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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 1.88 by jsr166, Sun Mar 26 02:00:39 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.ThreadLocalRandom;
28	+	import java.util.concurrent.ThreadPoolExecutor;
29	+	import java.util.concurrent.atomic.AtomicBoolean;
30	+	import java.util.concurrent.atomic.AtomicInteger;
31	+	import java.util.concurrent.atomic.AtomicLong;
32	+
33	+	import junit.framework.Test;
34	+	import junit.framework.TestSuite;
35	+
36	+	public class ScheduledExecutorTest extends JSR166TestCase {
37		public static void main(String[] args) {
38	<	junit.textui.TestRunner.run (suite());
38	>	main(suite(), args);
39		}
19	–
20	–
40		public static Test suite() {
41	<	return new TestSuite(ScheduledExecutorTest.class);
41	>	return new TestSuite(ScheduledExecutorTest.class);
42	>	}
43	>
44	>	/**
45	>	* execute successfully executes a runnable
46	>	*/
47	>	public void testExecute() throws InterruptedException {
48	>	final ScheduledThreadPoolExecutor p = new ScheduledThreadPoolExecutor(1);
49	>	try (PoolCleaner cleaner = cleaner(p)) {
50	>	final CountDownLatch done = new CountDownLatch(1);
51	>	final Runnable task = new CheckedRunnable() {
52	>	public void realRun() { done.countDown(); }};
53	>	p.execute(task);
54	>	await(done);
55	>	}
56	>	}
57	>
58	>	/**
59	>	* delayed schedule of callable successfully executes after delay
60	>	*/
61	>	public void testSchedule1() throws Exception {
62	>	final ScheduledThreadPoolExecutor p = new ScheduledThreadPoolExecutor(1);
63	>	try (PoolCleaner cleaner = cleaner(p)) {
64	>	final long startTime = System.nanoTime();
65	>	final CountDownLatch done = new CountDownLatch(1);
66	>	Callable task = new CheckedCallable<Boolean>() {
67	>	public Boolean realCall() {
68	>	done.countDown();
69	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis());
70	>	return Boolean.TRUE;
71	>	}};
72	>	Future f = p.schedule(task, timeoutMillis(), MILLISECONDS);
73	>	assertSame(Boolean.TRUE, f.get());
74	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis());
75	>	assertTrue(done.await(0L, MILLISECONDS));
76	>	}
77	>	}
78	>
79	>	/**
80	>	* delayed schedule of runnable successfully executes after delay
81	>	*/
82	>	public void testSchedule3() throws Exception {
83	>	final ScheduledThreadPoolExecutor p = new ScheduledThreadPoolExecutor(1);
84	>	try (PoolCleaner cleaner = cleaner(p)) {
85	>	final long startTime = System.nanoTime();
86	>	final CountDownLatch done = new CountDownLatch(1);
87	>	Runnable task = new CheckedRunnable() {
88	>	public void realRun() {
89	>	done.countDown();
90	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis());
91	>	}};
92	>	Future f = p.schedule(task, timeoutMillis(), MILLISECONDS);
93	>	await(done);
94	>	assertNull(f.get(LONG_DELAY_MS, MILLISECONDS));
95	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis());
96	>	}
97	>	}
98	>
99	>	/**
100	>	* scheduleAtFixedRate executes runnable after given initial delay
101	>	*/
102	>	public void testSchedule4() throws Exception {
103	>	final ScheduledThreadPoolExecutor p = new ScheduledThreadPoolExecutor(1);
104	>	try (PoolCleaner cleaner = cleaner(p)) {
105	>	final long startTime = System.nanoTime();
106	>	final CountDownLatch done = new CountDownLatch(1);
107	>	Runnable task = new CheckedRunnable() {
108	>	public void realRun() {
109	>	done.countDown();
110	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis());
111	>	}};
112	>	ScheduledFuture f =
113	>	p.scheduleAtFixedRate(task, timeoutMillis(),
114	>	LONG_DELAY_MS, MILLISECONDS);
115	>	await(done);
116	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis());
117	>	f.cancel(true);
118	>	}
119	>	}
120	>
121	>	/**
122	>	* scheduleWithFixedDelay executes runnable after given initial delay
123	>	*/
124	>	public void testSchedule5() throws Exception {
125	>	final ScheduledThreadPoolExecutor p = new ScheduledThreadPoolExecutor(1);
126	>	try (PoolCleaner cleaner = cleaner(p)) {
127	>	final long startTime = System.nanoTime();
128	>	final CountDownLatch done = new CountDownLatch(1);
129	>	Runnable task = new CheckedRunnable() {
130	>	public void realRun() {
131	>	done.countDown();
132	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis());
133	>	}};
134	>	ScheduledFuture f =
135	>	p.scheduleWithFixedDelay(task, timeoutMillis(),
136	>	LONG_DELAY_MS, MILLISECONDS);
137	>	await(done);
138	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis());
139	>	f.cancel(true);
140	>	}
141	>	}
142	>
143	>	static class RunnableCounter implements Runnable {
144	>	AtomicInteger count = new AtomicInteger(0);
145	>	public void run() { count.getAndIncrement(); }
146	>	}
147	>
148	>	/**
149	>	* scheduleAtFixedRate executes series of tasks at given rate.
150	>	* Eventually, it must hold that:
151	>	*   cycles - 1 <= elapsedMillis/delay < cycles
152	>	*/
153	>	public void testFixedRateSequence() throws InterruptedException {
154	>	final ScheduledThreadPoolExecutor p = new ScheduledThreadPoolExecutor(1);
155	>	try (PoolCleaner cleaner = cleaner(p)) {
156	>	for (int delay = 1; delay <= LONG_DELAY_MS; delay *= 3) {
157	>	final long startTime = System.nanoTime();
158	>	final int cycles = 8;
159	>	final CountDownLatch done = new CountDownLatch(cycles);
160	>	final Runnable task = new CheckedRunnable() {
161	>	public void realRun() { done.countDown(); }};
162	>	final ScheduledFuture periodicTask =
163	>	p.scheduleAtFixedRate(task, 0, delay, MILLISECONDS);
164	>	final int totalDelayMillis = (cycles - 1) * delay;
165	>	await(done, totalDelayMillis + LONG_DELAY_MS);
166	>	periodicTask.cancel(true);
167	>	final long elapsedMillis = millisElapsedSince(startTime);
168	>	assertTrue(elapsedMillis >= totalDelayMillis);
169	>	if (elapsedMillis <= cycles * delay)
170	>	return;
171	>	// else retry with longer delay
172	>	}
173	>	fail("unexpected execution rate");
174	>	}
175	>	}
176	>
177	>	/**
178	>	* scheduleWithFixedDelay executes series of tasks with given period.
179	>	* Eventually, it must hold that each task starts at least delay and at
180	>	* most 2 * delay after the termination of the previous task.
