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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 1.99 by dl, Tue Jan 26 13:33:06 2021 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.Collection;
15	+	import java.util.Collections;
16	+	import java.util.HashSet;
17	+	import java.util.List;
18	+	import java.util.concurrent.BlockingQueue;
19	+	import java.util.concurrent.Callable;
20	+	import java.util.concurrent.CancellationException;
21	+	import java.util.concurrent.CountDownLatch;
22	+	import java.util.concurrent.ExecutionException;
23	+	import java.util.concurrent.ExecutorService;
24	+	import java.util.concurrent.Future;
25	+	import java.util.concurrent.RejectedExecutionException;
26	+	import java.util.concurrent.ScheduledFuture;
27	+	import java.util.concurrent.ScheduledThreadPoolExecutor;
28	+	import java.util.concurrent.ThreadFactory;
29	+	import java.util.concurrent.ThreadLocalRandom;
30	+	import java.util.concurrent.ThreadPoolExecutor;
31	+	import java.util.concurrent.atomic.AtomicBoolean;
32	+	import java.util.concurrent.atomic.AtomicInteger;
33	+	import java.util.concurrent.atomic.AtomicLong;
34	+	import java.util.stream.Stream;
35	+
36	+	import junit.framework.Test;
37	+	import junit.framework.TestSuite;
38	+
39	+	public class ScheduledExecutorTest extends JSR166TestCase {
40		public static void main(String[] args) {
41	<	junit.textui.TestRunner.run (suite());
41	>	main(suite(), args);
42		}
19	–
20	–
43		public static Test suite() {
44	<	return new TestSuite(ScheduledExecutorTest.class);
44	>	return new TestSuite(ScheduledExecutorTest.class);
45		}
46
47	<	private static long SHORT_DELAY_MS = 100;
48	<	private static long MEDIUM_DELAY_MS = 1000;
49	<	private static long LONG_DELAY_MS = 10000;
50	<
51	<	static class MyRunnable implements Runnable {
52	<	volatile boolean waiting = true;
53	<	volatile boolean done = false;
54	<	public void run(){
55	<	try{
56	<	Thread.sleep(MEDIUM_DELAY_MS);
57	<	waiting = false;
58	<	done = true;
59	<	} catch(Exception e){}
60	<	}
61	<	}
62	<
63	<	static class MyCallable implements Callable {
64	<	volatile boolean waiting = true;
65	<	volatile boolean done = false;
66	<	public Object call(){
67	<	try{
68	<	Thread.sleep(MEDIUM_DELAY_MS);
69	<	waiting = false;
70	<	done = true;
71	<	}catch(Exception e){}
72	<	return Boolean.TRUE;
73	<	}
74	<	}
75	<
76	<	/**
77	<	*  Test to verify execute successfully runs the given Runnable
78	<	*/
79	<	public void testExecute(){
80	<	try{
81	<	MyRunnable runnable =new MyRunnable();
82	<	ScheduledExecutor one = new ScheduledExecutor(1);
83	<	one.execute(runnable);
84	<	Thread.sleep(100);
85	<	assertTrue(runnable.waiting);
86	<	one.shutdown();
87	<	// make sure the Runnable has time to complete
88	<	try{Thread.sleep(1010);}catch(InterruptedException e){}
89	<	assertFalse(runnable.waiting);
90	<	assertTrue(runnable.done);
91	<	one.shutdown();
92	<	}
93	<	catch(Exception e){
94	<	fail("unexpected exception");
95	<	}
96	<	}
97	<
98	<	/**
99	<	*  Test to verify schedule successfully runs the given Callable.
100	<	*  The waiting flag shows that the Callable is not started until
101	<	*  immediately.
102	<	*/
103	<	public void testSchedule1(){
104	<	try{
105	<	MyCallable callable = new MyCallable();
106	<	ScheduledExecutor one = new ScheduledExecutor(1);
107	<	Future f = one.schedule(callable, 500, TimeUnit.MILLISECONDS);
108	<	//      Thread.sleep(505);
109	<	assertTrue(callable.waiting);
110	<	Thread.sleep(2000);
111	<	assertTrue(callable.done);
112	<	assertEquals(Boolean.TRUE, f.get());
113	<	one.shutdown();
114	<	}catch(RejectedExecutionException e){}
115	<	catch(Exception e){}
116	<	}
117	<
118	<	/**
119	<	*  Another version of schedule, only using Runnable instead of Callable
120	<	*/
121	<	public void testSchedule3(){
122	<	try{
123	<	MyRunnable runnable = new MyRunnable();
124	<	ScheduledExecutor one = new ScheduledExecutor(1);
125	<	one.schedule(runnable, 500, TimeUnit.MILLISECONDS);
126	<	Thread.sleep(50);
127	<	assertTrue(runnable.waiting);
128	<	Thread.sleep(2000);
129	<	assertTrue(runnable.done);
130	<	one.shutdown();
131	<	} catch(Exception e){
132	<	fail("unexpected exception");
133	<	}
134	<	}
135	<
136	<	/**
137	<	*  The final version of schedule, using both long, TimeUnit and Runnable
138	<	*/
139	<	public void testSchedule4(){
140	<	try{
141	<	MyRunnable runnable = new MyRunnable();
142	<	ScheduledExecutor one = new ScheduledExecutor(1);
143	<	one.schedule(runnable, 500, TimeUnit.MILLISECONDS);
144	<	//      Thread.sleep(505);
145	<	assertTrue(runnable.waiting);
146	<	Thread.sleep(2000);
147	<	assertTrue(runnable.done);
148	<	one.shutdown();
149	<	} catch(Exception e){
150	<	fail("unexpected exception");
151	<	}
152	<	}
153	<
154	<
155	<	// exception tests
156	<
157	<	/**
158	<	*  Test to verify schedule(Runnable, long) throws RejectedExecutionException
159	<	*  This occurs on an attempt to schedule a task on a shutdown executor
160	<	*/
161	<	public void testSchedule1_RejectedExecutionException(){
162	<	try{
163	<	ScheduledExecutor se = new ScheduledExecutor(1);
164	<	se.shutdown();
165	<	se.schedule(new Runnable(){
166	<	public void run(){}
167	<	}, 10000, TimeUnit.MILLISECONDS);
168	<	fail("shoud throw");
169	<	}catch(RejectedExecutionException e){}
170	<	}
171	<
172	<	/**
173	<	*  Test to verify schedule(Callable, long, TimeUnit) throws RejectedExecutionException
174	<	*  This occurs on an attempt to schedule a task on a shutdown executor
175	<	*/
176	<	public void testSchedule2_RejectedExecutionException(){
177	<	try{
178	<	ScheduledExecutor se = new ScheduledExecutor(1);
179	<	se.shutdown();
180	<	se.schedule(new Callable(){
181	<	public Object call(){
182	<	return Boolean.TRUE;
183	<	}
184	<	}, (long)100, TimeUnit.SECONDS);
185	<	fail("should throw");
186	<	}catch(RejectedExecutionException e){}
47	>	/**
48	>	* execute successfully executes a runnable
49	>	*/
50	>	public void testExecute() throws InterruptedException {
51	>	final ScheduledThreadPoolExecutor p = new ScheduledThreadPoolExecutor(1);
52	>	try (PoolCleaner cleaner = cleaner(p)) {
53	>	final CountDownLatch done = new CountDownLatch(1);
54	>	final Runnable task = new CheckedRunnable() {
55	>	public void realRun() { done.countDown(); }};
56	>	p.execute(task);
57	>	await(done);
58	>	}
59	>	}
60	>
61	>	/**
62	>	* delayed schedule of callable successfully executes after delay
63	>	*/
64	>	public void testSchedule1() throws Exception {
65	>	final ScheduledThreadPoolExecutor p = new ScheduledThreadPoolExecutor(1);
66	>	try (PoolCleaner cleaner = cleaner(p)) {
67	>	final long startTime = System.nanoTime();
68	>	final CountDownLatch done = new CountDownLatch(1);
69	>	Callable<Boolean> task = new CheckedCallable<Boolean>() {
70	>	public Boolean realCall() {
71	>	done.countDown();
72	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis());
73	>	return Boolean.TRUE;
74	>	}};
75	>	Future<Boolean> f = p.schedule(task, timeoutMillis(), MILLISECONDS);
76	>	assertSame(Boolean.TRUE, f.get());
77	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis());
78	>	assertEquals(0L, done.getCount());
79	>	}
80	>	}
81	>
82	>	/**
83	>	* delayed schedule of runnable successfully executes after delay
