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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 1.87 by jsr166, Sat Mar 25 23:35:15 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	<	private static long SHORT_DELAY_MS = 100;
223	<	private static long MEDIUM_DELAY_MS = 1000;
224	<	private static long LONG_DELAY_MS = 10000;
225	<
226	<	static class MyRunnable implements Runnable {
227	<	volatile boolean waiting = true;
228	<	volatile boolean done = false;
229	<	public void run(){
230	<	try{
231	<	Thread.sleep(MEDIUM_DELAY_MS);
232	<	waiting = false;
233	<	done = true;
234	<	} catch(Exception e){}
235	<	}
236	<	}
237	<
238	<	static class MyCallable implements Callable {
239	<	volatile boolean waiting = true;
240	<	volatile boolean done = false;
241	<	public Object call(){
242	<	try{
243	<	Thread.sleep(MEDIUM_DELAY_MS);
244	<	waiting = false;
245	<	done = true;
246	<	}catch(Exception e){}
247	<	return Boolean.TRUE;
248	<	}
249	<	}
250	<
251	<	/**
252	<	*  Test to verify execute successfully runs the given Runnable
253	<	*/
254	<	public void testExecute(){
255	<	try{
256	<	MyRunnable runnable =new MyRunnable();
257	<	ScheduledExecutor one = new ScheduledExecutor(1);
258	<	one.execute(runnable);
259	<	Thread.sleep(100);
260	<	assertTrue(runnable.waiting);
261	<	one.shutdown();
262	<	// make sure the Runnable has time to complete
263	<	try{Thread.sleep(1010);}catch(InterruptedException e){}
264	<	assertFalse(runnable.waiting);
265	<	assertTrue(runnable.done);
266	<	one.shutdown();
267	<	}
268	<	catch(Exception e){
269	<	fail("unexpected exception");
270	<	}
271	<	}
272	<
273	<	/**
274	<	*  Test to verify schedule successfully runs the given Callable.
275	<	*  The waiting flag shows that the Callable is not started until
276	<	*  immediately.
277	<	*/
278	<	public void testSchedule1(){
279	<	try{
280	<	MyCallable callable = new MyCallable();
281	<	ScheduledExecutor one = new ScheduledExecutor(1);
282	<	Future f = one.schedule(callable, 500, TimeUnit.MILLISECONDS);
283	<	//      Thread.sleep(505);
284	<	assertTrue(callable.waiting);
285	<	Thread.sleep(2000);
286	<	assertTrue(callable.done);
287	<	assertEquals(Boolean.TRUE, f.get());
288	<	one.shutdown();
289	<	}catch(RejectedExecutionException e){}
290	<	catch(Exception e){}
291	<	}
292	<
293	<	/**
294	<	*  Another version of schedule, only using Runnable instead of Callable
295	<	*/
296	<	public void testSchedule3(){
297	<	try{
298	<	MyRunnable runnable = new MyRunnable();
299	<	ScheduledExecutor one = new ScheduledExecutor(1);
300	<	one.schedule(runnable, 500, TimeUnit.MILLISECONDS);
301	<	Thread.sleep(50);
302	<	assertTrue(runnable.waiting);
303	<	Thread.sleep(2000);
304	<	assertTrue(runnable.done);
305	<	one.shutdown();
306	<	} catch(Exception e){
307	<	fail("unexpected exception");
308	<	}
309	<	}
310	<
311	<	/**
312	<	*  The final version of schedule, using both long, TimeUnit and Runnable
313	<	*/
314	<	public void testSchedule4(){
315	<	try{
316	<	MyRunnable runnable = new MyRunnable();
317	<	ScheduledExecutor one = new ScheduledExecutor(1);
318	<	one.schedule(runnable, 500, TimeUnit.MILLISECONDS);
319	<	//      Thread.sleep(505);