181	>	*/
182	>	public void testFixedDelaySequence() throws InterruptedException {
183	>	final ScheduledThreadPoolExecutor p = new ScheduledThreadPoolExecutor(1);
184	>	try (PoolCleaner cleaner = cleaner(p)) {
185	>	for (int delay = 1; delay <= LONG_DELAY_MS; delay *= 3) {
186	>	final long startTime = System.nanoTime();
187	>	final AtomicLong previous = new AtomicLong(startTime);
188	>	final AtomicBoolean tryLongerDelay = new AtomicBoolean(false);
189	>	final int cycles = 8;
190	>	final CountDownLatch done = new CountDownLatch(cycles);
191	>	final int d = delay;
192	>	final Runnable task = new CheckedRunnable() {
193	>	public void realRun() {
194	>	long now = System.nanoTime();
195	>	long elapsedMillis
196	>	= NANOSECONDS.toMillis(now - previous.get());
197	>	if (done.getCount() == cycles) { // first execution
198	>	if (elapsedMillis >= d)
199	>	tryLongerDelay.set(true);
200	>	} else {
201	>	assertTrue(elapsedMillis >= d);
202	>	if (elapsedMillis >= 2 * d)
203	>	tryLongerDelay.set(true);
204	>	}
205	>	previous.set(now);
206	>	done.countDown();
207	>	}};
208	>	final ScheduledFuture periodicTask =
209	>	p.scheduleWithFixedDelay(task, 0, delay, MILLISECONDS);
210	>	final int totalDelayMillis = (cycles - 1) * delay;
211	>	await(done, totalDelayMillis + cycles * LONG_DELAY_MS);
212	>	periodicTask.cancel(true);
213	>	final long elapsedMillis = millisElapsedSince(startTime);
214	>	assertTrue(elapsedMillis >= totalDelayMillis);
215	>	if (!tryLongerDelay.get())
216	>	return;
217	>	// else retry with longer delay
218	>	}
219	>	fail("unexpected execution rate");
220	>	}
221	>	}
222	>
223	>	/**
224	>	* execute(null) throws NPE
225	>	*/
226	>	public void testExecuteNull() throws InterruptedException {
227	>	final ScheduledThreadPoolExecutor p = new ScheduledThreadPoolExecutor(1);
228	>	try (PoolCleaner cleaner = cleaner(p)) {
229	>	try {
230	>	p.execute(null);
231	>	shouldThrow();
232	>	} catch (NullPointerException success) {}
233	>	}
234	>	}
235	>
236	>	/**
237	>	* schedule(null) throws NPE
238	>	*/
239	>	public void testScheduleNull() throws InterruptedException {
240	>	final ScheduledThreadPoolExecutor p = new ScheduledThreadPoolExecutor(1);
241	>	try (PoolCleaner cleaner = cleaner(p)) {
242	>	try {
243	>	TrackedCallable callable = null;
244	>	Future f = p.schedule(callable, SHORT_DELAY_MS, MILLISECONDS);
245	>	shouldThrow();
246	>	} catch (NullPointerException success) {}
247	>	}
248	>	}
249	>
250	>	/**
251	>	* execute throws RejectedExecutionException if shutdown
252	>	*/
253	>	public void testSchedule1_RejectedExecutionException() throws InterruptedException {
254	>	final ScheduledThreadPoolExecutor p = new ScheduledThreadPoolExecutor(1);
255	>	try (PoolCleaner cleaner = cleaner(p)) {
256	>	try {
257	>	p.shutdown();
258	>	p.schedule(new NoOpRunnable(),
259	>	MEDIUM_DELAY_MS, MILLISECONDS);
260	>	shouldThrow();
261	>	} catch (RejectedExecutionException success) {
262	>	} catch (SecurityException ok) {}
263	>	}
264	>	}
265	>
266	>	/**
267	>	* schedule throws RejectedExecutionException if shutdown
268	>	*/
269	>	public void testSchedule2_RejectedExecutionException() throws InterruptedException {
270	>	final ScheduledThreadPoolExecutor p = new ScheduledThreadPoolExecutor(1);
271	>	try (PoolCleaner cleaner = cleaner(p)) {
272	>	try {
273	>	p.shutdown();
274	>	p.schedule(new NoOpCallable(),
275	>	MEDIUM_DELAY_MS, MILLISECONDS);
276	>	shouldThrow();
277	>	} catch (RejectedExecutionException success) {
278	>	} catch (SecurityException ok) {}
279	>	}
280	>	}
281	>
282	>	/**
283	>	* schedule callable throws RejectedExecutionException if shutdown
284	>	*/
285	>	public void testSchedule3_RejectedExecutionException() throws InterruptedException {
286	>	final ScheduledThreadPoolExecutor p = new ScheduledThreadPoolExecutor(1);
287	>	try (PoolCleaner cleaner = cleaner(p)) {
288	>	try {
289	>	p.shutdown();
290	>	p.schedule(new NoOpCallable(),
291	>	MEDIUM_DELAY_MS, MILLISECONDS);
292	>	shouldThrow();
293	>	} catch (RejectedExecutionException success) {
294	>	} catch (SecurityException ok) {}
295	>	}
296	>	}
297	>
298	>	/**
299	>	* scheduleAtFixedRate throws RejectedExecutionException if shutdown
300	>	*/
301	>	public void testScheduleAtFixedRate1_RejectedExecutionException() throws InterruptedException {
302	>	final ScheduledThreadPoolExecutor p = new ScheduledThreadPoolExecutor(1);
303	>	try (PoolCleaner cleaner = cleaner(p)) {
304	>	try {
305	>	p.shutdown();
306	>	p.scheduleAtFixedRate(new NoOpRunnable(),
307	>	MEDIUM_DELAY_MS, MEDIUM_DELAY_MS, MILLISECONDS);
308	>	shouldThrow();
309	>	} catch (RejectedExecutionException success) {
310	>	} catch (SecurityException ok) {}
311	>	}
312	>	}
313	>
314	>	/**
315	>	* scheduleWithFixedDelay throws RejectedExecutionException if shutdown
316	>	*/
317	>	public void testScheduleWithFixedDelay1_RejectedExecutionException() throws InterruptedException {
318	>	final ScheduledThreadPoolExecutor p = new ScheduledThreadPoolExecutor(1);
319	>	try (PoolCleaner cleaner = cleaner(p)) {
320	>	try {
321	>	p.shutdown();
322	>	p.scheduleWithFixedDelay(new NoOpRunnable(),
323	>	MEDIUM_DELAY_MS, MEDIUM_DELAY_MS, MILLISECONDS);
324	>	shouldThrow();
325	>	} catch (RejectedExecutionException success) {
326	>	} catch (SecurityException ok) {}
327	>	}
328	>	}
329	>
330	>	/**
331	>	* getActiveCount increases but doesn't overestimate, when a
332	>	* thread becomes active
333	>	*/
334	>	public void testGetActiveCount() throws InterruptedException {
335	>	final CountDownLatch done = new CountDownLatch(1);
336	>	final ScheduledThreadPoolExecutor p = new ScheduledThreadPoolExecutor(2);
337	>	try (PoolCleaner cleaner = cleaner(p, done)) {
338	>	final CountDownLatch threadStarted = new CountDownLatch(1);
339	>	assertEquals(0, p.getActiveCount());
340	>	p.execute(new CheckedRunnable() {
341	>	public void realRun() throws InterruptedException {
342	>	threadStarted.countDown();
343	>	assertEquals(1, p.getActiveCount());
344	>	await(done);
345	>	}});
346	>	await(threadStarted);
347	>	assertEquals(1, p.getActiveCount());
348	>	}
349		}
350
351	<	private static long SHORT_DELAY_MS = 100;
352	<	private static long MEDIUM_DELAY_MS = 1000;
353	<	private static long LONG_DELAY_MS = 10000;
354	<
355	<	static class MyRunnable implements Runnable {
356	<	volatile boolean waiting = true;
357	<	volatile boolean done = false;
358	<	public void run(){
359	<	try{
360	<	Thread.sleep(MEDIUM_DELAY_MS);
361	<	waiting = false;
362	<	done = true;
363	<	} catch(Exception e){}
364	<	}
365	<	}
366	<
367	<	static class MyCallable implements Callable {
368	<	volatile boolean waiting = true;
369	<	volatile boolean done = false;
370	<	public Object call(){
371	<	try{
372	<	Thread.sleep(MEDIUM_DELAY_MS);
373	<	waiting = false;
374	<	done = true;
375	<	}catch(Exception e){}
376	<	return Boolean.TRUE;
377	<	}
378	<	}
379	<
380	<	/**
381	<	*  Test to verify execute successfully runs the given Runnable
382	<	*/
383	<	public void testExecute(){
384	<	try{
385	<	MyRunnable runnable =new MyRunnable();
386	<	ScheduledExecutor one = new ScheduledExecutor(1);
387	<	one.execute(runnable);
388	<	Thread.sleep(100);
389	<	assertTrue(runnable.waiting);
390	<	one.shutdown();
391	<	// make sure the Runnable has time to complete
392	<	try{Thread.sleep(1010);}catch(InterruptedException e){}
393	<	assertFalse(runnable.waiting);
394	<	assertTrue(runnable.done);
395	<	one.shutdown();
396	<	}
397	<	catch(Exception e){
398	<	fail("unexpected exception");
399	<	}
400	<	}
401	<
402	<	/**
403	<	*  Test to verify schedule successfully runs the given Callable.
404	<	*  The waiting flag shows that the Callable is not started until
405	<	*  immediately.
