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

Comparing jsr166/src/test/tck/FutureTaskTest.java (file contents):
Revision 1.4 by dl, Sun Sep 14 20:42:40 2003 UTC vs.
Revision 1.38 by jsr166, Wed Jun 19 05:54:45 2013 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.util.concurrent.Callable;
11	>	import java.util.concurrent.CancellationException;
12	>	import java.util.concurrent.CountDownLatch;
13	>	import java.util.concurrent.ExecutionException;
14	>	import java.util.concurrent.Future;
15	>	import java.util.concurrent.FutureTask;
16	>	import java.util.concurrent.TimeoutException;
17	>	import java.util.concurrent.atomic.AtomicInteger;
18	>	import static java.util.concurrent.TimeUnit.MILLISECONDS;
19	>	import static java.util.concurrent.TimeUnit.SECONDS;
20		import java.util.*;
21
22		public class FutureTaskTest extends JSR166TestCase {
23
24		public static void main(String[] args) {
25	<	junit.textui.TestRunner.run (suite());
25	>	junit.textui.TestRunner.run(suite());
26		}
27		public static Test suite() {
28	<	return new TestSuite(FutureTaskTest.class);
28	>	return new TestSuite(FutureTaskTest.class);
29		}
30
31	<	/**
32	<	* Subclass to expose protected methods
33	<	*/
34	<	static class MyFutureTask extends FutureTask {
35	<	public MyFutureTask(Callable r) { super(r); }
36	<	public boolean reset() { return super.reset(); }
37	<	public void setCancelled() { super.setCancelled(); }
38	<	public void setDone() { super.setDone(); }
39	<	public void set(Object x) { super.set(x); }
40	<	public void setException(Throwable t) { super.setException(t); }
31	>	void checkIsDone(Future<?> f) {
32	>	assertTrue(f.isDone());
33	>	assertFalse(f.cancel(false));
34	>	assertFalse(f.cancel(true));
35	>	if (f instanceof PublicFutureTask) {
36	>	PublicFutureTask pf = (PublicFutureTask) f;
37	>	assertEquals(1, pf.doneCount());
38	>	assertFalse(pf.runAndReset());
39	>	assertEquals(1, pf.doneCount());
40	>	Object r = null; Object exInfo = null;
41	>	try {
42	>	r = f.get();
43	>	} catch (CancellationException t) {
44	>	exInfo = CancellationException.class;
45	>	} catch (ExecutionException t) {
46	>	exInfo = t.getCause();
47	>	} catch (Throwable t) {
48	>	threadUnexpectedException(t);
49	>	}
50	>
51	>	// Check that run and runAndReset have no effect.
52	>	int savedRunCount = pf.runCount();
53	>	pf.run();
54	>	pf.runAndReset();
55	>	assertEquals(savedRunCount, pf.runCount());
56	>	try {
57	>	assertSame(r, f.get());
58	>	} catch (CancellationException t) {
59	>	assertSame(exInfo, CancellationException.class);
60	>	} catch (ExecutionException t) {
61	>	assertSame(exInfo, t.getCause());
62	>	} catch (Throwable t) {
63	>	threadUnexpectedException(t);
64	>	}
65	>	assertTrue(f.isDone());
66	>	}
67	>	}
68	>
69	>	void checkNotDone(Future<?> f) {
70	>	assertFalse(f.isDone());
71	>	assertFalse(f.isCancelled());
72	>	if (f instanceof PublicFutureTask) {
73	>	PublicFutureTask pf = (PublicFutureTask) f;
74	>	assertEquals(0, pf.doneCount());
75	>	assertEquals(0, pf.setCount());
76	>	assertEquals(0, pf.setExceptionCount());
77	>	}
78	>	}
79	>
80	>	void checkIsRunning(Future<?> f) {
81	>	checkNotDone(f);
82	>	if (f instanceof FutureTask) {
83	>	FutureTask ft = (FutureTask<?>) f;
84	>	// Check that run methods do nothing
85	>	ft.run();
86	>	if (f instanceof PublicFutureTask) {
87	>	PublicFutureTask pf = (PublicFutureTask) f;
88	>	int savedRunCount = pf.runCount();
89	>	pf.run();
90	>	assertFalse(pf.runAndReset());
91	>	assertEquals(savedRunCount, pf.runCount());
92	>	}
93	>	checkNotDone(f);
94	>	}
95	>	}
96	>
97	>	<T> void checkCompletedNormally(Future<T> f, T expected) {
98	>	checkIsDone(f);
99	>	assertFalse(f.isCancelled());
100	>
101	>	try {
102	>	assertSame(expected, f.get());
103	>	} catch (Throwable fail) { threadUnexpectedException(fail); }
104	>	try {
105	>	assertSame(expected, f.get(5L, SECONDS));
106	>	} catch (Throwable fail) { threadUnexpectedException(fail); }
107		}
108
109	<	public void testConstructor(){
109	>	void checkCancelled(Future<?> f) {
110	>	checkIsDone(f);
111	>	assertTrue(f.isCancelled());
112	>
113		try {
114	<	FutureTask task = new FutureTask(null);
115	<	fail("should throw");
116	<	}
117	<	catch(NullPointerException success) {
114	>	f.get();
115	>	shouldThrow();
116	>	} catch (CancellationException success) {
117	>	} catch (Throwable fail) { threadUnexpectedException(fail); }
118	>
119	>	try {
120	>	f.get(5L, SECONDS);
121	>	shouldThrow();