320	<	assertTrue(runnable.waiting);
321	<	Thread.sleep(2000);
322	<	assertTrue(runnable.done);
323	<	one.shutdown();
324	<	} catch(Exception e){
325	<	fail("unexpected exception");
326	<	}
327	<	}
328	<
329	<
330	<	// exception tests
331	<
332	<	/**
333	<	*  Test to verify schedule(Runnable, long) throws RejectedExecutionException
334	<	*  This occurs on an attempt to schedule a task on a shutdown executor
335	<	*/
336	<	public void testSchedule1_RejectedExecutionException(){
337	<	try{
338	<	ScheduledExecutor se = new ScheduledExecutor(1);
339	<	se.shutdown();
340	<	se.schedule(new Runnable(){
341	<	public void run(){}
342	<	}, 10000, TimeUnit.MILLISECONDS);
343	<	fail("shoud throw");
344	<	}catch(RejectedExecutionException e){}
345	<	}
346	<
347	<	/**
348	<	*  Test to verify schedule(Callable, long, TimeUnit) throws RejectedExecutionException
349	<	*  This occurs on an attempt to schedule a task on a shutdown executor
350	<	*/
351	<	public void testSchedule2_RejectedExecutionException(){
352	<	try{
353	<	ScheduledExecutor se = new ScheduledExecutor(1);
354	<	se.shutdown();
355	<	se.schedule(new Callable(){
356	<	public Object call(){
357	<	return Boolean.TRUE;
358	<	}
359	<	}, (long)100, TimeUnit.SECONDS);
360	<	fail("should throw");
361	<	}catch(RejectedExecutionException e){}
362	<	}
363	<
364	<	/**
365	<	*  Test to verify schedule(Callable, long) throws RejectedExecutionException
366	<	*  This occurs on an attempt to schedule a task on a shutdown executor
367	<	*/
368	<	public void testSchedule3_RejectedExecutionException(){
369	<	try{
370	<	ScheduledExecutor se = new ScheduledExecutor(1);
371	<	se.shutdown();
372	<	se.schedule(new Callable(){
373	<	public Object call(){
374	<	return Boolean.TRUE;
375	<	}
376	<	},  10000, TimeUnit.MILLISECONDS);
377	<	fail("should throw");
378	<	}catch(RejectedExecutionException e){}
379	<	}
380	<
381	<	/**
382	<	*  Test to verify scheduleAtFixedRate(Runnable, long, long, TimeUnit) throws
383	<	*  RejectedExecutionException.
384	<	*  This occurs on an attempt to schedule a task on a shutdown executor
385	<	*/
386	<	public void testScheduleAtFixedRate1_RejectedExecutionException(){
387	<	try{
388	<	ScheduledExecutor se = new ScheduledExecutor(1);
389	<	se.shutdown();
390	<	se.scheduleAtFixedRate(new Runnable(){
391	<	public void run(){}
392	<	}, 100, 100, TimeUnit.SECONDS);
393	<	fail("should throw");
394	<	}catch(RejectedExecutionException e){}
395	<	}
396	<
397	<	/**
398	<	*  Test to verify scheduleAtFixedRate(Runnable, long, long, TimeUnit) throws
399	<	*  RejectedExecutionException.
400	<	*  This occurs on an attempt to schedule a task on a shutdown executor
401	<	*/
402	<	public void testScheduleAtFixedRate2_RejectedExecutionException(){
403	<	try{
404	<	ScheduledExecutor se = new ScheduledExecutor(1);
405	<	se.shutdown();
406	<	se.scheduleAtFixedRate(new Runnable(){
407	<	public void run(){}
408	<	},  1, 100, TimeUnit.SECONDS);
409	<	fail("should throw");
410	<	}catch(RejectedExecutionException e){}
411	<	}
412	<
413	<	/**
414	<	*  Test to verify scheduleWithFixedDelay(Runnable, long, long, TimeUnit) throws
415	<	*  RejectedExecutionException.