406	<	*/
407	<	public void testSchedule1(){
408	<	try{
409	<	MyCallable callable = new MyCallable();
410	<	ScheduledExecutor one = new ScheduledExecutor(1);
411	<	Future f = one.schedule(callable, 500, TimeUnit.MILLISECONDS);
412	<	//      Thread.sleep(505);
413	<	assertTrue(callable.waiting);
414	<	Thread.sleep(2000);
415	<	assertTrue(callable.done);
416	<	assertEquals(Boolean.TRUE, f.get());
417	<	one.shutdown();
418	<	}catch(RejectedExecutionException e){}
419	<	catch(Exception e){}
420	<	}
421	<
422	<	/**
423	<	*  Another version of schedule, only using Runnable instead of Callable
424	<	*/
425	<	public void testSchedule3(){
426	<	try{
427	<	MyRunnable runnable = new MyRunnable();
428	<	ScheduledExecutor one = new ScheduledExecutor(1);
429	<	one.schedule(runnable, 500, TimeUnit.MILLISECONDS);
430	<	Thread.sleep(50);
431	<	assertTrue(runnable.waiting);
432	<	Thread.sleep(2000);
433	<	assertTrue(runnable.done);
434	<	one.shutdown();
435	<	} catch(Exception e){
436	<	fail("unexpected exception");
437	<	}
438	<	}
439	<
440	<	/**
441	<	*  The final version of schedule, using both long, TimeUnit and Runnable
442	<	*/
443	<	public void testSchedule4(){
444	<	try{
445	<	MyRunnable runnable = new MyRunnable();
446	<	ScheduledExecutor one = new ScheduledExecutor(1);
447	<	one.schedule(runnable, 500, TimeUnit.MILLISECONDS);
448	<	//      Thread.sleep(505);
449	<	assertTrue(runnable.waiting);
450	<	Thread.sleep(2000);
451	<	assertTrue(runnable.done);
452	<	one.shutdown();
453	<	} catch(Exception e){
454	<	fail("unexpected exception");
455	<	}
456	<	}
457	<
458	<
459	<	// exception tests
460	<
461	<	/**
462	<	*  Test to verify schedule(Runnable, long) throws RejectedExecutionException
463	<	*  This occurs on an attempt to schedule a task on a shutdown executor
464	<	*/
465	<	public void testSchedule1_RejectedExecutionException(){
466	<	try{
467	<	ScheduledExecutor se = new ScheduledExecutor(1);
468	<	se.shutdown();
469	<	se.schedule(new Runnable(){
470	<	public void run(){}
471	<	}, 10000, TimeUnit.MILLISECONDS);
472	<	fail("shoud throw");
473	<	}catch(RejectedExecutionException e){}
474	<	}
475	<
476	<	/**
477	<	*  Test to verify schedule(Callable, long, TimeUnit) throws RejectedExecutionException
478	<	*  This occurs on an attempt to schedule a task on a shutdown executor
479	<	*/
480	<	public void testSchedule2_RejectedExecutionException(){
481	<	try{
482	<	ScheduledExecutor se = new ScheduledExecutor(1);
483	<	se.shutdown();
484	<	se.schedule(new Callable(){
485	<	public Object call(){
486	<	return Boolean.TRUE;
487	<	}
488	<	}, (long)100, TimeUnit.SECONDS);
489	<	fail("should throw");
490	<	}catch(RejectedExecutionException e){}
491	<	}
492	<
493	<	/**
494	<	*  Test to verify schedule(Callable, long) throws RejectedExecutionException
495	<	*  This occurs on an attempt to schedule a task on a shutdown executor
496	<	*/
497	<	public void testSchedule3_RejectedExecutionException(){
498	<	try{
499	<	ScheduledExecutor se = new ScheduledExecutor(1);
500	<	se.shutdown();
501	<	se.schedule(new Callable(){
502	<	public Object call(){
503	<	return Boolean.TRUE;
504	<	}
505	<	},  10000, TimeUnit.MILLISECONDS);
506	<	fail("should throw");
507	<	}catch(RejectedExecutionException e){}
508	<	}
509	<
510	<	/**
511	<	*  Test to verify scheduleAtFixedRate(Runnable, long, long, TimeUnit) throws
512	<	*  RejectedExecutionException.
513	<	*  This occurs on an attempt to schedule a task on a shutdown executor
514	<	*/
515	<	public void testScheduleAtFixedRate1_RejectedExecutionException(){
516	<	try{
517	<	ScheduledExecutor se = new ScheduledExecutor(1);
518	<	se.shutdown();
519	<	se.scheduleAtFixedRate(new Runnable(){
520	<	public void run(){}
521	<	}, 100, 100, TimeUnit.SECONDS);
522	<	fail("should throw");
523	<	}catch(RejectedExecutionException e){}
524	<	}
525	<
526	<	/**
527	<	*  Test to verify scheduleAtFixedRate(Runnable, long, long, TimeUnit) throws
528	<	*  RejectedExecutionException.
529	<	*  This occurs on an attempt to schedule a task on a shutdown executor
530	<	*/
531	<	public void testScheduleAtFixedRate2_RejectedExecutionException(){
532	<	try{
533	<	ScheduledExecutor se = new ScheduledExecutor(1);
534	<	se.shutdown();
535	<	se.scheduleAtFixedRate(new Runnable(){
536	<	public void run(){}
537	<	},  1, 100, TimeUnit.SECONDS);
538	<	fail("should throw");
539	<	}catch(RejectedExecutionException e){}
540	<	}
541	<
542	<	/**
543	<	*  Test to verify scheduleWithFixedDelay(Runnable, long, long, TimeUnit) throws
544	<	*  RejectedExecutionException.
545	<	*  This occurs on an attempt to schedule a task on a shutdown executor
546	<	*/
547	<	public void testScheduleWithFixedDelay1_RejectedExecutionException(){
548	<	try{
549	<	ScheduledExecutor se = new ScheduledExecutor(1);
550	<	se.shutdown();
551	<	se.scheduleWithFixedDelay(new Runnable(){
552	<	public void run(){}
553	<	}, 100, 100, TimeUnit.SECONDS);
554	<	fail("should throw");
555	<	}catch(RejectedExecutionException e){}
556	<	}
557	<
558	<	/**
559	<	*  Test to verify scheduleWithFixedDelay(Runnable, long, long, TimeUnit) throws
560	<	*  RejectedExecutionException.