122	>	} catch (CancellationException success) {
123	>	} catch (Throwable fail) { threadUnexpectedException(fail); }
124	>	}
125	>
126	>	void tryToConfuseDoneTask(PublicFutureTask pf) {
127	>	pf.set(new Object());
128	>	pf.setException(new Error());
129	>	for (boolean mayInterruptIfRunning : new boolean[] { true, false }) {
130	>	pf.cancel(true);
131		}
132		}
133
134	<	public void testConstructor2(){
134	>	void checkCompletedAbnormally(Future<?> f, Throwable t) {
135	>	checkIsDone(f);
136	>	assertFalse(f.isCancelled());
137	>
138		try {
139	<	FutureTask task = new FutureTask(null, Boolean.TRUE);
140	<	fail("should throw");
139	>	f.get();
140	>	shouldThrow();
141	>	} catch (ExecutionException success) {
142	>	assertSame(t, success.getCause());
143	>	} catch (Throwable fail) { threadUnexpectedException(fail); }
144	>
145	>	try {
146	>	f.get(5L, SECONDS);
147	>	shouldThrow();
148	>	} catch (ExecutionException success) {
149	>	assertSame(t, success.getCause());
150	>	} catch (Throwable fail) { threadUnexpectedException(fail); }
151	>	}
152	>
153	>	/**
154	>	* Subclass to expose protected methods
155	>	*/
156	>	static class PublicFutureTask extends FutureTask {
157	>	private final AtomicInteger runCount;
158	>	private final AtomicInteger doneCount = new AtomicInteger(0);
159	>	private final AtomicInteger runAndResetCount = new AtomicInteger(0);
160	>	private final AtomicInteger setCount = new AtomicInteger(0);
161	>	private final AtomicInteger setExceptionCount = new AtomicInteger(0);
162	>	public int runCount() { return runCount.get(); }
163	>	public int doneCount() { return doneCount.get(); }
164	>	public int runAndResetCount() { return runAndResetCount.get(); }
165	>	public int setCount() { return setCount.get(); }
166	>	public int setExceptionCount() { return setExceptionCount.get(); }
167	>
168	>	PublicFutureTask(Runnable runnable) {
169	>	this(runnable, seven);
170	>	}
171	>	PublicFutureTask(Runnable runnable, Object result) {
172	>	this(runnable, result, new AtomicInteger(0));
173	>	}
174	>	private PublicFutureTask(final Runnable runnable, Object result,
175	>	final AtomicInteger runCount) {
176	>	super(new Runnable() {
177	>	public void run() {
178	>	runCount.getAndIncrement();
179	>	runnable.run();
180	>	}}, result);
181	>	this.runCount = runCount;
182	>	}
183	>	PublicFutureTask(Callable callable) {
184	>	this(callable, new AtomicInteger(0));
185	>	}
186	>	private PublicFutureTask(final Callable callable,
187	>	final AtomicInteger runCount) {
188	>	super(new Callable() {
189	>	public Object call() throws Exception {
190	>	runCount.getAndIncrement();
191	>	return callable.call();
192	>	}});
193	>	this.runCount = runCount;
194	>	}
195	>	@Override public void done() {
196	>	assertTrue(isDone());
197	>	doneCount.incrementAndGet();
198	>	super.done();
199	>	}
200	>	@Override public boolean runAndReset() {
201	>	runAndResetCount.incrementAndGet();
202	>	return super.runAndReset();
203	>	}
204	>	@Override public void set(Object x) {
205	>	setCount.incrementAndGet();
206	>	super.set(x);
207	>	}
208	>	@Override public void setException(Throwable t) {
209	>	setExceptionCount.incrementAndGet();
210	>	super.setException(t);
211		}
212	<	catch(NullPointerException success) {
212	>	}
213	>
214	>	class Counter extends CheckedRunnable {
215	>	final AtomicInteger count = new AtomicInteger(0);
216	>	public int get() { return count.get(); }
217	>	public void realRun() {
218	>	count.getAndIncrement();
219		}
220		}
221
222	<	public void testIsDone(){
223	<	FutureTask task = new FutureTask( new NoOpCallable());
224	<	task.run();
225	<	assertTrue(task.isDone());
226	<	assertFalse(task.isCancelled());
222	>	/**
223	>	* creating a future with a null callable throws NullPointerException
224	>	*/
225	>	public void testConstructor() {
226	>	try {
227	>	new FutureTask(null);
228	>	shouldThrow();
229	>	} catch (NullPointerException success) {}
230		}
231
232	<	public void testReset(){
233	<	MyFutureTask task = new MyFutureTask(new NoOpCallable());
234	<	task.run();
235	<	assertTrue(task.isDone());
236	<	assertTrue(task.reset());
232	>	/**
233	>	* creating a future with null runnable throws NullPointerException
234	>	*/
235	>	public void testConstructor2() {
236	>	try {
237	>	new FutureTask(null, Boolean.TRUE);
238	>	shouldThrow();
239	>	} catch (NullPointerException success) {}
240		}
241
242	<	public void testResetAfterCancel() {