416	<	*  This occurs on an attempt to schedule a task on a shutdown executor
417	<	*/
418	<	public void testScheduleWithFixedDelay1_RejectedExecutionException(){
419	<	try{
420	<	ScheduledExecutor se = new ScheduledExecutor(1);
421	<	se.shutdown();
422	<	se.scheduleWithFixedDelay(new Runnable(){
423	<	public void run(){}
424	<	}, 100, 100, TimeUnit.SECONDS);
425	<	fail("should throw");
426	<	}catch(RejectedExecutionException e){}
427	<	}
428	<
429	<	/**
430	<	*  Test to verify scheduleWithFixedDelay(Runnable, long, long, TimeUnit) throws
431	<	*  RejectedExecutionException.
432	<	*  This occurs on an attempt to schedule a task on a shutdown executor
433	<	*/
434	<	public void testScheduleWithFixedDelay2_RejectedExecutionException(){
435	<	try{
436	<	ScheduledExecutor se = new ScheduledExecutor(1);
437	<	se.shutdown();
438	<	se.scheduleWithFixedDelay(new Runnable(){
439	<	public void run(){}
440	<	},  1, 100, TimeUnit.SECONDS);
441	<	fail("should throw");
442	<	}catch(RejectedExecutionException e){}
443	<	}
444	<
445	<	/**
446	<	*  Test to verify execute throws RejectedExecutionException
447	<	*  This occurs on an attempt to schedule a task on a shutdown executor
448	<	*/
449	<	public void testExecute_RejectedExecutionException(){
450	<	try{
451	<	ScheduledExecutor se = new ScheduledExecutor(1);
452	<	se.shutdown();
453	<	se.execute(new Runnable(){
454	<	public void run(){}
455	<	});
456	<	fail("should throw");
457	<	}catch(RejectedExecutionException e){}
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	>	final int UNSPECIFIED = 0, YES = 1, NO = 2;
748	>	for (int maybe : new int[] { UNSPECIFIED, YES, NO })
749	>	{
750	>	final int poolSize = 2;
751	>	final ScheduledThreadPoolExecutor p
752	>	= new ScheduledThreadPoolExecutor(poolSize);
753	>	final boolean effectiveDelayedPolicy  = (maybe != NO);
754	>	final boolean effectivePeriodicPolicy = (maybe == YES);
755	>	final boolean effectiveRemovePolicy   = (maybe == YES);
756	>	if (maybe != UNSPECIFIED) {
757	>	p.setExecuteExistingDelayedTasksAfterShutdownPolicy(maybe == YES);
758	>	p.setContinueExistingPeriodicTasksAfterShutdownPolicy(maybe == YES);
759	>	p.setRemoveOnCancelPolicy(maybe == YES);
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(
787	>	countDowner(periodicLatch1), 1, 1, MILLISECONDS));
788	>	periodics.add(p.scheduleWithFixedDelay(
789	>	countDowner(periodicLatch2), 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	>	unblock.countDown();    // Release all pool threads
812	>
813	>	if (effectiveDelayedPolicy)
814	>	for (Future<?> delayed : delayeds) assertNull(delayed.get());
815	>	if (effectivePeriodicPolicy) {
816	>	await(periodicLatch1);
817	>	await(periodicLatch2);
818	>	for (Future<?> periodic : periodics) {
819	>	assertTrue(periodic.cancel(false));
820	>	assertTrue(periodic.isCancelled());
821	>	assertTrue(periodic.isDone());
822	>	}
823	>	}
824	>	for (Future<?> blocker : blockers) assertNull(blocker.get());
825	>	assertTrue(p.awaitTermination(LONG_DELAY_MS, MILLISECONDS));
826	>	assertTrue(p.isTerminated());
827	>
