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

Comparing jsr166/src/test/tck/FutureTaskTest.java (file contents):
Revision 1.5 by dl, Sat Sep 20 18:20:07 2003 UTC vs.
Revision 1.32 by jsr166, Sun Dec 16 18:52:27 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	<	/**
33	<	* Subclass to expose protected methods
34	<	*/
35	<	static class MyFutureTask extends FutureTask {
36	<	public MyFutureTask(Callable r) { super(r); }
37	<	public boolean reset() { return super.reset(); }
38	<	public void setCancelled() { super.setCancelled(); }
39	<	public void setDone() { super.setDone(); }
40	<	public void set(Object x) { super.set(x); }
41	<	public void setException(Throwable t) { super.setException(t); }
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	<	/**
56	<	*
57	<	*/
58	<	public void testConstructor() {
59	<	try {
60	<	FutureTask task = new FutureTask(null);
61	<	shouldThrow();
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	<	catch(NullPointerException success) {
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	<	/**
79	<	*
80	<	*/
81	<	public void testConstructor2() {
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	<	FutureTask task = new FutureTask(null, Boolean.TRUE);
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	<	catch(NullPointerException success) {
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	>	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	<	*
204	>	* creating a future with a null callable throws NullPointerException
205		*/
206	<	public void testIsDone() {
207	<	FutureTask task = new FutureTask( new NoOpCallable());
208	<	task.run();
209	<	assertTrue(task.isDone());
210	<	assertFalse(task.isCancelled());
206	>	public void testConstructor() {
207	>	try {
208	>	new FutureTask(null);
209	>	shouldThrow();
210	>	} catch (NullPointerException success) {}
211		}
212
213		/**
214	<	*
214	>	* creating a future with null runnable throws NullPointerException
215		*/
216	<	public void testReset() {
217	<	MyFutureTask task = new MyFutureTask(new NoOpCallable());
218	<	task.run();
219	<	assertTrue(task.isDone());
220	<	assertTrue(task.reset());
216	>	public void testConstructor2() {
217	>	try {
218	>	new FutureTask(null, Boolean.TRUE);
219	>	shouldThrow();
220	>	} catch (NullPointerException success) {}
221		}
222
223		/**
224	<	*
224	>	* isDone is true when a task completes
225		*/
226	<	public void testResetAfterCancel() {
227	<	MyFutureTask task = new MyFutureTask(new NoOpCallable());
228	<	assertTrue(task.cancel(false));
229	<	task.run();
230	<	assertTrue(task.isDone());
231	<	assertTrue(task.isCancelled());
232	<	assertFalse(task.reset());
226	>	public void testIsDone() {
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		/**
236	<	*
236	>	* runAndReset of a non-cancelled task succeeds
237		*/
238	<	public void testSetDone() {
239	<	MyFutureTask task = new MyFutureTask(new NoOpCallable());
240	<	task.setDone();
241	<	assertTrue(task.isDone());
242	<	assertFalse(task.isCancelled());
238	>	public void testRunAndReset() {
239	>	PublicFutureTask task = new PublicFutureTask(new NoOpCallable());
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	<	*
251	>	* runAndReset after cancellation fails
252		*/
253	<	public void testSetCancelled() {
254	<	MyFutureTask task = new MyFutureTask(new NoOpCallable());
255	<	assertTrue(task.cancel(false));
256	<	task.setCancelled();
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
269		/**
270	<	*
270	>	* setting value causes get to return it
271		*/
272	<	public void testSet() {
273	<	MyFutureTask task = new MyFutureTask(new NoOpCallable());
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) {
120	<	unexpectedException();
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	<	*