84	>	*/
85	>	public void testSchedule3() throws Exception {
86	>	final ScheduledThreadPoolExecutor p = new ScheduledThreadPoolExecutor(1);
87	>	try (PoolCleaner cleaner = cleaner(p)) {
88	>	final long startTime = System.nanoTime();
89	>	final CountDownLatch done = new CountDownLatch(1);
90	>	Runnable task = new CheckedRunnable() {
91	>	public void realRun() {
92	>	done.countDown();
93	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis());
94	>	}};
95	>	Future<?> f = p.schedule(task, timeoutMillis(), MILLISECONDS);
96	>	await(done);
97	>	assertNull(f.get(LONG_DELAY_MS, MILLISECONDS));
98	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis());
99	>	}
100	>	}
101	>
102	>	/**
103	>	* scheduleAtFixedRate executes runnable after given initial delay
104	>	*/
105	>	public void testSchedule4() throws Exception {
106	>	final ScheduledThreadPoolExecutor p = new ScheduledThreadPoolExecutor(1);
107	>	try (PoolCleaner cleaner = cleaner(p)) {
108	>	final long startTime = System.nanoTime();
109	>	final CountDownLatch done = new CountDownLatch(1);
110	>	Runnable task = new CheckedRunnable() {
111	>	public void realRun() {
112	>	done.countDown();
113	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis());
114	>	}};
115	>	ScheduledFuture<?> f =
116	>	p.scheduleAtFixedRate(task, timeoutMillis(),
117	>	LONG_DELAY_MS, MILLISECONDS);
118	>	await(done);
119	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis());
120	>	f.cancel(true);
121	>	}
122	>	}
123	>
124	>	/**
125	>	* scheduleWithFixedDelay executes runnable after given initial delay
126	>	*/
127	>	public void testSchedule5() throws Exception {
128	>	final ScheduledThreadPoolExecutor p = new ScheduledThreadPoolExecutor(1);
129	>	try (PoolCleaner cleaner = cleaner(p)) {
130	>	final long startTime = System.nanoTime();
131	>	final CountDownLatch done = new CountDownLatch(1);
132	>	Runnable task = new CheckedRunnable() {
133	>	public void realRun() {
134	>	done.countDown();
135	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis());
136	>	}};
137	>	ScheduledFuture<?> f =
138	>	p.scheduleWithFixedDelay(task, timeoutMillis(),
139	>	LONG_DELAY_MS, MILLISECONDS);
140	>	await(done);
141	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis());
142	>	f.cancel(true);
143	>	}
144	>	}
145	>
146	>	static class RunnableCounter implements Runnable {
147	>	AtomicInteger count = new AtomicInteger(0);
148	>	public void run() { count.getAndIncrement(); }
149	>	}
150	>
151	>	/**
152	>	* scheduleAtFixedRate executes series of tasks at given rate.
153	>	* Eventually, it must hold that:
154	>	*   cycles - 1 <= elapsedMillis/delay < cycles
155	>	*/
156	>	public void testFixedRateSequence() throws InterruptedException {
157	>	final ScheduledThreadPoolExecutor p = new ScheduledThreadPoolExecutor(1);
158	>	try (PoolCleaner cleaner = cleaner(p)) {
159	>	for (int delay = 1; delay <= LONG_DELAY_MS; delay *= 3) {
160	>	final long startTime = System.nanoTime();
161	>	final int cycles = 8;
162	>	final CountDownLatch done = new CountDownLatch(cycles);
163	>	final Runnable task = new CheckedRunnable() {
164	>	public void realRun() { done.countDown(); }};
165	>	final ScheduledFuture<?> periodicTask =
166	>	p.scheduleAtFixedRate(task, 0, delay, MILLISECONDS);
167	>	final int totalDelayMillis = (cycles - 1) * delay;
168	>	await(done, totalDelayMillis + LONG_DELAY_MS);
169	>	periodicTask.cancel(true);
170	>	final long elapsedMillis = millisElapsedSince(startTime);
171	>	assertTrue(elapsedMillis >= totalDelayMillis);
172	>	if (elapsedMillis <= cycles * delay)
173	>	return;
174	>	// else retry with longer delay
175	>	}
176	>	fail("unexpected execution rate");
177	>	}
178	>	}
179	>
180	>	/**
181	>	* scheduleWithFixedDelay executes series of tasks with given period.
182	>	* Eventually, it must hold that each task starts at least delay and at
183	>	* most 2 * delay after the termination of the previous task.
184	>	*/
185	>	public void testFixedDelaySequence() throws InterruptedException {
186	>	final ScheduledThreadPoolExecutor p = new ScheduledThreadPoolExecutor(1);
187	>	try (PoolCleaner cleaner = cleaner(p)) {
188	>	for (int delay = 1; delay <= LONG_DELAY_MS; delay *= 3) {
189	>	final long startTime = System.nanoTime();
190	>	final AtomicLong previous = new AtomicLong(startTime);
191	>	final AtomicBoolean tryLongerDelay = new AtomicBoolean(false);
192	>	final int cycles = 8;
193	>	final CountDownLatch done = new CountDownLatch(cycles);
194	>	final int d = delay;
195	>	final Runnable task = new CheckedRunnable() {
196	>	public void realRun() {
197	>	long now = System.nanoTime();
198	>	long elapsedMillis
199	>	= NANOSECONDS.toMillis(now - previous.get());
200	>	if (done.getCount() == cycles) { // first execution
201	>	if (elapsedMillis >= d)
202	>	tryLongerDelay.set(true);
203	>	} else {
204	>	assertTrue(elapsedMillis >= d);
205	>	if (elapsedMillis >= 2 * d)
206	>	tryLongerDelay.set(true);
207	>	}
208	>	previous.set(now);
209	>	done.countDown();
210	>	}};
211	>	final ScheduledFuture<?> periodicTask =
212	>	p.scheduleWithFixedDelay(task, 0, delay, MILLISECONDS);
213	>	final int totalDelayMillis = (cycles - 1) * delay;
214	>	await(done, totalDelayMillis + cycles * LONG_DELAY_MS);
215	>	periodicTask.cancel(true);
216	>	final long elapsedMillis = millisElapsedSince(startTime);
217	>	assertTrue(elapsedMillis >= totalDelayMillis);
218	>	if (!tryLongerDelay.get())
219	>	return;
220	>	// else retry with longer delay
221	>	}
222	>	fail("unexpected execution rate");
223	>	}
224	>	}
225	>
226	>	/**
227	>	* Submitting null tasks throws NullPointerException
228	>	*/
229	>	public void testNullTaskSubmission() {
230	>	final ScheduledThreadPoolExecutor p = new ScheduledThreadPoolExecutor(1);
231	>	try (PoolCleaner cleaner = cleaner(p)) {
232	>	assertNullTaskSubmissionThrowsNullPointerException(p);
233	>	}
234	>	}
235	>
236	>	/**
237	>	* Submitted tasks are rejected when shutdown
238	>	*/
239	>	public void testSubmittedTasksRejectedWhenShutdown() throws InterruptedException {
240	>	final ScheduledThreadPoolExecutor p = new ScheduledThreadPoolExecutor(1);
241	>	final ThreadLocalRandom rnd = ThreadLocalRandom.current();
242	>	final CountDownLatch threadsStarted = new CountDownLatch(p.getCorePoolSize());
243	>	final CountDownLatch done = new CountDownLatch(1);
244	>	final Runnable r = () -> {
245	>	threadsStarted.countDown();
246	>	for (;;) {
247	>	try {
248	>	done.await();
249	>	return;
250	>	} catch (InterruptedException shutdownNowDeliberatelyIgnored) {}
251	>	}};
252	>	final Callable<Boolean> c = () -> {
253	>	threadsStarted.countDown();
254	>	for (;;) {
255	>	try {
256	>	done.await();
257	>	return Boolean.TRUE;
258	>	} catch (InterruptedException shutdownNowDeliberatelyIgnored) {}
259	>	}};
260	>
261	>	try (PoolCleaner cleaner = cleaner(p, done)) {
262	>	for (int i = p.getCorePoolSize(); i--> 0; ) {
263	>	switch (rnd.nextInt(4)) {
264	>	case 0: p.execute(r); break;
265	>	case 1: assertFalse(p.submit(r).isDone()); break;
266	>	case 2: assertFalse(p.submit(r, Boolean.TRUE).isDone()); break;
267	>	case 3: assertFalse(p.submit(c).isDone()); break;
268	>	}
269	>	}
270	>
271	>	// ScheduledThreadPoolExecutor has an unbounded queue, so never saturated.