828	>	for (Future<?> future : delayeds) {
829	>	assertTrue(effectiveDelayedPolicy ^ future.isCancelled());
830	>	assertTrue(future.isDone());
831	>	}
832	>	for (Future<?> future : periodics)
833	>	assertTrue(future.isCancelled());
834	>	for (Future<?> future : blockers)
835	>	assertNull(future.get());
836	>	assertEquals(2 + (effectiveDelayedPolicy ? 1 : 0), ran.get());
837	>	}}
838	>
839	>	/**
840	>	* completed submit of callable returns result
841	>	*/
842	>	public void testSubmitCallable() throws Exception {
843	>	final ExecutorService e = new ScheduledThreadPoolExecutor(2);
844	>	try (PoolCleaner cleaner = cleaner(e)) {
845	>	Future<String> future = e.submit(new StringTask());
846	>	String result = future.get();
847	>	assertSame(TEST_STRING, result);
848	>	}
849	>	}
850	>
851	>	/**
852	>	* completed submit of runnable returns successfully
853	>	*/
854	>	public void testSubmitRunnable() throws Exception {
855	>	final ExecutorService e = new ScheduledThreadPoolExecutor(2);
856	>	try (PoolCleaner cleaner = cleaner(e)) {
857	>	Future<?> future = e.submit(new NoOpRunnable());
858	>	future.get();
859	>	assertTrue(future.isDone());
860	>	}
861	>	}
862	>
863	>	/**
864	>	* completed submit of (runnable, result) returns result
865	>	*/
866	>	public void testSubmitRunnable2() throws Exception {
867	>	final ExecutorService e = new ScheduledThreadPoolExecutor(2);
868	>	try (PoolCleaner cleaner = cleaner(e)) {
869	>	Future<String> future = e.submit(new NoOpRunnable(), TEST_STRING);
870	>	String result = future.get();
871	>	assertSame(TEST_STRING, result);
872	>	}
873	>	}
874	>
875	>	/**
876	>	* invokeAny(null) throws NPE
877	>	*/
878	>	public void testInvokeAny1() throws Exception {
879	>	final ExecutorService e = new ScheduledThreadPoolExecutor(2);
880	>	try (PoolCleaner cleaner = cleaner(e)) {
881	>	try {
882	>	e.invokeAny(null);
883	>	shouldThrow();
884	>	} catch (NullPointerException success) {}
885	>	}
886	>	}
887	>
888	>	/**
889	>	* invokeAny(empty collection) throws IAE
890	>	*/
891	>	public void testInvokeAny2() throws Exception {
892	>	final ExecutorService e = new ScheduledThreadPoolExecutor(2);
893	>	try (PoolCleaner cleaner = cleaner(e)) {
894	>	try {
895	>	e.invokeAny(new ArrayList<Callable<String>>());
896	>	shouldThrow();
897	>	} catch (IllegalArgumentException success) {}
898	>	}
899	>	}
900	>
901	>	/**
902	>	* invokeAny(c) throws NPE if c has null elements
903	>	*/
904	>	public void testInvokeAny3() throws Exception {
905	>	CountDownLatch latch = new CountDownLatch(1);
906	>	final ExecutorService e = new ScheduledThreadPoolExecutor(2);
907	>	try (PoolCleaner cleaner = cleaner(e)) {
908	>	List<Callable<String>> l = new ArrayList<>();
909	>	l.add(latchAwaitingStringTask(latch));
910	>	l.add(null);
911	>	try {
912	>	e.invokeAny(l);
913	>	shouldThrow();
914	>	} catch (NullPointerException success) {}
915	>	latch.countDown();
916	>	}
917	>	}
918	>
919	>	/**
920	>	* invokeAny(c) throws ExecutionException if no task completes
921	>	*/
922	>	public void testInvokeAny4() throws Exception {