243	<	MyFutureTask task = new MyFutureTask(new NoOpCallable());
244	<	assertTrue(task.cancel(false));
245	<	task.run();
246	<	assertTrue(task.isDone());
247	<	assertTrue(task.isCancelled());
248	<	assertFalse(task.reset());
242	>	/**
243	>	* isDone is true when a task completes
244	>	*/
245	>	public void testIsDone() {
246	>	PublicFutureTask task = new PublicFutureTask(new NoOpCallable());
247	>	assertFalse(task.isDone());
248	>	task.run();
249	>	assertTrue(task.isDone());
250	>	checkCompletedNormally(task, Boolean.TRUE);
251	>	assertEquals(1, task.runCount());
252		}
253
254	<	public void testSetDone() {
255	<	MyFutureTask task = new MyFutureTask(new NoOpCallable());
256	<	task.setDone();
257	<	assertTrue(task.isDone());
258	<	assertFalse(task.isCancelled());
254	>	/**
255	>	* runAndReset of a non-cancelled task succeeds
256	>	*/
257	>	public void testRunAndReset() {
258	>	PublicFutureTask task = new PublicFutureTask(new NoOpCallable());
259	>	for (int i = 0; i < 3; i++) {
260	>	assertTrue(task.runAndReset());
261	>	checkNotDone(task);
262	>	assertEquals(i+1, task.runCount());
263	>	assertEquals(i+1, task.runAndResetCount());
264	>	assertEquals(0, task.setCount());
265	>	assertEquals(0, task.setExceptionCount());
266	>	}
267		}
268
269	<	public void testSetCancelled() {
270	<	MyFutureTask task = new MyFutureTask(new NoOpCallable());
271	<	assertTrue(task.cancel(false));
272	<	task.setCancelled();
273	<	assertTrue(task.isDone());
274	<	assertTrue(task.isCancelled());
269	>	/**
270	>	* runAndReset after cancellation fails
271	>	*/
272	>	public void testRunAndResetAfterCancel() {
273	>	for (boolean mayInterruptIfRunning : new boolean[] { true, false }) {
274	>	PublicFutureTask task = new PublicFutureTask(new NoOpCallable());
275	>	assertTrue(task.cancel(mayInterruptIfRunning));
276	>	for (int i = 0; i < 3; i++) {
277	>	assertFalse(task.runAndReset());
278	>	assertEquals(0, task.runCount());
279	>	assertEquals(i+1, task.runAndResetCount());
280	>	assertEquals(0, task.setCount());
281	>	assertEquals(0, task.setExceptionCount());
282	>	}
283	>	tryToConfuseDoneTask(task);
284	>	checkCancelled(task);
285	>	}
286		}
287
288	<	public void testSet() {
289	<	MyFutureTask task = new MyFutureTask(new NoOpCallable());
288	>	/**
289	>	* setting value causes get to return it
290	>	*/
291	>	public void testSet() throws Exception {
292	>	PublicFutureTask task = new PublicFutureTask(new NoOpCallable());
293		task.set(one);
294	<	try {
295	<	assertEquals(task.get(), one);
296	<	}
297	<	catch(Exception e) {
298	<	fail("unexpected exception");
299	<	}
294	>	for (int i = 0; i < 3; i++) {
295	>	assertSame(one, task.get());
296	>	assertSame(one, task.get(LONG_DELAY_MS, MILLISECONDS));
297	>	assertEquals(1, task.setCount());
298	>	}
299	>	tryToConfuseDoneTask(task);
300	>	checkCompletedNormally(task, one);
301	>	assertEquals(0, task.runCount());
302		}
303
304	<	public void testSetException() {
304	>	/**
305	>	* setException causes get to throw ExecutionException
306	>	*/
307	>	public void testSetException_get() throws Exception {
308		Exception nse = new NoSuchElementException();
309	<	MyFutureTask task = new MyFutureTask(new NoOpCallable());
309	>	PublicFutureTask task = new PublicFutureTask(new NoOpCallable());
310		task.setException(nse);
311	+
312		try {
313	<	Object x = task.get();
314	<	fail("should throw");
313	>	task.get();
314	>	shouldThrow();
315	>	} catch (ExecutionException success) {
316	>	assertSame(nse, success.getCause());
317	>	checkCompletedAbnormally(task, nse);
318		}
319	<	catch(ExecutionException ee) {
320	<	Throwable cause = ee.getCause();
321	<	assertEquals(cause, nse);
322	<	}
323	<	catch(Exception e) {
324	<	fail("unexpected exception");
319	>
320	>	try {
321	>	task.get(LONG_DELAY_MS, MILLISECONDS);
322	>	shouldThrow();
323	>	} catch (ExecutionException success) {
324	>	assertSame(nse, success.getCause());
325	>	checkCompletedAbnormally(task, nse);
326		}
327	+
328	+	assertEquals(1, task.setExceptionCount());
329	+	assertEquals(0, task.setCount());
330	+	tryToConfuseDoneTask(task);
331	+	checkCompletedAbnormally(task, nse);
332	+	assertEquals(0, task.runCount());
333		}
334
335	+	/**
336	+	* cancel(false) before run succeeds
337	+	*/
338		public void testCancelBeforeRun() {
339	<	FutureTask task = new FutureTask( new NoOpCallable());
339	>	PublicFutureTask task = new PublicFutureTask(new NoOpCallable());
340		assertTrue(task.cancel(false));
341	<	task.run();
