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

Comparing jsr166/src/test/tck/ScheduledExecutorTest.java (file contents):
Revision 1.1 by dl, Sun Aug 31 19:24:55 2003 UTC vs.
Revision 1.86 by jsr166, Sat Mar 25 21:41:10 2017 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.*;
11	<	import java.util.concurrent.*;
11	<
12	<	public class ScheduledExecutorTest extends TestCase{
13	<
14	<	boolean flag = false;
9	>	import static java.util.concurrent.TimeUnit.MILLISECONDS;
10	>	import static java.util.concurrent.TimeUnit.NANOSECONDS;
11	>	import static java.util.concurrent.TimeUnit.SECONDS;
12
13	+	import java.util.ArrayList;
14	+	import java.util.HashSet;
15	+	import java.util.List;
16	+	import java.util.concurrent.BlockingQueue;
17	+	import java.util.concurrent.Callable;
18	+	import java.util.concurrent.CancellationException;
19	+	import java.util.concurrent.CountDownLatch;
20	+	import java.util.concurrent.ExecutionException;
21	+	import java.util.concurrent.ExecutorService;
22	+	import java.util.concurrent.Future;
23	+	import java.util.concurrent.RejectedExecutionException;
24	+	import java.util.concurrent.ScheduledFuture;
25	+	import java.util.concurrent.ScheduledThreadPoolExecutor;
26	+	import java.util.concurrent.ThreadFactory;
27	+	import java.util.concurrent.ThreadPoolExecutor;
28	+	import java.util.concurrent.atomic.AtomicBoolean;
29	+	import java.util.concurrent.atomic.AtomicInteger;
30	+	import java.util.concurrent.atomic.AtomicLong;
31	+
32	+	import junit.framework.Test;
33	+	import junit.framework.TestSuite;
34	+
35	+	public class ScheduledExecutorTest extends JSR166TestCase {
36		public static void main(String[] args) {
37	<	junit.textui.TestRunner.run (suite());
37	>	main(suite(), args);
38		}
19	–
20	–
39		public static Test suite() {
40	<	return new TestSuite(ScheduledExecutorTest.class);
40	>	return new TestSuite(ScheduledExecutorTest.class);
41	>	}
42	>
43	>	/**
44	>	* execute successfully executes a runnable
45	>	*/
46	>	public void testExecute() throws InterruptedException {
47	>	final ScheduledThreadPoolExecutor p = new ScheduledThreadPoolExecutor(1);
48	>	try (PoolCleaner cleaner = cleaner(p)) {
49	>	final CountDownLatch done = new CountDownLatch(1);
50	>	final Runnable task = new CheckedRunnable() {
51	>	public void realRun() { done.countDown(); }};
52	>	p.execute(task);
53	>	await(done);
54	>	}
55	>	}
56	>
57	>	/**
58	>	* delayed schedule of callable successfully executes after delay
59	>	*/
60	>	public void testSchedule1() throws Exception {
61	>	final ScheduledThreadPoolExecutor p = new ScheduledThreadPoolExecutor(1);
62	>	try (PoolCleaner cleaner = cleaner(p)) {
63	>	final long startTime = System.nanoTime();
64	>	final CountDownLatch done = new CountDownLatch(1);
65	>	Callable task = new CheckedCallable<Boolean>() {
66	>	public Boolean realCall() {
67	>	done.countDown();
68	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis());
69	>	return Boolean.TRUE;
70	>	}};
71	>	Future f = p.schedule(task, timeoutMillis(), MILLISECONDS);
72	>	assertSame(Boolean.TRUE, f.get());
73	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis());
74	>	assertTrue(done.await(0L, MILLISECONDS));
75	>	}
76	>	}
77	>
78	>	/**
79	>	* delayed schedule of runnable successfully executes after delay
80	>	*/
81	>	public void testSchedule3() throws Exception {
82	>	final ScheduledThreadPoolExecutor p = new ScheduledThreadPoolExecutor(1);
83	>	try (PoolCleaner cleaner = cleaner(p)) {
84	>	final long startTime = System.nanoTime();
85	>	final CountDownLatch done = new CountDownLatch(1);
86	>	Runnable task = new CheckedRunnable() {
87	>	public void realRun() {
88	>	done.countDown();
89	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis());
90	>	}};
91	>	Future f = p.schedule(task, timeoutMillis(), MILLISECONDS);
92	>	await(done);
93	>	assertNull(f.get(LONG_DELAY_MS, MILLISECONDS));
94	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis());
95	>	}
96	>	}
97	>
98	>	/**
99	>	* scheduleAtFixedRate executes runnable after given initial delay
100	>	*/
101	>	public void testSchedule4() throws Exception {
102	>	final ScheduledThreadPoolExecutor p = new ScheduledThreadPoolExecutor(1);
103	>	try (PoolCleaner cleaner = cleaner(p)) {
104	>	final long startTime = System.nanoTime();
105	>	final CountDownLatch done = new CountDownLatch(1);
106	>	Runnable task = new CheckedRunnable() {
107	>	public void realRun() {
108	>	done.countDown();
109	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis());
110	>	}};
111	>	ScheduledFuture f =
112	>	p.scheduleAtFixedRate(task, timeoutMillis(),
113	>	LONG_DELAY_MS, MILLISECONDS);
114	>	await(done);
115	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis());
116	>	f.cancel(true);
117	>	}
118	>	}
119	>
120	>	/**
121	>	* scheduleWithFixedDelay executes runnable after given initial delay
122	>	*/
123	>	public void testSchedule5() throws Exception {
124	>	final ScheduledThreadPoolExecutor p = new ScheduledThreadPoolExecutor(1);
125	>	try (PoolCleaner cleaner = cleaner(p)) {
126	>	final long startTime = System.nanoTime();
127	>	final CountDownLatch done = new CountDownLatch(1);
128	>	Runnable task = new CheckedRunnable() {
129	>	public void realRun() {
130	>	done.countDown();
131	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis());
132	>	}};
133	>	ScheduledFuture f =
134	>	p.scheduleWithFixedDelay(task, timeoutMillis(),
135	>	LONG_DELAY_MS, MILLISECONDS);
136	>	await(done);
137	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis());
138	>	f.cancel(true);
139	>	}
140	>	}
141	>
142	>	static class RunnableCounter implements Runnable {
143	>	AtomicInteger count = new AtomicInteger(0);
144	>	public void run() { count.getAndIncrement(); }
145	>	}
146	>
147	>	/**
148	>	* scheduleAtFixedRate executes series of tasks at given rate.
149	>	* Eventually, it must hold that:
150	>	*   cycles - 1 <= elapsedMillis/delay < cycles
151	>	*/
152	>	public void testFixedRateSequence() throws InterruptedException {
153	>	final ScheduledThreadPoolExecutor p = new ScheduledThreadPoolExecutor(1);
154	>	try (PoolCleaner cleaner = cleaner(p)) {
155	>	for (int delay = 1; delay <= LONG_DELAY_MS; delay *= 3) {
156	>	final long startTime = System.nanoTime();
157	>	final int cycles = 8;
158	>	final CountDownLatch done = new CountDownLatch(cycles);
159	>	final Runnable task = new CheckedRunnable() {
160	>	public void realRun() { done.countDown(); }};
161	>	final ScheduledFuture periodicTask =
162	>	p.scheduleAtFixedRate(task, 0, delay, MILLISECONDS);
163	>	final int totalDelayMillis = (cycles - 1) * delay;
164	>	await(done, totalDelayMillis + LONG_DELAY_MS);
165	>	periodicTask.cancel(true);
166	>	final long elapsedMillis = millisElapsedSince(startTime);
167	>	assertTrue(elapsedMillis >= totalDelayMillis);
168	>	if (elapsedMillis <= cycles * delay)
169	>	return;
170	>	// else retry with longer delay
171	>	}
172	>	fail("unexpected execution rate");
173	>	}
174	>	}
175	>
176	>	/**
177	>	* scheduleWithFixedDelay executes series of tasks with given period.
178	>	* Eventually, it must hold that each task starts at least delay and at
179	>	* most 2 * delay after the termination of the previous task.