923	>	final ExecutorService e = new ScheduledThreadPoolExecutor(2);
924	>	try (PoolCleaner cleaner = cleaner(e)) {
925	>	List<Callable<String>> l = new ArrayList<>();
926	>	l.add(new NPETask());
927	>	try {
928	>	e.invokeAny(l);
929	>	shouldThrow();
930	>	} catch (ExecutionException success) {
931	>	assertTrue(success.getCause() instanceof NullPointerException);
932	>	}
933	>	}
934	>	}
935	>
936	>	/**
937	>	* invokeAny(c) returns result of some task
938	>	*/
939	>	public void testInvokeAny5() throws Exception {
940	>	final ExecutorService e = new ScheduledThreadPoolExecutor(2);
941	>	try (PoolCleaner cleaner = cleaner(e)) {
942	>	List<Callable<String>> l = new ArrayList<>();
943	>	l.add(new StringTask());
944	>	l.add(new StringTask());
945	>	String result = e.invokeAny(l);
946	>	assertSame(TEST_STRING, result);
947	>	}
948	>	}
949	>
950	>	/**
951	>	* invokeAll(null) throws NPE
952	>	*/
953	>	public void testInvokeAll1() throws Exception {
954	>	final ExecutorService e = new ScheduledThreadPoolExecutor(2);
955	>	try (PoolCleaner cleaner = cleaner(e)) {
956	>	try {
957	>	e.invokeAll(null);
958	>	shouldThrow();
959	>	} catch (NullPointerException success) {}
960	>	}
961	>	}
962	>
963	>	/**
964	>	* invokeAll(empty collection) returns empty collection
965	>	*/
966	>	public void testInvokeAll2() throws Exception {
967	>	final ExecutorService e = new ScheduledThreadPoolExecutor(2);
968	>	try (PoolCleaner cleaner = cleaner(e)) {
969	>	List<Future<String>> r = e.invokeAll(new ArrayList<Callable<String>>());
970	>	assertTrue(r.isEmpty());
971	>	}
972	>	}
973	>
974	>	/**
975	>	* invokeAll(c) throws NPE if c has null elements
976	>	*/
977	>	public void testInvokeAll3() throws Exception {
978	>	final ExecutorService e = new ScheduledThreadPoolExecutor(2);
979	>	try (PoolCleaner cleaner = cleaner(e)) {
980	>	List<Callable<String>> l = new ArrayList<>();
981	>	l.add(new StringTask());
982	>	l.add(null);
983	>	try {
984	>	e.invokeAll(l);
985	>	shouldThrow();
986	>	} catch (NullPointerException success) {}
987	>	}
988	>	}
989	>
990	>	/**
991	>	* get of invokeAll(c) throws exception on failed task
992	>	*/
993	>	public void testInvokeAll4() throws Exception {
994	>	final ExecutorService e = new ScheduledThreadPoolExecutor(2);
995	>	try (PoolCleaner cleaner = cleaner(e)) {
996	>	List<Callable<String>> l = new ArrayList<>();
997	>	l.add(new NPETask());
998	>	List<Future<String>> futures = e.invokeAll(l);
999	>	assertEquals(1, futures.size());
1000	>	try {
1001	>	futures.get(0).get();
1002	>	shouldThrow();
1003	>	} catch (ExecutionException success) {
1004	>	assertTrue(success.getCause() instanceof NullPointerException);
1005	>	}
1006	>	}
1007	>	}
1008	>
1009	>	/**
1010	>	* invokeAll(c) returns results of all completed tasks
1011	>	*/
1012	>	public void testInvokeAll5() throws Exception {
1013	>	final ExecutorService e = new ScheduledThreadPoolExecutor(2);
1014	>	try (PoolCleaner cleaner = cleaner(e)) {
1015	>	List<Callable<String>> l = new ArrayList<>();
1016	>	l.add(new StringTask());
1017	>	l.add(new StringTask());
