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

Comparing jsr166/src/test/tck/ScheduledExecutorTest.java (file contents):
Revision 1.6 by dl, Thu Sep 25 11:02:41 2003 UTC vs.
Revision 1.83 by jsr166, Wed Jan 4 06:09:58 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.*;
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		}
39		public static Test suite() {
40	<	return new TestSuite(ScheduledExecutorTest.class);
18	<	}
19	<
20	<	static class MyRunnable implements Runnable {
21	<	volatile boolean done = false;
22	<	public void run() {
23	<	try {
24	<	Thread.sleep(SMALL_DELAY_MS);
25	<	done = true;
26	<	} catch(Exception e){
27	<	}
28	<	}
29	<	}
30	<
31	<	static class MyCallable implements Callable {
32	<	volatile boolean done = false;
33	<	public Object call() {
34	<	try {
35	<	Thread.sleep(SMALL_DELAY_MS);
36	<	done = true;
37	<	} catch(Exception e){
38	<	}
39	<	return Boolean.TRUE;
40	<	}
40	>	return new TestSuite(ScheduledExecutorTest.class);
41		}
42
43		/**
44		* execute successfully executes a runnable
45		*/
46	<	public void testExecute() {
47	<	try {
48	<	MyRunnable runnable =new MyRunnable();
49	<	ScheduledExecutor p1 = new ScheduledExecutor(1);
50	<	p1.execute(runnable);
51	<	assertFalse(runnable.done);
52	<	Thread.sleep(SHORT_DELAY_MS);
53	<	p1.shutdown();
54	<	try {
55	<	Thread.sleep(MEDIUM_DELAY_MS);
56	<	} catch(InterruptedException e){
57	<	unexpectedException();
58	<	}
59	<	assertTrue(runnable.done);
60	<	p1.shutdown();
61	<	joinPool(p1);
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	>	assertTrue(done.await(LONG_DELAY_MS, MILLISECONDS));
54		}
63	–	catch(Exception e){
64	–	unexpectedException();
65	–	}
66	–
55		}
56
69	–
57		/**
58		* delayed schedule of callable successfully executes after delay
59		*/
60	<	public void testSchedule1() {
61	<	try {
62	<	MyCallable callable = new MyCallable();
63	<	ScheduledExecutor p1 = new ScheduledExecutor(1);
64	<	Future f = p1.schedule(callable, SHORT_DELAY_MS, TimeUnit.MILLISECONDS);
65	<	assertFalse(callable.done);
66	<	Thread.sleep(MEDIUM_DELAY_MS);
67	<	assertTrue(callable.done);
68	<	assertEquals(Boolean.TRUE, f.get());
69	<	p1.shutdown();
70	<	joinPool(p1);
71	<	} catch(RejectedExecutionException e){}
72	<	catch(Exception e){
73	<	unexpectedException();
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() {
82	<	try {
83	<	MyRunnable runnable = new MyRunnable();
84	<	ScheduledExecutor p1 = new ScheduledExecutor(1);
85	<	p1.schedule(runnable, SMALL_DELAY_MS, TimeUnit.MILLISECONDS);
86	<	Thread.sleep(SHORT_DELAY_MS);
87	<	assertFalse(runnable.done);
88	<	Thread.sleep(MEDIUM_DELAY_MS);
89	<	assertTrue(runnable.done);
90	<	p1.shutdown();
91	<	joinPool(p1);
92	<	} catch(Exception e){
93	<	unexpectedException();
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	<
97	>
98		/**
99		* scheduleAtFixedRate executes runnable after given initial delay
100		*/
101	<	public void testSchedule4() {
102	<	try {
103	<	MyRunnable runnable = new MyRunnable();
104	<	ScheduledExecutor p1 = new ScheduledExecutor(1);
105	<	ScheduledCancellable h = p1.scheduleAtFixedRate(runnable, SHORT_DELAY_MS, SHORT_DELAY_MS, TimeUnit.MILLISECONDS);
106	<	assertFalse(runnable.done);
107	<	Thread.sleep(MEDIUM_DELAY_MS);
108	<	assertTrue(runnable.done);
109	<	h.cancel(true);
110	<	p1.shutdown();
111	<	joinPool(p1);
112	<	} catch(Exception e){
113	<	unexpectedException();
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() {
124	<	try {
125	<	MyRunnable runnable = new MyRunnable();
126	<	ScheduledExecutor p1 = new ScheduledExecutor(1);
127	<	ScheduledCancellable h = p1.scheduleWithFixedDelay(runnable, SHORT_DELAY_MS, SHORT_DELAY_MS, TimeUnit.MILLISECONDS);
128	<	assertFalse(runnable.done);
129	<	Thread.sleep(MEDIUM_DELAY_MS);
130	<	assertTrue(runnable.done);
131	<	h.cancel(true);
132	<	p1.shutdown();
133	<	joinPool(p1);
134	<	} catch(Exception e){
135	<	unexpectedException();
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	<
141	>
142	>	static class RunnableCounter implements Runnable {
143	>	AtomicInteger count = new AtomicInteger(0);
144	>	public void run() { count.getAndIncrement(); }
145	>	}
146	>
147	>	/**
148	>	* scheduleAtFixedRate executes series of tasks at given rate.
149	>	* Eventually, it must hold that:
150	>	*   cycles - 1 <= elapsedMillis/delay < cycles
151	>	*/
152	>	public void testFixedRateSequence() throws InterruptedException {
153	>	final ScheduledThreadPoolExecutor p = new ScheduledThreadPoolExecutor(1);
154	>	try (PoolCleaner cleaner = cleaner(p)) {
155	>	for (int delay = 1; delay <= LONG_DELAY_MS; delay *= 3) {
156	>	final long startTime = System.nanoTime();
157	>	final int cycles = 8;
158	>	final CountDownLatch done = new CountDownLatch(cycles);
159	>	final Runnable task = new CheckedRunnable() {
160	>	public void realRun() { done.countDown(); }};
161	>	final ScheduledFuture periodicTask =
162	>	p.scheduleAtFixedRate(task, 0, delay, MILLISECONDS);
163	>	final int totalDelayMillis = (cycles - 1) * delay;
164	>	await(done, totalDelayMillis + LONG_DELAY_MS);
165	>	periodicTask.cancel(true);
166	>	final long elapsedMillis = millisElapsedSince(startTime);
167	>	assertTrue(elapsedMillis >= totalDelayMillis);
168	>	if (elapsedMillis <= cycles * delay)
169	>	return;
170	>	// else retry with longer delay
171	>	}
172	>	fail("unexpected execution rate");
173	>	}
174	>	}
175	>
176	>	/**
177	>	* scheduleWithFixedDelay executes series of tasks with given period.
178	>	* Eventually, it must hold that each task starts at least delay and at
179	>	* most 2 * delay after the termination of the previous task.