180	>	*/
181	>	public void testFixedDelaySequence() throws InterruptedException {
182	>	final ScheduledThreadPoolExecutor p = new ScheduledThreadPoolExecutor(1);
183	>	try (PoolCleaner cleaner = cleaner(p)) {
184	>	for (int delay = 1; delay <= LONG_DELAY_MS; delay *= 3) {
185	>	final long startTime = System.nanoTime();
186	>	final AtomicLong previous = new AtomicLong(startTime);
187	>	final AtomicBoolean tryLongerDelay = new AtomicBoolean(false);
188	>	final int cycles = 8;
189	>	final CountDownLatch done = new CountDownLatch(cycles);
190	>	final int d = delay;
191	>	final Runnable task = new CheckedRunnable() {
192	>	public void realRun() {
193	>	long now = System.nanoTime();
194	>	long elapsedMillis
195	>	= NANOSECONDS.toMillis(now - previous.get());
196	>	if (done.getCount() == cycles) { // first execution
197	>	if (elapsedMillis >= d)
198	>	tryLongerDelay.set(true);
199	>	} else {
200	>	assertTrue(elapsedMillis >= d);
201	>	if (elapsedMillis >= 2 * d)
202	>	tryLongerDelay.set(true);
203	>	}
204	>	previous.set(now);
205	>	done.countDown();
206	>	}};
207	>	final ScheduledFuture periodicTask =
208	>	p.scheduleWithFixedDelay(task, 0, delay, MILLISECONDS);
209	>	final int totalDelayMillis = (cycles - 1) * delay;
210	>	await(done, totalDelayMillis + cycles * LONG_DELAY_MS);
211	>	periodicTask.cancel(true);
212	>	final long elapsedMillis = millisElapsedSince(startTime);
213	>	assertTrue(elapsedMillis >= totalDelayMillis);
214	>	if (!tryLongerDelay.get())
215	>	return;
216	>	// else retry with longer delay
217	>	}
218	>	fail("unexpected execution rate");
219	>	}
220	>	}
221	>
222	>	/**
223	>	* execute(null) throws NPE
224	>	*/
225	>	public void testExecuteNull() throws InterruptedException {
226	>	final ScheduledThreadPoolExecutor p = new ScheduledThreadPoolExecutor(1);
227	>	try (PoolCleaner cleaner = cleaner(p)) {
228	>	try {
229	>	p.execute(null);
230	>	shouldThrow();
231	>	} catch (NullPointerException success) {}
232	>	}
233	>	}
234	>
235	>	/**
236	>	* schedule(null) throws NPE
237	>	*/
238	>	public void testScheduleNull() throws InterruptedException {
239	>	final ScheduledThreadPoolExecutor p = new ScheduledThreadPoolExecutor(1);
240	>	try (PoolCleaner cleaner = cleaner(p)) {
241	>	try {
242	>	TrackedCallable callable = null;
243	>	Future f = p.schedule(callable, SHORT_DELAY_MS, MILLISECONDS);
244	>	shouldThrow();
245	>	} catch (NullPointerException success) {}
246	>	}
247	>	}
248	>
249	>	/**
250	>	* execute throws RejectedExecutionException if shutdown
251	>	*/
252	>	public void testSchedule1_RejectedExecutionException() throws InterruptedException {
253	>	final ScheduledThreadPoolExecutor p = new ScheduledThreadPoolExecutor(1);
254	>	try (PoolCleaner cleaner = cleaner(p)) {
255	>	try {
256	>	p.shutdown();
257	>	p.schedule(new NoOpRunnable(),
258	>	MEDIUM_DELAY_MS, MILLISECONDS);
259	>	shouldThrow();
260	>	} catch (RejectedExecutionException success) {
261	>	} catch (SecurityException ok) {}
262	>	}
263	>	}
264	>
265	>	/**
266	>	* schedule throws RejectedExecutionException if shutdown
267	>	*/
268	>	public void testSchedule2_RejectedExecutionException() throws InterruptedException {
269	>	final ScheduledThreadPoolExecutor p = new ScheduledThreadPoolExecutor(1);
270	>	try (PoolCleaner cleaner = cleaner(p)) {
271	>	try {
272	>	p.shutdown();
273	>	p.schedule(new NoOpCallable(),
274	>	MEDIUM_DELAY_MS, MILLISECONDS);
275	>	shouldThrow();
276	>	} catch (RejectedExecutionException success) {
277	>	} catch (SecurityException ok) {}
278	>	}
279	>	}
280	>
281	>	/**
282	>	* schedule callable throws RejectedExecutionException if shutdown
283	>	*/
284	>	public void testSchedule3_RejectedExecutionException() throws InterruptedException {
285	>	final ScheduledThreadPoolExecutor p = new ScheduledThreadPoolExecutor(1);
286	>	try (PoolCleaner cleaner = cleaner(p)) {
287	>	try {
288	>	p.shutdown();
289	>	p.schedule(new NoOpCallable(),
290	>	MEDIUM_DELAY_MS, MILLISECONDS);
291	>	shouldThrow();
292	>	} catch (RejectedExecutionException success) {
293	>	} catch (SecurityException ok) {}
294	>	}
295	>	}
296	>
297	>	/**
298	>	* scheduleAtFixedRate throws RejectedExecutionException if shutdown
299	>	*/
300	>	public void testScheduleAtFixedRate1_RejectedExecutionException() throws InterruptedException {
301	>	final ScheduledThreadPoolExecutor p = new ScheduledThreadPoolExecutor(1);
302	>	try (PoolCleaner cleaner = cleaner(p)) {
303	>	try {
304	>	p.shutdown();
305	>	p.scheduleAtFixedRate(new NoOpRunnable(),
306	>	MEDIUM_DELAY_MS, MEDIUM_DELAY_MS, MILLISECONDS);
307	>	shouldThrow();
308	>	} catch (RejectedExecutionException success) {
309	>	} catch (SecurityException ok) {}
310	>	}
311	>	}
312	>
313	>	/**
314	>	* scheduleWithFixedDelay throws RejectedExecutionException if shutdown
315	>	*/
316	>	public void testScheduleWithFixedDelay1_RejectedExecutionException() throws InterruptedException {
317	>	final ScheduledThreadPoolExecutor p = new ScheduledThreadPoolExecutor(1);
318	>	try (PoolCleaner cleaner = cleaner(p)) {
319	>	try {
320	>	p.shutdown();
321	>	p.scheduleWithFixedDelay(new NoOpRunnable(),
322	>	MEDIUM_DELAY_MS, MEDIUM_DELAY_MS, MILLISECONDS);
323	>	shouldThrow();
324	>	} catch (RejectedExecutionException success) {
325	>	} catch (SecurityException ok) {}
326	>	}
327	>	}
328	>
329	>	/**
330	>	* getActiveCount increases but doesn't overestimate, when a
331	>	* thread becomes active
332	>	*/
333	>	public void testGetActiveCount() throws InterruptedException {
334	>	final CountDownLatch done = new CountDownLatch(1);
335	>	final ScheduledThreadPoolExecutor p = new ScheduledThreadPoolExecutor(2);
336	>	try (PoolCleaner cleaner = cleaner(p, done)) {
337	>	final CountDownLatch threadStarted = new CountDownLatch(1);
338	>	assertEquals(0, p.getActiveCount());
339	>	p.execute(new CheckedRunnable() {
340	>	public void realRun() throws InterruptedException {
341	>	threadStarted.countDown();
342	>	assertEquals(1, p.getActiveCount());
343	>	await(done);
344	>	}});
345	>	await(threadStarted);