561	<	*  This occurs on an attempt to schedule a task on a shutdown executor
562	<	*/
563	<	public void testScheduleWithFixedDelay2_RejectedExecutionException(){
564	<	try{
565	<	ScheduledExecutor se = new ScheduledExecutor(1);
566	<	se.shutdown();
567	<	se.scheduleWithFixedDelay(new Runnable(){
568	<	public void run(){}
569	<	},  1, 100, TimeUnit.SECONDS);
570	<	fail("should throw");
571	<	}catch(RejectedExecutionException e){}
572	<	}
573	<
574	<	/**
575	<	*  Test to verify execute throws RejectedExecutionException
576	<	*  This occurs on an attempt to schedule a task on a shutdown executor
577	<	*/
578	<	public void testExecute_RejectedExecutionException(){
579	<	try{
580	<	ScheduledExecutor se = new ScheduledExecutor(1);
581	<	se.shutdown();
582	<	se.execute(new Runnable(){
583	<	public void run(){}
584	<	});
585	<	fail("should throw");
586	<	}catch(RejectedExecutionException e){}
351	>	/**
352	>	* getCompletedTaskCount increases, but doesn't overestimate,
353	>	* when tasks complete
354	>	*/
355	>	public void testGetCompletedTaskCount() throws InterruptedException {
356	>	final ThreadPoolExecutor p = new ScheduledThreadPoolExecutor(2);
357	>	try (PoolCleaner cleaner = cleaner(p)) {
358	>	final CountDownLatch threadStarted = new CountDownLatch(1);
359	>	final CountDownLatch threadProceed = new CountDownLatch(1);
360	>	final CountDownLatch threadDone = new CountDownLatch(1);
361	>	assertEquals(0, p.getCompletedTaskCount());
362	>	p.execute(new CheckedRunnable() {
363	>	public void realRun() throws InterruptedException {
364	>	threadStarted.countDown();
365	>	assertEquals(0, p.getCompletedTaskCount());
366	>	await(threadProceed);
367	>	threadDone.countDown();
368	>	}});
369	>	await(threadStarted);
370	>	assertEquals(0, p.getCompletedTaskCount());
371	>	threadProceed.countDown();
372	>	await(threadDone);
373	>	long startTime = System.nanoTime();
374	>	while (p.getCompletedTaskCount() != 1) {
375	>	if (millisElapsedSince(startTime) > LONG_DELAY_MS)
376	>	fail("timed out");
377	>	Thread.yield();
378	>	}
379	>	}
380	>	}
381	>
382	>	/**
383	>	* getCorePoolSize returns size given in constructor if not otherwise set
384	>	*/
385	>	public void testGetCorePoolSize() throws InterruptedException {
386	>	ThreadPoolExecutor p = new ScheduledThreadPoolExecutor(1);
387	>	try (PoolCleaner cleaner = cleaner(p)) {
388	>	assertEquals(1, p.getCorePoolSize());
389	>	}
390	>	}
391	>
392	>	/**
393	>	* getLargestPoolSize increases, but doesn't overestimate, when
394	>	* multiple threads active
395	>	*/
396	>	public void testGetLargestPoolSize() throws InterruptedException {
397	>	final int THREADS = 3;
398	>	final ThreadPoolExecutor p = new ScheduledThreadPoolExecutor(THREADS);
399	>	final CountDownLatch threadsStarted = new CountDownLatch(THREADS);
400	>	final CountDownLatch done = new CountDownLatch(1);
401	>	try (PoolCleaner cleaner = cleaner(p, done)) {
402	>	assertEquals(0, p.getLargestPoolSize());
403	>	for (int i = 0; i < THREADS; i++)
404	>	p.execute(new CheckedRunnable() {
405	>	public void realRun() throws InterruptedException {
406	>	threadsStarted.countDown();
407	>	await(done);
408	>	assertEquals(THREADS, p.getLargestPoolSize());
409	>	}});
410	>	await(threadsStarted);
411	>	assertEquals(THREADS, p.getLargestPoolSize());
412	>	}
413	>	assertEquals(THREADS, p.getLargestPoolSize());
414	>	}
415	>
416	>	/**
417	>	* getPoolSize increases, but doesn't overestimate, when threads
418	>	* become active
419	>	*/
420	>	public void testGetPoolSize() throws InterruptedException {
421	>	final ThreadPoolExecutor p = new ScheduledThreadPoolExecutor(1);
422	>	final CountDownLatch threadStarted = new CountDownLatch(1);
423	>	final CountDownLatch done = new CountDownLatch(1);
424	>	try (PoolCleaner cleaner = cleaner(p, done)) {
425	>	assertEquals(0, p.getPoolSize());
426	>	p.execute(new CheckedRunnable() {
427	>	public void realRun() throws InterruptedException {
428	>	threadStarted.countDown();
429	>	assertEquals(1, p.getPoolSize());
430	>	await(done);
431	>	}});
432	>	await(threadStarted);
433	>	assertEquals(1, p.getPoolSize());
434	>	}
435	>	}
436	>
437	>	/**
438	>	* getTaskCount increases, but doesn't overestimate, when tasks
439	>	* submitted
440	>	*/
441	>	public void testGetTaskCount() throws InterruptedException {
442	>	final int TASKS = 3;
443	>	final CountDownLatch done = new CountDownLatch(1);
444	>	final ThreadPoolExecutor p = new ScheduledThreadPoolExecutor(1);
445	>	try (PoolCleaner cleaner = cleaner(p, done)) {
446	>	final CountDownLatch threadStarted = new CountDownLatch(1);
447	>	assertEquals(0, p.getTaskCount());
448	>	assertEquals(0, p.getCompletedTaskCount());
449	>	p.execute(new CheckedRunnable() {
450	>	public void realRun() throws InterruptedException {
451	>	threadStarted.countDown();
452	>	await(done);
453	>	}});
454	>	await(threadStarted);
455	>	assertEquals(1, p.getTaskCount());
456	>	assertEquals(0, p.getCompletedTaskCount());
457	>	for (int i = 0; i < TASKS; i++) {
458	>	assertEquals(1 + i, p.getTaskCount());
459	>	p.execute(new CheckedRunnable() {
460	>	public void realRun() throws InterruptedException {
461	>	threadStarted.countDown();
462	>	assertEquals(1 + TASKS, p.getTaskCount());
463	>	await(done);
464	>	}});
465	>	}
466	>	assertEquals(1 + TASKS, p.getTaskCount());
467	>	assertEquals(0, p.getCompletedTaskCount());
468	>	}
469	>	assertEquals(1 + TASKS, p.getTaskCount());
470	>	assertEquals(1 + TASKS, p.getCompletedTaskCount());
471	>	}
472	>
473	>	/**
474	>	* getThreadFactory returns factory in constructor if not set
475	>	*/
476	>	public void testGetThreadFactory() throws InterruptedException {
477	>	final ThreadFactory threadFactory = new SimpleThreadFactory();
478	>	final ScheduledThreadPoolExecutor p =
479	>	new ScheduledThreadPoolExecutor(1, threadFactory);
480	>	try (PoolCleaner cleaner = cleaner(p)) {
481	>	assertSame(threadFactory, p.getThreadFactory());
482	>	}
483	>	}
484	>
485	>	/**
486	>	* setThreadFactory sets the thread factory returned by getThreadFactory
487	>	*/
488	>	public void testSetThreadFactory() throws InterruptedException {
489	>	ThreadFactory threadFactory = new SimpleThreadFactory();
490	>	final ScheduledThreadPoolExecutor p = new ScheduledThreadPoolExecutor(1);
491	>	try (PoolCleaner cleaner = cleaner(p)) {
492	>	p.setThreadFactory(threadFactory);
493	>	assertSame(threadFactory, p.getThreadFactory());
494	>	}
495	>	}
496	>
497	>	/**
498	>	* setThreadFactory(null) throws NPE
499	>	*/
500	>	public void testSetThreadFactoryNull() throws InterruptedException {
501	>	final ScheduledThreadPoolExecutor p = new ScheduledThreadPoolExecutor(1);
502	>	try (PoolCleaner cleaner = cleaner(p)) {
503	>	try {
504	>	p.setThreadFactory(null);
505	>	shouldThrow();
506	>	} catch (NullPointerException success) {}
507	>	}
508	>	}
509	>
510	>	/**
511	>	* The default rejected execution handler is AbortPolicy.