180	>	*/
181	>	public void testFixedDelaySequence() throws InterruptedException {
182	>	final ScheduledThreadPoolExecutor p = new ScheduledThreadPoolExecutor(1);
183	>	try (PoolCleaner cleaner = cleaner(p)) {
184	>	for (int delay = 1; delay <= LONG_DELAY_MS; delay *= 3) {
185	>	final long startTime = System.nanoTime();
186	>	final AtomicLong previous = new AtomicLong(startTime);
187	>	final AtomicBoolean tryLongerDelay = new AtomicBoolean(false);
188	>	final int cycles = 8;
189	>	final CountDownLatch done = new CountDownLatch(cycles);
190	>	final int d = delay;
191	>	final Runnable task = new CheckedRunnable() {
192	>	public void realRun() {
193	>	long now = System.nanoTime();
194	>	long elapsedMillis
195	>	= NANOSECONDS.toMillis(now - previous.get());
196	>	if (done.getCount() == cycles) { // first execution
197	>	if (elapsedMillis >= d)
198	>	tryLongerDelay.set(true);
199	>	} else {
200	>	assertTrue(elapsedMillis >= d);
201	>	if (elapsedMillis >= 2 * d)
202	>	tryLongerDelay.set(true);
203	>	}
204	>	previous.set(now);
205	>	done.countDown();
206	>	}};
207	>	final ScheduledFuture periodicTask =
208	>	p.scheduleWithFixedDelay(task, 0, delay, MILLISECONDS);
209	>	final int totalDelayMillis = (cycles - 1) * delay;
210	>	await(done, totalDelayMillis + cycles * LONG_DELAY_MS);
211	>	periodicTask.cancel(true);
212	>	final long elapsedMillis = millisElapsedSince(startTime);
213	>	assertTrue(elapsedMillis >= totalDelayMillis);
214	>	if (!tryLongerDelay.get())
215	>	return;
216	>	// else retry with longer delay
217	>	}
218	>	fail("unexpected execution rate");
219	>	}
220	>	}
221	>
222		/**
223	<	*  execute (null) throws NPE
223	>	* execute(null) throws NPE
224		*/
225	<	public void testExecuteNull() {
226	<	ScheduledExecutor se = null;
227	<	try {
228	<	se = new ScheduledExecutor(1);
229	<	se.execute(null);
230	<	shouldThrow();
231	<	} catch(NullPointerException success){}
157	<	catch(Exception e){
158	<	unexpectedException();
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		}
160	–
161	–	joinPool(se);
233		}
234
235		/**
236	<	* schedule (null) throws NPE
236	>	* schedule(null) throws NPE
237		*/
238	<	public void testScheduleNull() {
239	<	ScheduledExecutor se = new ScheduledExecutor(1);
240	<	try {
241	<	MyCallable callable = null;
242	<	Future f = se.schedule(callable, SHORT_DELAY_MS, TimeUnit.MILLISECONDS);
243	<	shouldThrow();
244	<	} catch(NullPointerException success){}
245	<	catch(Exception e){
175	<	unexpectedException();
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		}
177	–	joinPool(se);
247		}
248	<
248	>
249		/**
250		* execute throws RejectedExecutionException if shutdown
251		*/
252	<	public void testSchedule1_RejectedExecutionException() {
253	<	ScheduledExecutor se = new ScheduledExecutor(1);
254	<	try {
255	<	se.shutdown();
256	<	se.schedule(new NoOpRunnable(),
257	<	MEDIUM_DELAY_MS, TimeUnit.MILLISECONDS);
258	<	shouldThrow();
259	<	} catch(RejectedExecutionException success){
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		}
192	–	joinPool(se);
193	–
263		}
264
265		/**
266		* schedule throws RejectedExecutionException if shutdown
267		*/
268	<	public void testSchedule2_RejectedExecutionException() {
269	<	ScheduledExecutor se = new ScheduledExecutor(1);
270	<	try {
271	<	se.shutdown();
272	<	se.schedule(new NoOpCallable(),
273	<	MEDIUM_DELAY_MS, TimeUnit.MILLISECONDS);
274	<	shouldThrow();
275	<	} catch(RejectedExecutionException success){
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		}
208	–	joinPool(se);
279		}
280
281		/**
282		* schedule callable throws RejectedExecutionException if shutdown
283		*/
284	<	public void testSchedule3_RejectedExecutionException() {
285	<	ScheduledExecutor se = new ScheduledExecutor(1);
286	<	try {
287	<	se.shutdown();
288	<	se.schedule(new NoOpCallable(),
289	<	MEDIUM_DELAY_MS, TimeUnit.MILLISECONDS);
290	<	shouldThrow();
291	<	} catch(RejectedExecutionException success){
292	<	}
293	<	joinPool(se);
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
298	>	* scheduleAtFixedRate throws RejectedExecutionException if shutdown
299		*/
300	<	public void testScheduleAtFixedRate1_RejectedExecutionException() {
301	<	ScheduledExecutor se = new ScheduledExecutor(1);
302	<	try {
303	<	se.shutdown();
304	<	se.scheduleAtFixedRate(new NoOpRunnable(),
305	<	MEDIUM_DELAY_MS, MEDIUM_DELAY_MS, TimeUnit.MILLISECONDS);
306	<	shouldThrow();
307	<	} catch(RejectedExecutionException success){
308	<	}
309	<	joinPool(se);
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	<
312	>
313		/**
314		* scheduleWithFixedDelay throws RejectedExecutionException if shutdown
315		*/
316	<	public void testScheduleWithFixedDelay1_RejectedExecutionException() {
317	<	ScheduledExecutor se = new ScheduledExecutor(1);
318	<	try {
319	<	se.shutdown();
320	<	se.scheduleWithFixedDelay(new NoOpRunnable(),
321	<	MEDIUM_DELAY_MS, MEDIUM_DELAY_MS, TimeUnit.MILLISECONDS);
322	<	shouldThrow();
323	<	} catch(RejectedExecutionException success){
324	<	}
325	<	joinPool(se);
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() {
334	<	ScheduledExecutor p2 = new ScheduledExecutor(2);
335	<	assertEquals(0, p2.getActiveCount());
336	<	p2.execute(new SmallRunnable());
337	<	try {
338	<	Thread.sleep(SHORT_DELAY_MS);
339	<	} catch(Exception e){
340	<	unexpectedException();
341	<	}
342	<	assertEquals(1, p2.getActiveCount());
343	<	joinPool(p2);
344	<	}
345	<
346	<	/**
347	<	*    getCompletedTaskCount increases, but doesn't overestimate,
348	<	*   when tasks complete
349	<	*/
350	<	public void testGetCompletedTaskCount() {
351	<	ScheduledExecutor p2 = new ScheduledExecutor(2);
352	<	assertEquals(0, p2.getCompletedTaskCount());
353	<	p2.execute(new SmallRunnable());
354	<	try {
355	<	Thread.sleep(MEDIUM_DELAY_MS);
356	<	} catch(Exception e){
357	<	unexpectedException();
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	>	threadProceed.await();
366	>	threadDone.countDown();
367	>	}});
368	>	await(threadStarted);
369	>	assertEquals(0, p.getCompletedTaskCount());
370	>	threadProceed.countDown();
371	>	threadDone.await();
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, p2.getCompletedTaskCount());
469	<	joinPool(p2);
468	>	assertEquals(1 + TASKS, p.getTaskCount());
469	>	assertEquals(1 + TASKS, p.getCompletedTaskCount());
470		}
471	<
471	>
472		/**
473	<	*  getCorePoolSize returns size given in constructor if not otherwise set
473	>	* getThreadFactory returns factory in constructor if not set
474		*/
475	<	public void testGetCorePoolSize() {
476	<	ScheduledExecutor p1 = new ScheduledExecutor(1);
477	<	assertEquals(1, p1.getCorePoolSize());
478	<	joinPool(p1);
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	<
483	>
484		/**
485	<	*    getLargestPoolSize increases, but doesn't overestimate, when
301	<	*   multiple threads active
485	>	* setThreadFactory sets the thread factory returned by getThreadFactory
486		*/