346	>	assertEquals(1, p.getActiveCount());
347	>	}
348	>	}
349	>
350	>	/**
351	>	* getCompletedTaskCount increases, but doesn't overestimate,
352	>	* when tasks complete
353	>	*/
354	>	public void testGetCompletedTaskCount() throws InterruptedException {
355	>	final ThreadPoolExecutor p = new ScheduledThreadPoolExecutor(2);
356	>	try (PoolCleaner cleaner = cleaner(p)) {
357	>	final CountDownLatch threadStarted = new CountDownLatch(1);
358	>	final CountDownLatch threadProceed = new CountDownLatch(1);
359	>	final CountDownLatch threadDone = new CountDownLatch(1);
360	>	assertEquals(0, p.getCompletedTaskCount());
361	>	p.execute(new CheckedRunnable() {
362	>	public void realRun() throws InterruptedException {
363	>	threadStarted.countDown();
364	>	assertEquals(0, p.getCompletedTaskCount());
365	>	await(threadProceed);
366	>	threadDone.countDown();
367	>	}});
368	>	await(threadStarted);
369	>	assertEquals(0, p.getCompletedTaskCount());
370	>	threadProceed.countDown();
371	>	await(threadDone);
372	>	long startTime = System.nanoTime();
373	>	while (p.getCompletedTaskCount() != 1) {
374	>	if (millisElapsedSince(startTime) > LONG_DELAY_MS)
375	>	fail("timed out");
376	>	Thread.yield();
377	>	}
378	>	}
379	>	}
380	>
381	>	/**
382	>	* getCorePoolSize returns size given in constructor if not otherwise set
383	>	*/
384	>	public void testGetCorePoolSize() throws InterruptedException {
385	>	ThreadPoolExecutor p = new ScheduledThreadPoolExecutor(1);
386	>	try (PoolCleaner cleaner = cleaner(p)) {
387	>	assertEquals(1, p.getCorePoolSize());
388	>	}
389	>	}
390	>
391	>	/**
392	>	* getLargestPoolSize increases, but doesn't overestimate, when
393	>	* multiple threads active
394	>	*/
395	>	public void testGetLargestPoolSize() throws InterruptedException {
396	>	final int THREADS = 3;
397	>	final ThreadPoolExecutor p = new ScheduledThreadPoolExecutor(THREADS);
398	>	final CountDownLatch threadsStarted = new CountDownLatch(THREADS);
399	>	final CountDownLatch done = new CountDownLatch(1);
400	>	try (PoolCleaner cleaner = cleaner(p, done)) {
401	>	assertEquals(0, p.getLargestPoolSize());
402	>	for (int i = 0; i < THREADS; i++)
403	>	p.execute(new CheckedRunnable() {
404	>	public void realRun() throws InterruptedException {
405	>	threadsStarted.countDown();
406	>	await(done);
407	>	assertEquals(THREADS, p.getLargestPoolSize());
408	>	}});
409	>	await(threadsStarted);
410	>	assertEquals(THREADS, p.getLargestPoolSize());
411	>	}
412	>	assertEquals(THREADS, p.getLargestPoolSize());
413	>	}
414	>
415	>	/**
416	>	* getPoolSize increases, but doesn't overestimate, when threads
417	>	* become active
418	>	*/
419	>	public void testGetPoolSize() throws InterruptedException {
420	>	final ThreadPoolExecutor p = new ScheduledThreadPoolExecutor(1);
421	>	final CountDownLatch threadStarted = new CountDownLatch(1);
422	>	final CountDownLatch done = new CountDownLatch(1);
423	>	try (PoolCleaner cleaner = cleaner(p, done)) {
424	>	assertEquals(0, p.getPoolSize());
425	>	p.execute(new CheckedRunnable() {
426	>	public void realRun() throws InterruptedException {
427	>	threadStarted.countDown();
428	>	assertEquals(1, p.getPoolSize());
429	>	await(done);
430	>	}});
431	>	await(threadStarted);
432	>	assertEquals(1, p.getPoolSize());
433	>	}
434	>	}
435	>
436	>	/**
437	>	* getTaskCount increases, but doesn't overestimate, when tasks
438	>	* submitted
439	>	*/
440	>	public void testGetTaskCount() throws InterruptedException {
441	>	final int TASKS = 3;
442	>	final CountDownLatch done = new CountDownLatch(1);
443	>	final ThreadPoolExecutor p = new ScheduledThreadPoolExecutor(1);
444	>	try (PoolCleaner cleaner = cleaner(p, done)) {
445	>	final CountDownLatch threadStarted = new CountDownLatch(1);
446	>	assertEquals(0, p.getTaskCount());
447	>	assertEquals(0, p.getCompletedTaskCount());
448	>	p.execute(new CheckedRunnable() {
449	>	public void realRun() throws InterruptedException {
450	>	threadStarted.countDown();
451	>	await(done);
452	>	}});
453	>	await(threadStarted);
454	>	assertEquals(1, p.getTaskCount());
455	>	assertEquals(0, p.getCompletedTaskCount());
456	>	for (int i = 0; i < TASKS; i++) {
457	>	assertEquals(1 + i, p.getTaskCount());
458	>	p.execute(new CheckedRunnable() {
459	>	public void realRun() throws InterruptedException {
460	>	threadStarted.countDown();
461	>	assertEquals(1 + TASKS, p.getTaskCount());
462	>	await(done);
463	>	}});
464	>	}
465	>	assertEquals(1 + TASKS, p.getTaskCount());
466	>	assertEquals(0, p.getCompletedTaskCount());
467	>	}
468	>	assertEquals(1 + TASKS, p.getTaskCount());
469	>	assertEquals(1 + TASKS, p.getCompletedTaskCount());
470	>	}
471	>
472	>	/**
473	>	* getThreadFactory returns factory in constructor if not set
474	>	*/
475	>	public void testGetThreadFactory() throws InterruptedException {
476	>	final ThreadFactory threadFactory = new SimpleThreadFactory();
477	>	final ScheduledThreadPoolExecutor p =
478	>	new ScheduledThreadPoolExecutor(1, threadFactory);
479	>	try (PoolCleaner cleaner = cleaner(p)) {
480	>	assertSame(threadFactory, p.getThreadFactory());
481	>	}
482	>	}
483	>
484	>	/**
485	>	* setThreadFactory sets the thread factory returned by getThreadFactory
486	>	*/
487	>	public void testSetThreadFactory() throws InterruptedException {
488	>	ThreadFactory threadFactory = new SimpleThreadFactory();
489	>	final ScheduledThreadPoolExecutor p = new ScheduledThreadPoolExecutor(1);
490	>	try (PoolCleaner cleaner = cleaner(p)) {
491	>	p.setThreadFactory(threadFactory);
492	>	assertSame(threadFactory, p.getThreadFactory());
493	>	}
494	>	}
495	>
496	>	/**
497	>	* setThreadFactory(null) throws NPE
498	>	*/
499	>	public void testSetThreadFactoryNull() throws InterruptedException {
500	>	final ScheduledThreadPoolExecutor p = new ScheduledThreadPoolExecutor(1);
501	>	try (PoolCleaner cleaner = cleaner(p)) {
502	>	try {
503	>	p.setThreadFactory(null);
504	>	shouldThrow();
505	>	} catch (NullPointerException success) {}
506	>	}
507	>	}
508	>
509	>	/**
510	>	* The default rejected execution handler is AbortPolicy.