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	<	MyFutureTask task = new MyFutureTask(new NoOpCallable());
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	<	*
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	<	*
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	<	*
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	<	*
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 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);
397	<	t.start();
398	<
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) interrupts a running task that subsequently
410	>	* succeeds, with a security manager that does not permit
411	>	* Thread.interrupt
412	>	*/
413	>	public void testCancelInterrupt_ThrowsSecurityException() {
414	>	if (System.getSecurityManager() != null)
415	>	return;
416	>
417	>	final CountDownLatch pleaseCancel = new CountDownLatch(1);
418	>	final CountDownLatch cancelled = new CountDownLatch(1);
419	>	final PublicFutureTask task =
420	>	new PublicFutureTask(new CheckedRunnable() {
421	>	public void realRun() {
422	>	pleaseCancel.countDown();
423	>	await(cancelled);
424	>	assertFalse(Thread.interrupted());
425	>	}});
426	>
427	>	final Thread t = newStartedThread(task);
428	>	await(pleaseCancel);
429	>	System.setSecurityManager(new SecurityManager() {
430	>	public void checkAccess(Thread t) { throw new SecurityException(); }
431	>	public void checkPermission(Permission p) {}});
432		try {
433	<	Thread.sleep(SHORT_DELAY_MS);
434	<	assertTrue(task.cancel(true));
435	<	t.join();
436	<	assertTrue(task.isDone());
437	<	assertTrue(task.isCancelled());
438	<	} catch(InterruptedException e){
439	<	unexpectedException();
440	<	}
433	>	try {
434	>	task.cancel(true);
435	>	shouldThrow();
436	>	}
437	>	catch (SecurityException expected) {}
438	>	} finally {
439	>	System.setSecurityManager(null);
440	>	}
441	>	assertTrue(task.isCancelled());
442	>	assertTrue(task.isDone());
443	>	assertEquals(1, task.runCount());
444	>	assertEquals(1, task.doneCount());
445	>	assertEquals(0, task.setCount());
446	>	assertEquals(0, task.setExceptionCount());
447	>	cancelled.countDown();
448	>	awaitTermination(t);
449	>	assertEquals(1, task.setCount());
450	>	assertEquals(0, task.setExceptionCount());
451	>	tryToConfuseDoneTask(task);
452	>	checkCancelled(task);
453		}
454
455	+	/**
456	+	* cancel(true) interrupts a running task that subsequently throws
457	+	*/
458	+	public void testCancelInterrupt_taskFails() {
459	+	final CountDownLatch pleaseCancel = new CountDownLatch(1);
460	+	final PublicFutureTask task =
461	+	new PublicFutureTask(new Runnable() {
462	+	public void run() {
463	+	try {
464	+	pleaseCancel.countDown();
465	+	delay(LONG_DELAY_MS);
466	+	} finally { throw new RuntimeException(); }
467	+	}});
468	+
469	+	Thread t = newStartedThread(task);
470	+	await(pleaseCancel);
471	+	assertTrue(task.cancel(true));
472	+	assertTrue(task.isCancelled());
473	+	awaitTermination(t);
474	+	assertEquals(1, task.runCount());
475	+	assertEquals(0, task.setCount());
476	+	assertEquals(1, task.setExceptionCount());
477	+	tryToConfuseDoneTask(task);
478	+	checkCancelled(task);
479	+	}
480
481		/**
482	<	*
482	>	* cancel(false) does not interrupt a running task
483		*/
484		public void testCancelNoInterrupt() {
485	<	FutureTask task = new FutureTask( new Callable() {
486	<	public Object call() {
487	<	try {
488	<	Thread.sleep(MEDIUM_DELAY_MS);
489	<	}
490	<	catch (InterruptedException success) {
491	<	threadFail("should not interrupt");
492	<	}
485	>	final CountDownLatch pleaseCancel = new CountDownLatch(1);
486	>	final CountDownLatch cancelled = new CountDownLatch(1);
487	>	final PublicFutureTask task =
488	>	new PublicFutureTask(new CheckedCallable<Boolean>() {
489	>	public Boolean realCall() {
490	>	pleaseCancel.countDown();