1018	>	List<Future<String>> futures = e.invokeAll(l);
1019	>	assertEquals(2, futures.size());
1020	>	for (Future<String> future : futures)
1021	>	assertSame(TEST_STRING, future.get());
1022	>	}
1023	>	}
1024	>
1025	>	/**
1026	>	* timed invokeAny(null) throws NPE
1027	>	*/
1028	>	public void testTimedInvokeAny1() throws Exception {
1029	>	final ExecutorService e = new ScheduledThreadPoolExecutor(2);
1030	>	try (PoolCleaner cleaner = cleaner(e)) {
1031	>	try {
1032	>	e.invokeAny(null, MEDIUM_DELAY_MS, MILLISECONDS);
1033	>	shouldThrow();
1034	>	} catch (NullPointerException success) {}
1035	>	}
1036	>	}
1037	>
1038	>	/**
1039	>	* timed invokeAny(,,null) throws NPE
1040	>	*/
1041	>	public void testTimedInvokeAnyNullTimeUnit() throws Exception {
1042	>	final ExecutorService e = new ScheduledThreadPoolExecutor(2);
1043	>	try (PoolCleaner cleaner = cleaner(e)) {
1044	>	List<Callable<String>> l = new ArrayList<>();
1045	>	l.add(new StringTask());
1046	>	try {
1047	>	e.invokeAny(l, MEDIUM_DELAY_MS, null);
1048	>	shouldThrow();
1049	>	} catch (NullPointerException success) {}
1050	>	}
1051	>	}
1052	>
1053	>	/**
1054	>	* timed invokeAny(empty collection) throws IAE
1055	>	*/
1056	>	public void testTimedInvokeAny2() throws Exception {
1057	>	final ExecutorService e = new ScheduledThreadPoolExecutor(2);
1058	>	try (PoolCleaner cleaner = cleaner(e)) {
1059	>	try {
1060	>	e.invokeAny(new ArrayList<Callable<String>>(), MEDIUM_DELAY_MS, MILLISECONDS);
1061	>	shouldThrow();
1062	>	} catch (IllegalArgumentException success) {}
1063	>	}
1064	>	}
1065	>
1066	>	/**
1067	>	* timed invokeAny(c) throws NPE if c has null elements
1068	>	*/
1069	>	public void testTimedInvokeAny3() throws Exception {
1070	>	CountDownLatch latch = new CountDownLatch(1);
1071	>	final ExecutorService e = new ScheduledThreadPoolExecutor(2);
1072	>	try (PoolCleaner cleaner = cleaner(e)) {
1073	>	List<Callable<String>> l = new ArrayList<>();
1074	>	l.add(latchAwaitingStringTask(latch));
1075	>	l.add(null);
1076	>	try {
1077	>	e.invokeAny(l, MEDIUM_DELAY_MS, MILLISECONDS);
1078	>	shouldThrow();
1079	>	} catch (NullPointerException success) {}
1080	>	latch.countDown();
1081	>	}
1082	>	}
1083	>
1084	>	/**
1085	>	* timed invokeAny(c) throws ExecutionException if no task completes
1086	>	*/
1087	>	public void testTimedInvokeAny4() throws Exception {
1088	>	final ExecutorService e = new ScheduledThreadPoolExecutor(2);
1089	>	try (PoolCleaner cleaner = cleaner(e)) {
1090	>	long startTime = System.nanoTime();
1091	>	List<Callable<String>> l = new ArrayList<>();
1092	>	l.add(new NPETask());
1093	>	try {
1094	>	e.invokeAny(l, LONG_DELAY_MS, MILLISECONDS);
1095	>	shouldThrow();
1096	>	} catch (ExecutionException success) {
1097	>	assertTrue(success.getCause() instanceof NullPointerException);
1098	>	}
1099	>	assertTrue(millisElapsedSince(startTime) < LONG_DELAY_MS);
1100	>	}
1101	>	}
1102	>
1103	>	/**
1104	>	* timed invokeAny(c) returns result of some task
1105	>	*/
1106	>	public void testTimedInvokeAny5() throws Exception {
1107	>	final ExecutorService e = new ScheduledThreadPoolExecutor(2);