511	>	*/
512	>	public void testDefaultRejectedExecutionHandler() {
513	>	final ScheduledThreadPoolExecutor p = new ScheduledThreadPoolExecutor(1);
514	>	try (PoolCleaner cleaner = cleaner(p)) {
515	>	assertTrue(p.getRejectedExecutionHandler()
516	>	instanceof ThreadPoolExecutor.AbortPolicy);
517	>	}
518	>	}
519	>
520	>	/**
521	>	* isShutdown is false before shutdown, true after
522	>	*/
523	>	public void testIsShutdown() {
524	>	final ScheduledThreadPoolExecutor p = new ScheduledThreadPoolExecutor(1);
525	>	assertFalse(p.isShutdown());
526	>	try (PoolCleaner cleaner = cleaner(p)) {
527	>	try {
528	>	p.shutdown();
529	>	assertTrue(p.isShutdown());
530	>	} catch (SecurityException ok) {}
531	>	}
532	>	}
533	>
534	>	/**
535	>	* isTerminated is false before termination, true after
536	>	*/
537	>	public void testIsTerminated() throws InterruptedException {
538	>	final ThreadPoolExecutor p = new ScheduledThreadPoolExecutor(1);
539	>	try (PoolCleaner cleaner = cleaner(p)) {
540	>	final CountDownLatch threadStarted = new CountDownLatch(1);
541	>	final CountDownLatch done = new CountDownLatch(1);
542	>	assertFalse(p.isTerminated());
543	>	p.execute(new CheckedRunnable() {
544	>	public void realRun() throws InterruptedException {
545	>	assertFalse(p.isTerminated());
546	>	threadStarted.countDown();
547	>	await(done);
548	>	}});
549	>	await(threadStarted);
550	>	assertFalse(p.isTerminating());
551	>	done.countDown();
552	>	try { p.shutdown(); } catch (SecurityException ok) { return; }
553	>	assertTrue(p.awaitTermination(LONG_DELAY_MS, MILLISECONDS));
554	>	assertTrue(p.isTerminated());
555	>	}
556	>	}
557	>
558	>	/**
559	>	* isTerminating is not true when running or when terminated
560	>	*/
561	>	public void testIsTerminating() throws InterruptedException {
562	>	final ThreadPoolExecutor p = new ScheduledThreadPoolExecutor(1);
563	>	final CountDownLatch threadStarted = new CountDownLatch(1);
564	>	final CountDownLatch done = new CountDownLatch(1);
565	>	try (PoolCleaner cleaner = cleaner(p)) {
566	>	assertFalse(p.isTerminating());
567	>	p.execute(new CheckedRunnable() {
568	>	public void realRun() throws InterruptedException {
569	>	assertFalse(p.isTerminating());
570	>	threadStarted.countDown();
571	>	await(done);
572	>	}});
573	>	await(threadStarted);
574	>	assertFalse(p.isTerminating());
575	>	done.countDown();
576	>	try { p.shutdown(); } catch (SecurityException ok) { return; }
577	>	assertTrue(p.awaitTermination(LONG_DELAY_MS, MILLISECONDS));
578	>	assertTrue(p.isTerminated());
579	>	assertFalse(p.isTerminating());
580	>	}
581	>	}
582	>
583	>	/**
584	>	* getQueue returns the work queue, which contains queued tasks
585	>	*/
586	>	public void testGetQueue() throws InterruptedException {
587	>	final CountDownLatch done = new CountDownLatch(1);
588	>	final ScheduledThreadPoolExecutor p = new ScheduledThreadPoolExecutor(1);
589	>	try (PoolCleaner cleaner = cleaner(p, done)) {
590	>	final CountDownLatch threadStarted = new CountDownLatch(1);
591	>	ScheduledFuture[] tasks = new ScheduledFuture[5];
592	>	for (int i = 0; i < tasks.length; i++) {
593	>	Runnable r = new CheckedRunnable() {
594	>	public void realRun() throws InterruptedException {
595	>	threadStarted.countDown();
596	>	await(done);
597	>	}};
598	>	tasks[i] = p.schedule(r, 1, MILLISECONDS);
599	>	}
600	>	await(threadStarted);
601	>	BlockingQueue<Runnable> q = p.getQueue();
602	>	assertTrue(q.contains(tasks[tasks.length - 1]));
603	>	assertFalse(q.contains(tasks[0]));
604	>	}
605	>	}
606	>
607	>	/**
608	>	* remove(task) removes queued task, and fails to remove active task
609	>	*/
610	>	public void testRemove() throws InterruptedException {
611	>	final CountDownLatch done = new CountDownLatch(1);
612	>	final ScheduledThreadPoolExecutor p = new ScheduledThreadPoolExecutor(1);
613	>	try (PoolCleaner cleaner = cleaner(p, done)) {
614	>	ScheduledFuture[] tasks = new ScheduledFuture[5];
615	>	final CountDownLatch threadStarted = new CountDownLatch(1);
616	>	for (int i = 0; i < tasks.length; i++) {
617	>	Runnable r = new CheckedRunnable() {
618	>	public void realRun() throws InterruptedException {
619	>	threadStarted.countDown();
620	>	await(done);
621	>	}};
622	>	tasks[i] = p.schedule(r, 1, MILLISECONDS);
623	>	}
624	>	await(threadStarted);
625	>	BlockingQueue<Runnable> q = p.getQueue();
626	>	assertFalse(p.remove((Runnable)tasks[0]));
627	>	assertTrue(q.contains((Runnable)tasks[4]));
628	>	assertTrue(q.contains((Runnable)tasks[3]));
629	>	assertTrue(p.remove((Runnable)tasks[4]));
630	>	assertFalse(p.remove((Runnable)tasks[4]));
631	>	assertFalse(q.contains((Runnable)tasks[4]));
632	>	assertTrue(q.contains((Runnable)tasks[3]));
633	>	assertTrue(p.remove((Runnable)tasks[3]));
634	>	assertFalse(q.contains((Runnable)tasks[3]));
635	>	}
636	>	}
637	>
638	>	/**
639	>	* purge eventually removes cancelled tasks from the queue
640	>	*/
641	>	public void testPurge() throws InterruptedException {
642	>	final ScheduledFuture[] tasks = new ScheduledFuture[5];
643	>	final Runnable releaser = new Runnable() { public void run() {
644	>	for (ScheduledFuture task : tasks)
645	>	if (task != null) task.cancel(true); }};
646	>	final ScheduledThreadPoolExecutor p = new ScheduledThreadPoolExecutor(1);
647	>	try (PoolCleaner cleaner = cleaner(p, releaser)) {
648	>	for (int i = 0; i < tasks.length; i++)
649	>	tasks[i] = p.schedule(new SmallPossiblyInterruptedRunnable(),
650	>	LONG_DELAY_MS, MILLISECONDS);
651	>	int max = tasks.length;
652	>	if (tasks[4].cancel(true)) --max;
653	>	if (tasks[3].cancel(true)) --max;
654	>	// There must eventually be an interference-free point at
655	>	// which purge will not fail. (At worst, when queue is empty.)
656	>	long startTime = System.nanoTime();
657	>	do {
658	>	p.purge();
659	>	long count = p.getTaskCount();
660	>	if (count == max)
661	>	return;
662	>	} while (millisElapsedSince(startTime) < LONG_DELAY_MS);
663	>	fail("Purge failed to remove cancelled tasks");
664	>	}
665	>	}
666	>
667	>	/**
668	>	* shutdownNow returns a list containing tasks that were not run,
669	>	* and those tasks are drained from the queue
670	>	*/
671	>	public void testShutdownNow() throws InterruptedException {
672	>	final int poolSize = 2;
673	>	final int count = 5;
674	>	final AtomicInteger ran = new AtomicInteger(0);
675	>	final ScheduledThreadPoolExecutor p =
676	>	new ScheduledThreadPoolExecutor(poolSize);
677	>	final CountDownLatch threadsStarted = new CountDownLatch(poolSize);
678	>	Runnable waiter = new CheckedRunnable() { public void realRun() {
679	>	threadsStarted.countDown();
680	>	try {
681	>	MILLISECONDS.sleep(2 * LONG_DELAY_MS);
682	>	} catch (InterruptedException success) {}
683	>	ran.getAndIncrement();
684	>	}};
685	>	for (int i = 0; i < count; i++)
686	>	p.execute(waiter);
687	>	await(threadsStarted);
688	>	assertEquals(poolSize, p.getActiveCount());
689	>	assertEquals(0, p.getCompletedTaskCount());
690	>	final List<Runnable> queuedTasks;
691	>	try {
692	>	queuedTasks = p.shutdownNow();
693	>	} catch (SecurityException ok) {
694	>	return; // Allowed in case test doesn't have privs
695	>	}
696	>	assertTrue(p.isShutdown());
697	>	assertTrue(p.getQueue().isEmpty());
698	>	assertEquals(count - poolSize, queuedTasks.size());
699	>	assertTrue(p.awaitTermination(LONG_DELAY_MS, MILLISECONDS));
700	>	assertTrue(p.isTerminated());
701	>	assertEquals(poolSize, ran.get());
702	>	assertEquals(poolSize, p.getCompletedTaskCount());
703	>	}
704	>
705	>	/**
706	>	* shutdownNow returns a list containing tasks that were not run,
707	>	* and those tasks are drained from the queue
708	>	*/
709	>	public void testShutdownNow_delayedTasks() throws InterruptedException {
710	>	final ScheduledThreadPoolExecutor p = new ScheduledThreadPoolExecutor(1);
711	>	List<ScheduledFuture> tasks = new ArrayList<>();
712	>	for (int i = 0; i < 3; i++) {
713	>	Runnable r = new NoOpRunnable();
714	>	tasks.add(p.schedule(r, 9, SECONDS));
715	>	tasks.add(p.scheduleAtFixedRate(r, 9, 9, SECONDS));
716	>	tasks.add(p.scheduleWithFixedDelay(r, 9, 9, SECONDS));
717	>	}
718	>	if (testImplementationDetails)
719	>	assertEquals(new HashSet(tasks), new HashSet(p.getQueue()));
720	>	final List<Runnable> queuedTasks;
721	>	try {
722	>	queuedTasks = p.shutdownNow();
723	>	} catch (SecurityException ok) {
724	>	return; // Allowed in case test doesn't have privs
725	>	}
726	>	assertTrue(p.isShutdown());
727	>	assertTrue(p.getQueue().isEmpty());
728	>	if (testImplementationDetails)
729	>	assertEquals(new HashSet(tasks), new HashSet(queuedTasks));
730	>	assertEquals(tasks.size(), queuedTasks.size());
731	>	for (ScheduledFuture task : tasks) {
732	>	assertFalse(task.isDone());
733	>	assertFalse(task.isCancelled());
734	>	}
735	>	assertTrue(p.awaitTermination(LONG_DELAY_MS, MILLISECONDS));
736	>	assertTrue(p.isTerminated());
737	>	}
738	>
739	>	/**
740	>	* By default, periodic tasks are cancelled at shutdown.
