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

Comparing jsr166/src/test/tck/ThreadPoolExecutorTest.java (file contents):
Revision 1.123 by jsr166, Sat Jul 15 23:15:21 2017 UTC vs.
Revision 1.124 by jsr166, Mon Jul 17 22:27:31 2017 UTC

#	Line 1059 | Line 1059 | public class ThreadPoolExecutorTest exte
1059		p.submit(task).get();
1060		}});
1061
1062	<	await(threadStarted);
1062	>	await(threadStarted); // ensure quiescence
1063		t.interrupt();
1064		awaitTermination(t);
1065		}
1066		}
1067
1068		/**
1069	<	* Submitted tasks are rejected when saturated.
1069	>	* Submitted tasks are rejected when saturated or shutdown
1070		*/
1071	<	@SuppressWarnings("FutureReturnValueIgnored")
1072	<	public void testSubmittedTasksRejectedWhenSaturated() {
1071	>	public void testSubmittedTasksRejectedWhenSaturatedOrShutdown() throws InterruptedException {
1072	>	final ThreadPoolExecutor p = new ThreadPoolExecutor(
1073	>	1, 1, 1, SECONDS, new ArrayBlockingQueue<Runnable>(1));
1074	>	final int saturatedSize = saturatedSize(p);
1075		final ThreadLocalRandom rnd = ThreadLocalRandom.current();
1076	+	final CountDownLatch threadsStarted = new CountDownLatch(p.getMaximumPoolSize());
1077		final CountDownLatch done = new CountDownLatch(1);
1078	<	final Runnable r = awaiter(done);
1079	<	final Callable<Boolean> c = new CheckedCallable() {
1080	<	public Boolean realCall() throws InterruptedException {
1081	<	await(done);
1082	<	return Boolean.TRUE;
1078	>	final Runnable r = () -> {
1079	>	threadsStarted.countDown();
1080	>	for (;;) {
1081	>	try {
1082	>	done.await();
1083	>	return;
1084	>	} catch (InterruptedException shutdownNowDeliberatelyIgnored) {}
1085		}};
1086	<	final ThreadPoolExecutor p = new ThreadPoolExecutor(
1087	<	1, 1, 1, SECONDS, new ArrayBlockingQueue<Runnable>(1));
1086	>	final Callable<Boolean> c = () -> {
1087	>	threadsStarted.countDown();
1088	>	for (;;) {
1089	>	try {
1090	>	done.await();
1091	>	return Boolean.TRUE;
1092	>	} catch (InterruptedException shutdownNowDeliberatelyIgnored) {}
1093	>	}};
1094	>	final boolean shutdownNow = rnd.nextBoolean();
1095
1096		try (PoolCleaner cleaner = cleaner(p, done)) {
1097		// saturate
1098	<	for (int i = saturatedSize(p); i--> 0; ) {
1099	<	switch (rnd.nextInt(3)) {
1098	>	for (int i = saturatedSize; i--> 0; ) {
1099	>	switch (rnd.nextInt(4)) {
1100		case 0: p.execute(r); break;
1101		case 1: assertFalse(p.submit(r).isDone()); break;
1102	<	case 2: assertFalse(p.submit(c).isDone()); break;
1103	<	}
1092	<	}
1093	<
1094	<	// check default handler
1095	<	assertTrue(p.getRejectedExecutionHandler() instanceof AbortPolicy);
1096	<	for (int i = 2; i--> 0; ) {
1097	<	try {
1098	<	p.execute(r);
1099	<	shouldThrow();
1100	<	} catch (RejectedExecutionException success) {}
1101	<	try {
1102	<	p.submit(r);
1103	<	shouldThrow();
1104	<	} catch (RejectedExecutionException success) {}
1105	<	try {
1106	<	p.submit(c);
1107	<	shouldThrow();
1108	<	} catch (RejectedExecutionException success) {}
1109	<	}
1110	<
1111	<	// check CallerRunsPolicy runs task in caller thread
1112	<	{
1113	<	RejectedExecutionHandler handler = new CallerRunsPolicy();
1114	<	p.setRejectedExecutionHandler(handler);
1115	<	assertSame(handler, p.getRejectedExecutionHandler());