1108	>	try (PoolCleaner cleaner = cleaner(e)) {
1109	>	long startTime = System.nanoTime();
1110	>	List<Callable<String>> l = new ArrayList<>();
1111	>	l.add(new StringTask());
1112	>	l.add(new StringTask());
1113	>	String result = e.invokeAny(l, LONG_DELAY_MS, MILLISECONDS);
1114	>	assertSame(TEST_STRING, result);
1115	>	assertTrue(millisElapsedSince(startTime) < LONG_DELAY_MS);
1116	>	}
1117	>	}
1118	>
1119	>	/**
1120	>	* timed invokeAll(null) throws NPE
1121	>	*/
1122	>	public void testTimedInvokeAll1() throws Exception {
1123	>	final ExecutorService e = new ScheduledThreadPoolExecutor(2);
1124	>	try (PoolCleaner cleaner = cleaner(e)) {
1125	>	try {
1126	>	e.invokeAll(null, MEDIUM_DELAY_MS, MILLISECONDS);
1127	>	shouldThrow();
1128	>	} catch (NullPointerException success) {}
1129	>	}
1130	>	}
1131	>
1132	>	/**
1133	>	* timed invokeAll(,,null) throws NPE
1134	>	*/
1135	>	public void testTimedInvokeAllNullTimeUnit() throws Exception {
1136	>	final ExecutorService e = new ScheduledThreadPoolExecutor(2);
1137	>	try (PoolCleaner cleaner = cleaner(e)) {
1138	>	List<Callable<String>> l = new ArrayList<>();
1139	>	l.add(new StringTask());
1140	>	try {
1141	>	e.invokeAll(l, MEDIUM_DELAY_MS, null);
1142	>	shouldThrow();
1143	>	} catch (NullPointerException success) {}
1144	>	}
1145	>	}
1146	>
1147	>	/**
1148	>	* timed invokeAll(empty collection) returns empty collection
1149	>	*/
1150	>	public void testTimedInvokeAll2() throws Exception {
1151	>	final ExecutorService e = new ScheduledThreadPoolExecutor(2);
1152	>	try (PoolCleaner cleaner = cleaner(e)) {
1153	>	List<Future<String>> r = e.invokeAll(new ArrayList<Callable<String>>(),
1154	>	MEDIUM_DELAY_MS, MILLISECONDS);
1155	>	assertTrue(r.isEmpty());
1156	>	}
1157	>	}
1158	>
1159	>	/**
1160	>	* timed invokeAll(c) throws NPE if c has null elements
1161	>	*/
1162	>	public void testTimedInvokeAll3() throws Exception {
1163	>	final ExecutorService e = new ScheduledThreadPoolExecutor(2);
1164	>	try (PoolCleaner cleaner = cleaner(e)) {
1165	>	List<Callable<String>> l = new ArrayList<>();
1166	>	l.add(new StringTask());
1167	>	l.add(null);
1168	>	try {
1169	>	e.invokeAll(l, MEDIUM_DELAY_MS, MILLISECONDS);
1170	>	shouldThrow();
1171	>	} catch (NullPointerException success) {}
1172	>	}
1173	>	}
1174	>
1175	>	/**
1176	>	* get of element of invokeAll(c) throws exception on failed task
1177	>	*/
1178	>	public void testTimedInvokeAll4() throws Exception {
1179	>	final ExecutorService e = new ScheduledThreadPoolExecutor(2);
1180	>	try (PoolCleaner cleaner = cleaner(e)) {
1181	>	List<Callable<String>> l = new ArrayList<>();
1182	>	l.add(new NPETask());
1183	>	List<Future<String>> futures =
1184	>	e.invokeAll(l, LONG_DELAY_MS, MILLISECONDS);
1185	>	assertEquals(1, futures.size());
1186	>	try {
1187	>	futures.get(0).get();
1188	>	shouldThrow();
1189	>	} catch (ExecutionException success) {
1190	>	assertTrue(success.getCause() instanceof NullPointerException);
1191	>	}
1192	>	}
1193	>	}
1194	>
1195	>	/**
1196	>	* timed invokeAll(c) returns results of all completed tasks