741	>	* By default, delayed tasks keep running after shutdown.
742	>	* Check that changing the default values work:
743	>	* - setExecuteExistingDelayedTasksAfterShutdownPolicy
744	>	* - setContinueExistingPeriodicTasksAfterShutdownPolicy
745	>	*/
746	>	public void testShutdown_cancellation() throws Exception {
747	>	Boolean[] allBooleans = { null, Boolean.FALSE, Boolean.TRUE };
748	>	for (Boolean policy : allBooleans)
749	>	{
750	>	final int poolSize = 2;
751	>	final ScheduledThreadPoolExecutor p
752	>	= new ScheduledThreadPoolExecutor(poolSize);
753	>	final boolean effectiveDelayedPolicy = (policy != Boolean.FALSE);
754	>	final boolean effectivePeriodicPolicy = (policy == Boolean.TRUE);
755	>	final boolean effectiveRemovePolicy = (policy == Boolean.TRUE);
756	>	if (policy != null) {
757	>	p.setExecuteExistingDelayedTasksAfterShutdownPolicy(policy);
758	>	p.setContinueExistingPeriodicTasksAfterShutdownPolicy(policy);
759	>	p.setRemoveOnCancelPolicy(policy);
760	>	}
761	>	assertEquals(effectiveDelayedPolicy,
762	>	p.getExecuteExistingDelayedTasksAfterShutdownPolicy());
763	>	assertEquals(effectivePeriodicPolicy,
764	>	p.getContinueExistingPeriodicTasksAfterShutdownPolicy());
765	>	assertEquals(effectiveRemovePolicy,
766	>	p.getRemoveOnCancelPolicy());
767	>	// Strategy: Wedge the pool with poolSize "blocker" threads
768	>	final AtomicInteger ran = new AtomicInteger(0);
769	>	final CountDownLatch poolBlocked = new CountDownLatch(poolSize);
770	>	final CountDownLatch unblock = new CountDownLatch(1);
771	>	final CountDownLatch periodicLatch1 = new CountDownLatch(2);
772	>	final CountDownLatch periodicLatch2 = new CountDownLatch(2);
773	>	Runnable task = new CheckedRunnable() { public void realRun()
774	>	throws InterruptedException {
775	>	poolBlocked.countDown();
776	>	await(unblock);
777	>	ran.getAndIncrement();
778	>	}};
779	>	List<Future<?>> blockers = new ArrayList<>();
780	>	List<Future<?>> periodics = new ArrayList<>();
781	>	List<Future<?>> delayeds = new ArrayList<>();
782	>	for (int i = 0; i < poolSize; i++)
783	>	blockers.add(p.submit(task));
784	>	await(poolBlocked);
785	>
786	>	periodics.add(p.scheduleAtFixedRate(countDowner(periodicLatch1),
787	>	1, 1, MILLISECONDS));
788	>	periodics.add(p.scheduleWithFixedDelay(countDowner(periodicLatch2),
789	>	1, 1, MILLISECONDS));
790	>	delayeds.add(p.schedule(task, 1, MILLISECONDS));
791	>
792	>	assertTrue(p.getQueue().containsAll(periodics));
793	>	assertTrue(p.getQueue().containsAll(delayeds));
794	>	try { p.shutdown(); } catch (SecurityException ok) { return; }
795	>	assertTrue(p.isShutdown());
796	>	assertFalse(p.isTerminated());
797	>	for (Future<?> periodic : periodics) {
798	>	assertTrue(effectivePeriodicPolicy ^ periodic.isCancelled());
799	>	assertTrue(effectivePeriodicPolicy ^ periodic.isDone());
800	>	}
801	>	for (Future<?> delayed : delayeds) {
802	>	assertTrue(effectiveDelayedPolicy ^ delayed.isCancelled());
803	>	assertTrue(effectiveDelayedPolicy ^ delayed.isDone());
804	>	}
805	>	if (testImplementationDetails) {
806	>	assertEquals(effectivePeriodicPolicy,
807	>	p.getQueue().containsAll(periodics));
808	>	assertEquals(effectiveDelayedPolicy,
809	>	p.getQueue().containsAll(delayeds));
810	>	}
811	>	// Release all pool threads
812	>	unblock.countDown();
813	>
814	>	for (Future<?> delayed : delayeds) {
815	>	if (effectiveDelayedPolicy) {
816	>	assertNull(delayed.get());
817	>	}
818	>	}
819	>	if (effectivePeriodicPolicy) {
820	>	await(periodicLatch1);
821	>	await(periodicLatch2);
822	>	for (Future<?> periodic : periodics) {
823	>	assertTrue(periodic.cancel(false));
824	>	assertTrue(periodic.isCancelled());
825	>	assertTrue(periodic.isDone());
826	>	}
827	>	}
828	>	for (Future<?> blocker : blockers) assertNull(blocker.get());
829	>	assertTrue(p.awaitTermination(LONG_DELAY_MS, MILLISECONDS));
830	>	assertTrue(p.isTerminated());
831	>	assertEquals(2 + (effectiveDelayedPolicy ? 1 : 0), ran.get());
832	>	}}
833	>
834	>	/**
835	>	* completed submit of callable returns result
836	>	*/
837	>	public void testSubmitCallable() throws Exception {
838	>	final ExecutorService e = new ScheduledThreadPoolExecutor(2);
839	>	try (PoolCleaner cleaner = cleaner(e)) {
840	>	Future<String> future = e.submit(new StringTask());
841	>	String result = future.get();
842	>	assertSame(TEST_STRING, result);
843	>	}
844	>	}
845	>
846	>	/**
847	>	* completed submit of runnable returns successfully
848	>	*/
849	>	public void testSubmitRunnable() throws Exception {
850	>	final ExecutorService e = new ScheduledThreadPoolExecutor(2);
851	>	try (PoolCleaner cleaner = cleaner(e)) {
852	>	Future<?> future = e.submit(new NoOpRunnable());
853	>	future.get();
854	>	assertTrue(future.isDone());
855	>	}
856	>	}
857	>
858	>	/**
859	>	* completed submit of (runnable, result) returns result
860	>	*/
861	>	public void testSubmitRunnable2() throws Exception {
862	>	final ExecutorService e = new ScheduledThreadPoolExecutor(2);
863	>	try (PoolCleaner cleaner = cleaner(e)) {
864	>	Future<String> future = e.submit(new NoOpRunnable(), TEST_STRING);
865	>	String result = future.get();
866	>	assertSame(TEST_STRING, result);
867	>	}
868	>	}
869	>
870	>	/**
871	>	* invokeAny(null) throws NPE
872	>	*/
873	>	public void testInvokeAny1() throws Exception {
874	>	final ExecutorService e = new ScheduledThreadPoolExecutor(2);
875	>	try (PoolCleaner cleaner = cleaner(e)) {
876	>	try {
877	>	e.invokeAny(null);
878	>	shouldThrow();
879	>	} catch (NullPointerException success) {}
880	>	}
881	>	}
882	>
883	>	/**
884	>	* invokeAny(empty collection) throws IAE
885	>	*/
886	>	public void testInvokeAny2() throws Exception {
887	>	final ExecutorService e = new ScheduledThreadPoolExecutor(2);
888	>	try (PoolCleaner cleaner = cleaner(e)) {
889	>	try {
890	>	e.invokeAny(new ArrayList<Callable<String>>());
891	>	shouldThrow();
892	>	} catch (IllegalArgumentException success) {}
893	>	}
894	>	}
895	>
896	>	/**
897	>	* invokeAny(c) throws NPE if c has null elements
898	>	*/
899	>	public void testInvokeAny3() throws Exception {
900	>	CountDownLatch latch = new CountDownLatch(1);
901	>	final ExecutorService e = new ScheduledThreadPoolExecutor(2);
902	>	try (PoolCleaner cleaner = cleaner(e)) {
903	>	List<Callable<String>> l = new ArrayList<>();
904	>	l.add(latchAwaitingStringTask(latch));
905	>	l.add(null);
906	>	try {
907	>	e.invokeAny(l);
908	>	shouldThrow();
909	>	} catch (NullPointerException success) {}
910	>	latch.countDown();
911	>	}
912	>	}
913	>
914	>	/**
915	>	* invokeAny(c) throws ExecutionException if no task completes
916	>	*/
917	>	public void testInvokeAny4() throws Exception {
918	>	final ExecutorService e = new ScheduledThreadPoolExecutor(2);
919	>	try (PoolCleaner cleaner = cleaner(e)) {
920	>	List<Callable<String>> l = new ArrayList<>();
921	>	l.add(new NPETask());
922	>	try {
923	>	e.invokeAny(l);
924	>	shouldThrow();
925	>	} catch (ExecutionException success) {