487	<	public void testGetLargestPoolSize() {
488	<	ScheduledExecutor p2 = new ScheduledExecutor(2);
489	<	assertEquals(0, p2.getLargestPoolSize());
490	<	p2.execute(new SmallRunnable());
491	<	p2.execute(new SmallRunnable());
492	<	try {
309	<	Thread.sleep(SHORT_DELAY_MS);
310	<	} catch(Exception e){
311	<	unexpectedException();
312	<	}
313	<	assertEquals(2, p2.getLargestPoolSize());
314	<	joinPool(p2);
315	<	}
316	<
317	<	/**
318	<	*   getPoolSize increases, but doesn't overestimate, when threads
319	<	*   become active
320	<	*/
321	<	public void testGetPoolSize() {
322	<	ScheduledExecutor p1 = new ScheduledExecutor(1);
323	<	assertEquals(0, p1.getPoolSize());
324	<	p1.execute(new SmallRunnable());
325	<	assertEquals(1, p1.getPoolSize());
326	<	joinPool(p1);
327	<	}
328	<
329	<	/**
330	<	*    getTaskCount increases, but doesn't overestimate, when tasks
331	<	*    submitted
332	<	*/
333	<	public void testGetTaskCount() {
334	<	ScheduledExecutor p1 = new ScheduledExecutor(1);
335	<	assertEquals(0, p1.getTaskCount());
336	<	for(int i = 0; i < 5; i++)
337	<	p1.execute(new SmallRunnable());
338	<	try {
339	<	Thread.sleep(SHORT_DELAY_MS);
340	<	} catch(Exception e){
341	<	unexpectedException();
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		}
343	–	assertEquals(5, p1.getTaskCount());
344	–	joinPool(p1);
494		}
495	<
495	>
496		/**
497	<	*   is isShutDown is false before shutdown, true after
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	>	* isShutdown is false before shutdown, true after
511		*/
512		public void testIsShutdown() {
513	<
514	<	ScheduledExecutor p1 = new ScheduledExecutor(1);
513	>	final ScheduledThreadPoolExecutor p = new ScheduledThreadPoolExecutor(1);
514	>	assertFalse(p.isShutdown());
515	>	try (PoolCleaner cleaner = cleaner(p)) {
516	>	try {
517	>	p.shutdown();
518	>	assertTrue(p.isShutdown());
519	>	} catch (SecurityException ok) {}
520	>	}
521	>	}
522	>
523	>	/**
524	>	* isTerminated is false before termination, true after
525	>	*/
526	>	public void testIsTerminated() throws InterruptedException {
527	>	final ThreadPoolExecutor p = new ScheduledThreadPoolExecutor(1);
528	>	try (PoolCleaner cleaner = cleaner(p)) {
529	>	final CountDownLatch threadStarted = new CountDownLatch(1);
530	>	final CountDownLatch done = new CountDownLatch(1);
531	>	assertFalse(p.isTerminated());
532	>	p.execute(new CheckedRunnable() {
533	>	public void realRun() throws InterruptedException {
534	>	assertFalse(p.isTerminated());
535	>	threadStarted.countDown();
536	>	await(done);
537	>	}});
538	>	await(threadStarted);
539	>	assertFalse(p.isTerminating());
540	>	done.countDown();
541	>	try { p.shutdown(); } catch (SecurityException ok) { return; }
542	>	assertTrue(p.awaitTermination(LONG_DELAY_MS, MILLISECONDS));
543	>	assertTrue(p.isTerminated());
544	>	}
545	>	}
546	>
547	>	/**
548	>	* isTerminating is not true when running or when terminated
549	>	*/
550	>	public void testIsTerminating() throws InterruptedException {
551	>	final ThreadPoolExecutor p = new ScheduledThreadPoolExecutor(1);
552	>	final CountDownLatch threadStarted = new CountDownLatch(1);
553	>	final CountDownLatch done = new CountDownLatch(1);
554	>	try (PoolCleaner cleaner = cleaner(p)) {
555	>	assertFalse(p.isTerminating());
556	>	p.execute(new CheckedRunnable() {
557	>	public void realRun() throws InterruptedException {
558	>	assertFalse(p.isTerminating());
559	>	threadStarted.countDown();
560	>	await(done);
561	>	}});
562	>	await(threadStarted);
563	>	assertFalse(p.isTerminating());
564	>	done.countDown();
565	>	try { p.shutdown(); } catch (SecurityException ok) { return; }
566	>	assertTrue(p.awaitTermination(LONG_DELAY_MS, MILLISECONDS));
567	>	assertTrue(p.isTerminated());
568	>	assertFalse(p.isTerminating());
569	>	}
570	>	}
571	>
572	>	/**
573	>	* getQueue returns the work queue, which contains queued tasks
574	>	*/
575	>	public void testGetQueue() throws InterruptedException {
576	>	final CountDownLatch done = new CountDownLatch(1);
577	>	final ScheduledThreadPoolExecutor p = new ScheduledThreadPoolExecutor(1);
578	>	try (PoolCleaner cleaner = cleaner(p, done)) {
579	>	final CountDownLatch threadStarted = new CountDownLatch(1);
580	>	ScheduledFuture[] tasks = new ScheduledFuture[5];
581	>	for (int i = 0; i < tasks.length; i++) {
582	>	Runnable r = new CheckedRunnable() {
583	>	public void realRun() throws InterruptedException {
584	>	threadStarted.countDown();
585	>	await(done);
586	>	}};
587	>	tasks[i] = p.schedule(r, 1, MILLISECONDS);
588	>	}
589	>	await(threadStarted);
590	>	BlockingQueue<Runnable> q = p.getQueue();
591	>	assertTrue(q.contains(tasks[tasks.length - 1]));
592	>	assertFalse(q.contains(tasks[0]));
593	>	}
594	>	}
595	>
596	>	/**
597	>	* remove(task) removes queued task, and fails to remove active task
598	>	*/
599	>	public void testRemove() throws InterruptedException {
600	>	final CountDownLatch done = new CountDownLatch(1);
601	>	final ScheduledThreadPoolExecutor p = new ScheduledThreadPoolExecutor(1);
602	>	try (PoolCleaner cleaner = cleaner(p, done)) {
603	>	ScheduledFuture[] tasks = new ScheduledFuture[5];
604	>	final CountDownLatch threadStarted = new CountDownLatch(1);
605	>	for (int i = 0; i < tasks.length; i++) {
606	>	Runnable r = new CheckedRunnable() {
607	>	public void realRun() throws InterruptedException {
608	>	threadStarted.countDown();
609	>	await(done);
610	>	}};
611	>	tasks[i] = p.schedule(r, 1, MILLISECONDS);
612	>	}
613	>	await(threadStarted);
614	>	BlockingQueue<Runnable> q = p.getQueue();
615	>	assertFalse(p.remove((Runnable)tasks[0]));
616	>	assertTrue(q.contains((Runnable)tasks[4]));
617	>	assertTrue(q.contains((Runnable)tasks[3]));
618	>	assertTrue(p.remove((Runnable)tasks[4]));
619	>	assertFalse(p.remove((Runnable)tasks[4]));
620	>	assertFalse(q.contains((Runnable)tasks[4]));
621	>	assertTrue(q.contains((Runnable)tasks[3]));
622	>	assertTrue(p.remove((Runnable)tasks[3]));
623	>	assertFalse(q.contains((Runnable)tasks[3]));
624	>	}
625	>	}
626	>
627	>	/**
628	>	* purge eventually removes cancelled tasks from the queue
629	>	*/
630	>	public void testPurge() throws InterruptedException {
631	>	final ScheduledFuture[] tasks = new ScheduledFuture[5];
632	>	final Runnable releaser = new Runnable() { public void run() {
633	>	for (ScheduledFuture task : tasks)
634	>	if (task != null) task.cancel(true); }};
635	>	final ScheduledThreadPoolExecutor p = new ScheduledThreadPoolExecutor(1);
636	>	try (PoolCleaner cleaner = cleaner(p, releaser)) {
637	>	for (int i = 0; i < tasks.length; i++)
638	>	tasks[i] = p.schedule(new SmallPossiblyInterruptedRunnable(),
639	>	LONG_DELAY_MS, MILLISECONDS);
640	>	int max = tasks.length;
641	>	if (tasks[4].cancel(true)) --max;
642	>	if (tasks[3].cancel(true)) --max;
643	>	// There must eventually be an interference-free point at
644	>	// which purge will not fail. (At worst, when queue is empty.)