1197	>	*/
1198	>	public void testTimedInvokeAll5() throws Exception {
1199	>	final ExecutorService e = new ScheduledThreadPoolExecutor(2);
1200	>	try (PoolCleaner cleaner = cleaner(e)) {
1201	>	List<Callable<String>> l = new ArrayList<>();
1202	>	l.add(new StringTask());
1203	>	l.add(new StringTask());
1204	>	List<Future<String>> futures =
1205	>	e.invokeAll(l, LONG_DELAY_MS, MILLISECONDS);
1206	>	assertEquals(2, futures.size());
1207	>	for (Future<String> future : futures)
1208	>	assertSame(TEST_STRING, future.get());
1209	>	}
1210	>	}
1211	>
1212	>	/**
1213	>	* timed invokeAll(c) cancels tasks not completed by timeout
1214	>	*/
1215	>	public void testTimedInvokeAll6() throws Exception {
1216	>	for (long timeout = timeoutMillis();;) {
1217	>	final CountDownLatch done = new CountDownLatch(1);
1218	>	final Callable<String> waiter = new CheckedCallable<String>() {
1219	>	public String realCall() {
1220	>	try { done.await(LONG_DELAY_MS, MILLISECONDS); }
1221	>	catch (InterruptedException ok) {}
1222	>	return "1"; }};
1223	>	final ExecutorService p = new ScheduledThreadPoolExecutor(2);
1224	>	try (PoolCleaner cleaner = cleaner(p, done)) {
1225	>	List<Callable<String>> tasks = new ArrayList<>();
1226	>	tasks.add(new StringTask("0"));
1227	>	tasks.add(waiter);
1228	>	tasks.add(new StringTask("2"));
1229	>	long startTime = System.nanoTime();
1230	>	List<Future<String>> futures =
1231	>	p.invokeAll(tasks, timeout, MILLISECONDS);
1232	>	assertEquals(tasks.size(), futures.size());
1233	>	assertTrue(millisElapsedSince(startTime) >= timeout);
1234	>	for (Future future : futures)
1235	>	assertTrue(future.isDone());
1236	>	assertTrue(futures.get(1).isCancelled());
1237	>	try {
1238	>	assertEquals("0", futures.get(0).get());
1239	>	assertEquals("2", futures.get(2).get());
1240	>	break;
1241	>	} catch (CancellationException retryWithLongerTimeout) {
1242	>	timeout *= 2;
1243	>	if (timeout >= LONG_DELAY_MS / 2)
1244	>	fail("expected exactly one task to be cancelled");
1245	>	}
1246	>	}
1247	>	}
1248	>	}
1249	>
1250	>	/**
1251	>	* A fixed delay task with overflowing period should not prevent a
1252	>	* one-shot task from executing.
1253	>	* https://bugs.openjdk.java.net/browse/JDK-8051859
1254	>	*/
1255	>	public void testScheduleWithFixedDelay_overflow() throws Exception {
1256	>	final CountDownLatch delayedDone = new CountDownLatch(1);
1257	>	final CountDownLatch immediateDone = new CountDownLatch(1);
1258	>	final ScheduledThreadPoolExecutor p = new ScheduledThreadPoolExecutor(1);
1259	>	try (PoolCleaner cleaner = cleaner(p)) {
1260	>	final Runnable immediate = new Runnable() { public void run() {
1261	>	immediateDone.countDown();
1262	>	}};
1263	>	final Runnable delayed = new Runnable() { public void run() {
1264	>	delayedDone.countDown();
1265	>	p.submit(immediate);
1266	>	}};
1267	>	p.scheduleWithFixedDelay(delayed, 0L, Long.MAX_VALUE, SECONDS);
1268	>	await(delayedDone);
1269	>	await(immediateDone);
1270	>	}
1271		}
1272
1273		}

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