512	>	*/
513	>	public void testDefaultRejectedExecutionHandler() {
514	>	final ScheduledThreadPoolExecutor p = new ScheduledThreadPoolExecutor(1);
515	>	try (PoolCleaner cleaner = cleaner(p)) {
516	>	assertTrue(p.getRejectedExecutionHandler()
517	>	instanceof ThreadPoolExecutor.AbortPolicy);
518	>	}
519	>	}
520	>
521	>	/**
522	>	* isShutdown is false before shutdown, true after
523	>	*/
524	>	public void testIsShutdown() {
525	>	final ScheduledThreadPoolExecutor p = new ScheduledThreadPoolExecutor(1);
526	>	assertFalse(p.isShutdown());
527	>	try (PoolCleaner cleaner = cleaner(p)) {
528	>	try {
529	>	p.shutdown();
530	>	assertTrue(p.isShutdown());
531	>	} catch (SecurityException ok) {}
532	>	}
533	>	}
534	>
535	>	/**
536	>	* isTerminated is false before termination, true after
537	>	*/
538	>	public void testIsTerminated() throws InterruptedException {
539	>	final ThreadPoolExecutor p = new ScheduledThreadPoolExecutor(1);
540	>	try (PoolCleaner cleaner = cleaner(p)) {
541	>	final CountDownLatch threadStarted = new CountDownLatch(1);
542	>	final CountDownLatch done = new CountDownLatch(1);
543	>	assertFalse(p.isTerminated());
544	>	p.execute(new CheckedRunnable() {
545	>	public void realRun() throws InterruptedException {
546	>	assertFalse(p.isTerminated());
547	>	threadStarted.countDown();
548	>	await(done);
549	>	}});
550	>	await(threadStarted);
551	>	assertFalse(p.isTerminating());
552	>	done.countDown();
553	>	try { p.shutdown(); } catch (SecurityException ok) { return; }
554	>	assertTrue(p.awaitTermination(LONG_DELAY_MS, MILLISECONDS));
555	>	assertTrue(p.isTerminated());
556	>	}
557	>	}
558	>
559	>	/**
560	>	* isTerminating is not true when running or when terminated
561	>	*/
562	>	public void testIsTerminating() throws InterruptedException {
563	>	final ThreadPoolExecutor p = new ScheduledThreadPoolExecutor(1);
564	>	final CountDownLatch threadStarted = new CountDownLatch(1);
565	>	final CountDownLatch done = new CountDownLatch(1);
566	>	try (PoolCleaner cleaner = cleaner(p)) {
567	>	assertFalse(p.isTerminating());
568	>	p.execute(new CheckedRunnable() {
569	>	public void realRun() throws InterruptedException {
570	>	assertFalse(p.isTerminating());
571	>	threadStarted.countDown();
572	>	await(done);
573	>	}});
574	>	await(threadStarted);
575	>	assertFalse(p.isTerminating());
576	>	done.countDown();
577	>	try { p.shutdown(); } catch (SecurityException ok) { return; }
578	>	assertTrue(p.awaitTermination(LONG_DELAY_MS, MILLISECONDS));
579	>	assertTrue(p.isTerminated());
580	>	assertFalse(p.isTerminating());
581	>	}
582	>	}
583	>
584	>	/**
585	>	* getQueue returns the work queue, which contains queued tasks
586	>	*/
587	>	public void testGetQueue() throws InterruptedException {
588	>	final CountDownLatch done = new CountDownLatch(1);
589	>	final ScheduledThreadPoolExecutor p = new ScheduledThreadPoolExecutor(1);
590	>	try (PoolCleaner cleaner = cleaner(p, done)) {
591	>	final CountDownLatch threadStarted = new CountDownLatch(1);
592	>	ScheduledFuture[] tasks = new ScheduledFuture[5];
593	>	for (int i = 0; i < tasks.length; i++) {
594	>	Runnable r = new CheckedRunnable() {
595	>	public void realRun() throws InterruptedException {
596	>	threadStarted.countDown();
597	>	await(done);
598	>	}};
599	>	tasks[i] = p.schedule(r, 1, MILLISECONDS);
600	>	}
601	>	await(threadStarted);
602	>	BlockingQueue<Runnable> q = p.getQueue();
603	>	assertTrue(q.contains(tasks[tasks.length - 1]));
604	>	assertFalse(q.contains(tasks[0]));
605	>	}
606	>	}
607	>
608	>	/**
609	>	* remove(task) removes queued task, and fails to remove active task
610	>	*/
611	>	public void testRemove() throws InterruptedException {
612	>	final CountDownLatch done = new CountDownLatch(1);
613	>	final ScheduledThreadPoolExecutor p = new ScheduledThreadPoolExecutor(1);
614	>	try (PoolCleaner cleaner = cleaner(p, done)) {
615	>	ScheduledFuture[] tasks = new ScheduledFuture[5];
616	>	final CountDownLatch threadStarted = new CountDownLatch(1);
617	>	for (int i = 0; i < tasks.length; i++) {
618	>	Runnable r = new CheckedRunnable() {
619	>	public void realRun() throws InterruptedException {
620	>	threadStarted.countDown();
621	>	await(done);
622	>	}};
623	>	tasks[i] = p.schedule(r, 1, MILLISECONDS);
624	>	}
625	>	await(threadStarted);
626	>	BlockingQueue<Runnable> q = p.getQueue();
627	>	assertFalse(p.remove((Runnable)tasks[0]));
628	>	assertTrue(q.contains((Runnable)tasks[4]));
629	>	assertTrue(q.contains((Runnable)tasks[3]));
630	>	assertTrue(p.remove((Runnable)tasks[4]));
631	>	assertFalse(p.remove((Runnable)tasks[4]));
632	>	assertFalse(q.contains((Runnable)tasks[4]));
633	>	assertTrue(q.contains((Runnable)tasks[3]));
634	>	assertTrue(p.remove((Runnable)tasks[3]));
635	>	assertFalse(q.contains((Runnable)tasks[3]));
636	>	}
637	>	}
638	>
639	>	/**
640	>	* purge eventually removes cancelled tasks from the queue
641	>	*/
642	>	public void testPurge() throws InterruptedException {
643	>	final ScheduledFuture[] tasks = new ScheduledFuture[5];
644	>	final Runnable releaser = new Runnable() { public void run() {
645	>	for (ScheduledFuture task : tasks)
646	>	if (task != null) task.cancel(true); }};
647	>	final ScheduledThreadPoolExecutor p = new ScheduledThreadPoolExecutor(1);
648	>	try (PoolCleaner cleaner = cleaner(p, releaser)) {
649	>	for (int i = 0; i < tasks.length; i++)
650	>	tasks[i] = p.schedule(new SmallPossiblyInterruptedRunnable(),
651	>	LONG_DELAY_MS, MILLISECONDS);
652	>	int max = tasks.length;
653	>	if (tasks[4].cancel(true)) --max;
654	>	if (tasks[3].cancel(true)) --max;
655	>	// There must eventually be an interference-free point at
656	>	// which purge will not fail. (At worst, when queue is empty.)
657	>	long startTime = System.nanoTime();
658	>	do {
659	>	p.purge();
660	>	long count = p.getTaskCount();
661	>	if (count == max)
662	>	return;
663	>	} while (millisElapsedSince(startTime) < LONG_DELAY_MS);
664	>	fail("Purge failed to remove cancelled tasks");
665	>	}
666	>	}
667	>
668	>	/**
669	>	* shutdownNow returns a list containing tasks that were not run,
670	>	* and those tasks are drained from the queue
671	>	*/
672	>	public void testShutdownNow() throws InterruptedException {
673	>	final int poolSize = 2;
674	>	final int count = 5;
675	>	final AtomicInteger ran = new AtomicInteger(0);
676	>	final ScheduledThreadPoolExecutor p =
677	>	new ScheduledThreadPoolExecutor(poolSize);
678	>	final CountDownLatch threadsStarted = new CountDownLatch(poolSize);
679	>	Runnable waiter = new CheckedRunnable() { public void realRun() {
680	>	threadsStarted.countDown();
681	>	try {
682	>	MILLISECONDS.sleep(2 * LONG_DELAY_MS);
683	>	} catch (InterruptedException success) {}
684	>	ran.getAndIncrement();
685	>	}};
686	>	for (int i = 0; i < count; i++)
687	>	p.execute(waiter);
688	>	await(threadsStarted);
689	>	assertEquals(poolSize, p.getActiveCount());
690	>	assertEquals(0, p.getCompletedTaskCount());
691	>	final List<Runnable> queuedTasks;
692	>	try {
693	>	queuedTasks = p.shutdownNow();
694	>	} catch (SecurityException ok) {
695	>	return; // Allowed in case test doesn't have privs
696	>	}
697	>	assertTrue(p.isShutdown());
698	>	assertTrue(p.getQueue().isEmpty());
699	>	assertEquals(count - poolSize, queuedTasks.size());
700	>	assertTrue(p.awaitTermination(LONG_DELAY_MS, MILLISECONDS));
701	>	assertTrue(p.isTerminated());
702	>	assertEquals(poolSize, ran.get());
703	>	assertEquals(poolSize, p.getCompletedTaskCount());
704	>	}
705	>
706	>	/**
707	>	* shutdownNow returns a list containing tasks that were not run,
708	>	* and those tasks are drained from the queue
709	>	*/
710	>	public void testShutdownNow_delayedTasks() throws InterruptedException {
711	>	final ScheduledThreadPoolExecutor p = new ScheduledThreadPoolExecutor(1);
712	>	List<ScheduledFuture> tasks = new ArrayList<>();
713	>	for (int i = 0; i < 3; i++) {
714	>	Runnable r = new NoOpRunnable();
715	>	tasks.add(p.schedule(r, 9, SECONDS));
716	>	tasks.add(p.scheduleAtFixedRate(r, 9, 9, SECONDS));
717	>	tasks.add(p.scheduleWithFixedDelay(r, 9, 9, SECONDS));
718	>	}
719	>	if (testImplementationDetails)
720	>	assertEquals(new HashSet(tasks), new HashSet(p.getQueue()));
721	>	final List<Runnable> queuedTasks;
722	>	try {
723	>	queuedTasks = p.shutdownNow();
724	>	} catch (SecurityException ok) {
725	>	return; // Allowed in case test doesn't have privs
726	>	}
727	>	assertTrue(p.isShutdown());
728	>	assertTrue(p.getQueue().isEmpty());
729	>	if (testImplementationDetails)
730	>	assertEquals(new HashSet(tasks), new HashSet(queuedTasks));
731	>	assertEquals(tasks.size(), queuedTasks.size());
732	>	for (ScheduledFuture task : tasks) {
733	>	assertFalse(task.isDone());
734	>	assertFalse(task.isCancelled());
735	>	}
736	>	assertTrue(p.awaitTermination(LONG_DELAY_MS, MILLISECONDS));
737	>	assertTrue(p.isTerminated());
738	>	}
739	>
740	>	/**
741	>	* By default, periodic tasks are cancelled at shutdown.