645	>	long startTime = System.nanoTime();
646	>	do {
647	>	p.purge();
648	>	long count = p.getTaskCount();
649	>	if (count == max)
650	>	return;
651	>	} while (millisElapsedSince(startTime) < LONG_DELAY_MS);
652	>	fail("Purge failed to remove cancelled tasks");
653	>	}
654	>	}
655	>
656	>	/**
657	>	* shutdownNow returns a list containing tasks that were not run,
658	>	* and those tasks are drained from the queue
659	>	*/
660	>	public void testShutdownNow() throws InterruptedException {
661	>	final int poolSize = 2;
662	>	final int count = 5;
663	>	final AtomicInteger ran = new AtomicInteger(0);
664	>	final ScheduledThreadPoolExecutor p =
665	>	new ScheduledThreadPoolExecutor(poolSize);
666	>	final CountDownLatch threadsStarted = new CountDownLatch(poolSize);
667	>	Runnable waiter = new CheckedRunnable() { public void realRun() {
668	>	threadsStarted.countDown();
669	>	try {
670	>	MILLISECONDS.sleep(2 * LONG_DELAY_MS);
671	>	} catch (InterruptedException success) {}
672	>	ran.getAndIncrement();
673	>	}};
674	>	for (int i = 0; i < count; i++)
675	>	p.execute(waiter);
676	>	await(threadsStarted);
677	>	assertEquals(poolSize, p.getActiveCount());
678	>	assertEquals(0, p.getCompletedTaskCount());
679	>	final List<Runnable> queuedTasks;
680		try {
681	<	assertFalse(p1.isShutdown());
681	>	queuedTasks = p.shutdownNow();
682	>	} catch (SecurityException ok) {
683	>	return; // Allowed in case test doesn't have privs
684	>	}
685	>	assertTrue(p.isShutdown());
686	>	assertTrue(p.getQueue().isEmpty());
687	>	assertEquals(count - poolSize, queuedTasks.size());
688	>	assertTrue(p.awaitTermination(LONG_DELAY_MS, MILLISECONDS));
689	>	assertTrue(p.isTerminated());
690	>	assertEquals(poolSize, ran.get());
691	>	assertEquals(poolSize, p.getCompletedTaskCount());
692	>	}
693	>
694	>	/**
695	>	* shutdownNow returns a list containing tasks that were not run,
696	>	* and those tasks are drained from the queue
697	>	*/
698	>	public void testShutdownNow_delayedTasks() throws InterruptedException {
699	>	final ScheduledThreadPoolExecutor p = new ScheduledThreadPoolExecutor(1);
700	>	List<ScheduledFuture> tasks = new ArrayList<>();
701	>	for (int i = 0; i < 3; i++) {
702	>	Runnable r = new NoOpRunnable();
703	>	tasks.add(p.schedule(r, 9, SECONDS));
704	>	tasks.add(p.scheduleAtFixedRate(r, 9, 9, SECONDS));
705	>	tasks.add(p.scheduleWithFixedDelay(r, 9, 9, SECONDS));
706	>	}
707	>	if (testImplementationDetails)
708	>	assertEquals(new HashSet(tasks), new HashSet(p.getQueue()));
709	>	final List<Runnable> queuedTasks;
710	>	try {
711	>	queuedTasks = p.shutdownNow();
712	>	} catch (SecurityException ok) {
713	>	return; // Allowed in case test doesn't have privs
714	>	}
715	>	assertTrue(p.isShutdown());
716	>	assertTrue(p.getQueue().isEmpty());
717	>	if (testImplementationDetails)
718	>	assertEquals(new HashSet(tasks), new HashSet(queuedTasks));
719	>	assertEquals(tasks.size(), queuedTasks.size());
720	>	for (ScheduledFuture task : tasks) {
721	>	assertFalse(task.isDone());
722	>	assertFalse(task.isCancelled());
723	>	}
724	>	assertTrue(p.awaitTermination(LONG_DELAY_MS, MILLISECONDS));
725	>	assertTrue(p.isTerminated());
726	>	}
727	>
728	>	/**
729	>	* By default, periodic tasks are cancelled at shutdown.
730	>	* By default, delayed tasks keep running after shutdown.