1116	<	final AtomicReference<Thread> thread = new AtomicReference<>();
1117	<	p.execute(new Runnable() { public void run() {
1118	<	thread.set(Thread.currentThread()); }});
1119	<	assertSame(Thread.currentThread(), thread.get());
1120	<	}
1121	<
1122	<	// check DiscardPolicy does nothing
1123	<	{
1124	<	RejectedExecutionHandler handler = new DiscardPolicy();
1125	<	p.setRejectedExecutionHandler(handler);
1126	<	assertSame(handler, p.getRejectedExecutionHandler());
1127	<	final AtomicReference<Thread> thread = new AtomicReference<>();
1128	<	p.execute(new Runnable() { public void run() {
1129	<	thread.set(Thread.currentThread()); }});
1130	<	assertNull(thread.get());
1131	<	}
1132	<
1133	<	class Recorder implements RejectedExecutionHandler {
1134	<	public volatile Runnable r = null;
1135	<	public volatile ThreadPoolExecutor p = null;
1136	<	public void reset() { r = null; p = null; }
1137	<	public void rejectedExecution(Runnable r, ThreadPoolExecutor p) {
1138	<	assertNull(this.r);
1139	<	assertNull(this.p);
1140	<	this.r = r;
1141	<	this.p = p;
1102	>	case 2: assertFalse(p.submit(r, Boolean.TRUE).isDone()); break;
1103	>	case 3: assertFalse(p.submit(c).isDone()); break;
1104		}
1105		}
1106
1107	<	// check custom handler is invoked exactly once per task
1108	<	Recorder recorder = new Recorder();
1147	<	p.setRejectedExecutionHandler(recorder);
1148	<	assertSame(recorder, p.getRejectedExecutionHandler());
1149	<	for (int i = 2; i--> 0; ) {
1150	<	recorder.reset();
1151	<	p.execute(r);
1152	<	assertSame(r, recorder.r);
1153	<	assertSame(p, recorder.p);
1154	<
1155	<	recorder.reset();
1156	<	assertFalse(p.submit(r).isDone());
1157	<	assertTrue(recorder.r instanceof FutureTask);
1158	<	assertSame(p, recorder.p);
1159	<
1160	<	recorder.reset();
1161	<	assertFalse(p.submit(c).isDone());
1162	<	assertTrue(recorder.r instanceof FutureTask);
1163	<	assertSame(p, recorder.p);
1164	<	}
1165	<
1166	<	// check that pool was not perturbed by handlers
1167	<	assertEquals(2, p.getTaskCount());
1168	<	assertEquals(0, p.getCompletedTaskCount());
1169	<	assertEquals(0, p.getQueue().remainingCapacity());
1170	<	}
1171	<	assertEquals(saturatedSize(p), p.getCompletedTaskCount());
1172	<	}
1173	<
1174	<	/**
1175	<	* executor using CallerRunsPolicy runs task if saturated.
1176	<	*/
1177	<	public void testSaturatedExecute2() {
1178	<	final RejectedExecutionHandler handler = new CallerRunsPolicy();
1179	<	final ThreadPoolExecutor p = new ThreadPoolExecutor(
1180	<	1, 1, LONG_DELAY_MS, SECONDS, new ArrayBlockingQueue<Runnable>(1),
1181	<	handler);
1182	<	assertSame(handler, p.getRejectedExecutionHandler());
1183	<	final TrackedNoOpRunnable[] tasks = new TrackedNoOpRunnable[5];
1184	<	final CountDownLatch done = new CountDownLatch(1);
1185	<	try (PoolCleaner cleaner = cleaner(p, done)) {
1186	<	p.execute(awaiter(done));
1187	<
1188	<	for (int i = 0; i < tasks.length; i++)
1189	<	p.execute(tasks[i] = new TrackedNoOpRunnable());
1190	<
1191	<	for (int i = 1; i < tasks.length; i++)
1192	<	assertTrue(tasks[i].done);
1193	<	assertFalse(tasks[0].done); // waiting in queue
1194	<	}
1195	<	for (TrackedNoOpRunnable task : tasks)
1196	<	assertTrue(task.done);
1197	<	}
1198	<
1199	<	/**
1200	<	* executor using DiscardPolicy drops task if saturated.