926	>	assertTrue(success.getCause() instanceof NullPointerException);
927	>	}
928	>	}
929	>	}
930	>
931	>	/**
932	>	* invokeAny(c) returns result of some task
933	>	*/
934	>	public void testInvokeAny5() throws Exception {
935	>	final ExecutorService e = new ScheduledThreadPoolExecutor(2);
936	>	try (PoolCleaner cleaner = cleaner(e)) {
937	>	List<Callable<String>> l = new ArrayList<>();
938	>	l.add(new StringTask());
939	>	l.add(new StringTask());
940	>	String result = e.invokeAny(l);
941	>	assertSame(TEST_STRING, result);
942	>	}
943	>	}
944	>
945	>	/**
946	>	* invokeAll(null) throws NPE
947	>	*/
948	>	public void testInvokeAll1() throws Exception {
949	>	final ExecutorService e = new ScheduledThreadPoolExecutor(2);
950	>	try (PoolCleaner cleaner = cleaner(e)) {
951	>	try {
952	>	e.invokeAll(null);
953	>	shouldThrow();
954	>	} catch (NullPointerException success) {}
955	>	}
956	>	}
957	>
958	>	/**
959	>	* invokeAll(empty collection) returns empty collection
960	>	*/
961	>	public void testInvokeAll2() throws Exception {
962	>	final ExecutorService e = new ScheduledThreadPoolExecutor(2);
963	>	try (PoolCleaner cleaner = cleaner(e)) {
964	>	List<Future<String>> r = e.invokeAll(new ArrayList<Callable<String>>());
965	>	assertTrue(r.isEmpty());
966	>	}
967	>	}
968	>
969	>	/**
970	>	* invokeAll(c) throws NPE if c has null elements
971	>	*/
972	>	public void testInvokeAll3() throws Exception {
973	>	final ExecutorService e = new ScheduledThreadPoolExecutor(2);
974	>	try (PoolCleaner cleaner = cleaner(e)) {
975	>	List<Callable<String>> l = new ArrayList<>();
976	>	l.add(new StringTask());
977	>	l.add(null);
978	>	try {
979	>	e.invokeAll(l);
980	>	shouldThrow();
981	>	} catch (NullPointerException success) {}
982	>	}
983		}
984
985	<	private static long SHORT_DELAY_MS = 100;
986	<	private static long MEDIUM_DELAY_MS = 1000;
987	<	private static long LONG_DELAY_MS = 10000;
988	<
989	<	static class MyRunnable implements Runnable {
990	<	volatile boolean waiting = true;
991	<	volatile boolean done = false;
992	<	public void run(){
993	<	try{
994	<	Thread.sleep(MEDIUM_DELAY_MS);
995	<	waiting = false;
996	<	done = true;
997	<	} catch(Exception e){}
998	<	}
999	<	}
1000	<
1001	<	static class MyCallable implements Callable {
1002	<	volatile boolean waiting = true;
1003	<	volatile boolean done = false;
1004	<	public Object call(){
1005	<	try{
1006	<	Thread.sleep(MEDIUM_DELAY_MS);
1007	<	waiting = false;
1008	<	done = true;
1009	<	}catch(Exception e){}
1010	<	return Boolean.TRUE;
1011	<	}
1012	<	}
1013	<
1014	<	/**
1015	<	*  Test to verify execute successfully runs the given Runnable
1016	<	*/
1017	<	public void testExecute(){
1018	<	try{
1019	<	MyRunnable runnable =new MyRunnable();
1020	<	ScheduledExecutor one = new ScheduledExecutor(1);
1021	<	one.execute(runnable);
1022	<	Thread.sleep(100);
1023	<	assertTrue(runnable.waiting);
1024	<	one.shutdown();
1025	<	// make sure the Runnable has time to complete
1026	<	try{Thread.sleep(1010);}catch(InterruptedException e){}
1027	<	assertFalse(runnable.waiting);
1028	<	assertTrue(runnable.done);
1029	<	one.shutdown();
1030	<	}
1031	<	catch(Exception e){
1032	<	fail("unexpected exception");
1033	<	}
1034	<	}
1035	<
1036	<	/**
1037	<	*  Test to verify schedule successfully runs the given Callable.
1038	<	*  The waiting flag shows that the Callable is not started until
1039	<	*  immediately.
1040	<	*/
1041	<	public void testSchedule1(){
1042	<	try{
1043	<	MyCallable callable = new MyCallable();
1044	<	ScheduledExecutor one = new ScheduledExecutor(1);
1045	<	Future f = one.schedule(callable, 500, TimeUnit.MILLISECONDS);
1046	<	//      Thread.sleep(505);
1047	<	assertTrue(callable.waiting);
1048	<	Thread.sleep(2000);
1049	<	assertTrue(callable.done);
1050	<	assertEquals(Boolean.TRUE, f.get());
1051	<	one.shutdown();
1052	<	}catch(RejectedExecutionException e){}
1053	<	catch(Exception e){}
1054	<	}
1055	<
1056	<	/**
1057	<	*  Another version of schedule, only using Runnable instead of Callable
1058	<	*/
1059	<	public void testSchedule3(){
1060	<	try{
1061	<	MyRunnable runnable = new MyRunnable();
1062	<	ScheduledExecutor one = new ScheduledExecutor(1);
1063	<	one.schedule(runnable, 500, TimeUnit.MILLISECONDS);
1064	<	Thread.sleep(50);
1065	<	assertTrue(runnable.waiting);
1066	<	Thread.sleep(2000);
1067	<	assertTrue(runnable.done);
1068	<	one.shutdown();
1069	<	} catch(Exception e){
1070	<	fail("unexpected exception");
1071	<	}
1072	<	}
1073	<
1074	<	/**
1075	<	*  The final version of schedule, using both long, TimeUnit and Runnable
1076	<	*/
1077	<	public void testSchedule4(){
1078	<	try{
1079	<	MyRunnable runnable = new MyRunnable();
1080	<	ScheduledExecutor one = new ScheduledExecutor(1);
1081	<	one.schedule(runnable, 500, TimeUnit.MILLISECONDS);
1082	<	//      Thread.sleep(505);
1083	<	assertTrue(runnable.waiting);
1084	<	Thread.sleep(2000);
1085	<	assertTrue(runnable.done);
1086	<	one.shutdown();
1087	<	} catch(Exception e){
1088	<	fail("unexpected exception");
1089	<	}
1090	<	}
1091	<
1092	<
1093	<	// exception tests
1094	<
1095	<	/**
1096	<	*  Test to verify schedule(Runnable, long) throws RejectedExecutionException
1097	<	*  This occurs on an attempt to schedule a task on a shutdown executor
1098	<	*/
1099	<	public void testSchedule1_RejectedExecutionException(){
1100	<	try{
1101	<	ScheduledExecutor se = new ScheduledExecutor(1);
1102	<	se.shutdown();
1103	<	se.schedule(new Runnable(){
1104	<	public void run(){}
1105	<	}, 10000, TimeUnit.MILLISECONDS);
1106	<	fail("shoud throw");
1107	<	}catch(RejectedExecutionException e){}
1108	<	}
1109	<
1110	<	/**
1111	<	*  Test to verify schedule(Callable, long, TimeUnit) throws RejectedExecutionException
1112	<	*  This occurs on an attempt to schedule a task on a shutdown executor
1113	<	*/
1114	<	public void testSchedule2_RejectedExecutionException(){
1115	<	try{
1116	<	ScheduledExecutor se = new ScheduledExecutor(1);
1117	<	se.shutdown();
1118	<	se.schedule(new Callable(){
1119	<	public Object call(){
1120	<	return Boolean.TRUE;
1121	<	}
1122	<	}, (long)100, TimeUnit.SECONDS);
1123	<	fail("should throw");
1124	<	}catch(RejectedExecutionException e){}
1125	<	}
1126	<
1127	<	/**
1128	<	*  Test to verify schedule(Callable, long) throws RejectedExecutionException
1129	<	*  This occurs on an attempt to schedule a task on a shutdown executor
1130	<	*/
1131	<	public void testSchedule3_RejectedExecutionException(){
1132	<	try{
1133	<	ScheduledExecutor se = new ScheduledExecutor(1);
1134	<	se.shutdown();
1135	<	se.schedule(new Callable(){
1136	<	public Object call(){
1137	<	return Boolean.TRUE;
1138	<	}
1139	<	},  10000, TimeUnit.MILLISECONDS);
1140	<	fail("should throw");
1141	<	}catch(RejectedExecutionException e){}
1142	<	}
1143	<
1144	<	/**
1145	<	*  Test to verify scheduleAtFixedRate(Runnable, long, long, TimeUnit) throws
1146	<	*  RejectedExecutionException.