731	>	* Check that changing the default values work:
732	>	* - setExecuteExistingDelayedTasksAfterShutdownPolicy
733	>	* - setContinueExistingPeriodicTasksAfterShutdownPolicy
734	>	*/
735	>	public void testShutdown_cancellation() throws Exception {
736	>	Boolean[] allBooleans = { null, Boolean.FALSE, Boolean.TRUE };
737	>	for (Boolean policy : allBooleans)
738	>	{
739	>	final int poolSize = 2;
740	>	final ScheduledThreadPoolExecutor p
741	>	= new ScheduledThreadPoolExecutor(poolSize);
742	>	final boolean effectiveDelayedPolicy = (policy != Boolean.FALSE);
743	>	final boolean effectivePeriodicPolicy = (policy == Boolean.TRUE);
744	>	final boolean effectiveRemovePolicy = (policy == Boolean.TRUE);
745	>	if (policy != null) {
746	>	p.setExecuteExistingDelayedTasksAfterShutdownPolicy(policy);
747	>	p.setContinueExistingPeriodicTasksAfterShutdownPolicy(policy);
748	>	p.setRemoveOnCancelPolicy(policy);
749	>	}
750	>	assertEquals(effectiveDelayedPolicy,
751	>	p.getExecuteExistingDelayedTasksAfterShutdownPolicy());
752	>	assertEquals(effectivePeriodicPolicy,
753	>	p.getContinueExistingPeriodicTasksAfterShutdownPolicy());
754	>	assertEquals(effectiveRemovePolicy,
755	>	p.getRemoveOnCancelPolicy());
756	>	// Strategy: Wedge the pool with poolSize "blocker" threads
757	>	final AtomicInteger ran = new AtomicInteger(0);
758	>	final CountDownLatch poolBlocked = new CountDownLatch(poolSize);
759	>	final CountDownLatch unblock = new CountDownLatch(1);
760	>	final CountDownLatch periodicLatch1 = new CountDownLatch(2);
761	>	final CountDownLatch periodicLatch2 = new CountDownLatch(2);
762	>	Runnable task = new CheckedRunnable() { public void realRun()
763	>	throws InterruptedException {
764	>	poolBlocked.countDown();
765	>	assertTrue(unblock.await(LONG_DELAY_MS, MILLISECONDS));
766	>	ran.getAndIncrement();
767	>	}};
768	>	List<Future<?>> blockers = new ArrayList<>();
769	>	List<Future<?>> periodics = new ArrayList<>();
770	>	List<Future<?>> delayeds = new ArrayList<>();
771	>	for (int i = 0; i < poolSize; i++)
772	>	blockers.add(p.submit(task));
773	>	assertTrue(poolBlocked.await(LONG_DELAY_MS, MILLISECONDS));
774	>
775	>	periodics.add(p.scheduleAtFixedRate(countDowner(periodicLatch1),
776	>	1, 1, MILLISECONDS));
777	>	periodics.add(p.scheduleWithFixedDelay(countDowner(periodicLatch2),
778	>	1, 1, MILLISECONDS));
779	>	delayeds.add(p.schedule(task, 1, MILLISECONDS));
780	>
781	>	assertTrue(p.getQueue().containsAll(periodics));
782	>	assertTrue(p.getQueue().containsAll(delayeds));
783	>	try { p.shutdown(); } catch (SecurityException ok) { return; }
784	>	assertTrue(p.isShutdown());
785	>	assertFalse(p.isTerminated());
786	>	for (Future<?> periodic : periodics) {
787	>	assertTrue(effectivePeriodicPolicy ^ periodic.isCancelled());
788	>	assertTrue(effectivePeriodicPolicy ^ periodic.isDone());
789	>	}
790	>	for (Future<?> delayed : delayeds) {
791	>	assertTrue(effectiveDelayedPolicy ^ delayed.isCancelled());
792	>	assertTrue(effectiveDelayedPolicy ^ delayed.isDone());
793	>	}
794	>	if (testImplementationDetails) {
795	>	assertEquals(effectivePeriodicPolicy,
796	>	p.getQueue().containsAll(periodics));
797	>	assertEquals(effectiveDelayedPolicy,
798	>	p.getQueue().containsAll(delayeds));
799	>	}
800	>	// Release all pool threads
801	>	unblock.countDown();
802	>
803	>	for (Future<?> delayed : delayeds) {
804	>	if (effectiveDelayedPolicy) {
805	>	assertNull(delayed.get());
806	>	}
807		}
808	<	finally {
809	<	p1.shutdown();
808	>	if (effectivePeriodicPolicy) {
809	>	assertTrue(periodicLatch1.await(LONG_DELAY_MS, MILLISECONDS));
810	>	assertTrue(periodicLatch2.await(LONG_DELAY_MS, MILLISECONDS));
811	>	for (Future<?> periodic : periodics) {
812	>	assertTrue(periodic.cancel(false));
813	>	assertTrue(periodic.isCancelled());
814	>	assertTrue(periodic.isDone());
815	>	}
816	>	}
817	>	assertTrue(p.awaitTermination(LONG_DELAY_MS, MILLISECONDS));
818	>	assertTrue(p.isTerminated());
819	>	assertEquals(2 + (effectiveDelayedPolicy ? 1 : 0), ran.get());
820	>	}}
821	>
822	>	/**
823	>	* completed submit of callable returns result
824	>	*/
825	>	public void testSubmitCallable() throws Exception {
826	>	final ExecutorService e = new ScheduledThreadPoolExecutor(2);
827	>	try (PoolCleaner cleaner = cleaner(e)) {
828	>	Future<String> future = e.submit(new StringTask());
829	>	String result = future.get();
830	>	assertSame(TEST_STRING, result);
831		}
359	–	assertTrue(p1.isShutdown());
832		}
833
362	–
834		/**
835	<	*   isTerminated is false before termination, true after
835	>	* completed submit of runnable returns successfully
836		*/
837	<	public void testIsTerminated() {
838	<	ScheduledExecutor p1 = new ScheduledExecutor(1);
839	<	try {
840	<	p1.execute(new SmallRunnable());
841	<	} finally {
842	<	p1.shutdown();
837	>	public void testSubmitRunnable() throws Exception {
838	>	final ExecutorService e = new ScheduledThreadPoolExecutor(2);
839	>	try (PoolCleaner cleaner = cleaner(e)) {
840	>	Future<?> future = e.submit(new NoOpRunnable());
841	>	future.get();
842	>	assertTrue(future.isDone());
843		}
373	–	try {
374	–	assertTrue(p1.awaitTermination(LONG_DELAY_MS, TimeUnit.MILLISECONDS));
375	–	assertTrue(p1.isTerminated());
376	–	} catch(Exception e){
377	–	unexpectedException();
378	–	}
844		}
845
846		/**
847	<	*  isTerminating is not true when running or when terminated
847	>	* completed submit of (runnable, result) returns result
848		*/
849	<	public void testIsTerminating() {
850	<	ScheduledExecutor p1 = new ScheduledExecutor(1);
851	<	assertFalse(p1.isTerminating());
852	<	try {
853	<	p1.execute(new SmallRunnable());
854	<	assertFalse(p1.isTerminating());
390	<	} finally {
391	<	p1.shutdown();
849	>	public void testSubmitRunnable2() throws Exception {
850	>	final ExecutorService e = new ScheduledThreadPoolExecutor(2);
851	>	try (PoolCleaner cleaner = cleaner(e)) {
852	>	Future<String> future = e.submit(new NoOpRunnable(), TEST_STRING);
853	>	String result = future.get();