342	<	assertTrue(task.isDone());
343	<	assertTrue(task.isCancelled());
341	>	task.run();
342	>	assertEquals(0, task.runCount());
343	>	assertEquals(0, task.setCount());
344	>	assertEquals(0, task.setExceptionCount());
345	>	assertTrue(task.isCancelled());
346	>	assertTrue(task.isDone());
347	>	tryToConfuseDoneTask(task);
348	>	assertEquals(0, task.runCount());
349	>	checkCancelled(task);
350		}
351
352	+	/**
353	+	* cancel(true) before run succeeds
354	+	*/
355		public void testCancelBeforeRun2() {
356	<	FutureTask task = new FutureTask( new NoOpCallable());
356	>	PublicFutureTask task = new PublicFutureTask(new NoOpCallable());
357		assertTrue(task.cancel(true));
358	<	task.run();
359	<	assertTrue(task.isDone());
360	<	assertTrue(task.isCancelled());
358	>	task.run();
359	>	assertEquals(0, task.runCount());
360	>	assertEquals(0, task.setCount());
361	>	assertEquals(0, task.setExceptionCount());
362	>	assertTrue(task.isCancelled());
363	>	assertTrue(task.isDone());
364	>	tryToConfuseDoneTask(task);
365	>	assertEquals(0, task.runCount());
366	>	checkCancelled(task);
367		}
368
369	+	/**
370	+	* cancel(false) of a completed task fails
371	+	*/
372		public void testCancelAfterRun() {
373	<	FutureTask task = new FutureTask( new NoOpCallable());
374	<	task.run();
373	>	PublicFutureTask task = new PublicFutureTask(new NoOpCallable());
374	>	task.run();
375		assertFalse(task.cancel(false));
376	<	assertTrue(task.isDone());
377	<	assertFalse(task.isCancelled());
376	>	assertEquals(1, task.runCount());
377	>	assertEquals(1, task.setCount());
378	>	assertEquals(0, task.setExceptionCount());
379	>	tryToConfuseDoneTask(task);
380	>	checkCompletedNormally(task, Boolean.TRUE);
381	>	assertEquals(1, task.runCount());
382	>	}
383	>
384	>	/**
385	>	* cancel(true) of a completed task fails
386	>	*/
387	>	public void testCancelAfterRun2() {
388	>	PublicFutureTask task = new PublicFutureTask(new NoOpCallable());
389	>	task.run();
390	>	assertFalse(task.cancel(true));
391	>	assertEquals(1, task.runCount());
392	>	assertEquals(1, task.setCount());
393	>	assertEquals(0, task.setExceptionCount());
394	>	tryToConfuseDoneTask(task);
395	>	checkCompletedNormally(task, Boolean.TRUE);
396	>	assertEquals(1, task.runCount());
397		}
398
399	<	public void testCancelInterrupt(){
400	<	FutureTask task = new FutureTask( new Callable() {
401	<	public Object call() {
399	>	/**
400	>	* cancel(true) interrupts a running task that subsequently succeeds
401	>	*/
402	>	public void testCancelInterrupt() {
403	>	final CountDownLatch pleaseCancel = new CountDownLatch(1);
404	>	final PublicFutureTask task =
405	>	new PublicFutureTask(new CheckedRunnable() {
406	>	public void realRun() {
407	>	pleaseCancel.countDown();
408		try {
409	<	Thread.sleep(MEDIUM_DELAY_MS);
410	<	threadFail("should throw");
411	<	}
412	<	catch (InterruptedException success) {}
413	<	return Boolean.TRUE;
414	<	} });
415	<	Thread t = new  Thread(task);
416	<	t.start();
417	<
418	<	try{
419	<	Thread.sleep(SHORT_DELAY_MS);
420	<	assertTrue(task.cancel(true));
421	<	t.join();
422	<	assertTrue(task.isDone());
423	<	assertTrue(task.isCancelled());
424	<	} catch(InterruptedException e){
161	<	fail("unexpected exception");
162	<	}
409	>	delay(LONG_DELAY_MS);
410	>	shouldThrow();
411	>	} catch (InterruptedException success) {}
412	>	}});
413	>
414	>	Thread t = newStartedThread(task);
415	>	await(pleaseCancel);
416	>	assertTrue(task.cancel(true));
417	>	assertTrue(task.isCancelled());
418	>	assertTrue(task.isDone());
419	>	awaitTermination(t);
420	>	assertEquals(1, task.runCount());
421	>	assertEquals(1, task.setCount());
422	>	assertEquals(0, task.setExceptionCount());
423	>	tryToConfuseDoneTask(task);
424	>	checkCancelled(task);
425		}
426
427	+	/**
428	+	* cancel(true) tries to interrupt a running task, but
429	+	* Thread.interrupt throws (simulating a restrictive security
430	+	* manager)
431	+	*/
432	+	public void testCancelInterrupt_ThrowsSecurityException() {
433	+	final CountDownLatch pleaseCancel = new CountDownLatch(1);
434	+	final CountDownLatch cancelled = new CountDownLatch(1);
435	+	final PublicFutureTask task =
436	+	new PublicFutureTask(new CheckedRunnable() {
437	+	public void realRun() {
438	+	pleaseCancel.countDown();
439	+	await(cancelled);
440	+	assertFalse(Thread.interrupted());
441	+	}});
442	+
443	+	final Thread t = new Thread(task) {
444	+	// Simulate a restrictive security manager.