272	>	await(threadsStarted);
273	>
274	>	if (rnd.nextBoolean())
275	>	p.shutdownNow();
276	>	else
277	>	p.shutdown();
278	>	// Pool is shutdown, but not yet terminated
279	>	assertTaskSubmissionsAreRejected(p);
280	>	assertFalse(p.isTerminated());
281	>
282	>	done.countDown();   // release blocking tasks
283	>	assertTrue(p.awaitTermination(LONG_DELAY_MS, MILLISECONDS));
284	>
285	>	assertTaskSubmissionsAreRejected(p);
286	>	}
287	>	assertEquals(p.getCorePoolSize(), p.getCompletedTaskCount());
288	>	}
289	>
290	>	/**
291	>	* getActiveCount increases but doesn't overestimate, when a
292	>	* thread becomes active
293	>	*/
294	>	public void testGetActiveCount() throws InterruptedException {
295	>	final CountDownLatch done = new CountDownLatch(1);
296	>	final ScheduledThreadPoolExecutor p = new ScheduledThreadPoolExecutor(2);
297	>	try (PoolCleaner cleaner = cleaner(p, done)) {
298	>	final CountDownLatch threadStarted = new CountDownLatch(1);
299	>	assertEquals(0, p.getActiveCount());
300	>	p.execute(new CheckedRunnable() {
301	>	public void realRun() throws InterruptedException {
302	>	threadStarted.countDown();
303	>	assertEquals(1, p.getActiveCount());
304	>	await(done);
305	>	}});
306	>	await(threadStarted);
307	>	assertEquals(1, p.getActiveCount());
308	>	}
309	>	}
310	>
311	>	/**
312	>	* getCompletedTaskCount increases, but doesn't overestimate,
313	>	* when tasks complete
314	>	*/
315	>	public void testGetCompletedTaskCount() throws InterruptedException {
316	>	final ThreadPoolExecutor p = new ScheduledThreadPoolExecutor(2);
317	>	try (PoolCleaner cleaner = cleaner(p)) {
318	>	final CountDownLatch threadStarted = new CountDownLatch(1);
319	>	final CountDownLatch threadProceed = new CountDownLatch(1);
320	>	final CountDownLatch threadDone = new CountDownLatch(1);
321	>	assertEquals(0, p.getCompletedTaskCount());
322	>	p.execute(new CheckedRunnable() {
323	>	public void realRun() throws InterruptedException {
324	>	threadStarted.countDown();
325	>	assertEquals(0, p.getCompletedTaskCount());
326	>	await(threadProceed);
327	>	threadDone.countDown();
328	>	}});
329	>	await(threadStarted);
330	>	assertEquals(0, p.getCompletedTaskCount());
331	>	threadProceed.countDown();
332	>	await(threadDone);
333	>	long startTime = System.nanoTime();
334	>	while (p.getCompletedTaskCount() != 1) {
335	>	if (millisElapsedSince(startTime) > LONG_DELAY_MS)
336	>	fail("timed out");
337	>	Thread.yield();
338	>	}
339	>	}
340	>	}
341	>
342	>	/**
343	>	* getCorePoolSize returns size given in constructor if not otherwise set
344	>	*/
345	>	public void testGetCorePoolSize() throws InterruptedException {
346	>	ThreadPoolExecutor p = new ScheduledThreadPoolExecutor(1);
347	>	try (PoolCleaner cleaner = cleaner(p)) {
348	>	assertEquals(1, p.getCorePoolSize());
349	>	}
350	>	}
351	>
352	>	/**
353	>	* getLargestPoolSize increases, but doesn't overestimate, when
354	>	* multiple threads active
355	>	*/
356	>	public void testGetLargestPoolSize() throws InterruptedException {
357	>	final int THREADS = 3;
358	>	final ThreadPoolExecutor p = new ScheduledThreadPoolExecutor(THREADS);
359	>	final CountDownLatch threadsStarted = new CountDownLatch(THREADS);
360	>	final CountDownLatch done = new CountDownLatch(1);
361	>	try (PoolCleaner cleaner = cleaner(p, done)) {
362	>	assertEquals(0, p.getLargestPoolSize());
363	>	for (int i = 0; i < THREADS; i++)
364	>	p.execute(new CheckedRunnable() {
365	>	public void realRun() throws InterruptedException {
366	>	threadsStarted.countDown();
367	>	await(done);
368	>	assertEquals(THREADS, p.getLargestPoolSize());
369	>	}});
370	>	await(threadsStarted);
371	>	assertEquals(THREADS, p.getLargestPoolSize());
372	>	}
373	>	assertEquals(THREADS, p.getLargestPoolSize());
374	>	}
375	>
376	>	/**
377	>	* getPoolSize increases, but doesn't overestimate, when threads
378	>	* become active
379	>	*/
380	>	public void testGetPoolSize() throws InterruptedException {
381	>	final ThreadPoolExecutor p = new ScheduledThreadPoolExecutor(1);
382	>	final CountDownLatch threadStarted = new CountDownLatch(1);
383	>	final CountDownLatch done = new CountDownLatch(1);
384	>	try (PoolCleaner cleaner = cleaner(p, done)) {
385	>	assertEquals(0, p.getPoolSize());
386	>	p.execute(new CheckedRunnable() {
387	>	public void realRun() throws InterruptedException {
388	>	threadStarted.countDown();
389	>	assertEquals(1, p.getPoolSize());
390	>	await(done);
391	>	}});
392	>	await(threadStarted);
393	>	assertEquals(1, p.getPoolSize());
394	>	}
395		}
396
397		/**
398	<	*  Test to verify schedule(Callable, long) throws RejectedExecutionException
399	<	*  This occurs on an attempt to schedule a task on a shutdown executor
400	<	*/
401	<	public void testSchedule3_RejectedExecutionException(){
402	<	try{
403	<	ScheduledExecutor se = new ScheduledExecutor(1);
404	<	se.shutdown();
405	<	se.schedule(new Callable(){
406	<	public Object call(){
407	<	return Boolean.TRUE;
398	>	* getTaskCount increases, but doesn't overestimate, when tasks
399	>	* submitted
400	>	*/
401	>	public void testGetTaskCount() throws InterruptedException {
402	>	final int TASKS = 3;
403	>	final CountDownLatch done = new CountDownLatch(1);
404	>	final ThreadPoolExecutor p = new ScheduledThreadPoolExecutor(1);
405	>	try (PoolCleaner cleaner = cleaner(p, done)) {
406	>	final CountDownLatch threadStarted = new CountDownLatch(1);
407	>	assertEquals(0, p.getTaskCount());
408	>	assertEquals(0, p.getCompletedTaskCount());
409	>	p.execute(new CheckedRunnable() {
410	>	public void realRun() throws InterruptedException {
411	>	threadStarted.countDown();
412	>	await(done);
413	>	}});
414	>	await(threadStarted);
415	>	assertEquals(1, p.getTaskCount());
416	>	assertEquals(0, p.getCompletedTaskCount());
417	>	for (int i = 0; i < TASKS; i++) {
418	>	assertEquals(1 + i, p.getTaskCount());
419	>	p.execute(new CheckedRunnable() {
420	>	public void realRun() throws InterruptedException {
421	>	threadStarted.countDown();
422	>	assertEquals(1 + TASKS, p.getTaskCount());
423	>	await(done);
424	>	}});
425	>	}
426	>	assertEquals(1 + TASKS, p.getTaskCount());
427	>	assertEquals(0, p.getCompletedTaskCount());
428	>	}
429	>	assertEquals(1 + TASKS, p.getTaskCount());
430	>	assertEquals(1 + TASKS, p.getCompletedTaskCount());
431	>	}
432	>
433	>	/**
434	>	* getThreadFactory returns factory in constructor if not set
435	>	*/
436	>	public void testGetThreadFactory() throws InterruptedException {
437	>	final ThreadFactory threadFactory = new SimpleThreadFactory();
438	>	final ScheduledThreadPoolExecutor p =
439	>	new ScheduledThreadPoolExecutor(1, threadFactory);
440	>	try (PoolCleaner cleaner = cleaner(p)) {
441	>	assertSame(threadFactory, p.getThreadFactory());
442	>	}
443	>	}
444	>
445	>	/**
446	>	* setThreadFactory sets the thread factory returned by getThreadFactory
447	>	*/
448	>	public void testSetThreadFactory() throws InterruptedException {
449	>	ThreadFactory threadFactory = new SimpleThreadFactory();
450	>	final ScheduledThreadPoolExecutor p = new ScheduledThreadPoolExecutor(1);
451	>	try (PoolCleaner cleaner = cleaner(p)) {
452	>	p.setThreadFactory(threadFactory);
453	>	assertSame(threadFactory, p.getThreadFactory());
454	>	}
455	>	}
456	>
457	>	/**
458	>	* setThreadFactory(null) throws NPE
459	>	*/
460	>	public void testSetThreadFactoryNull() throws InterruptedException {
461	>	final ScheduledThreadPoolExecutor p = new ScheduledThreadPoolExecutor(1);
462	>	try (PoolCleaner cleaner = cleaner(p)) {
463	>	try {
464	>	p.setThreadFactory(null);
465	>	shouldThrow();
466	>	} catch (NullPointerException success) {}
467	>	}
468	>	}
469	>
470	>	/**
471	>	* The default rejected execution handler is AbortPolicy.