491	>	await(cancelled);
492	>	assertFalse(Thread.interrupted());
493		return Boolean.TRUE;
494	<	} });
495	<	Thread t = new  Thread(task);
496	<	t.start();
497	<
498	<	try {
499	<	Thread.sleep(SHORT_DELAY_MS);
500	<	assertTrue(task.cancel(false));
501	<	t.join();
502	<	assertTrue(task.isDone());
503	<	assertTrue(task.isCancelled());
504	<	} catch(InterruptedException e){
505	<	unexpectedException();
494	>	}});
495	>
496	>	Thread t = newStartedThread(task);
497	>	await(pleaseCancel);
498	>	assertTrue(task.cancel(false));
499	>	assertTrue(task.isCancelled());
500	>	cancelled.countDown();
501	>	awaitTermination(t);
502	>	assertEquals(1, task.runCount());
503	>	assertEquals(1, task.setCount());
504	>	assertEquals(0, task.setExceptionCount());
505	>	tryToConfuseDoneTask(task);
506	>	checkCancelled(task);
507	>	}
508	>
509	>	/**
510	>	* run in one thread causes get in another thread to retrieve value
511	>	*/
512	>	public void testGetRun() {
513	>	final CountDownLatch pleaseRun = new CountDownLatch(2);
514	>
515	>	final PublicFutureTask task =
516	>	new PublicFutureTask(new CheckedCallable<Object>() {
517	>	public Object realCall() {
518	>	return two;
519	>	}});
520	>
521	>	Thread t1 = newStartedThread(new CheckedRunnable() {
522	>	public void realRun() throws Exception {
523	>	pleaseRun.countDown();
524	>	assertSame(two, task.get());
525	>	}});
526	>
527	>	Thread t2 = newStartedThread(new CheckedRunnable() {
528	>	public void realRun() throws Exception {
529	>	pleaseRun.countDown();
530	>	assertSame(two, task.get(2*LONG_DELAY_MS, MILLISECONDS));
531	>	}});
532	>
533	>	await(pleaseRun);
534	>	checkNotDone(task);
535	>	assertTrue(t1.isAlive());
536	>	assertTrue(t2.isAlive());
537	>	task.run();
538	>	checkCompletedNormally(task, two);
539	>	assertEquals(1, task.runCount());
540	>	assertEquals(1, task.setCount());
541	>	assertEquals(0, task.setExceptionCount());
542	>	awaitTermination(t1);
543	>	awaitTermination(t2);
544	>	tryToConfuseDoneTask(task);
545	>	checkCompletedNormally(task, two);
546	>	}
547	>
548	>	/**
549	>	* set in one thread causes get in another thread to retrieve value
550	>	*/
551	>	public void testGetSet() {
552	>	final CountDownLatch pleaseSet = new CountDownLatch(2);
553	>
554	>	final PublicFutureTask task =
555	>	new PublicFutureTask(new CheckedCallable<Object>() {
556	>	public Object realCall() throws InterruptedException {
557	>	return two;
558	>	}});
559	>
560	>	Thread t1 = newStartedThread(new CheckedRunnable() {
561	>	public void realRun() throws Exception {
562	>	pleaseSet.countDown();
563	>	assertSame(two, task.get());
564	>	}});
565	>
566	>	Thread t2 = newStartedThread(new CheckedRunnable() {
567	>	public void realRun() throws Exception {
568	>	pleaseSet.countDown();
569	>	assertSame(two, task.get(2*LONG_DELAY_MS, MILLISECONDS));
570	>	}});
571	>
572	>	await(pleaseSet);
573	>	checkNotDone(task);
574	>	assertTrue(t1.isAlive());
575	>	assertTrue(t2.isAlive());
576	>	task.set(two);
577	>	assertEquals(0, task.runCount());
578	>	assertEquals(1, task.setCount());
579	>	assertEquals(0, task.setExceptionCount());
580	>	tryToConfuseDoneTask(task);
581	>	checkCompletedNormally(task, two);
582	>	awaitTermination(t1);
583	>	awaitTermination(t2);
584	>	}
585	>
586	>	/**
587	>	* Cancelling a task causes timed get in another thread to throw
588	>	* CancellationException
589	>	*/
590	>	public void testTimedGet_Cancellation() {
591	>	for (final boolean mayInterruptIfRunning :
592	>	new boolean[] { true, false }) {
593	>	final CountDownLatch pleaseCancel = new CountDownLatch(3);
594	>	final CountDownLatch cancelled = new CountDownLatch(1);
595	>	final PublicFutureTask task =
596	>	new PublicFutureTask(new CheckedCallable<Object>() {
597	>	public Object realCall() throws InterruptedException {