742	>	* By default, delayed tasks keep running after shutdown.
743	>	* Check that changing the default values work:
744	>	* - setExecuteExistingDelayedTasksAfterShutdownPolicy
745	>	* - setContinueExistingPeriodicTasksAfterShutdownPolicy
746	>	*/
747	>	public void testShutdown_cancellation() throws Exception {
748	>	final int poolSize = 2;
749	>	final ScheduledThreadPoolExecutor p
750	>	= new ScheduledThreadPoolExecutor(poolSize);
751	>	final ThreadLocalRandom rnd = ThreadLocalRandom.current();
752	>	final boolean effectiveDelayedPolicy;
753	>	final boolean effectivePeriodicPolicy;
754	>	final boolean effectiveRemovePolicy;
755	>
756	>	if (rnd.nextBoolean())
757	>	p.setExecuteExistingDelayedTasksAfterShutdownPolicy(
758	>	effectiveDelayedPolicy = rnd.nextBoolean());
759	>	else
760	>	effectiveDelayedPolicy = true;
761	>	assertEquals(effectiveDelayedPolicy,
762	>	p.getExecuteExistingDelayedTasksAfterShutdownPolicy());
763	>
764	>	if (rnd.nextBoolean())
765	>	p.setContinueExistingPeriodicTasksAfterShutdownPolicy(
766	>	effectivePeriodicPolicy = rnd.nextBoolean());
767	>	else
768	>	effectivePeriodicPolicy = false;
769	>	assertEquals(effectivePeriodicPolicy,
770	>	p.getContinueExistingPeriodicTasksAfterShutdownPolicy());
771	>
772	>	if (rnd.nextBoolean())
773	>	p.setRemoveOnCancelPolicy(
774	>	effectiveRemovePolicy = rnd.nextBoolean());
775	>	else
776	>	effectiveRemovePolicy = false;
777	>	assertEquals(effectiveRemovePolicy,
778	>	p.getRemoveOnCancelPolicy());
779	>
780	>	// Strategy: Wedge the pool with poolSize "blocker" threads
781	>	final AtomicInteger ran = new AtomicInteger(0);
782	>	final CountDownLatch poolBlocked = new CountDownLatch(poolSize);
783	>	final CountDownLatch unblock = new CountDownLatch(1);
784	>	final CountDownLatch periodicLatch1 = new CountDownLatch(2);
785	>	final CountDownLatch periodicLatch2 = new CountDownLatch(2);
786	>	Runnable task = new CheckedRunnable() { public void realRun()
787	>	throws InterruptedException {
788	>	poolBlocked.countDown();
789	>	await(unblock);
790	>	ran.getAndIncrement();
791	>	}};
792	>	List<Future<?>> blockers = new ArrayList<>();
793	>	List<Future<?>> periodics = new ArrayList<>();
794	>	List<Future<?>> delayeds = new ArrayList<>();
795	>	for (int i = 0; i < poolSize; i++)
796	>	blockers.add(p.submit(task));
797	>	await(poolBlocked);
798	>
799	>	periodics.add(p.scheduleAtFixedRate(
800	>	countDowner(periodicLatch1), 1, 1, MILLISECONDS));
801	>	periodics.add(p.scheduleWithFixedDelay(
802	>	countDowner(periodicLatch2), 1, 1, MILLISECONDS));
803	>	delayeds.add(p.schedule(task, 1, MILLISECONDS));
804	>
805	>	assertTrue(p.getQueue().containsAll(periodics));
806	>	assertTrue(p.getQueue().containsAll(delayeds));
807	>	try { p.shutdown(); } catch (SecurityException ok) { return; }
808	>	assertTrue(p.isShutdown());
809	>	assertFalse(p.isTerminated());
810	>	for (Future<?> periodic : periodics) {
811	>	assertTrue(effectivePeriodicPolicy ^ periodic.isCancelled());
812	>	assertTrue(effectivePeriodicPolicy ^ periodic.isDone());
813	>	}
814	>	for (Future<?> delayed : delayeds) {
815	>	assertTrue(effectiveDelayedPolicy ^ delayed.isCancelled());
816	>	assertTrue(effectiveDelayedPolicy ^ delayed.isDone());
817	>	}
818	>	if (testImplementationDetails) {
819	>	assertEquals(effectivePeriodicPolicy,
820	>	p.getQueue().containsAll(periodics));
821	>	assertEquals(effectiveDelayedPolicy,
822	>	p.getQueue().containsAll(delayeds));
823	>	}
824	>	unblock.countDown();    // Release all pool threads
825	>
826	>	if (effectiveDelayedPolicy)
827	>	for (Future<?> delayed : delayeds) assertNull(delayed.get());
828	>	if (effectivePeriodicPolicy) {
829	>	await(periodicLatch1);
830	>	await(periodicLatch2);
831	>	for (Future<?> periodic : periodics) {
832	>	assertTrue(periodic.cancel(false));
833	>	assertTrue(periodic.isCancelled());
834	>	assertTrue(periodic.isDone());
835	>	}
836	>	}
837	>	for (Future<?> blocker : blockers) assertNull(blocker.get());
838	>	assertTrue(p.awaitTermination(LONG_DELAY_MS, MILLISECONDS));
839	>	assertTrue(p.isTerminated());
840	>
841	>	for (Future<?> future : delayeds) {
842	>	assertTrue(effectiveDelayedPolicy ^ future.isCancelled());
843	>	assertTrue(future.isDone());
844	>	}
845	>	for (Future<?> future : periodics)
846	>	assertTrue(future.isCancelled());
847	>	for (Future<?> future : blockers)
848	>	assertNull(future.get());
849	>	assertEquals(2 + (effectiveDelayedPolicy ? 1 : 0), ran.get());
850	>	}
851	>
852	>	/**
853	>	* completed submit of callable returns result
854	>	*/
855	>	public void testSubmitCallable() throws Exception {
856	>	final ExecutorService e = new ScheduledThreadPoolExecutor(2);
857	>	try (PoolCleaner cleaner = cleaner(e)) {
858	>	Future<String> future = e.submit(new StringTask());
859	>	String result = future.get();
860	>	assertSame(TEST_STRING, result);
861	>	}
862	>	}
863	>
864	>	/**
865	>	* completed submit of runnable returns successfully
866	>	*/
867	>	public void testSubmitRunnable() throws Exception {
868	>	final ExecutorService e = new ScheduledThreadPoolExecutor(2);
869	>	try (PoolCleaner cleaner = cleaner(e)) {
870	>	Future<?> future = e.submit(new NoOpRunnable());
871	>	future.get();
872	>	assertTrue(future.isDone());
873	>	}
874	>	}
875	>
876	>	/**
877	>	* completed submit of (runnable, result) returns result
878	>	*/
879	>	public void testSubmitRunnable2() throws Exception {
880	>	final ExecutorService e = new ScheduledThreadPoolExecutor(2);
881	>	try (PoolCleaner cleaner = cleaner(e)) {
882	>	Future<String> future = e.submit(new NoOpRunnable(), TEST_STRING);
883	>	String result = future.get();
884	>	assertSame(TEST_STRING, result);
885	>	}
886	>	}
887	>
888	>	/**
889	>	* invokeAny(null) throws NPE
890	>	*/
891	>	public void testInvokeAny1() throws Exception {
892	>	final ExecutorService e = new ScheduledThreadPoolExecutor(2);
893	>	try (PoolCleaner cleaner = cleaner(e)) {
894	>	try {
895	>	e.invokeAny(null);
896	>	shouldThrow();
897	>	} catch (NullPointerException success) {}
898	>	}
899	>	}
900	>
901	>	/**
902	>	* invokeAny(empty collection) throws IAE
903	>	*/
904	>	public void testInvokeAny2() throws Exception {
905	>	final ExecutorService e = new ScheduledThreadPoolExecutor(2);
906	>	try (PoolCleaner cleaner = cleaner(e)) {
907	>	try {
908	>	e.invokeAny(new ArrayList<Callable<String>>());
909	>	shouldThrow();
910	>	} catch (IllegalArgumentException success) {}
911	>	}
912	>	}
913	>
914	>	/**
915	>	* invokeAny(c) throws NPE if c has null elements