854	>	assertSame(TEST_STRING, result);
855		}
393	–	try {
394	–	assertTrue(p1.awaitTermination(LONG_DELAY_MS, TimeUnit.MILLISECONDS));
395	–	assertTrue(p1.isTerminated());
396	–	assertFalse(p1.isTerminating());
397	–	} catch(Exception e){
398	–	unexpectedException();
399	–	}
856		}
857
858		/**
859	<	*   purge removes cancelled tasks from the queue
859	>	* invokeAny(null) throws NPE
860		*/
861	<	public void testPurge() {
862	<	ScheduledExecutor p1 = new ScheduledExecutor(1);
863	<	ScheduledCancellable[] tasks = new ScheduledCancellable[5];
864	<	for(int i = 0; i < 5; i++){
865	<	tasks[i] = p1.schedule(new SmallRunnable(), 1, TimeUnit.MILLISECONDS);
861	>	public void testInvokeAny1() throws Exception {
862	>	final ExecutorService e = new ScheduledThreadPoolExecutor(2);
863	>	try (PoolCleaner cleaner = cleaner(e)) {
864	>	try {
865	>	e.invokeAny(null);
866	>	shouldThrow();
867	>	} catch (NullPointerException success) {}
868		}
411	–	int max = 5;
412	–	if (tasks[4].cancel(true)) --max;
413	–	if (tasks[3].cancel(true)) --max;
414	–	p1.purge();
415	–	long count = p1.getTaskCount();
416	–	assertTrue(count > 0 && count <= max);
417	–	joinPool(p1);
869		}
870
871		/**
872	<	*  shutDownNow returns a list containing tasks that were not run
872	>	* invokeAny(empty collection) throws IAE
873		*/
874	<	public void testShutDownNow() {
875	<	ScheduledExecutor p1 = new ScheduledExecutor(1);
876	<	for(int i = 0; i < 5; i++)
877	<	p1.schedule(new SmallRunnable(), SHORT_DELAY_MS, TimeUnit.MILLISECONDS);
878	<	List l = p1.shutdownNow();
879	<	assertTrue(p1.isShutdown());
880	<	assertTrue(l.size() > 0 && l.size() <= 5);
881	<	joinPool(p1);
874	>	public void testInvokeAny2() throws Exception {
875	>	final ExecutorService e = new ScheduledThreadPoolExecutor(2);
876	>	try (PoolCleaner cleaner = cleaner(e)) {
877	>	try {
878	>	e.invokeAny(new ArrayList<Callable<String>>());
879	>	shouldThrow();
880	>	} catch (IllegalArgumentException success) {}
881	>	}
882		}
883
884		/**
885	<	* In default setting, shutdown cancels periodic but not delayed
435	<	* tasks at shutdown
885	>	* invokeAny(c) throws NPE if c has null elements
886		*/
887	<	public void testShutDown1() {
888	<	try {
889	<	ScheduledExecutor p1 = new ScheduledExecutor(1);
890	<	assertTrue(p1.getExecuteExistingDelayedTasksAfterShutdownPolicy());
891	<	assertFalse(p1.getContinueExistingPeriodicTasksAfterShutdownPolicy());
887	>	public void testInvokeAny3() throws Exception {
888	>	CountDownLatch latch = new CountDownLatch(1);
889	>	final ExecutorService e = new ScheduledThreadPoolExecutor(2);
890	>	try (PoolCleaner cleaner = cleaner(e)) {
891	>	List<Callable<String>> l = new ArrayList<>();
892	>	l.add(latchAwaitingStringTask(latch));
893	>	l.add(null);
894	>	try {
895	>	e.invokeAny(l);
896	>	shouldThrow();
897	>	} catch (NullPointerException success) {}
898	>	latch.countDown();
899	>	}
900	>	}
901
902	<	ScheduledCancellable[] tasks = new ScheduledCancellable[5];
903	<	for(int i = 0; i < 5; i++)
904	<	tasks[i] = p1.schedule(new NoOpRunnable(), SHORT_DELAY_MS, TimeUnit.MILLISECONDS);
905	<	p1.shutdown();
906	<	BlockingQueue q = p1.getQueue();
907	<	for (Iterator it = q.iterator(); it.hasNext();) {
908	<	ScheduledCancellable t = (ScheduledCancellable)it.next();
909	<	assertFalse(t.isCancelled());
902	>	/**
903	>	* invokeAny(c) throws ExecutionException if no task completes
904	>	*/
905	>	public void testInvokeAny4() throws Exception {
906	>	final ExecutorService e = new ScheduledThreadPoolExecutor(2);
907	>	try (PoolCleaner cleaner = cleaner(e)) {
908	>	List<Callable<String>> l = new ArrayList<>();
909	>	l.add(new NPETask());
910	>	try {
911	>	e.invokeAny(l);
912	>	shouldThrow();
913	>	} catch (ExecutionException success) {
914	>	assertTrue(success.getCause() instanceof NullPointerException);
915		}
916	<	assertTrue(p1.isShutdown());
917	<	Thread.sleep(SMALL_DELAY_MS);
918	<	for (int i = 0; i < 5; ++i) {
919	<	assertTrue(tasks[i].isDone());
920	<	assertFalse(tasks[i].isCancelled());
916	>	}
917	>	}
918	>
919	>	/**
920	>	* invokeAny(c) returns result of some task
921	>	*/
922	>	public void testInvokeAny5() 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 StringTask());
927	>	l.add(new StringTask());
928	>	String result = e.invokeAny(l);
929	>	assertSame(TEST_STRING, result);
930	>	}
931	>	}
932	>
933	>	/**
934	>	* invokeAll(null) throws NPE
935	>	*/
936	>	public void testInvokeAll1() throws Exception {
937	>	final ExecutorService e = new ScheduledThreadPoolExecutor(2);
938	>	try (PoolCleaner cleaner = cleaner(e)) {
939	>	try {
940	>	e.invokeAll(null);
941	>	shouldThrow();
942	>	} catch (NullPointerException success) {}
943	>	}
944	>	}
945	>
946	>	/**
947	>	* invokeAll(empty collection) returns empty collection
948	>	*/
949	>	public void testInvokeAll2() throws Exception {
950	>	final ExecutorService e = new ScheduledThreadPoolExecutor(2);
951	>	try (PoolCleaner cleaner = cleaner(e)) {
952	>	List<Future<String>> r = e.invokeAll(new ArrayList<Callable<String>>());
953	>	assertTrue(r.isEmpty());
954	>	}
955	>	}
956	>
957	>	/**
958	>	* invokeAll(c) throws NPE if c has null elements
959	>	*/
960	>	public void testInvokeAll3() throws Exception {
961	>	final ExecutorService e = new ScheduledThreadPoolExecutor(2);
962	>	try (PoolCleaner cleaner = cleaner(e)) {
963	>	List<Callable<String>> l = new ArrayList<>();
964	>	l.add(new StringTask());
965	>	l.add(null);
966	>	try {
967	>	e.invokeAll(l);
968	>	shouldThrow();
969	>	} catch (NullPointerException success) {}
970	>	}
971	>	}
972	>
973	>	/**
974	>	* get of invokeAll(c) throws exception on failed task
975	>	*/
976	>	public void testInvokeAll4() 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	>	List<Future<String>> futures = e.invokeAll(l);
982	>	assertEquals(1, futures.size());
983	>	try {
984	>	futures.get(0).get();
985	>	shouldThrow();
986	>	} catch (ExecutionException success) {
987	>	assertTrue(success.getCause() instanceof NullPointerException);
988		}