598	>	pleaseCancel.countDown();
599	>	if (mayInterruptIfRunning) {
600	>	try {
601	>	delay(2*LONG_DELAY_MS);
602	>	} catch (InterruptedException success) {}
603	>	} else {
604	>	await(cancelled);
605	>	}
606	>	return two;
607	>	}});
608	>
609	>	Thread t1 = new ThreadShouldThrow(CancellationException.class) {
610	>	public void realRun() throws Exception {
611	>	pleaseCancel.countDown();
612	>	task.get();
613	>	}};
614	>	Thread t2 = new ThreadShouldThrow(CancellationException.class) {
615	>	public void realRun() throws Exception {
616	>	pleaseCancel.countDown();
617	>	task.get(2*LONG_DELAY_MS, MILLISECONDS);
618	>	}};
619	>	t1.start();
620	>	t2.start();
621	>	Thread t3 = newStartedThread(task);
622	>	await(pleaseCancel);
623	>	checkIsRunning(task);
624	>	task.cancel(mayInterruptIfRunning);
625	>	checkCancelled(task);
626	>	awaitTermination(t1);
627	>	awaitTermination(t2);
628	>	cancelled.countDown();
629	>	awaitTermination(t3);
630	>	assertEquals(1, task.runCount());
631	>	assertEquals(1, task.setCount());
632	>	assertEquals(0, task.setExceptionCount());
633	>	tryToConfuseDoneTask(task);
634	>	checkCancelled(task);
635		}
636		}
637
638		/**
639	<	*
640	<	*/
641	<	public void testGet1() {
642	<	final FutureTask ft = new FutureTask(new Callable() {
643	<	public Object call() {
644	<	try {
645	<	Thread.sleep(MEDIUM_DELAY_MS);
646	<	} catch(InterruptedException e){
647	<	threadUnexpectedException();
648	<	}
649	<	return Boolean.TRUE;
650	<	}
651	<	});
652	<	Thread t = new Thread(new Runnable() {
653	<	public void run() {
654	<	try {
655	<	ft.get();
656	<	} catch(Exception e){
657	<	threadUnexpectedException();
658	<	}
659	<	}
255	<	});
256	<	try {
257	<	assertFalse(ft.isDone());
258	<	assertFalse(ft.isCancelled());
259	<	t.start();
260	<	Thread.sleep(SHORT_DELAY_MS);
261	<	ft.run();
262	<	t.join();
263	<	assertTrue(ft.isDone());
264	<	assertFalse(ft.isCancelled());
265	<	} catch(InterruptedException e){
266	<	unexpectedException();
267	<
268	<	}
639	>	* A runtime exception in task causes get to throw ExecutionException
640	>	*/
641	>	public void testGet_ExecutionException() throws InterruptedException {
642	>	final ArithmeticException e = new ArithmeticException();
643	>	final PublicFutureTask task = new PublicFutureTask(new Callable() {
644	>	public Object call() {
645	>	throw e;
646	>	}});
647	>
648	>	task.run();
649	>	assertEquals(1, task.runCount());
650	>	assertEquals(0, task.setCount());
651	>	assertEquals(1, task.setExceptionCount());
652	>	try {
653	>	task.get();
654	>	shouldThrow();
655	>	} catch (ExecutionException success) {
656	>	assertSame(e, success.getCause());
657	>	tryToConfuseDoneTask(task);
658	>	checkCompletedAbnormally(task, success.getCause());
659	>	}
660		}
661
662		/**
663	<	*
664	<	*/
665	<	public void testTimedGet1() {
666	<	final FutureTask ft = new FutureTask(new Callable() {
667	<	public Object call() {
668	<	try {
669	<	Thread.sleep(MEDIUM_DELAY_MS);
670	<	} catch(InterruptedException e){
280	<	threadUnexpectedException();
281	<	}
282	<	return Boolean.TRUE;
283	<	}
284	<	});
285	<	Thread t = new Thread(new Runnable() {
286	<	public void run() {
287	<	try {
288	<	ft.get(SHORT_DELAY_MS, TimeUnit.MILLISECONDS);
289	<	} catch(TimeoutException success) {
290	<	} catch(Exception e){
291	<	threadUnexpectedException();
292	<	}
293	<	}
294	<	});
295	<	try {
296	<	assertFalse(ft.isDone());
297	<	assertFalse(ft.isCancelled());
298	<	t.start();
299	<	ft.run();
300	<	t.join();
301	<	assertTrue(ft.isDone());
302	<	assertFalse(ft.isCancelled());
303	<	} catch(InterruptedException e){
304	<	unexpectedException();
305	<
306	<	}
307	<	}
663	>	* A runtime exception in task causes timed get to throw ExecutionException
664	>	*/
665	>	public void testTimedGet_ExecutionException2() throws Exception {
