.start();
425	<	Thread.sleep(SHORT_DELAY_MS);
426	<	t.interrupt();
427	<	t.join();
428	<	} catch(Exception e){
429	<	unexpectedException();
430	<	}
431	<	}
432	<
433	<	/**
434	<	*  Interrupting a waiting timed get causes it to throw InterruptedException
435	<	*/
436	<	public void testTimedGet_InterruptedException2() {
437	<	final FutureTask ft = new FutureTask(new NoOpCallable());
438	<	Thread t = new Thread(new Runnable() {
439	<	public void run() {
440	<	try {
441	<	ft.get(LONG_DELAY_MS,TimeUnit.MILLISECONDS);
442	<	threadShouldThrow();
443	<	} catch(InterruptedException success){}
444	<	catch(Exception e){
445	<	threadUnexpectedException();
446	<	}
447	<	}
448	<	});
449	<	try {
450	<	t.start();
451	<	Thread.sleep(SHORT_DELAY_MS);
452	<	t.interrupt();
453	<	t.join();
454	<	} catch(Exception e){
455	<	unexpectedException();
664	>	public void testTimedGet_ExecutionException2() throws Exception {
665	>	final ArithmeticException e = new ArithmeticException();
666	>	final PublicFutureTask task = new PublicFutureTask(new Callable() {
667	>	public Object call() {
668	>	throw e;
669	>	}});
670	>
671	>	task.run();
672	>	try {
673	>	task.get(LONG_DELAY_MS, MILLISECONDS);
674	>	shouldThrow();
675	>	} catch (ExecutionException success) {
676	>	assertSame(e, success.getCause());
677	>	tryToConfuseDoneTask(task);
678	>	checkCompletedAbnormally(task, success.getCause());
679		}
680		}
681	<
681	>
682	>	/**
683	>	* get is interruptible
684	>	*/
685	>	public void testGet_interruptible() {
686	>	final CountDownLatch pleaseInterrupt = new CountDownLatch(1);
687	>	final FutureTask task = new FutureTask(new NoOpCallable());
688	>	Thread t = newStartedThread(new CheckedRunnable() {
689	>	public void realRun() throws Exception {
690	>	Thread.currentThread().interrupt();
691	>	try {
692	>	task.get();
693	>	shouldThrow();
694	>	} catch (InterruptedException success) {}
695	>	assertFalse(Thread.interrupted());
696	>
697	>	pleaseInterrupt.countDown();
698	>	try {
699	>	task.get();
700	>	shouldThrow();
701	>	} catch (InterruptedException success) {}
702	>	assertFalse(Thread.interrupted());
703	>	}});
704	>
705	>	await(pleaseInterrupt);
706	>	t.interrupt();
707	>	awaitTermination(t);
708	>	checkNotDone(task);
709	>	}
710	>
711	>	/**
712	>	* timed get is interruptible
713	>	*/
714	>	public void testTimedGet_interruptible() {
715	>	final CountDownLatch pleaseInterrupt = new CountDownLatch(1);
716	>	final FutureTask task = new FutureTask(new NoOpCallable());
717	>	Thread t = newStartedThread(new CheckedRunnable() {
718	>	public void realRun() throws Exception {
719	>	Thread.currentThread().interrupt();
720	>	try {
721	>	task.get(2*LONG_DELAY_MS, MILLISECONDS);
722	>	shouldThrow();
723	>	} catch (InterruptedException success) {}
724	>	assertFalse(Thread.interrupted());
725	>
726	>	pleaseInterrupt.countDown();
727	>	try {
728	>	task.get(2*LONG_DELAY_MS, MILLISECONDS);
729	>	shouldThrow();
730	>	} catch (InterruptedException success) {}
731	>	assertFalse(Thread.interrupted());
732	>	}});
733	>
734	>	await(pleaseInterrupt);
735	>	t.interrupt();
736	>	awaitTermination(t);
737	>	checkNotDone(task);
738	>	}
739	>
740		/**
741		* A timed out timed get throws TimeoutException
742		*/
743	<	public void testGet_TimeoutException() {
744	<	try {
745	<	FutureTask ft = new FutureTask(new NoOpCallable());
746	<	ft.get(1,TimeUnit.MILLISECONDS);
747	<	shouldThrow();
748	<	} catch(TimeoutException success){}
749	<	catch(Exception success){
750	<	unexpectedException();
751	<	}
743	>	public void testGet_TimeoutException() throws Exception {
744	>	FutureTask task = new FutureTask(new NoOpCallable());
745	>	long startTime = System.nanoTime();
746	>	try {
747	>	task.get(timeoutMillis(), MILLISECONDS);
748	>	shouldThrow();
749	>	} catch (TimeoutException success) {
750	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis());
751	>	}
752		}
753	<
753	>
754	>	/**
755	>	* timed get with null TimeUnit throws NullPointerException
756	>	*/
757	>	public void testGet_NullTimeUnit() throws Exception {
758	>	FutureTask task = new FutureTask(new NoOpCallable());
759	>	long[] timeouts = { Long.MIN_VALUE, 0L, Long.MAX_VALUE };
760	>
761	>	for (long timeout : timeouts) {
762	>	try {
763	>	task.get(timeout, null);
764	>	shouldThrow();
765	>	} catch (NullPointerException success) {}
766	>	}
767	>
768	>	task.run();
769	>
770	>	for (long timeout : timeouts) {
771	>	try {
772	>	task.get(timeout, null);
773	>	shouldThrow();
774	>	} catch (NullPointerException success) {}
775	>	}
776	>	}
777	>
778		}

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