458	–
989		}
990	<	catch(Exception ex) {
991	<	unexpectedException();
990	>	}
991	>
992	>	/**
993	>	* invokeAll(c) returns results of all completed tasks
994	>	*/
995	>	public void testInvokeAll5() throws Exception {
996	>	final ExecutorService e = new ScheduledThreadPoolExecutor(2);
997	>	try (PoolCleaner cleaner = cleaner(e)) {
998	>	List<Callable<String>> l = new ArrayList<>();
999	>	l.add(new StringTask());
1000	>	l.add(new StringTask());
1001	>	List<Future<String>> futures = e.invokeAll(l);
1002	>	assertEquals(2, futures.size());
1003	>	for (Future<String> future : futures)
1004	>	assertSame(TEST_STRING, future.get());
1005	>	}
1006	>	}
1007	>
1008	>	/**
1009	>	* timed invokeAny(null) throws NPE
1010	>	*/
1011	>	public void testTimedInvokeAny1() throws Exception {
1012	>	final ExecutorService e = new ScheduledThreadPoolExecutor(2);
1013	>	try (PoolCleaner cleaner = cleaner(e)) {
1014	>	try {
1015	>	e.invokeAny(null, MEDIUM_DELAY_MS, MILLISECONDS);
1016	>	shouldThrow();
1017	>	} catch (NullPointerException success) {}
1018		}
1019		}
1020
1021	+	/**
1022	+	* timed invokeAny(,,null) throws NPE
1023	+	*/
1024	+	public void testTimedInvokeAnyNullTimeUnit() throws Exception {
1025	+	final ExecutorService e = new ScheduledThreadPoolExecutor(2);
1026	+	try (PoolCleaner cleaner = cleaner(e)) {
1027	+	List<Callable<String>> l = new ArrayList<>();
1028	+	l.add(new StringTask());
1029	+	try {
1030	+	e.invokeAny(l, MEDIUM_DELAY_MS, null);
1031	+	shouldThrow();
1032	+	} catch (NullPointerException success) {}
1033	+	}
1034	+	}
1035
1036		/**
1037	<	* If setExecuteExistingDelayedTasksAfterShutdownPolicy is false,
468	<	* delayed tasks are cancelled at shutdown
1037	>	* timed invokeAny(empty collection) throws IAE
1038		*/
1039	<	public void testShutDown2() {
1040	<	try {
1041	<	ScheduledExecutor p1 = new ScheduledExecutor(1);
1042	<	p1.setExecuteExistingDelayedTasksAfterShutdownPolicy(false);
1043	<	ScheduledCancellable[] tasks = new ScheduledCancellable[5];
1044	<	for(int i = 0; i < 5; i++)
1045	<	tasks[i] = p1.schedule(new NoOpRunnable(), SHORT_DELAY_MS, TimeUnit.MILLISECONDS);
477	<	p1.shutdown();
478	<	assertTrue(p1.isShutdown());
479	<	BlockingQueue q = p1.getQueue();
480	<	assertTrue(q.isEmpty());
481	<	Thread.sleep(SMALL_DELAY_MS);
482	<	assertTrue(p1.isTerminated());
1039	>	public void testTimedInvokeAny2() throws Exception {
1040	>	final ExecutorService e = new ScheduledThreadPoolExecutor(2);
1041	>	try (PoolCleaner cleaner = cleaner(e)) {
1042	>	try {
1043	>	e.invokeAny(new ArrayList<Callable<String>>(), MEDIUM_DELAY_MS, MILLISECONDS);
1044	>	shouldThrow();
1045	>	} catch (IllegalArgumentException success) {}
1046		}
1047	<	catch(Exception ex) {
1048	<	unexpectedException();
1047	>	}
1048	>
1049	>	/**
1050	>	* timed invokeAny(c) throws NPE if c has null elements
1051	>	*/
1052	>	public void testTimedInvokeAny3() throws Exception {
1053	>	CountDownLatch latch = new CountDownLatch(1);
1054	>	final ExecutorService e = new ScheduledThreadPoolExecutor(2);
1055	>	try (PoolCleaner cleaner = cleaner(e)) {
1056	>	List<Callable<String>> l = new ArrayList<>();
1057	>	l.add(latchAwaitingStringTask(latch));
1058	>	l.add(null);
1059	>	try {
1060	>	e.invokeAny(l, MEDIUM_DELAY_MS, MILLISECONDS);
1061	>	shouldThrow();
1062	>	} catch (NullPointerException success) {}
1063	>	latch.countDown();
1064		}
1065		}
1066
1067	+	/**
1068	+	* timed invokeAny(c) throws ExecutionException if no task completes
1069	+	*/
1070	+	public void testTimedInvokeAny4() throws Exception {
1071	+	final ExecutorService e = new ScheduledThreadPoolExecutor(2);
1072	+	try (PoolCleaner cleaner = cleaner(e)) {
1073	+	long startTime = System.nanoTime();
1074	+	List<Callable<String>> l = new ArrayList<>();
1075	+	l.add(new NPETask());
1076	+	try {
1077	+	e.invokeAny(l, LONG_DELAY_MS, MILLISECONDS);
1078	+	shouldThrow();
1079	+	} catch (ExecutionException success) {
1080	+	assertTrue(success.getCause() instanceof NullPointerException);
1081	+	}
1082	+	assertTrue(millisElapsedSince(startTime) < LONG_DELAY_MS);
1083	+	}
1084	+	}
1085
1086		/**
1087	<	* If setContinueExistingPeriodicTasksAfterShutdownPolicy is set false,
492	<	* periodic tasks are not cancelled at shutdown
1087	>	* timed invokeAny(c) returns result of some task
1088		*/
1089	<	public void testShutDown3() {
1090	<	try {
1091	<	ScheduledExecutor p1 = new ScheduledExecutor(1);
1092	<	p1.setContinueExistingPeriodicTasksAfterShutdownPolicy(false);
1093	<	ScheduledCancellable task =
1094	<	p1.scheduleAtFixedRate(new NoOpRunnable(), 5, 5, TimeUnit.MILLISECONDS);
1095	<	p1.shutdown();
1096	<	assertTrue(p1.isShutdown());
1097	<	BlockingQueue q = p1.getQueue();
1098	<	assertTrue(q.isEmpty());
504	<	Thread.sleep(SHORT_DELAY_MS);
505	<	assertTrue(p1.isTerminated());
1089	>	public void testTimedInvokeAny5() throws Exception {
1090	>	final ExecutorService e = new ScheduledThreadPoolExecutor(2);
1091	>	try (PoolCleaner cleaner = cleaner(e)) {
1092	>	long startTime = System.nanoTime();
1093	>	List<Callable<String>> l = new ArrayList<>();
1094	>	l.add(new StringTask());
1095	>	l.add(new StringTask());
1096	>	String result = e.invokeAny(l, LONG_DELAY_MS, MILLISECONDS);
1097	>	assertSame(TEST_STRING, result);
1098	>	assertTrue(millisElapsedSince(startTime) < LONG_DELAY_MS);
1099		}
1100	<	catch(Exception ex) {
1101	<	unexpectedException();
1100	>	}
1101	>
1102	>	/**
1103	>	* timed invokeAll(null) throws NPE
1104	>	*/
1105	>	public void testTimedInvokeAll1() throws Exception {
1106	>	final ExecutorService e = new ScheduledThreadPoolExecutor(2);
1107	>	try (PoolCleaner cleaner = cleaner(e)) {
1108	>	try {
1109	>	e.invokeAll(null, MEDIUM_DELAY_MS, MILLISECONDS);
1110	>	shouldThrow();
1111	>	} catch (NullPointerException success) {}
1112		}
1113		}
1114
1115		/**
1116	<	* if setContinueExistingPeriodicTasksAfterShutdownPolicy is true,
514	<	* periodic tasks are cancelled at shutdown
1116	>	* timed invokeAll(,,null) throws NPE
1117		*/