1147	<	*  This occurs on an attempt to schedule a task on a shutdown executor
1148	<	*/
1149	<	public void testScheduleAtFixedRate1_RejectedExecutionException(){
1150	<	try{
1151	<	ScheduledExecutor se = new ScheduledExecutor(1);
1152	<	se.shutdown();
1153	<	se.scheduleAtFixedRate(new Runnable(){
1154	<	public void run(){}
1155	<	}, 100, 100, TimeUnit.SECONDS);
1156	<	fail("should throw");
1157	<	}catch(RejectedExecutionException e){}
1158	<	}
1159	<
1160	<	/**
1161	<	*  Test to verify scheduleAtFixedRate(Runnable, long, long, TimeUnit) throws
1162	<	*  RejectedExecutionException.
1163	<	*  This occurs on an attempt to schedule a task on a shutdown executor
1164	<	*/
1165	<	public void testScheduleAtFixedRate2_RejectedExecutionException(){
1166	<	try{
1167	<	ScheduledExecutor se = new ScheduledExecutor(1);
1168	<	se.shutdown();
1169	<	se.scheduleAtFixedRate(new Runnable(){
1170	<	public void run(){}
1171	<	},  1, 100, TimeUnit.SECONDS);
1172	<	fail("should throw");
1173	<	}catch(RejectedExecutionException e){}
1174	<	}
1175	<
1176	<	/**
1177	<	*  Test to verify scheduleWithFixedDelay(Runnable, long, long, TimeUnit) throws
1178	<	*  RejectedExecutionException.
1179	<	*  This occurs on an attempt to schedule a task on a shutdown executor
1180	<	*/
1181	<	public void testScheduleWithFixedDelay1_RejectedExecutionException(){
1182	<	try{
1183	<	ScheduledExecutor se = new ScheduledExecutor(1);
1184	<	se.shutdown();
1185	<	se.scheduleWithFixedDelay(new Runnable(){
1186	<	public void run(){}
1187	<	}, 100, 100, TimeUnit.SECONDS);
1188	<	fail("should throw");
1189	<	}catch(RejectedExecutionException e){}
1190	<	}
1191	<
1192	<	/**
1193	<	*  Test to verify scheduleWithFixedDelay(Runnable, long, long, TimeUnit) throws
1194	<	*  RejectedExecutionException.
1195	<	*  This occurs on an attempt to schedule a task on a shutdown executor
1196	<	*/
1197	<	public void testScheduleWithFixedDelay2_RejectedExecutionException(){
1198	<	try{
1199	<	ScheduledExecutor se = new ScheduledExecutor(1);
1200	<	se.shutdown();
1201	<	se.scheduleWithFixedDelay(new Runnable(){
1202	<	public void run(){}
1203	<	},  1, 100, TimeUnit.SECONDS);
1204	<	fail("should throw");
1205	<	}catch(RejectedExecutionException e){}
1206	<	}
1207	<
1208	<	/**
1209	<	*  Test to verify execute throws RejectedExecutionException
1210	<	*  This occurs on an attempt to schedule a task on a shutdown executor
1211	<	*/
1212	<	public void testExecute_RejectedExecutionException(){
1213	<	try{
1214	<	ScheduledExecutor se = new ScheduledExecutor(1);
1215	<	se.shutdown();
1216	<	se.execute(new Runnable(){
1217	<	public void run(){}
1218	<	});
1219	<	fail("should throw");
1220	<	}catch(RejectedExecutionException e){}
985	>	/**
986	>	* get of invokeAll(c) throws exception on failed task
987	>	*/
988	>	public void testInvokeAll4() throws Exception {
989	>	final ExecutorService e = new ScheduledThreadPoolExecutor(2);
990	>	try (PoolCleaner cleaner = cleaner(e)) {
991	>	List<Callable<String>> l = new ArrayList<>();
992	>	l.add(new NPETask());
993	>	List<Future<String>> futures = e.invokeAll(l);
994	>	assertEquals(1, futures.size());
995	>	try {
996	>	futures.get(0).get();
997	>	shouldThrow();
998	>	} catch (ExecutionException success) {
999	>	assertTrue(success.getCause() instanceof NullPointerException);
1000	>	}
1001	>	}
1002	>	}
1003	>
1004	>	/**
1005	>	* invokeAll(c) returns results of all completed tasks
1006	>	*/
1007	>	public void testInvokeAll5() throws Exception {
1008	>	final ExecutorService e = new ScheduledThreadPoolExecutor(2);
1009	>	try (PoolCleaner cleaner = cleaner(e)) {
1010	>	List<Callable<String>> l = new ArrayList<>();
1011	>	l.add(new StringTask());
1012	>	l.add(new StringTask());
1013	>	List<Future<String>> futures = e.invokeAll(l);
1014	>	assertEquals(2, futures.size());
1015	>	for (Future<String> future : futures)
1016	>	assertSame(TEST_STRING, future.get());
1017	>	}
1018	>	}
1019	>
1020	>	/**
1021	>	* timed invokeAny(null) throws NPE
1022	>	*/
1023	>	public void testTimedInvokeAny1() throws Exception {
1024	>	final ExecutorService e = new ScheduledThreadPoolExecutor(2);
1025	>	try (PoolCleaner cleaner = cleaner(e)) {
1026	>	try {
1027	>	e.invokeAny(null, MEDIUM_DELAY_MS, MILLISECONDS);
1028	>	shouldThrow();
1029	>	} catch (NullPointerException success) {}
1030	>	}
1031	>	}
1032	>
1033	>	/**
1034	>	* timed invokeAny(,,null) throws NPE
1035	>	*/
1036	>	public void testTimedInvokeAnyNullTimeUnit() throws Exception {
1037	>	final ExecutorService e = new ScheduledThreadPoolExecutor(2);
1038	>	try (PoolCleaner cleaner = cleaner(e)) {
1039	>	List<Callable<String>> l = new ArrayList<>();
1040	>	l.add(new StringTask());
1041	>	try {
1042	>	e.invokeAny(l, MEDIUM_DELAY_MS, null);
1043	>	shouldThrow();
1044	>	} catch (NullPointerException success) {}
1045	>	}
1046	>	}
1047	>
1048	>	/**
1049	>	* timed invokeAny(empty collection) throws IAE
1050	>	*/
1051	>	public void testTimedInvokeAny2() throws Exception {
1052	>	final ExecutorService e = new ScheduledThreadPoolExecutor(2);
1053	>	try (PoolCleaner cleaner = cleaner(e)) {
1054	>	try {
1055	>	e.invokeAny(new ArrayList<Callable<String>>(), MEDIUM_DELAY_MS, MILLISECONDS);
1056	>	shouldThrow();
1057	>	} catch (IllegalArgumentException success) {}
1058	>	}
1059	>	}
1060	>
1061	>	/**
1062	>	* timed invokeAny(c) throws NPE if c has null elements
1063	>	*/
1064	>	public void testTimedInvokeAny3() throws Exception {
1065	>	CountDownLatch latch = new CountDownLatch(1);
1066	>	final ExecutorService e = new ScheduledThreadPoolExecutor(2);
1067	>	try (PoolCleaner cleaner = cleaner(e)) {
1068	>	List<Callable<String>> l = new ArrayList<>();
1069	>	l.add(latchAwaitingStringTask(latch));
1070	>	l.add(null);
1071	>	try {
1072	>	e.invokeAny(l, MEDIUM_DELAY_MS, MILLISECONDS);
1073	>	shouldThrow();
1074	>	} catch (NullPointerException success) {}
1075	>	latch.countDown();
1076	>	}
1077	>	}
1078	>
1079	>	/**
1080	>	* timed invokeAny(c) throws ExecutionException if no task completes
1081	>	*/
1082	>	public void testTimedInvokeAny4() throws Exception {
1083	>	final ExecutorService e = new ScheduledThreadPoolExecutor(2);
1084	>	try (PoolCleaner cleaner = cleaner(e)) {
1085	>	long startTime = System.nanoTime();
1086	>	List<Callable<String>> l = new ArrayList<>();
1087	>	l.add(new NPETask());
1088	>	try {
1089	>	e.invokeAny(l, LONG_DELAY_MS, MILLISECONDS);
1090	>	shouldThrow();
1091	>	} catch (ExecutionException success) {