916	>	*/
917	>	public void testInvokeAny3() throws Exception {
918	>	CountDownLatch latch = new CountDownLatch(1);
919	>	final ExecutorService e = new ScheduledThreadPoolExecutor(2);
920	>	try (PoolCleaner cleaner = cleaner(e)) {
921	>	List<Callable<String>> l = new ArrayList<>();
922	>	l.add(latchAwaitingStringTask(latch));
923	>	l.add(null);
924	>	try {
925	>	e.invokeAny(l);
926	>	shouldThrow();
927	>	} catch (NullPointerException success) {}
928	>	latch.countDown();
929	>	}
930	>	}
931	>
932	>	/**
933	>	* invokeAny(c) throws ExecutionException if no task completes
934	>	*/
935	>	public void testInvokeAny4() throws Exception {
936	>	final ExecutorService e = new ScheduledThreadPoolExecutor(2);
937	>	try (PoolCleaner cleaner = cleaner(e)) {
938	>	List<Callable<String>> l = new ArrayList<>();
939	>	l.add(new NPETask());
940	>	try {
941	>	e.invokeAny(l);
942	>	shouldThrow();
943	>	} catch (ExecutionException success) {
944	>	assertTrue(success.getCause() instanceof NullPointerException);
945	>	}
946	>	}
947	>	}
948	>
949	>	/**
950	>	* invokeAny(c) returns result of some task
951	>	*/
952	>	public void testInvokeAny5() throws Exception {
953	>	final ExecutorService e = new ScheduledThreadPoolExecutor(2);
954	>	try (PoolCleaner cleaner = cleaner(e)) {
955	>	List<Callable<String>> l = new ArrayList<>();
956	>	l.add(new StringTask());
957	>	l.add(new StringTask());
958	>	String result = e.invokeAny(l);
959	>	assertSame(TEST_STRING, result);
960	>	}
961	>	}
962	>
963	>	/**
964	>	* invokeAll(null) throws NPE
965	>	*/
966	>	public void testInvokeAll1() throws Exception {
967	>	final ExecutorService e = new ScheduledThreadPoolExecutor(2);
968	>	try (PoolCleaner cleaner = cleaner(e)) {
969	>	try {
970	>	e.invokeAll(null);
971	>	shouldThrow();
972	>	} catch (NullPointerException success) {}
973	>	}
974	>	}
975	>
976	>	/**
977	>	* invokeAll(empty collection) returns empty collection
978	>	*/
979	>	public void testInvokeAll2() throws Exception {
980	>	final ExecutorService e = new ScheduledThreadPoolExecutor(2);
981	>	try (PoolCleaner cleaner = cleaner(e)) {
982	>	List<Future<String>> r = e.invokeAll(new ArrayList<Callable<String>>());
983	>	assertTrue(r.isEmpty());
984	>	}
985	>	}
986	>
987	>	/**
988	>	* invokeAll(c) throws NPE if c has null elements
989	>	*/
990	>	public void testInvokeAll3() throws Exception {
991	>	final ExecutorService e = new ScheduledThreadPoolExecutor(2);
992	>	try (PoolCleaner cleaner = cleaner(e)) {
993	>	List<Callable<String>> l = new ArrayList<>();
994	>	l.add(new StringTask());
995	>	l.add(null);
996	>	try {
997	>	e.invokeAll(l);
998	>	shouldThrow();
999	>	} catch (NullPointerException success) {}
1000	>	}
1001	>	}
1002	>
1003	>	/**
1004	>	* get of invokeAll(c) throws exception on failed task
1005	>	*/
1006	>	public void testInvokeAll4() throws Exception {
1007	>	final ExecutorService e = new ScheduledThreadPoolExecutor(2);
1008	>	try (PoolCleaner cleaner = cleaner(e)) {
1009	>	List<Callable<String>> l = new ArrayList<>();
1010	>	l.add(new NPETask());
1011	>	List<Future<String>> futures = e.invokeAll(l);
1012	>	assertEquals(1, futures.size());
1013	>	try {
1014	>	futures.get(0).get();
1015	>	shouldThrow();
1016	>	} catch (ExecutionException success) {
1017	>	assertTrue(success.getCause() instanceof NullPointerException);
1018	>	}
1019	>	}
1020	>	}
1021	>
1022	>	/**
1023	>	* invokeAll(c) returns results of all completed tasks
1024	>	*/
1025	>	public void testInvokeAll5() throws Exception {
1026	>	final ExecutorService e = new ScheduledThreadPoolExecutor(2);
1027	>	try (PoolCleaner cleaner = cleaner(e)) {
1028	>	List<Callable<String>> l = new ArrayList<>();
1029	>	l.add(new StringTask());
1030	>	l.add(new StringTask());
1031	>	List<Future<String>> futures = e.invokeAll(l);
1032	>	assertEquals(2, futures.size());
1033	>	for (Future<String> future : futures)
1034	>	assertSame(TEST_STRING, future.get());
1035	>	}
1036	>	}
1037	>
1038	>	/**
1039	>	* timed invokeAny(null) throws NPE
1040	>	*/
1041	>	public void testTimedInvokeAny1() throws Exception {
1042	>	final ExecutorService e = new ScheduledThreadPoolExecutor(2);
1043	>	try (PoolCleaner cleaner = cleaner(e)) {
1044	>	try {
1045	>	e.invokeAny(null, MEDIUM_DELAY_MS, MILLISECONDS);
1046	>	shouldThrow();
1047	>	} catch (NullPointerException success) {}
1048	>	}
1049	>	}
1050	>
1051	>	/**
1052	>	* timed invokeAny(,,null) throws NPE
1053	>	*/
1054	>	public void testTimedInvokeAnyNullTimeUnit() throws Exception {
1055	>	final ExecutorService e = new ScheduledThreadPoolExecutor(2);
1056	>	try (PoolCleaner cleaner = cleaner(e)) {
1057	>	List<Callable<String>> l = new ArrayList<>();
1058	>	l.add(new StringTask());
1059	>	try {
1060	>	e.invokeAny(l, MEDIUM_DELAY_MS, null);
1061	>	shouldThrow();
1062	>	} catch (NullPointerException success) {}
1063	>	}
1064	>	}
1065	>
1066	>	/**
1067	>	* timed invokeAny(empty collection) throws IAE
1068	>	*/
1069	>	public void testTimedInvokeAny2() throws Exception {
1070	>	final ExecutorService e = new ScheduledThreadPoolExecutor(2);
1071	>	try (PoolCleaner cleaner = cleaner(e)) {
1072	>	try {
1073	>	e.invokeAny(new ArrayList<Callable<String>>(), MEDIUM_DELAY_MS, MILLISECONDS);
1074	>	shouldThrow();
1075	>	} catch (IllegalArgumentException success) {}
1076	>	}
1077	>	}
1078	>
1079	>	/**
1080	>	* timed invokeAny(c) throws NPE if c has null elements
1081	>	*/
1082	>	public void testTimedInvokeAny3() throws Exception {
1083	>	CountDownLatch latch = new CountDownLatch(1);
1084	>	final ExecutorService e = new ScheduledThreadPoolExecutor(2);
1085	>	try (PoolCleaner cleaner = cleaner(e)) {
1086	>	List<Callable<String>> l = new ArrayList<>();
1087	>	l.add(latchAwaitingStringTask(latch));
1088	>	l.add(null);
1089	>	try {
1090	>	e.invokeAny(l, MEDIUM_DELAY_MS, MILLISECONDS);
1091	>	shouldThrow();
1092	>	} catch (NullPointerException success) {}
1093	>	latch.countDown();
1094	>	}
1095	>	}
1096	>
1097	>	/**
1098	>	* timed invokeAny(c) throws ExecutionException if no task completes
1099	>	*/
1100	>	public void testTimedInvokeAny4() throws Exception {
1101	>	final ExecutorService e = new ScheduledThreadPoolExecutor(2);
1102	>	try (PoolCleaner cleaner = cleaner(e)) {
1103	>	long startTime = System.nanoTime();
1104	>	List<Callable<String>> l = new ArrayList<>();
1105	>	l.add(new NPETask());
1106	>	try {
1107	>	e.invokeAny(l, LONG_DELAY_MS, MILLISECONDS);
1108	>	shouldThrow();
1109	>	} catch (ExecutionException success) {