666	>	final ArithmeticException e = new ArithmeticException();
667	>	final PublicFutureTask task = new PublicFutureTask(new Callable() {
668	>	public Object call() {
669	>	throw e;
670	>	}});
671
672	+	task.run();
673	+	try {
674	+	task.get(LONG_DELAY_MS, MILLISECONDS);
675	+	shouldThrow();
676	+	} catch (ExecutionException success) {
677	+	assertSame(e, success.getCause());
678	+	tryToConfuseDoneTask(task);
679	+	checkCompletedAbnormally(task, success.getCause());
680	+	}
681	+	}
682	+
683	+	/**
684	+	* get is interruptible
685	+	*/
686	+	public void testGet_interruptible() {
687	+	final CountDownLatch pleaseInterrupt = new CountDownLatch(1);
688	+	final FutureTask task = new FutureTask(new NoOpCallable());
689	+	Thread t = newStartedThread(new CheckedRunnable() {
690	+	public void realRun() throws Exception {
691	+	Thread.currentThread().interrupt();
692	+	try {
693	+	task.get();
694	+	shouldThrow();
695	+	} catch (InterruptedException success) {}
696	+	assertFalse(Thread.interrupted());
697	+
698	+	pleaseInterrupt.countDown();
699	+	try {
700	+	task.get();
701	+	shouldThrow();
702	+	} catch (InterruptedException success) {}
703	+	assertFalse(Thread.interrupted());
704	+	}});
705	+
706	+	await(pleaseInterrupt);
707	+	t.interrupt();
708	+	awaitTermination(t);
709	+	checkNotDone(task);
710	+	}
711	+
712	+	/**
713	+	* timed get is interruptible
714	+	*/
715	+	public void testTimedGet_interruptible() {
716	+	final CountDownLatch pleaseInterrupt = new CountDownLatch(1);
717	+	final FutureTask task = new FutureTask(new NoOpCallable());
718	+	Thread t = newStartedThread(new CheckedRunnable() {
719	+	public void realRun() throws Exception {
720	+	Thread.currentThread().interrupt();
721	+	try {
722	+	task.get(2*LONG_DELAY_MS, MILLISECONDS);
723	+	shouldThrow();
724	+	} catch (InterruptedException success) {}
725	+	assertFalse(Thread.interrupted());
726	+
727	+	pleaseInterrupt.countDown();
728	+	try {
729	+	task.get(2*LONG_DELAY_MS, MILLISECONDS);
730	+	shouldThrow();
731	+	} catch (InterruptedException success) {}
732	+	assertFalse(Thread.interrupted());
733	+	}});
734	+
735	+	await(pleaseInterrupt);
736	+	t.interrupt();
737	+	awaitTermination(t);
738	+	checkNotDone(task);
739	+	}
740	+
741	+	/**
742	+	* A timed out timed get throws TimeoutException
743	+	*/
744	+	public void testGet_TimeoutException() throws Exception {
745	+	FutureTask task = new FutureTask(new NoOpCallable());
746	+	long startTime = System.nanoTime();
747	+	try {
748	+	task.get(timeoutMillis(), MILLISECONDS);
749	+	shouldThrow();
750	+	} catch (TimeoutException success) {
751	+	assertTrue(millisElapsedSince(startTime) >= timeoutMillis());
752	+	}
753	+	}
754
755		/**
756	<	*
757	<	*/
758	<	public void testGet_Cancellation() {
759	<	final FutureTask ft = new FutureTask(new Callable() {
760	<	public Object call() {
761	<	try {
762	<	Thread.sleep(MEDIUM_DELAY_MS);
763	<	} catch(InterruptedException e){
764	<	threadUnexpectedException();
765	<	}
766	<	return Boolean.TRUE;
767	<	}
768	<	});
769	<	try {
770	<	Thread.sleep(SHORT_DELAY_MS);
771	<	Thread t = new Thread(new Runnable() {
772	<	public void run() {
773	<	try {
774	<	ft.get();
775	<	threadShouldThrow();
776	<	} catch(CancellationException success){
332	<	}
333	<	catch(Exception e){
334	<	threadUnexpectedException();
335	<	}
336	<	}
337	<	});
338	<	t.start();
339	<	ft.cancel(true);
340	<	t.join();
341	<	} catch(InterruptedException success){
342	<	unexpectedException();
343	<	}
344	<	}
345	<
346	<	/**
347	<	*
348	<	*/
349	<	public void testGet_Cancellation2() {
350	<	final FutureTask ft = new FutureTask(new Callable() {
351	<	public Object call() {
352	<	try {
353	<	Thread.sleep(SHORT_DELAY_MS);
354	<	} catch(InterruptedException e) {
355	<	threadUnexpectedException();
356	<	}