472	>	*/
473	>	public void testDefaultRejectedExecutionHandler() {
474	>	final ScheduledThreadPoolExecutor p = new ScheduledThreadPoolExecutor(1);
475	>	try (PoolCleaner cleaner = cleaner(p)) {
476	>	assertTrue(p.getRejectedExecutionHandler()
477	>	instanceof ThreadPoolExecutor.AbortPolicy);
478	>	}
479	>	}
480	>
481	>	/**
482	>	* isShutdown is false before shutdown, true after
483	>	*/
484	>	public void testIsShutdown() {
485	>	final ScheduledThreadPoolExecutor p = new ScheduledThreadPoolExecutor(1);
486	>	assertFalse(p.isShutdown());
487	>	try (PoolCleaner cleaner = cleaner(p)) {
488	>	try {
489	>	p.shutdown();
490	>	assertTrue(p.isShutdown());
491	>	} catch (SecurityException ok) {}
492	>	}
493	>	}
494	>
495	>	/**
496	>	* isTerminated is false before termination, true after
497	>	*/
498	>	public void testIsTerminated() throws InterruptedException {
499	>	final ThreadPoolExecutor p = new ScheduledThreadPoolExecutor(1);
500	>	try (PoolCleaner cleaner = cleaner(p)) {
501	>	final CountDownLatch threadStarted = new CountDownLatch(1);
502	>	final CountDownLatch done = new CountDownLatch(1);
503	>	assertFalse(p.isTerminated());
504	>	p.execute(new CheckedRunnable() {
505	>	public void realRun() throws InterruptedException {
506	>	assertFalse(p.isTerminated());
507	>	threadStarted.countDown();
508	>	await(done);
509	>	}});
510	>	await(threadStarted);
511	>	assertFalse(p.isTerminating());
512	>	done.countDown();
513	>	try { p.shutdown(); } catch (SecurityException ok) { return; }
514	>	assertTrue(p.awaitTermination(LONG_DELAY_MS, MILLISECONDS));
515	>	assertTrue(p.isTerminated());
516	>	}
517	>	}
518	>
519	>	/**
520	>	* isTerminating is not true when running or when terminated
521	>	*/
522	>	public void testIsTerminating() throws InterruptedException {
523	>	final ThreadPoolExecutor p = new ScheduledThreadPoolExecutor(1);
524	>	final CountDownLatch threadStarted = new CountDownLatch(1);
525	>	final CountDownLatch done = new CountDownLatch(1);
526	>	try (PoolCleaner cleaner = cleaner(p)) {
527	>	assertFalse(p.isTerminating());
528	>	p.execute(new CheckedRunnable() {
529	>	public void realRun() throws InterruptedException {
530	>	assertFalse(p.isTerminating());
531	>	threadStarted.countDown();
532	>	await(done);
533	>	}});
534	>	await(threadStarted);
535	>	assertFalse(p.isTerminating());
536	>	done.countDown();
537	>	try { p.shutdown(); } catch (SecurityException ok) { return; }
538	>	assertTrue(p.awaitTermination(LONG_DELAY_MS, MILLISECONDS));
539	>	assertTrue(p.isTerminated());
540	>	assertFalse(p.isTerminating());
541	>	}
542	>	}
543	>
544	>	/**
545	>	* getQueue returns the work queue, which contains queued tasks
546	>	*/
547	>	public void testGetQueue() throws InterruptedException {
548	>	final CountDownLatch done = new CountDownLatch(1);
549	>	final ScheduledThreadPoolExecutor p = new ScheduledThreadPoolExecutor(1);
550	>	try (PoolCleaner cleaner = cleaner(p, done)) {
551	>	final CountDownLatch threadStarted = new CountDownLatch(1);
552	>	@SuppressWarnings("unchecked")
553	>	ScheduledFuture<?>[] tasks = (ScheduledFuture<?>[])new ScheduledFuture[5];
554	>	for (int i = 0; i < tasks.length; i++) {
555	>	Runnable r = new CheckedRunnable() {
556	>	public void realRun() throws InterruptedException {
557	>	threadStarted.countDown();
558	>	await(done);
559	>	}};
560	>	tasks[i] = p.schedule(r, 1, MILLISECONDS);
561	>	}
562	>	await(threadStarted);
563	>	BlockingQueue<Runnable> q = p.getQueue();
564	>	assertTrue(q.contains(tasks[tasks.length - 1]));
565	>	assertFalse(q.contains(tasks[0]));
566	>	}
567	>	}
568	>
569	>	/**
570	>	* remove(task) removes queued task, and fails to remove active task
571	>	*/
572	>	public void testRemove() throws InterruptedException {
573	>	final CountDownLatch done = new CountDownLatch(1);
574	>	final ScheduledThreadPoolExecutor p = new ScheduledThreadPoolExecutor(1);
575	>	try (PoolCleaner cleaner = cleaner(p, done)) {
576	>	@SuppressWarnings("unchecked")
577	>	ScheduledFuture<?>[] tasks = (ScheduledFuture<?>[])new ScheduledFuture[5];
578	>	final CountDownLatch threadStarted = new CountDownLatch(1);
579	>	for (int i = 0; i < tasks.length; i++) {
580	>	Runnable r = new CheckedRunnable() {
581	>	public void realRun() throws InterruptedException {
582	>	threadStarted.countDown();
583	>	await(done);
584	>	}};
585	>	tasks[i] = p.schedule(r, 1, MILLISECONDS);
586	>	}
587	>	await(threadStarted);
588	>	BlockingQueue<Runnable> q = p.getQueue();
589	>	assertFalse(p.remove((Runnable)tasks[0]));
590	>	assertTrue(q.contains((Runnable)tasks[4]));
591	>	assertTrue(q.contains((Runnable)tasks[3]));
592	>	assertTrue(p.remove((Runnable)tasks[4]));
593	>	assertFalse(p.remove((Runnable)tasks[4]));
594	>	assertFalse(q.contains((Runnable)tasks[4]));
595	>	assertTrue(q.contains((Runnable)tasks[3]));
596	>	assertTrue(p.remove((Runnable)tasks[3]));
597	>	assertFalse(q.contains((Runnable)tasks[3]));
598	>	}
599	>	}
600	>
601	>	/**
602	>	* purge eventually removes cancelled tasks from the queue
603	>	*/
604	>	public void testPurge() throws InterruptedException {
605	>	@SuppressWarnings("unchecked")
606	>	ScheduledFuture<?>[] tasks = (ScheduledFuture<?>[])new ScheduledFuture[5];
607	>	final Runnable releaser = new Runnable() { public void run() {
608	>	for (ScheduledFuture<?> task : tasks)
609	>	if (task != null) task.cancel(true); }};
610	>	final ScheduledThreadPoolExecutor p = new ScheduledThreadPoolExecutor(1);
611	>	try (PoolCleaner cleaner = cleaner(p, releaser)) {
612	>	for (int i = 0; i < tasks.length; i++)
613	>	tasks[i] = p.schedule(possiblyInterruptedRunnable(SMALL_DELAY_MS),
614	>	LONG_DELAY_MS, MILLISECONDS);
615	>	int max = tasks.length;
616	>	if (tasks[4].cancel(true)) --max;
617	>	if (tasks[3].cancel(true)) --max;
618	>	// There must eventually be an interference-free point at
619	>	// which purge will not fail. (At worst, when queue is empty.)