1110	>	assertTrue(success.getCause() instanceof NullPointerException);
1111	>	}
1112	>	assertTrue(millisElapsedSince(startTime) < LONG_DELAY_MS);
1113	>	}
1114	>	}
1115	>
1116	>	/**
1117	>	* timed invokeAny(c) returns result of some task
1118	>	*/
1119	>	public void testTimedInvokeAny5() throws Exception {
1120	>	final ExecutorService e = new ScheduledThreadPoolExecutor(2);
1121	>	try (PoolCleaner cleaner = cleaner(e)) {
1122	>	long startTime = System.nanoTime();
1123	>	List<Callable<String>> l = new ArrayList<>();
1124	>	l.add(new StringTask());
1125	>	l.add(new StringTask());
1126	>	String result = e.invokeAny(l, LONG_DELAY_MS, MILLISECONDS);
1127	>	assertSame(TEST_STRING, result);
1128	>	assertTrue(millisElapsedSince(startTime) < LONG_DELAY_MS);
1129	>	}
1130	>	}
1131	>
1132	>	/**
1133	>	* timed invokeAll(null) throws NPE
1134	>	*/
1135	>	public void testTimedInvokeAll1() throws Exception {
1136	>	final ExecutorService e = new ScheduledThreadPoolExecutor(2);
1137	>	try (PoolCleaner cleaner = cleaner(e)) {
1138	>	try {
1139	>	e.invokeAll(null, MEDIUM_DELAY_MS, MILLISECONDS);
1140	>	shouldThrow();
1141	>	} catch (NullPointerException success) {}
1142	>	}
1143	>	}
1144	>
1145	>	/**
1146	>	* timed invokeAll(,,null) throws NPE
1147	>	*/
1148	>	public void testTimedInvokeAllNullTimeUnit() throws Exception {
1149	>	final ExecutorService e = new ScheduledThreadPoolExecutor(2);
1150	>	try (PoolCleaner cleaner = cleaner(e)) {
1151	>	List<Callable<String>> l = new ArrayList<>();
1152	>	l.add(new StringTask());
1153	>	try {
1154	>	e.invokeAll(l, MEDIUM_DELAY_MS, null);
1155	>	shouldThrow();
1156	>	} catch (NullPointerException success) {}
1157	>	}
1158	>	}
1159	>
1160	>	/**
1161	>	* timed invokeAll(empty collection) returns empty collection
1162	>	*/
1163	>	public void testTimedInvokeAll2() throws Exception {
1164	>	final ExecutorService e = new ScheduledThreadPoolExecutor(2);
1165	>	try (PoolCleaner cleaner = cleaner(e)) {
1166	>	List<Future<String>> r = e.invokeAll(new ArrayList<Callable<String>>(),
1167	>	MEDIUM_DELAY_MS, MILLISECONDS);
1168	>	assertTrue(r.isEmpty());
1169	>	}
1170	>	}
1171	>
1172	>	/**
1173	>	* timed invokeAll(c) throws NPE if c has null elements
1174	>	*/
1175	>	public void testTimedInvokeAll3() throws Exception {
1176	>	final ExecutorService e = new ScheduledThreadPoolExecutor(2);
1177	>	try (PoolCleaner cleaner = cleaner(e)) {
1178	>	List<Callable<String>> l = new ArrayList<>();
1179	>	l.add(new StringTask());
1180	>	l.add(null);
1181	>	try {
1182	>	e.invokeAll(l, MEDIUM_DELAY_MS, MILLISECONDS);
1183	>	shouldThrow();
1184	>	} catch (NullPointerException success) {}
1185	>	}
1186	>	}
1187	>
1188	>	/**
1189	>	* get of element of invokeAll(c) throws exception on failed task
1190	>	*/
1191	>	public void testTimedInvokeAll4() throws Exception {
1192	>	final ExecutorService e = new ScheduledThreadPoolExecutor(2);
1193	>	try (PoolCleaner cleaner = cleaner(e)) {
1194	>	List<Callable<String>> l = new ArrayList<>();
1195	>	l.add(new NPETask());
1196	>	List<Future<String>> futures =
1197	>	e.invokeAll(l, LONG_DELAY_MS, MILLISECONDS);
1198	>	assertEquals(1, futures.size());
1199	>	try {
1200	>	futures.get(0).get();
1201	>	shouldThrow();
1202	>	} catch (ExecutionException success) {
1203	>	assertTrue(success.getCause() instanceof NullPointerException);
1204	>	}
1205	>	}
1206	>	}
1207	>
1208	>	/**
1209	>	* timed invokeAll(c) returns results of all completed tasks
1210	>	*/
1211	>	public void testTimedInvokeAll5() throws Exception {
1212	>	final ExecutorService e = new ScheduledThreadPoolExecutor(2);
1213	>	try (PoolCleaner cleaner = cleaner(e)) {
1214	>	List<Callable<String>> l = new ArrayList<>();
1215	>	l.add(new StringTask());
1216	>	l.add(new StringTask());
1217	>	List<Future<String>> futures =
1218	>	e.invokeAll(l, LONG_DELAY_MS, MILLISECONDS);
1219	>	assertEquals(2, futures.size());
1220	>	for (Future<String> future : futures)
1221	>	assertSame(TEST_STRING, future.get());
1222	>	}
1223	>	}
1224	>
1225	>	/**
1226	>	* timed invokeAll(c) cancels tasks not completed by timeout
1227	>	*/
1228	>	public void testTimedInvokeAll6() throws Exception {
1229	>	for (long timeout = timeoutMillis();;) {
1230	>	final CountDownLatch done = new CountDownLatch(1);
1231	>	final Callable<String> waiter = new CheckedCallable<String>() {
1232	>	public String realCall() {
1233	>	try { done.await(LONG_DELAY_MS, MILLISECONDS); }
1234	>	catch (InterruptedException ok) {}
1235	>	return "1"; }};
1236	>	final ExecutorService p = new ScheduledThreadPoolExecutor(2);
1237	>	try (PoolCleaner cleaner = cleaner(p, done)) {
1238	>	List<Callable<String>> tasks = new ArrayList<>();
1239	>	tasks.add(new StringTask("0"));
1240	>	tasks.add(waiter);
1241	>	tasks.add(new StringTask("2"));
1242	>	long startTime = System.nanoTime();
1243	>	List<Future<String>> futures =
1244	>	p.invokeAll(tasks, timeout, MILLISECONDS);
1245	>	assertEquals(tasks.size(), futures.size());
1246	>	assertTrue(millisElapsedSince(startTime) >= timeout);
1247	>	for (Future future : futures)
1248	>	assertTrue(future.isDone());
1249	>	assertTrue(futures.get(1).isCancelled());
1250	>	try {
1251	>	assertEquals("0", futures.get(0).get());
1252	>	assertEquals("2", futures.get(2).get());
1253	>	break;
1254	>	} catch (CancellationException retryWithLongerTimeout) {
1255	>	timeout *= 2;
1256	>	if (timeout >= LONG_DELAY_MS / 2)
1257	>	fail("expected exactly one task to be cancelled");
1258	>	}
1259	>	}
1260	>	}
1261	>	}
1262	>
1263	>	/**
1264	>	* A fixed delay task with overflowing period should not prevent a
1265	>	* one-shot task from executing.
1266	>	* https://bugs.openjdk.java.net/browse/JDK-8051859
1267	>	*/
1268	>	public void testScheduleWithFixedDelay_overflow() throws Exception {
1269	>	final CountDownLatch delayedDone = new CountDownLatch(1);
1270	>	final CountDownLatch immediateDone = new CountDownLatch(1);
1271	>	final ScheduledThreadPoolExecutor p = new ScheduledThreadPoolExecutor(1);
1272	>	try (PoolCleaner cleaner = cleaner(p)) {
1273	>	final Runnable immediate = new Runnable() { public void run() {
1274	>	immediateDone.countDown();
1275	>	}};
1276	>	final Runnable delayed = new Runnable() { public void run() {
1277	>	delayedDone.countDown();
1278	>	p.submit(immediate);
1279	>	}};
1280	>	p.scheduleWithFixedDelay(delayed, 0L, Long.MAX_VALUE, SECONDS);
1281	>	await(delayedDone);
1282	>	await(immediateDone);
1283	>	}
1284		}
1285
1286		}

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