1092	>	assertTrue(success.getCause() instanceof NullPointerException);
1093	>	}
1094	>	assertTrue(millisElapsedSince(startTime) < LONG_DELAY_MS);
1095	>	}
1096	>	}
1097	>
1098	>	/**
1099	>	* timed invokeAny(c) returns result of some task
1100	>	*/
1101	>	public void testTimedInvokeAny5() throws Exception {
1102	>	final ExecutorService e = new ScheduledThreadPoolExecutor(2);
1103	>	try (PoolCleaner cleaner = cleaner(e)) {
1104	>	long startTime = System.nanoTime();
1105	>	List<Callable<String>> l = new ArrayList<>();
1106	>	l.add(new StringTask());
1107	>	l.add(new StringTask());
1108	>	String result = e.invokeAny(l, LONG_DELAY_MS, MILLISECONDS);
1109	>	assertSame(TEST_STRING, result);
1110	>	assertTrue(millisElapsedSince(startTime) < LONG_DELAY_MS);
1111	>	}
1112	>	}
1113	>
1114	>	/**
1115	>	* timed invokeAll(null) throws NPE
1116	>	*/
1117	>	public void testTimedInvokeAll1() throws Exception {
1118	>	final ExecutorService e = new ScheduledThreadPoolExecutor(2);
1119	>	try (PoolCleaner cleaner = cleaner(e)) {
1120	>	try {
1121	>	e.invokeAll(null, MEDIUM_DELAY_MS, MILLISECONDS);
1122	>	shouldThrow();
1123	>	} catch (NullPointerException success) {}
1124	>	}
1125	>	}
1126	>
1127	>	/**
1128	>	* timed invokeAll(,,null) throws NPE
1129	>	*/
1130	>	public void testTimedInvokeAllNullTimeUnit() throws Exception {
1131	>	final ExecutorService e = new ScheduledThreadPoolExecutor(2);
1132	>	try (PoolCleaner cleaner = cleaner(e)) {
1133	>	List<Callable<String>> l = new ArrayList<>();
1134	>	l.add(new StringTask());
1135	>	try {
1136	>	e.invokeAll(l, MEDIUM_DELAY_MS, null);
1137	>	shouldThrow();
1138	>	} catch (NullPointerException success) {}
1139	>	}
1140	>	}
1141	>
1142	>	/**
1143	>	* timed invokeAll(empty collection) returns empty collection
1144	>	*/
1145	>	public void testTimedInvokeAll2() throws Exception {
1146	>	final ExecutorService e = new ScheduledThreadPoolExecutor(2);
1147	>	try (PoolCleaner cleaner = cleaner(e)) {
1148	>	List<Future<String>> r = e.invokeAll(new ArrayList<Callable<String>>(),
1149	>	MEDIUM_DELAY_MS, MILLISECONDS);
1150	>	assertTrue(r.isEmpty());
1151	>	}
1152	>	}
1153	>
1154	>	/**
1155	>	* timed invokeAll(c) throws NPE if c has null elements
1156	>	*/
1157	>	public void testTimedInvokeAll3() throws Exception {
1158	>	final ExecutorService e = new ScheduledThreadPoolExecutor(2);
1159	>	try (PoolCleaner cleaner = cleaner(e)) {
1160	>	List<Callable<String>> l = new ArrayList<>();
1161	>	l.add(new StringTask());
1162	>	l.add(null);
1163	>	try {
1164	>	e.invokeAll(l, MEDIUM_DELAY_MS, MILLISECONDS);
1165	>	shouldThrow();
1166	>	} catch (NullPointerException success) {}
1167	>	}
1168	>	}
1169	>
1170	>	/**
1171	>	* get of element of invokeAll(c) throws exception on failed task
1172	>	*/
1173	>	public void testTimedInvokeAll4() throws Exception {
1174	>	final ExecutorService e = new ScheduledThreadPoolExecutor(2);
1175	>	try (PoolCleaner cleaner = cleaner(e)) {
1176	>	List<Callable<String>> l = new ArrayList<>();
1177	>	l.add(new NPETask());
1178	>	List<Future<String>> futures =
1179	>	e.invokeAll(l, LONG_DELAY_MS, MILLISECONDS);
1180	>	assertEquals(1, futures.size());
1181	>	try {
1182	>	futures.get(0).get();
1183	>	shouldThrow();
1184	>	} catch (ExecutionException success) {
1185	>	assertTrue(success.getCause() instanceof NullPointerException);
1186	>	}
1187	>	}
1188	>	}
1189	>
1190	>	/**
1191	>	* timed invokeAll(c) returns results of all completed tasks
1192	>	*/
1193	>	public void testTimedInvokeAll5() throws Exception {
1194	>	final ExecutorService e = new ScheduledThreadPoolExecutor(2);
1195	>	try (PoolCleaner cleaner = cleaner(e)) {
1196	>	List<Callable<String>> l = new ArrayList<>();
1197	>	l.add(new StringTask());
1198	>	l.add(new StringTask());
1199	>	List<Future<String>> futures =
1200	>	e.invokeAll(l, LONG_DELAY_MS, MILLISECONDS);
1201	>	assertEquals(2, futures.size());
1202	>	for (Future<String> future : futures)
1203	>	assertSame(TEST_STRING, future.get());
1204	>	}
1205	>	}
1206	>
1207	>	/**
1208	>	* timed invokeAll(c) cancels tasks not completed by timeout
1209	>	*/
1210	>	public void testTimedInvokeAll6() throws Exception {
1211	>	for (long timeout = timeoutMillis();;) {
1212	>	final CountDownLatch done = new CountDownLatch(1);
1213	>	final Callable<String> waiter = new CheckedCallable<String>() {
1214	>	public String realCall() {
1215	>	try { done.await(LONG_DELAY_MS, MILLISECONDS); }
1216	>	catch (InterruptedException ok) {}
1217	>	return "1"; }};
1218	>	final ExecutorService p = new ScheduledThreadPoolExecutor(2);
1219	>	try (PoolCleaner cleaner = cleaner(p, done)) {
1220	>	List<Callable<String>> tasks = new ArrayList<>();
1221	>	tasks.add(new StringTask("0"));
1222	>	tasks.add(waiter);
1223	>	tasks.add(new StringTask("2"));
1224	>	long startTime = System.nanoTime();
1225	>	List<Future<String>> futures =
1226	>	p.invokeAll(tasks, timeout, MILLISECONDS);
1227	>	assertEquals(tasks.size(), futures.size());
1228	>	assertTrue(millisElapsedSince(startTime) >= timeout);
1229	>	for (Future future : futures)
1230	>	assertTrue(future.isDone());
1231	>	assertTrue(futures.get(1).isCancelled());
1232	>	try {
1233	>	assertEquals("0", futures.get(0).get());
1234	>	assertEquals("2", futures.get(2).get());
1235	>	break;
1236	>	} catch (CancellationException retryWithLongerTimeout) {
1237	>	timeout *= 2;
1238	>	if (timeout >= LONG_DELAY_MS / 2)
1239	>	fail("expected exactly one task to be cancelled");
1240	>	}
1241	>	}
1242	>	}
1243	>	}
1244	>
1245	>	/**
1246	>	* A fixed delay task with overflowing period should not prevent a
1247	>	* one-shot task from executing.
1248	>	* https://bugs.openjdk.java.net/browse/JDK-8051859
1249	>	*/
1250	>	public void testScheduleWithFixedDelay_overflow() throws Exception {
1251	>	final CountDownLatch delayedDone = new CountDownLatch(1);
1252	>	final CountDownLatch immediateDone = new CountDownLatch(1);
1253	>	final ScheduledThreadPoolExecutor p = new ScheduledThreadPoolExecutor(1);
1254	>	try (PoolCleaner cleaner = cleaner(p)) {
1255	>	final Runnable immediate = new Runnable() { public void run() {
1256	>	immediateDone.countDown();
1257	>	}};
1258	>	final Runnable delayed = new Runnable() { public void run() {
1259	>	delayedDone.countDown();
1260	>	p.submit(immediate);
1261	>	}};
1262	>	p.scheduleWithFixedDelay(delayed, 0L, Long.MAX_VALUE, SECONDS);
1263	>	await(delayedDone);
1264	>	await(immediateDone);
1265	>	}
1266		}
1267
1268		}

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