620	>	long startTime = System.nanoTime();
621	>	do {
622	>	p.purge();
623	>	long count = p.getTaskCount();
624	>	if (count == max)
625	>	return;
626	>	} while (millisElapsedSince(startTime) < LONG_DELAY_MS);
627	>	fail("Purge failed to remove cancelled tasks");
628	>	}
629	>	}
630	>
631	>	/**
632	>	* shutdownNow returns a list containing tasks that were not run,
633	>	* and those tasks are drained from the queue
634	>	*/
635	>	public void testShutdownNow() throws InterruptedException {
636	>	final int poolSize = 2;
637	>	final int count = 5;
638	>	final AtomicInteger ran = new AtomicInteger(0);
639	>	final ScheduledThreadPoolExecutor p =
640	>	new ScheduledThreadPoolExecutor(poolSize);
641	>	final CountDownLatch threadsStarted = new CountDownLatch(poolSize);
642	>	Runnable waiter = new CheckedRunnable() { public void realRun() {
643	>	threadsStarted.countDown();
644	>	try {
645	>	MILLISECONDS.sleep(LONGER_DELAY_MS);
646	>	} catch (InterruptedException success) {}
647	>	ran.getAndIncrement();
648	>	}};
649	>	for (int i = 0; i < count; i++)
650	>	p.execute(waiter);
651	>	await(threadsStarted);
652	>	assertEquals(poolSize, p.getActiveCount());
653	>	assertEquals(0, p.getCompletedTaskCount());
654	>	final List<Runnable> queuedTasks;
655	>	try {
656	>	queuedTasks = p.shutdownNow();
657	>	} catch (SecurityException ok) {
658	>	return; // Allowed in case test doesn't have privs
659	>	}
660	>	assertTrue(p.isShutdown());
661	>	assertTrue(p.getQueue().isEmpty());
662	>	assertEquals(count - poolSize, queuedTasks.size());
663	>	assertTrue(p.awaitTermination(LONG_DELAY_MS, MILLISECONDS));
664	>	assertTrue(p.isTerminated());
665	>	assertEquals(poolSize, ran.get());
666	>	assertEquals(poolSize, p.getCompletedTaskCount());
667	>	}
668	>
669	>	/**
670	>	* shutdownNow returns a list containing tasks that were not run,
671	>	* and those tasks are drained from the queue
672	>	*/
673	>	public void testShutdownNow_delayedTasks() throws InterruptedException {
674	>	final ScheduledThreadPoolExecutor p = new ScheduledThreadPoolExecutor(1);
675	>	List<ScheduledFuture<?>> tasks = new ArrayList<>();
676	>	for (int i = 0; i < 3; i++) {
677	>	Runnable r = new NoOpRunnable();
678	>	tasks.add(p.schedule(r, 9, SECONDS));
679	>	tasks.add(p.scheduleAtFixedRate(r, 9, 9, SECONDS));
680	>	tasks.add(p.scheduleWithFixedDelay(r, 9, 9, SECONDS));
681	>	}
682	>	if (testImplementationDetails)
683	>	assertEquals(new HashSet<Object>(tasks), new HashSet<Object>(p.getQueue()));
684	>	final List<Runnable> queuedTasks;
685	>	try {
686	>	queuedTasks = p.shutdownNow();
687	>	} catch (SecurityException ok) {
688	>	return; // Allowed in case test doesn't have privs
689	>	}
690	>	assertTrue(p.isShutdown());
691	>	assertTrue(p.getQueue().isEmpty());
692	>	if (testImplementationDetails)
693	>	assertEquals(new HashSet<Object>(tasks), new HashSet<Object>(queuedTasks));
694	>	assertEquals(tasks.size(), queuedTasks.size());
695	>	for (ScheduledFuture<?> task : tasks) {
696	>	assertFalse(task.isDone());
697	>	assertFalse(task.isCancelled());
698	>	}
699	>	assertTrue(p.awaitTermination(LONG_DELAY_MS, MILLISECONDS));
700	>	assertTrue(p.isTerminated());
701	>	}
702	>
703	>	/**
704	>	* By default, periodic tasks are cancelled at shutdown.
705	>	* By default, delayed tasks keep running after shutdown.
706	>	* Check that changing the default values work:
707	>	* - setExecuteExistingDelayedTasksAfterShutdownPolicy
708	>	* - setContinueExistingPeriodicTasksAfterShutdownPolicy
709	>	*/
710	>	@SuppressWarnings("FutureReturnValueIgnored")
711	>	public void testShutdown_cancellation() throws Exception {
712	>	final int poolSize = 4;
713	>	final ScheduledThreadPoolExecutor p
714	>	= new ScheduledThreadPoolExecutor(poolSize);
715	>	final BlockingQueue<Runnable> q = p.getQueue();
716	>	final ThreadLocalRandom rnd = ThreadLocalRandom.current();
717	>	final long delay = rnd.nextInt(2);
718	>	final int rounds = rnd.nextInt(1, 3);
719	>	final boolean effectiveDelayedPolicy;
720	>	final boolean effectivePeriodicPolicy;
721	>	final boolean effectiveRemovePolicy;
722	>
723	>	if (rnd.nextBoolean())
724	>	p.setExecuteExistingDelayedTasksAfterShutdownPolicy(
725	>	effectiveDelayedPolicy = rnd.nextBoolean());
726	>	else
727	>	effectiveDelayedPolicy = true;
728	>	assertEquals(effectiveDelayedPolicy,
729	>	p.getExecuteExistingDelayedTasksAfterShutdownPolicy());
730	>
731	>	if (rnd.nextBoolean())
732	>	p.setContinueExistingPeriodicTasksAfterShutdownPolicy(
733	>	effectivePeriodicPolicy = rnd.nextBoolean());
734	>	else
735	>	effectivePeriodicPolicy = false;
736	>	assertEquals(effectivePeriodicPolicy,
737	>	p.getContinueExistingPeriodicTasksAfterShutdownPolicy());
738	>
739	>	if (rnd.nextBoolean())
740	>	p.setRemoveOnCancelPolicy(
741	>	effectiveRemovePolicy = rnd.nextBoolean());
742	>	else
743	>	effectiveRemovePolicy = false;
744	>	assertEquals(effectiveRemovePolicy,
745	>	p.getRemoveOnCancelPolicy());
746	>
747	>	final boolean periodicTasksContinue = effectivePeriodicPolicy && rnd.nextBoolean();
748	>
749	>	// Strategy: Wedge the pool with one wave of "blocker" tasks,
750	>	// then add a second wave that waits in the queue until unblocked.
751	>	final AtomicInteger ran = new AtomicInteger(0);
752	>	final CountDownLatch poolBlocked = new CountDownLatch(poolSize);
753	>	final CountDownLatch unblock = new CountDownLatch(1);
754	>	final RuntimeException exception = new RuntimeException();
755	>
756	>	class Task implements Runnable {
757	>	public void run() {
758	>	try {
759	>	ran.getAndIncrement();
760	>	poolBlocked.countDown();
761	>	await(unblock);
762	>	} catch (Throwable fail) { threadUnexpectedException(fail); }
763	>	}
764	>	}
765	>
766	>	class PeriodicTask extends Task {
767	>	PeriodicTask(int rounds) { this.rounds = rounds; }
768	>	int rounds;
769	>	public void run() {
770	>	if (--rounds == 0) super.run();
771	>	// throw exception to surely terminate this periodic task,
772	>	// but in a separate execution and in a detectable way.
773	>	if (rounds == -1) throw exception;
774	>	}
775	>	}
776	>
777	>	Runnable task = new Task();
778	>
779	>	List<Future<?>> immediates = new ArrayList<>();
780	>	List<Future<?>> delayeds   = new ArrayList<>();
781	>	List<Future<?>> periodics  = new ArrayList<>();
782	>
783	>	immediates.add(p.submit(task));
784	>	delayeds.add(p.schedule(task, delay, MILLISECONDS));
785	>	periodics.add(p.scheduleAtFixedRate(
786	>	new PeriodicTask(rounds), delay, 1, MILLISECONDS));
787	>	periodics.add(p.scheduleWithFixedDelay(
788	>	new PeriodicTask(rounds), delay, 1, MILLISECONDS));
789	>
790	>	await(poolBlocked);
791	>
792	>	assertEquals(poolSize, ran.get());
793	>	assertEquals(poolSize, p.getActiveCount());
794	>	assertTrue(q.isEmpty());
795	>
796	>	// Add second wave of tasks.