357	<	return Boolean.TRUE;
358	<	}
359	<	});
360	<	try {
361	<	Thread.sleep(SHORT_DELAY_MS);
362	<	Thread t = new Thread(new Runnable() {
363	<	public void run() {
364	<	try {
365	<	ft.get(MEDIUM_DELAY_MS, TimeUnit.MILLISECONDS);
366	<	threadShouldThrow();
367	<	} catch(CancellationException success) {}
368	<	catch(Exception e){
369	<	threadUnexpectedException();
370	<	}
371	<	}
372	<	});
373	<	t.start();
374	<	Thread.sleep(SHORT_DELAY_MS);
375	<	ft.cancel(true);
376	<	Thread.sleep(SHORT_DELAY_MS);
377	<	t.join();
378	<	} catch(InterruptedException ie){
379	<	unexpectedException();
380	<	}
381	<	}
382	<
383	<	/**
384	<	*
385	<	*/
386	<	public void testGet_ExecutionException() {
387	<	final FutureTask ft = new FutureTask(new Callable() {
388	<	public Object call() {
389	<	int i = 5/0;
390	<	return Boolean.TRUE;
391	<	}
392	<	});
393	<	try {
394	<	ft.run();
395	<	ft.get();
396	<	shouldThrow();
397	<	} catch(ExecutionException success){
398	<	}
399	<	catch(Exception e){
400	<	unexpectedException();
401	<	}
402	<	}
403	<
404	<	/**
405	<	*
406	<	*/
407	<	public void testTimedGet_ExecutionException2() {
408	<	final FutureTask ft = new FutureTask(new Callable() {
409	<	public Object call() {
410	<	int i = 5/0;
411	<	return Boolean.TRUE;
412	<	}
413	<	});
414	<	try {
415	<	ft.run();
416	<	ft.get(SHORT_DELAY_MS, TimeUnit.MILLISECONDS);
417	<	shouldThrow();
418	<	} catch(ExecutionException success) {
419	<	} catch(TimeoutException success) { } // unlikely but OK
420	<	catch(Exception e){
421	<	unexpectedException();
422	<	}
423	<	}
424	<
425	<
426	<	/**
427	<	*
428	<	*/
429	<	public void testGet_InterruptedException() {
430	<	final FutureTask ft = new FutureTask(new NoOpCallable());
431	<	Thread t = new Thread(new Runnable() {
432	<	public void run() {
433	<	try {
434	<	ft.get();
435	<	threadShouldThrow();
436	<	} catch(InterruptedException success){
437	<	} catch(Exception e){
438	<	threadUnexpectedException();
439	<	}
440	<	}
441	<	});
442	<	try {
443	<	t.start();
444	<	Thread.sleep(SHORT_DELAY_MS);
445	<	t.interrupt();
446	<	t.join();
447	<	} catch(Exception e){
448	<	unexpectedException();
449	<	}
450	<	}
451	<
452	<	/**
453	<	*
454	<	*/
455	<	public void testTimedGet_InterruptedException2() {
456	<	final FutureTask ft = new FutureTask(new NoOpCallable());
457	<	Thread t = new Thread(new Runnable() {
458	<	public void run() {
459	<	try {
460	<	ft.get(LONG_DELAY_MS,TimeUnit.MILLISECONDS);
461	<	threadShouldThrow();
462	<	} catch(InterruptedException success){}
463	<	catch(Exception e){
464	<	threadUnexpectedException();
465	<	}
466	<	}
467	<	});
468	<	try {
469	<	t.start();
470	<	Thread.sleep(SHORT_DELAY_MS);
471	<	t.interrupt();
472	<	t.join();
473	<	} catch(Exception e){
474	<	unexpectedException();
475	<	}
476	<	}
477	<
478	<	/**
479	<	*
480	<	*/
481	<	public void testGet_TimeoutException() {
482	<	try {
483	<	FutureTask ft = new FutureTask(new NoOpCallable());
484	<	ft.get(1,TimeUnit.MILLISECONDS);
485	<	shouldThrow();
486	<	} catch(TimeoutException success){}
487	<	catch(Exception success){
488	<	unexpectedException();
489	<	}
756	>	* timed get with null TimeUnit throws NullPointerException
757	>	*/
758	>	public void testGet_NullTimeUnit() throws Exception {
759	>	FutureTask task = new FutureTask(new NoOpCallable());
760	>	long[] timeouts = { Long.MIN_VALUE, 0L, Long.MAX_VALUE };
761	>
762	>	for (long timeout : timeouts) {
763	>	try {
764	>	task.get(timeout, null);
765	>	shouldThrow();
766	>	} catch (NullPointerException success) {}
767	>	}
768	>
769	>	task.run();
770	>
771	>	for (long timeout : timeouts) {
772	>	try {
773	>	task.get(timeout, null);
774	>	shouldThrow();
775	>	} catch (NullPointerException success) {}
776	>	}
777		}
778	<
778	>
779		}

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