445	+	@Override public void interrupt() {
446	+	throw new SecurityException();
447	+	}};
448	+	t.setDaemon(true);
449	+	t.start();
450
451	<	public void testCancelNoInterrupt(){
452	<	FutureTask task = new FutureTask( new Callable() {
453	<	public Object call() {
451	>	await(pleaseCancel);
452	>	try {
453	>	task.cancel(true);
454	>	shouldThrow();
455	>	} catch (SecurityException expected) {}
456	>
457	>	// We failed to deliver the interrupt, but the world retains
458	>	// its sanity, as if we had done task.cancel(false)
459	>	assertTrue(task.isCancelled());
460	>	assertTrue(task.isDone());
461	>	assertEquals(1, task.runCount());
462	>	assertEquals(1, task.doneCount());
463	>	assertEquals(0, task.setCount());
464	>	assertEquals(0, task.setExceptionCount());
465	>	cancelled.countDown();
466	>	awaitTermination(t);
467	>	assertEquals(1, task.setCount());
468	>	assertEquals(0, task.setExceptionCount());
469	>	tryToConfuseDoneTask(task);
470	>	checkCancelled(task);
471	>	}
472	>
473	>	/**
474	>	* cancel(true) interrupts a running task that subsequently throws
475	>	*/
476	>	public void testCancelInterrupt_taskFails() {
477	>	final CountDownLatch pleaseCancel = new CountDownLatch(1);
478	>	final PublicFutureTask task =
479	>	new PublicFutureTask(new Runnable() {
480	>	public void run() {
481		try {
482	<	Thread.sleep(MEDIUM_DELAY_MS);
483	<	}
484	<	catch (InterruptedException success) {
485	<	threadFail("should not interrupt");
486	<	}
482	>	pleaseCancel.countDown();
483	>	delay(LONG_DELAY_MS);
484	>	threadShouldThrow();
485	>	} catch (InterruptedException success) {
486	>	} catch (Throwable t) { threadUnexpectedException(t); }
487	>	throw new RuntimeException();
488	>	}});
489	>
490	>	Thread t = newStartedThread(task);
491	>	await(pleaseCancel);
492	>	assertTrue(task.cancel(true));
493	>	assertTrue(task.isCancelled());
494	>	awaitTermination(t);
495	>	assertEquals(1, task.runCount());
496	>	assertEquals(0, task.setCount());
497	>	assertEquals(1, task.setExceptionCount());
498	>	tryToConfuseDoneTask(task);
499	>	checkCancelled(task);
500	>	}
501	>
502	>	/**
503	>	* cancel(false) does not interrupt a running task
504	>	*/
505	>	public void testCancelNoInterrupt() {
506	>	final CountDownLatch pleaseCancel = new CountDownLatch(1);
507	>	final CountDownLatch cancelled = new CountDownLatch(1);
508	>	final PublicFutureTask task =
509	>	new PublicFutureTask(new CheckedCallable<Boolean>() {
510	>	public Boolean realCall() {
511	>	pleaseCancel.countDown();
512	>	await(cancelled);
513	>	assertFalse(Thread.interrupted());
514		return Boolean.TRUE;
515	<	} });
516	<	Thread t = new  Thread(task);
517	<	t.start();
518	<
519	<	try{
520	<	Thread.sleep(SHORT_DELAY_MS);
521	<	assertTrue(task.cancel(false));
522	<	t.join();
523	<	assertTrue(task.isDone());
524	<	assertTrue(task.isCancelled());
525	<	} catch(InterruptedException e){
526	<	fail("unexpected exception");
515	>	}});
516	>
517	>	Thread t = newStartedThread(task);
518	>	await(pleaseCancel);
519	>	assertTrue(task.cancel(false));
520	>	assertTrue(task.isCancelled());
521	>	cancelled.countDown();
522	>	awaitTermination(t);
523	>	assertEquals(1, task.runCount());
524	>	assertEquals(1, task.setCount());
525	>	assertEquals(0, task.setExceptionCount());
526	>	tryToConfuseDoneTask(task);
527	>	checkCancelled(task);
528	>	}
529	>
530	>	/**
531	>	* run in one thread causes get in another thread to retrieve value
532	>	*/
533	>	public void testGetRun() {
534	>	final CountDownLatch pleaseRun = new CountDownLatch(2);
535	>
536	>	final PublicFutureTask task =
537	>	new PublicFutureTask(new CheckedCallable<Object>() {
538	>	public Object realCall() {
539	>	return two;
540	>	}});
541	>
542	>	Thread t1 = newStartedThread(new CheckedRunnable() {
543	>	public void realRun() throws Exception {
544	>	pleaseRun.countDown();
545	>	assertSame(two, task.get());
546	>	}});
547	>
548	>	Thread t2 = newStartedThread(new CheckedRunnable() {
549	>	public void realRun() throws Exception {
550	>	pleaseRun.countDown();
551	>	assertSame(two, task.get(2*LONG_DELAY_MS, MILLISECONDS));
552	>	}});
553	>
554	>	await(pleaseRun);
555	>	checkNotDone(task);
556	>	assertTrue(t1.isAlive());
557	>	assertTrue(t2.isAlive());
558	>	task.run();
559	>	checkCompletedNormally(task, two);
560	>	assertEquals(1, task.runCount());
561	>	assertEquals(1, task.setCount());
562	>	assertEquals(0, task.setExceptionCount());
563	>	awaitTermination(t1);
564	>	awaitTermination(t2);