1118	<	public void testShutDown4() {
1119	<	ScheduledExecutor p1 = new ScheduledExecutor(1);
1120	<	try {
1121	<	p1.setContinueExistingPeriodicTasksAfterShutdownPolicy(true);
1122	<	ScheduledCancellable task =
1123	<	p1.scheduleAtFixedRate(new NoOpRunnable(), 5, 5, TimeUnit.MILLISECONDS);
1124	<	assertFalse(task.isCancelled());
1125	<	p1.shutdown();
1126	<	assertFalse(task.isCancelled());
525	<	assertFalse(p1.isTerminated());
526	<	assertTrue(p1.isShutdown());
527	<	Thread.sleep(SHORT_DELAY_MS);
528	<	assertFalse(task.isCancelled());
529	<	task.cancel(true);
530	<	assertTrue(task.isCancelled());
531	<	Thread.sleep(SHORT_DELAY_MS);
532	<	assertTrue(p1.isTerminated());
1118	>	public void testTimedInvokeAllNullTimeUnit() throws Exception {
1119	>	final ExecutorService e = new ScheduledThreadPoolExecutor(2);
1120	>	try (PoolCleaner cleaner = cleaner(e)) {
1121	>	List<Callable<String>> l = new ArrayList<>();
1122	>	l.add(new StringTask());
1123	>	try {
1124	>	e.invokeAll(l, MEDIUM_DELAY_MS, null);
1125	>	shouldThrow();
1126	>	} catch (NullPointerException success) {}
1127		}
1128	<	catch(Exception ex) {
1129	<	unexpectedException();
1128	>	}
1129	>
1130	>	/**
1131	>	* timed invokeAll(empty collection) returns empty collection
1132	>	*/
1133	>	public void testTimedInvokeAll2() throws Exception {
1134	>	final ExecutorService e = new ScheduledThreadPoolExecutor(2);
1135	>	try (PoolCleaner cleaner = cleaner(e)) {
1136	>	List<Future<String>> r = e.invokeAll(new ArrayList<Callable<String>>(),
1137	>	MEDIUM_DELAY_MS, MILLISECONDS);
1138	>	assertTrue(r.isEmpty());
1139		}
1140	<	finally {
1141	<	p1.shutdownNow();
1140	>	}
1141	>
1142	>	/**
1143	>	* timed invokeAll(c) throws NPE if c has null elements
1144	>	*/
1145	>	public void testTimedInvokeAll3() throws Exception {
1146	>	final ExecutorService e = new ScheduledThreadPoolExecutor(2);
1147	>	try (PoolCleaner cleaner = cleaner(e)) {
1148	>	List<Callable<String>> l = new ArrayList<>();
1149	>	l.add(new StringTask());
1150	>	l.add(null);
1151	>	try {
1152	>	e.invokeAll(l, MEDIUM_DELAY_MS, MILLISECONDS);
1153	>	shouldThrow();
1154	>	} catch (NullPointerException success) {}
1155	>	}
1156	>	}
1157	>
1158	>	/**
1159	>	* get of element of invokeAll(c) throws exception on failed task
1160	>	*/
1161	>	public void testTimedInvokeAll4() throws Exception {
1162	>	final ExecutorService e = new ScheduledThreadPoolExecutor(2);
1163	>	try (PoolCleaner cleaner = cleaner(e)) {
1164	>	List<Callable<String>> l = new ArrayList<>();
1165	>	l.add(new NPETask());
1166	>	List<Future<String>> futures =
1167	>	e.invokeAll(l, LONG_DELAY_MS, MILLISECONDS);
1168	>	assertEquals(1, futures.size());
1169	>	try {
1170	>	futures.get(0).get();
1171	>	shouldThrow();
1172	>	} catch (ExecutionException success) {
1173	>	assertTrue(success.getCause() instanceof NullPointerException);
1174	>	}
1175	>	}
1176	>	}
1177	>
1178	>	/**
1179	>	* timed invokeAll(c) returns results of all completed tasks
1180	>	*/
1181	>	public void testTimedInvokeAll5() throws Exception {
1182	>	final ExecutorService e = new ScheduledThreadPoolExecutor(2);
1183	>	try (PoolCleaner cleaner = cleaner(e)) {
1184	>	List<Callable<String>> l = new ArrayList<>();
1185	>	l.add(new StringTask());
1186	>	l.add(new StringTask());
1187	>	List<Future<String>> futures =
1188	>	e.invokeAll(l, LONG_DELAY_MS, MILLISECONDS);
1189	>	assertEquals(2, futures.size());
1190	>	for (Future<String> future : futures)
1191	>	assertSame(TEST_STRING, future.get());
1192	>	}
1193	>	}
1194	>
1195	>	/**
1196	>	* timed invokeAll(c) cancels tasks not completed by timeout
1197	>	*/
1198	>	public void testTimedInvokeAll6() throws Exception {
1199	>	for (long timeout = timeoutMillis();;) {
1200	>	final CountDownLatch done = new CountDownLatch(1);
1201	>	final Callable<String> waiter = new CheckedCallable<String>() {
1202	>	public String realCall() {
1203	>	try { done.await(LONG_DELAY_MS, MILLISECONDS); }
1204	>	catch (InterruptedException ok) {}
1205	>	return "1"; }};
1206	>	final ExecutorService p = new ScheduledThreadPoolExecutor(2);
1207	>	try (PoolCleaner cleaner = cleaner(p, done)) {
1208	>	List<Callable<String>> tasks = new ArrayList<>();
1209	>	tasks.add(new StringTask("0"));
1210	>	tasks.add(waiter);
1211	>	tasks.add(new StringTask("2"));
1212	>	long startTime = System.nanoTime();
1213	>	List<Future<String>> futures =
1214	>	p.invokeAll(tasks, timeout, MILLISECONDS);
1215	>	assertEquals(tasks.size(), futures.size());
1216	>	assertTrue(millisElapsedSince(startTime) >= timeout);
1217	>	for (Future future : futures)
1218	>	assertTrue(future.isDone());
1219	>	assertTrue(futures.get(1).isCancelled());
1220	>	try {
1221	>	assertEquals("0", futures.get(0).get());
1222	>	assertEquals("2", futures.get(2).get());
1223	>	break;
1224	>	} catch (CancellationException retryWithLongerTimeout) {
1225	>	timeout *= 2;
1226	>	if (timeout >= LONG_DELAY_MS / 2)
1227	>	fail("expected exactly one task to be cancelled");
1228	>	}
1229	>	}
1230	>	}
1231	>	}
1232	>
1233	>	/**
1234	>	* A fixed delay task with overflowing period should not prevent a
1235	>	* one-shot task from executing.
1236	>	* https://bugs.openjdk.java.net/browse/JDK-8051859
1237	>	*/
1238	>	public void testScheduleWithFixedDelay_overflow() throws Exception {
1239	>	final CountDownLatch delayedDone = new CountDownLatch(1);
1240	>	final CountDownLatch immediateDone = new CountDownLatch(1);
1241	>	final ScheduledThreadPoolExecutor p = new ScheduledThreadPoolExecutor(1);
1242	>	try (PoolCleaner cleaner = cleaner(p)) {
1243	>	final Runnable immediate = new Runnable() { public void run() {
1244	>	immediateDone.countDown();
1245	>	}};
1246	>	final Runnable delayed = new Runnable() { public void run() {
1247	>	delayedDone.countDown();
1248	>	p.submit(immediate);
1249	>	}};
1250	>	p.scheduleWithFixedDelay(delayed, 0L, Long.MAX_VALUE, SECONDS);
1251	>	await(delayedDone);
1252	>	await(immediateDone);
1253		}
1254		}
1255

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