797	>	immediates.add(p.submit(task));
798	>	delayeds.add(p.schedule(task, effectiveDelayedPolicy ? delay : LONG_DELAY_MS, MILLISECONDS));
799	>	periodics.add(p.scheduleAtFixedRate(
800	>	new PeriodicTask(rounds), delay, 1, MILLISECONDS));
801	>	periodics.add(p.scheduleWithFixedDelay(
802	>	new PeriodicTask(rounds), delay, 1, MILLISECONDS));
803	>
804	>	assertEquals(poolSize, q.size());
805	>	assertEquals(poolSize, ran.get());
806	>
807	>	immediates.forEach(
808	>	f -> assertTrue(((ScheduledFuture)f).getDelay(NANOSECONDS) <= 0L));
809	>
810	>	Stream.of(immediates, delayeds, periodics).flatMap(Collection::stream)
811	>	.forEach(f -> assertFalse(f.isDone()));
812	>
813	>	try { p.shutdown(); } catch (SecurityException ok) { return; }
814	>	assertTrue(p.isShutdown());
815	>	assertTrue(p.isTerminating());
816	>	assertFalse(p.isTerminated());
817	>
818	>	if (rnd.nextBoolean())
819	>	assertThrows(
820	>	RejectedExecutionException.class,
821	>	() -> p.submit(task),
822	>	() -> p.schedule(task, 1, SECONDS),
823	>	() -> p.scheduleAtFixedRate(
824	>	new PeriodicTask(1), 1, 1, SECONDS),
825	>	() -> p.scheduleWithFixedDelay(
826	>	new PeriodicTask(2), 1, 1, SECONDS));
827	>
828	>	assertTrue(q.contains(immediates.get(1)));
829	>	assertTrue(!effectiveDelayedPolicy
830	>	^ q.contains(delayeds.get(1)));
831	>	assertTrue(!effectivePeriodicPolicy
832	>	^ q.containsAll(periodics.subList(2, 4)));
833	>
834	>	immediates.forEach(f -> assertFalse(f.isDone()));
835	>
836	>	assertFalse(delayeds.get(0).isDone());
837	>	if (effectiveDelayedPolicy)
838	>	assertFalse(delayeds.get(1).isDone());
839	>	else
840	>	assertTrue(delayeds.get(1).isCancelled());
841	>
842	>	if (effectivePeriodicPolicy)
843	>	periodics.forEach(
844	>	f -> {
845	>	assertFalse(f.isDone());
846	>	if (!periodicTasksContinue) {
847	>	assertTrue(f.cancel(false));
848	>	assertTrue(f.isCancelled());
849	>	}
850	>	});
851	>	else {
852	>	periodics.subList(0, 2).forEach(f -> assertFalse(f.isDone()));
853	>	periodics.subList(2, 4).forEach(f -> assertTrue(f.isCancelled()));
854	>	}
855	>
856	>	unblock.countDown();    // Release all pool threads
857	>
858	>	assertTrue(p.awaitTermination(LONG_DELAY_MS, MILLISECONDS));
859	>	assertFalse(p.isTerminating());
860	>	assertTrue(p.isTerminated());
861	>
862	>	assertTrue(q.isEmpty());
863	>
864	>	Stream.of(immediates, delayeds, periodics).flatMap(Collection::stream)
865	>	.forEach(f -> assertTrue(f.isDone()));
866	>
867	>	for (Future<?> f : immediates) assertNull(f.get());
868	>
869	>	assertNull(delayeds.get(0).get());
870	>	if (effectiveDelayedPolicy)
871	>	assertNull(delayeds.get(1).get());
872	>	else
873	>	assertTrue(delayeds.get(1).isCancelled());
874	>
875	>	if (periodicTasksContinue)
876	>	periodics.forEach(
877	>	f -> {
878	>	try { f.get(); }
879	>	catch (ExecutionException success) {
880	>	assertSame(exception, success.getCause());
881		}
882	<	},  10000, TimeUnit.MILLISECONDS);
180	<	fail("should throw");
181	<	}catch(RejectedExecutionException e){}
182	<	}
183	<
184	<	/**
185	<	*  Test to verify scheduleAtFixedRate(Runnable, long, long, TimeUnit) throws
186	<	*  RejectedExecutionException.
187	<	*  This occurs on an attempt to schedule a task on a shutdown executor
188	<	*/
189	<	public void testScheduleAtFixedRate1_RejectedExecutionException(){
190	<	try{
191	<	ScheduledExecutor se = new ScheduledExecutor(1);
192	<	se.shutdown();
193	<	se.scheduleAtFixedRate(new Runnable(){
194	<	public void run(){}
195	<	}, 100, 100, TimeUnit.SECONDS);
196	<	fail("should throw");
197	<	}catch(RejectedExecutionException e){}
198	<	}
199	<
200	<	/**
201	<	*  Test to verify scheduleAtFixedRate(Runnable, long, long, TimeUnit) throws
202	<	*  RejectedExecutionException.
203	<	*  This occurs on an attempt to schedule a task on a shutdown executor
204	<	*/
205	<	public void testScheduleAtFixedRate2_RejectedExecutionException(){
206	<	try{
207	<	ScheduledExecutor se = new ScheduledExecutor(1);
208	<	se.shutdown();
209	<	se.scheduleAtFixedRate(new Runnable(){
210	<	public void run(){}
211	<	},  1, 100, TimeUnit.SECONDS);
212	<	fail("should throw");
213	<	}catch(RejectedExecutionException e){}
214	<	}
215	<
216	<	/**
217	<	*  Test to verify scheduleWithFixedDelay(Runnable, long, long, TimeUnit) throws
218	<	*  RejectedExecutionException.
219	<	*  This occurs on an attempt to schedule a task on a shutdown executor
220	<	*/
221	<	public void testScheduleWithFixedDelay1_RejectedExecutionException(){
222	<	try{
223	<	ScheduledExecutor se = new ScheduledExecutor(1);
224	<	se.shutdown();
225	<	se.scheduleWithFixedDelay(new Runnable(){
226	<	public void run(){}
227	<	}, 100, 100, TimeUnit.SECONDS);
228	<	fail("should throw");
229	<	}catch(RejectedExecutionException e){}
230	<	}
231	<
232	<	/**
233	<	*  Test to verify scheduleWithFixedDelay(Runnable, long, long, TimeUnit) throws
234	<	*  RejectedExecutionException.
235	<	*  This occurs on an attempt to schedule a task on a shutdown executor
236	<	*/
237	<	public void testScheduleWithFixedDelay2_RejectedExecutionException(){
238	<	try{
239	<	ScheduledExecutor se = new ScheduledExecutor(1);
240	<	se.shutdown();
241	<	se.scheduleWithFixedDelay(new Runnable(){
242	<	public void run(){}
243	<	},  1, 100, TimeUnit.SECONDS);
244	<	fail("should throw");
245	<	}catch(RejectedExecutionException e){}
246	<	}
247	<
248	<	/**
249	<	*  Test to verify execute throws RejectedExecutionException
250	<	*  This occurs on an attempt to schedule a task on a shutdown executor
251	<	*/
252	<	public void testExecute_RejectedExecutionException(){
253	<	try{
254	<	ScheduledExecutor se = new ScheduledExecutor(1);
255	<	se.shutdown();
256	<	se.execute(new Runnable(){
257	<	public void run(){}
882	>	catch (Throwable fail) { threadUnexpectedException(fail); }
883		});
884	<	fail("should throw");
885	<	}catch(RejectedExecutionException e){}
884	>	else
885	>	periodics.forEach(f -> assertTrue(f.isCancelled()));
886	>
887	>	assertEquals(poolSize + 1
888	>	+ (effectiveDelayedPolicy ? 1 : 0)
889	>	+ (periodicTasksContinue ? 2 : 0),
890	>	ran.get());
891	>	}
892	>
893	>	/**
894	>	* completed submit of callable returns result
895	>	*/
896	>	public void testSubmitCallable() throws Exception {
897	>	final ExecutorService e = new ScheduledThreadPoolExecutor(2);
898	>	try (PoolCleaner cleaner = cleaner(e)) {
899	>	Future<String> future = e.submit(new StringTask());
900	>	String result = future.get();
901	>	assertSame(TEST_STRING, result);
902	>	}
903	>	}
904	>
905	>	/**
906	>	* completed submit of runnable returns successfully
907	>	*/
908	>	public void testSubmitRunnable() throws Exception {
909	>	final ExecutorService e = new ScheduledThreadPoolExecutor(2);
910	>	try (PoolCleaner cleaner = cleaner(e)) {
911	>	Future<?> future = e.submit(new NoOpRunnable());
912	>	future.get();
913	>	assertTrue(future.isDone());
914	>	}
915	>	}
916	>
917	>	/**
918	>	* completed submit of (runnable, result) returns result
919	>	*/
920	>	public void testSubmitRunnable2() throws Exception {
921	>	final ExecutorService e = new ScheduledThreadPoolExecutor(2);