565	>	tryToConfuseDoneTask(task);
566	>	checkCompletedNormally(task, two);
567	>	}
568	>
569	>	/**
570	>	* set in one thread causes get in another thread to retrieve value
571	>	*/
572	>	public void testGetSet() {
573	>	final CountDownLatch pleaseSet = new CountDownLatch(2);
574	>
575	>	final PublicFutureTask task =
576	>	new PublicFutureTask(new CheckedCallable<Object>() {
577	>	public Object realCall() throws InterruptedException {
578	>	return two;
579	>	}});
580	>
581	>	Thread t1 = newStartedThread(new CheckedRunnable() {
582	>	public void realRun() throws Exception {
583	>	pleaseSet.countDown();
584	>	assertSame(two, task.get());
585	>	}});
586	>
587	>	Thread t2 = newStartedThread(new CheckedRunnable() {
588	>	public void realRun() throws Exception {
589	>	pleaseSet.countDown();
590	>	assertSame(two, task.get(2*LONG_DELAY_MS, MILLISECONDS));
591	>	}});
592	>
593	>	await(pleaseSet);
594	>	checkNotDone(task);
595	>	assertTrue(t1.isAlive());
596	>	assertTrue(t2.isAlive());
597	>	task.set(two);
598	>	assertEquals(0, task.runCount());
599	>	assertEquals(1, task.setCount());
600	>	assertEquals(0, task.setExceptionCount());
601	>	tryToConfuseDoneTask(task);
602	>	checkCompletedNormally(task, two);
603	>	awaitTermination(t1);
604	>	awaitTermination(t2);
605	>	}
606	>
607	>	/**
608	>	* Cancelling a task causes timed get in another thread to throw
609	>	* CancellationException
610	>	*/
611	>	public void testTimedGet_Cancellation() {
612	>	testTimedGet_Cancellation(false);
613	>	}
614	>	public void testTimedGet_Cancellation_interrupt() {
615	>	testTimedGet_Cancellation(true);
616	>	}
617	>	public void testTimedGet_Cancellation(final boolean mayInterruptIfRunning) {
618	>	final CountDownLatch pleaseCancel = new CountDownLatch(3);
619	>	final CountDownLatch cancelled = new CountDownLatch(1);
620	>	final Callable<Object> callable =
621	>	new CheckedCallable<Object>() {
622	>	public Object realCall() throws InterruptedException {
623	>	pleaseCancel.countDown();
624	>	if (mayInterruptIfRunning) {
625	>	try {
626	>	delay(2*LONG_DELAY_MS);
627	>	} catch (InterruptedException success) {}
628	>	} else {
629	>	await(cancelled);
630	>	}
631	>	return two;
632	>	}};
633	>	final PublicFutureTask task = new PublicFutureTask(callable);
634	>
635	>	Thread t1 = new ThreadShouldThrow(CancellationException.class) {
636	>	public void realRun() throws Exception {
637	>	pleaseCancel.countDown();
638	>	task.get();
639	>	}};
640	>	Thread t2 = new ThreadShouldThrow(CancellationException.class) {
641	>	public void realRun() throws Exception {
642	>	pleaseCancel.countDown();
643	>	task.get(2*LONG_DELAY_MS, MILLISECONDS);
644	>	}};
645	>	t1.start();
646	>	t2.start();
647	>	Thread t3 = newStartedThread(task);
648	>	await(pleaseCancel);
649	>	checkIsRunning(task);
650	>	task.cancel(mayInterruptIfRunning);
651	>	checkCancelled(task);
652	>	awaitTermination(t1);
653	>	awaitTermination(t2);
654	>	cancelled.countDown();
655	>	awaitTermination(t3);
656	>	assertEquals(1, task.runCount());
657	>	assertEquals(1, task.setCount());
658	>	assertEquals(0, task.setExceptionCount());
659	>	tryToConfuseDoneTask(task);
660	>	checkCancelled(task);
661	>	}
662	>
663	>	/**
664	>	* A runtime exception in task causes get to throw ExecutionException
665	>	*/
666	>	public void testGet_ExecutionException() throws InterruptedException {
667	>	final ArithmeticException e = new ArithmeticException();
668	>	final PublicFutureTask task = new PublicFutureTask(new Callable() {
669	>	public Object call() {
670	>	throw e;
671	>	}});
672	>
673	>	task.run();
674	>	assertEquals(1, task.runCount());
675	>	assertEquals(0, task.setCount());
676	>	assertEquals(1, task.setExceptionCount());
677	>	try {
678	>	task.get();
679	>	shouldThrow();
680	>	} catch (ExecutionException success) {
681	>	assertSame(e, success.getCause());
682	>	tryToConfuseDoneTask(task);
683	>	checkCompletedAbnormally(task, success.getCause());
684		}
685		}
686
687	<	public void testGet1() {
688	<	final FutureTask ft = new FutureTask(new Callable(){
689	<	public Object call(){
690	<	try{
691	<	Thread.sleep(MEDIUM_DELAY_MS);
692	<	} catch(InterruptedException e){
693	<	threadFail("unexpected exception");
694	<	}
695	<	return Boolean.TRUE;
696	<	}
697	<	});
698	<	Thread t = new Thread(new Runnable(){
699	<	public void run(){
700	<	try{
701	<	ft.get();
702	<	} catch(Exception e){
703	<	threadFail("unexpected exception");
704	<	}
705	<	}
706	<	});
707	<	try{
708	<	assertFalse(ft.isDone());
709	<	assertFalse(ft.isCancelled());
710	<	t.start();
711	<	Thread.sleep(SHORT_DELAY_MS);
712	<	ft.run();
713	<	t.join();
714	<	assertTrue(ft.isDone());
715	<	assertFalse(ft.isCancelled());
716	<	} catch(InterruptedException e){
717	<	fail("unexpected exception");
718	<
719	<	}
720	<	}
721	<
722	<	public void testTimedGet1() {
723	<	final FutureTask ft = new FutureTask(new Callable(){
724	<	public Object call(){
725	<	try{
726	<	Thread.sleep(MEDIUM_DELAY_MS);
727	<	} catch(InterruptedException e){
728	<	threadFail("unexpected exception");
729	<	}
730	<	return Boolean.TRUE;
731	<	}
732	<	});
733	<	Thread t = new Thread(new Runnable(){
734	<	public void run(){
239	<	try{
240	<	ft.get(SHORT_DELAY_MS, TimeUnit.MILLISECONDS);
241	<	} catch(TimeoutException success) {
242	<	} catch(Exception e){
243	<	threadFail("unexpected exception");
244	<	}
245	<	}
246	<	});
247	<	try{
248	<	assertFalse(ft.isDone());
249	<	assertFalse(ft.isCancelled());
250	<	t.start();
251	<	ft.run();
252	<	t.join();
253	<	assertTrue(ft.isDone());
254	<	assertFalse(ft.isCancelled());
255	<	} catch(InterruptedException e){
256	<	fail("unexpected exception");
257	<
258	<	}
687	>	/**
688	>	* A runtime exception in task causes timed get to throw ExecutionException
689	>	*/
690	>	public void testTimedGet_ExecutionException2() throws Exception {
691	>	final ArithmeticException e = new ArithmeticException();
692	>	final PublicFutureTask task = new PublicFutureTask(new Callable() {
693	>	public Object call() {
694	>	throw e;
695	>	}});
696	>
697	>	task.run();
698	>	try {
699	>	task.get(LONG_DELAY_MS, MILLISECONDS);
700	>	shouldThrow();
701	>	} catch (ExecutionException success) {
702	>	assertSame(e, success.getCause());
703	>	tryToConfuseDoneTask(task);
704	>	checkCompletedAbnormally(task, success.getCause());
705	>	}
706	>	}
707	>
708	>	/**
709	>	* get is interruptible
710	>	*/
711	>	public void testGet_interruptible() {
712	>	final CountDownLatch pleaseInterrupt = new CountDownLatch(1);
713	>	final FutureTask task = new FutureTask(new NoOpCallable());
714	>	Thread t = newStartedThread(new CheckedRunnable() {
715	>	public void realRun() throws Exception {
716	>	Thread.currentThread().interrupt();
717	>	try {
718	>	task.get();
719	>	shouldThrow();
720	>	} catch (InterruptedException success) {}
721	>	assertFalse(Thread.interrupted());
722	>
723	>	pleaseInterrupt.countDown();
724	>	try {
725	>	task.get();
726	>	shouldThrow();
727	>	} catch (InterruptedException success) {}
728	>	assertFalse(Thread.interrupted());
729	>	}});
730	>
731	>	await(pleaseInterrupt);
732	>	t.interrupt();
733	>	awaitTermination(t);
734	>	checkNotDone(task);
735		}
736
737	+	/**
738	+	* timed get is interruptible
739	+	*/
740	+	public void testTimedGet_interruptible() {
741	+	final CountDownLatch pleaseInterrupt = new CountDownLatch(1);
742	+	final FutureTask task = new FutureTask(new NoOpCallable());
743	+	Thread t = newStartedThread(new CheckedRunnable() {
744	+	public void realRun() throws Exception {
745	+	Thread.currentThread().interrupt();
746	+	try {
747	+	task.get(2*LONG_DELAY_MS, MILLISECONDS);
748	+	shouldThrow();
749	+	} catch (InterruptedException success) {}
750	+	assertFalse(Thread.interrupted());
751	+
752	+	pleaseInterrupt.countDown();
753	+	try {
754	+	task.get(2*LONG_DELAY_MS, MILLISECONDS);
755	+	shouldThrow();
756	+	} catch (InterruptedException success) {}
757	+	assertFalse(Thread.interrupted());
758	+	}});
759	+
760	+	await(pleaseInterrupt);
761	+	t.interrupt();
762	+	awaitTermination(t);
763	+	checkNotDone(task);
764	+	}
765
766	<	public void testGet_Cancellation(){
767	<	final FutureTask ft = new FutureTask(new Callable(){
768	<	public Object call(){
769	<	try{
770	<	Thread.sleep(MEDIUM_DELAY_MS);
771	<	} catch(InterruptedException e){
772	<	threadFail("unexpected exception");
773	<	}
774	<	return Boolean.TRUE;
775	<	}
776	<	});
777	<	try {
778	<	Thread.sleep(SHORT_DELAY_MS);
779	<	Thread t = new Thread(new Runnable(){
780	<	public void run(){
781	<	try{
782	<	ft.get();
783	<	threadFail("should throw");
784	<	} catch(CancellationException success){
785	<	}
786	<	catch(Exception e){
787	<	threadFail("unexpected exception");
788	<	}
789	<	}
790	<	});
791	<	t.start();
792	<	ft.cancel(true);
793	<	t.join();
794	<	} catch(InterruptedException success){
795	<	fail("unexpected exception");
796	<	}
797	<	}
798	<
799	<	public void testGet_Cancellation2(){