922	>	try (PoolCleaner cleaner = cleaner(e)) {
923	>	Future<String> future = e.submit(new NoOpRunnable(), TEST_STRING);
924	>	String result = future.get();
925	>	assertSame(TEST_STRING, result);
926	>	}
927	>	}
928	>
929	>	/**
930	>	* invokeAny(null) throws NullPointerException
931	>	*/
932	>	public void testInvokeAny1() throws Exception {
933	>	final ExecutorService e = new ScheduledThreadPoolExecutor(2);
934	>	try (PoolCleaner cleaner = cleaner(e)) {
935	>	try {
936	>	e.invokeAny(null);
937	>	shouldThrow();
938	>	} catch (NullPointerException success) {}
939	>	}
940	>	}
941	>
942	>	/**
943	>	* invokeAny(empty collection) throws IllegalArgumentException
944	>	*/
945	>	public void testInvokeAny2() throws Exception {
946	>	final ExecutorService e = new ScheduledThreadPoolExecutor(2);
947	>	try (PoolCleaner cleaner = cleaner(e)) {
948	>	try {
949	>	e.invokeAny(new ArrayList<Callable<String>>());
950	>	shouldThrow();
951	>	} catch (IllegalArgumentException success) {}
952	>	}
953	>	}
954	>
955	>	/**
956	>	* invokeAny(c) throws NullPointerException if c has null elements
957	>	*/
958	>	public void testInvokeAny3() throws Exception {
959	>	CountDownLatch latch = new CountDownLatch(1);
960	>	final ExecutorService e = new ScheduledThreadPoolExecutor(2);
961	>	try (PoolCleaner cleaner = cleaner(e)) {
962	>	List<Callable<String>> l = new ArrayList<>();
963	>	l.add(latchAwaitingStringTask(latch));
964	>	l.add(null);
965	>	try {
966	>	e.invokeAny(l);
967	>	shouldThrow();
968	>	} catch (NullPointerException success) {}
969	>	latch.countDown();
970	>	}
971	>	}
972	>
973	>	/**
974	>	* invokeAny(c) throws ExecutionException if no task completes
975	>	*/
976	>	public void testInvokeAny4() throws Exception {
977	>	final ExecutorService e = new ScheduledThreadPoolExecutor(2);
978	>	try (PoolCleaner cleaner = cleaner(e)) {
979	>	List<Callable<String>> l = new ArrayList<>();
980	>	l.add(new NPETask());
981	>	try {
982	>	e.invokeAny(l);
983	>	shouldThrow();
984	>	} catch (ExecutionException success) {
985	>	assertTrue(success.getCause() instanceof NullPointerException);
986	>	}
987	>	}
988	>	}
989	>
990	>	/**
991	>	* invokeAny(c) returns result of some task
992	>	*/
993	>	public void testInvokeAny5() 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 StringTask());
998	>	l.add(new StringTask());
999	>	String result = e.invokeAny(l);
1000	>	assertSame(TEST_STRING, result);
1001	>	}
1002	>	}
1003	>
1004	>	/**
1005	>	* invokeAll(null) throws NPE
1006	>	*/
1007	>	public void testInvokeAll1() throws Exception {
1008	>	final ExecutorService e = new ScheduledThreadPoolExecutor(2);
1009	>	try (PoolCleaner cleaner = cleaner(e)) {
1010	>	try {
1011	>	e.invokeAll(null);
1012	>	shouldThrow();
1013	>	} catch (NullPointerException success) {}
1014	>	}
1015	>	}
1016	>
1017	>	/**
1018	>	* invokeAll(empty collection) returns empty list
1019	>	*/
1020	>	public void testInvokeAll2() throws Exception {
1021	>	final ExecutorService e = new ScheduledThreadPoolExecutor(2);
1022	>	final Collection<Callable<String>> emptyCollection
1023	>	= Collections.emptyList();
1024	>	try (PoolCleaner cleaner = cleaner(e)) {
1025	>	List<Future<String>> r = e.invokeAll(emptyCollection);
1026	>	assertTrue(r.isEmpty());
1027	>	}
1028	>	}
1029	>
1030	>	/**
1031	>	* invokeAll(c) throws NPE if c has null elements
1032	>	*/
1033	>	public void testInvokeAll3() throws Exception {
1034	>	final ExecutorService e = new ScheduledThreadPoolExecutor(2);
1035	>	try (PoolCleaner cleaner = cleaner(e)) {
1036	>	List<Callable<String>> l = new ArrayList<>();
1037	>	l.add(new StringTask());
1038	>	l.add(null);
1039	>	try {
1040	>	e.invokeAll(l);
1041	>	shouldThrow();
1042	>	} catch (NullPointerException success) {}
1043	>	}
1044	>	}
1045	>
1046	>	/**
1047	>	* get of invokeAll(c) throws exception on failed task
1048	>	*/
1049	>	public void testInvokeAll4() throws Exception {
1050	>	final ExecutorService e = new ScheduledThreadPoolExecutor(2);
1051	>	try (PoolCleaner cleaner = cleaner(e)) {
1052	>	List<Callable<String>> l = new ArrayList<>();
1053	>	l.add(new NPETask());
1054	>	List<Future<String>> futures = e.invokeAll(l);
1055	>	assertEquals(1, futures.size());
1056	>	try {
1057	>	futures.get(0).get();
1058	>	shouldThrow();
1059	>	} catch (ExecutionException success) {
1060	>	assertTrue(success.getCause() instanceof NullPointerException);
1061	>	}
1062	>	}
1063	>	}
1064	>
1065	>	/**
1066	>	* invokeAll(c) returns results of all completed tasks
1067	>	*/
1068	>	public void testInvokeAll5() throws Exception {
1069	>	final ExecutorService e = new ScheduledThreadPoolExecutor(2);
1070	>	try (PoolCleaner cleaner = cleaner(e)) {
1071	>	List<Callable<String>> l = new ArrayList<>();
1072	>	l.add(new StringTask());
1073	>	l.add(new StringTask());
1074	>	List<Future<String>> futures = e.invokeAll(l);
1075	>	assertEquals(2, futures.size());
1076	>	for (Future<String> future : futures)
1077	>	assertSame(TEST_STRING, future.get());
1078	>	}
1079	>	}
1080	>
1081	>	/**
1082	>	* timed invokeAny(null) throws NPE
1083	>	*/
1084	>	public void testTimedInvokeAny1() throws Exception {
1085	>	final ExecutorService e = new ScheduledThreadPoolExecutor(2);
1086	>	try (PoolCleaner cleaner = cleaner(e)) {
1087	>	try {
1088	>	e.invokeAny(null, randomTimeout(), randomTimeUnit());
1089	>	shouldThrow();
1090	>	} catch (NullPointerException success) {}
1091	>	}
1092	>	}
1093	>
1094	>	/**
1095	>	* timed invokeAny(,,null) throws NullPointerException
1096	>	*/
1097	>	public void testTimedInvokeAnyNullTimeUnit() throws Exception {
1098	>	final ExecutorService e = new ScheduledThreadPoolExecutor(2);
1099	>	try (PoolCleaner cleaner = cleaner(e)) {
1100	>	List<Callable<String>> l = new ArrayList<>();
1101	>	l.add(new StringTask());
1102	>	try {
1103	>	e.invokeAny(l, randomTimeout(), null);
1104	>	shouldThrow();
1105	>	} catch (NullPointerException success) {}
1106	>	}
1107	>	}
1108	>
1109	>	/**
1110	>	* timed invokeAny(empty collection) throws IllegalArgumentException
1111	>	*/
1112	>	public void testTimedInvokeAny2() throws Exception {
1113	>	final ExecutorService e = new ScheduledThreadPoolExecutor(2);
1114	>	final Collection<Callable<String>> emptyCollection
1115	>	= Collections.emptyList();
1116	>	try (PoolCleaner cleaner = cleaner(e)) {
1117	>	try {
1118	>	e.invokeAny(emptyCollection, randomTimeout(), randomTimeUnit());
1119	>	shouldThrow();
1120	>	} catch (IllegalArgumentException success) {}
1121	>	}
1122	>	}
1123	>
1124	>	/**
1125	>	* timed invokeAny(c) throws NPE if c has null elements
1126	>	*/
1127	>	public void testTimedInvokeAny3() throws Exception {
1128	>	CountDownLatch latch = new CountDownLatch(1);
1129	>	final ExecutorService e = new ScheduledThreadPoolExecutor(2);
1130	>	try (PoolCleaner cleaner = cleaner(e)) {
1131	>	List<Callable<String>> l = new ArrayList<>();
1132	>	l.add(latchAwaitingStringTask(latch));
1133	>	l.add(null);
1134	>	try {
1135	>	e.invokeAny(l, randomTimeout(), randomTimeUnit());
1136	>	shouldThrow();
1137	>	} catch (NullPointerException success) {}
1138	>	latch.countDown();