800	<	final FutureTask ft = new FutureTask(new Callable(){
801	<	public Object call(){
298	<	try{
299	<	Thread.sleep(SHORT_DELAY_MS);
300	<	} catch(InterruptedException e) {
301	<	threadFail("unexpected exception");
302	<	}
303	<	return Boolean.TRUE;
304	<	}
305	<	});
306	<	try{
307	<	Thread.sleep(SHORT_DELAY_MS);
308	<	Thread t = new Thread(new Runnable(){
309	<	public void run(){
310	<	try{
311	<	ft.get(MEDIUM_DELAY_MS, TimeUnit.MILLISECONDS);
312	<	threadFail("should throw");
313	<	} catch(CancellationException success) {}
314	<	catch(Exception e){
315	<	threadFail("unexpected exception");
316	<	}
317	<	}
318	<	});
319	<	t.start();
320	<	Thread.sleep(SHORT_DELAY_MS);
321	<	ft.cancel(true);
322	<	Thread.sleep(SHORT_DELAY_MS);
323	<	t.join();
324	<	} catch(InterruptedException ie){
325	<	fail("unexpected exception");
326	<	}
327	<	}
328	<
329	<	public void testGet_ExecutionException(){
330	<	final FutureTask ft = new FutureTask(new Callable(){
331	<	public Object call(){
332	<	int i = 5/0;
333	<	return Boolean.TRUE;
334	<	}
335	<	});
336	<	try{
337	<	ft.run();
338	<	ft.get();
339	<	fail("should throw");
340	<	} catch(ExecutionException success){
341	<	}
342	<	catch(Exception e){
343	<	fail("unexpected exception");
344	<	}
345	<	}
346	<
347	<	public void testTimedGet_ExecutionException2(){
348	<	final FutureTask ft = new FutureTask(new Callable(){
349	<	public Object call(){
350	<	int i = 5/0;
351	<	return Boolean.TRUE;
352	<	}
353	<	});
354	<	try{
355	<	ft.run();
356	<	ft.get(SHORT_DELAY_MS, TimeUnit.MILLISECONDS);
357	<	fail("should throw");
358	<	} catch(ExecutionException success) {
359	<	} catch(TimeoutException success) { } // unlikely but OK
360	<	catch(Exception e){
361	<	fail("unexpected exception");
362	<	}
363	<	}
364	<
365	<
366	<	public void testGet_InterruptedException(){
367	<	final FutureTask ft = new FutureTask(new NoOpCallable());
368	<	Thread t = new Thread(new Runnable(){
369	<	public void run(){
370	<	try{
371	<	ft.get();
372	<	threadFail("should throw");
373	<	} catch(InterruptedException success){
374	<	} catch(Exception e){
375	<	threadFail("unexpected exception");
376	<	}
377	<	}
378	<	});
379	<	try {
380	<	t.start();
381	<	Thread.sleep(SHORT_DELAY_MS);
382	<	t.interrupt();
383	<	t.join();
384	<	} catch(Exception e){
385	<	fail("unexpected exception");
386	<	}
387	<	}
388	<
389	<	public void testTimedGet_InterruptedException2(){
390	<	final FutureTask ft = new FutureTask(new NoOpCallable());
391	<	Thread t = new Thread(new Runnable(){
392	<	public void run(){
393	<	try{
394	<	ft.get(LONG_DELAY_MS,TimeUnit.MILLISECONDS);
395	<	threadFail("should throw");
396	<	} catch(InterruptedException success){}
397	<	catch(Exception e){
398	<	threadFail("unexpected exception");
399	<	}
400	<	}
401	<	});
402	<	try {
403	<	t.start();
404	<	Thread.sleep(SHORT_DELAY_MS);
405	<	t.interrupt();
406	<	t.join();
407	<	} catch(Exception e){
408	<	fail("unexpected exception");
409	<	}
410	<	}
411	<
412	<	public void testGet_TimeoutException(){
413	<	try{
414	<	FutureTask ft = new FutureTask(new NoOpCallable());
415	<	ft.get(1,TimeUnit.MILLISECONDS);
416	<	fail("should throw");
417	<	} catch(TimeoutException success){}
418	<	catch(Exception success){
419	<	fail("unexpected exception");
420	<	}
766	>	/**
767	>	* A timed out timed get throws TimeoutException
768	>	*/
769	>	public void testGet_TimeoutException() throws Exception {
770	>	FutureTask task = new FutureTask(new NoOpCallable());
771	>	long startTime = System.nanoTime();
772	>	try {
773	>	task.get(timeoutMillis(), MILLISECONDS);
774	>	shouldThrow();
775	>	} catch (TimeoutException success) {
776	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis());
777	>	}
778	>	}
779	>
780	>	/**
781	>	* timed get with null TimeUnit throws NullPointerException
782	>	*/
783	>	public void testGet_NullTimeUnit() throws Exception {
784	>	FutureTask task = new FutureTask(new NoOpCallable());
785	>	long[] timeouts = { Long.MIN_VALUE, 0L, Long.MAX_VALUE };
786	>
787	>	for (long timeout : timeouts) {
788	>	try {
789	>	task.get(timeout, null);
790	>	shouldThrow();
791	>	} catch (NullPointerException success) {}
792	>	}
793	>
794	>	task.run();
795	>
796	>	for (long timeout : timeouts) {
797	>	try {
798	>	task.get(timeout, null);
799	>	shouldThrow();
800	>	} catch (NullPointerException success) {}
801	>	}
802		}
803	<
803	>
804		}

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