1139	>	}
1140	>	}
1141	>
1142	>	/**
1143	>	* timed invokeAny(c) throws ExecutionException if no task completes
1144	>	*/
1145	>	public void testTimedInvokeAny4() throws Exception {
1146	>	final ExecutorService e = new ScheduledThreadPoolExecutor(2);
1147	>	try (PoolCleaner cleaner = cleaner(e)) {
1148	>	long startTime = System.nanoTime();
1149	>	List<Callable<String>> l = new ArrayList<>();
1150	>	l.add(new NPETask());
1151	>	try {
1152	>	e.invokeAny(l, LONG_DELAY_MS, MILLISECONDS);
1153	>	shouldThrow();
1154	>	} catch (ExecutionException success) {
1155	>	assertTrue(success.getCause() instanceof NullPointerException);
1156	>	}
1157	>	assertTrue(millisElapsedSince(startTime) < LONG_DELAY_MS);
1158	>	}
1159	>	}
1160	>
1161	>	/**
1162	>	* timed invokeAny(c) returns result of some task
1163	>	*/
1164	>	public void testTimedInvokeAny5() throws Exception {
1165	>	final ExecutorService e = new ScheduledThreadPoolExecutor(2);
1166	>	try (PoolCleaner cleaner = cleaner(e)) {
1167	>	long startTime = System.nanoTime();
1168	>	List<Callable<String>> l = new ArrayList<>();
1169	>	l.add(new StringTask());
1170	>	l.add(new StringTask());
1171	>	String result = e.invokeAny(l, LONG_DELAY_MS, MILLISECONDS);
1172	>	assertSame(TEST_STRING, result);
1173	>	assertTrue(millisElapsedSince(startTime) < LONG_DELAY_MS);
1174	>	}
1175	>	}
1176	>
1177	>	/**
1178	>	* timed invokeAll(null) throws NPE
1179	>	*/
1180	>	public void testTimedInvokeAll1() throws Exception {
1181	>	final ExecutorService e = new ScheduledThreadPoolExecutor(2);
1182	>	try (PoolCleaner cleaner = cleaner(e)) {
1183	>	try {
1184	>	e.invokeAll(null, randomTimeout(), randomTimeUnit());
1185	>	shouldThrow();
1186	>	} catch (NullPointerException success) {}
1187	>	}
1188	>	}
1189	>
1190	>	/**
1191	>	* timed invokeAll(,,null) throws NPE
1192	>	*/
1193	>	public void testTimedInvokeAllNullTimeUnit() throws Exception {
1194	>	final ExecutorService e = new ScheduledThreadPoolExecutor(2);
1195	>	try (PoolCleaner cleaner = cleaner(e)) {
1196	>	List<Callable<String>> l = new ArrayList<>();
1197	>	l.add(new StringTask());
1198	>	try {
1199	>	e.invokeAll(l, randomTimeout(), null);
1200	>	shouldThrow();
1201	>	} catch (NullPointerException success) {}
1202	>	}
1203	>	}
1204	>
1205	>	/**
1206	>	* timed invokeAll(empty collection) returns empty list
1207	>	*/
1208	>	public void testTimedInvokeAll2() throws Exception {
1209	>	final ExecutorService e = new ScheduledThreadPoolExecutor(2);
1210	>	final Collection<Callable<String>> emptyCollection
1211	>	= Collections.emptyList();
1212	>	try (PoolCleaner cleaner = cleaner(e)) {
1213	>	List<Future<String>> r =
1214	>	e.invokeAll(emptyCollection, randomTimeout(), randomTimeUnit());
1215	>	assertTrue(r.isEmpty());
1216	>	}
1217	>	}
1218	>
1219	>	/**
1220	>	* timed invokeAll(c) throws NPE if c has null elements
1221	>	*/
1222	>	public void testTimedInvokeAll3() throws Exception {
1223	>	final ExecutorService e = new ScheduledThreadPoolExecutor(2);
1224	>	try (PoolCleaner cleaner = cleaner(e)) {
1225	>	List<Callable<String>> l = new ArrayList<>();
1226	>	l.add(new StringTask());
1227	>	l.add(null);
1228	>	try {
1229	>	e.invokeAll(l, randomTimeout(), randomTimeUnit());
1230	>	shouldThrow();
1231	>	} catch (NullPointerException success) {}
1232	>	}
1233	>	}
1234	>
1235	>	/**
1236	>	* get of element of invokeAll(c) throws exception on failed task
1237	>	*/
1238	>	public void testTimedInvokeAll4() throws Exception {
1239	>	final ExecutorService e = new ScheduledThreadPoolExecutor(2);
1240	>	try (PoolCleaner cleaner = cleaner(e)) {
1241	>	List<Callable<String>> l = new ArrayList<>();
1242	>	l.add(new NPETask());
1243	>	List<Future<String>> futures =
1244	>	e.invokeAll(l, LONG_DELAY_MS, MILLISECONDS);
1245	>	assertEquals(1, futures.size());
1246	>	try {
1247	>	futures.get(0).get();
1248	>	shouldThrow();
1249	>	} catch (ExecutionException success) {
1250	>	assertTrue(success.getCause() instanceof NullPointerException);
1251	>	}
1252	>	}
1253	>	}
1254	>
1255	>	/**
1256	>	* timed invokeAll(c) returns results of all completed tasks
1257	>	*/
1258	>	public void testTimedInvokeAll5() throws Exception {
1259	>	final ExecutorService e = new ScheduledThreadPoolExecutor(2);
1260	>	try (PoolCleaner cleaner = cleaner(e)) {
1261	>	List<Callable<String>> l = new ArrayList<>();
1262	>	l.add(new StringTask());
1263	>	l.add(new StringTask());
1264	>	List<Future<String>> futures =
1265	>	e.invokeAll(l, LONG_DELAY_MS, MILLISECONDS);
1266	>	assertEquals(2, futures.size());
1267	>	for (Future<String> future : futures)
1268	>	assertSame(TEST_STRING, future.get());
1269	>	}
1270	>	}
1271	>
1272	>	/**
1273	>	* timed invokeAll(c) cancels tasks not completed by timeout
1274	>	*/
1275	>	public void testTimedInvokeAll6() throws Exception {
1276	>	for (long timeout = timeoutMillis();;) {
1277	>	final CountDownLatch done = new CountDownLatch(1);
1278	>	final Callable<String> waiter = new CheckedCallable<String>() {
1279	>	public String realCall() {
1280	>	try { done.await(LONG_DELAY_MS, MILLISECONDS); }
1281	>	catch (InterruptedException ok) {}
1282	>	return "1"; }};
1283	>	final ExecutorService p = new ScheduledThreadPoolExecutor(2);
1284	>	try (PoolCleaner cleaner = cleaner(p, done)) {
1285	>	List<Callable<String>> tasks = new ArrayList<>();
1286	>	tasks.add(new StringTask("0"));
1287	>	tasks.add(waiter);
1288	>	tasks.add(new StringTask("2"));
1289	>	long startTime = System.nanoTime();
1290	>	List<Future<String>> futures =
1291	>	p.invokeAll(tasks, timeout, MILLISECONDS);
1292	>	assertEquals(tasks.size(), futures.size());
1293	>	assertTrue(millisElapsedSince(startTime) >= timeout);
1294	>	for (Future<?> future : futures)
1295	>	assertTrue(future.isDone());
1296	>	assertTrue(futures.get(1).isCancelled());
1297	>	try {
1298	>	assertEquals("0", futures.get(0).get());
1299	>	assertEquals("2", futures.get(2).get());
1300	>	break;
1301	>	} catch (CancellationException retryWithLongerTimeout) {
1302	>	timeout *= 2;
1303	>	if (timeout >= LONG_DELAY_MS / 2)
1304	>	fail("expected exactly one task to be cancelled");
1305	>	}
1306	>	}
1307	>	}
1308	>	}
1309	>
1310	>	/**
1311	>	* A fixed delay task with overflowing period should not prevent a
1312	>	* one-shot task from executing.
1313	>	* https://bugs.openjdk.java.net/browse/JDK-8051859
1314	>	*/
1315	>	@SuppressWarnings("FutureReturnValueIgnored")
1316	>	public void testScheduleWithFixedDelay_overflow() throws Exception {
1317	>	final CountDownLatch delayedDone = new CountDownLatch(1);
1318	>	final CountDownLatch immediateDone = new CountDownLatch(1);
1319	>	final ScheduledThreadPoolExecutor p = new ScheduledThreadPoolExecutor(1);
1320	>	try (PoolCleaner cleaner = cleaner(p)) {
1321	>	final Runnable delayed = () -> {
1322	>	delayedDone.countDown();
1323	>	p.submit(() -> immediateDone.countDown());
1324	>	};
1325	>	p.scheduleWithFixedDelay(delayed, 0L, Long.MAX_VALUE, SECONDS);
1326	>	await(delayedDone);
1327	>	await(immediateDone);
1328	>	}
1329		}
1330
1331		}

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