1201	<	*/
1202	<	public void testSaturatedExecute3() {
1203	<	final RejectedExecutionHandler handler = new DiscardPolicy();
1204	<	final ThreadPoolExecutor p = new ThreadPoolExecutor(
1205	<	1, 1, LONG_DELAY_MS, SECONDS, new ArrayBlockingQueue<Runnable>(1),
1206	<	handler);
1207	<	assertSame(handler, p.getRejectedExecutionHandler());
1208	<	final TrackedNoOpRunnable[] tasks = new TrackedNoOpRunnable[5];
1209	<	final CountDownLatch done = new CountDownLatch(1);
1210	<	try (PoolCleaner cleaner = cleaner(p, done)) {
1211	<	p.execute(awaiter(done));
1212	<
1213	<	for (int i = 0; i < tasks.length; i++)
1214	<	p.execute(tasks[i] = new TrackedNoOpRunnable());
1107	>	await(threadsStarted);
1108	>	assertTaskSubmissionsAreRejected(p);
1109
1110	<	for (int i = 1; i < tasks.length; i++)
1111	<	assertFalse(tasks[i].done);
1112	<	}
1113	<	for (int i = 1; i < tasks.length; i++)
1114	<	assertFalse(tasks[i].done);
1115	<	assertTrue(tasks[0].done); // was waiting in queue
1110	>	if (shutdownNow)
1111	>	p.shutdownNow();
1112	>	else
1113	>	p.shutdown();
1114	>	// Pool is shutdown, but not yet terminated
1115	>	assertTaskSubmissionsAreRejected(p);
1116	>	assertFalse(p.isTerminated());
1117	>
1118	>	done.countDown();   // release blocking tasks
1119	>	assertTrue(p.awaitTermination(LONG_DELAY_MS, MILLISECONDS));
1120	>
1121	>	assertTaskSubmissionsAreRejected(p);
1122	>	}
1123	>	assertEquals(saturatedSize(p)
1124	>	- (shutdownNow ? p.getQueue().remainingCapacity() : 0),
1125	>	p.getCompletedTaskCount());
1126		}
1127
1128		/**
1129		* executor using DiscardOldestPolicy drops oldest task if saturated.
1130		*/
1131	<	public void testSaturatedExecute4() {
1131	>	public void testSaturatedExecute_DiscardOldestPolicy() {
1132		final CountDownLatch done = new CountDownLatch(1);
1133		LatchAwaiter r1 = awaiter(done);
1134		LatchAwaiter r2 = awaiter(done);
#	Line 1251 | Line 1155 | public class ThreadPoolExecutorTest exte
1155		}
1156
1157		/**
1254	–	* execute throws RejectedExecutionException if shutdown
1255	–	*/
1256	–	public void testRejectedExecutionExceptionOnShutdown() {
1257	–	final ThreadPoolExecutor p =
1258	–	new ThreadPoolExecutor(1, 1,
1259	–	LONG_DELAY_MS, MILLISECONDS,
1260	–	new ArrayBlockingQueue<Runnable>(1));
1261	–	try { p.shutdown(); } catch (SecurityException ok) { return; }
1262	–	try (PoolCleaner cleaner = cleaner(p)) {
1263	–	try {
1264	–	p.execute(new NoOpRunnable());
1265	–	shouldThrow();
1266	–	} catch (RejectedExecutionException success) {}
1267	–	}
1268	–	}
1269	–
1270	–	/**
1271	–	* execute using CallerRunsPolicy drops task on shutdown
1272	–	*/
1273	–	public void testCallerRunsOnShutdown() {
1274	–	RejectedExecutionHandler h = new CallerRunsPolicy();
1275	–	final ThreadPoolExecutor p =
1276	–	new ThreadPoolExecutor(1, 1,
1277	–	LONG_DELAY_MS, MILLISECONDS,
1278	–	new ArrayBlockingQueue<Runnable>(1), h);
1279	–
1280	–	try { p.shutdown(); } catch (SecurityException ok) { return; }
1281	–	try (PoolCleaner cleaner = cleaner(p)) {
1282	–	TrackedNoOpRunnable r = new TrackedNoOpRunnable();
1283	–	p.execute(r);
1284	–	assertFalse(r.done);
1285	–	}
1286	–	}
1287	–
1288	–	/**
1289	–	* execute using DiscardPolicy drops task on shutdown
1290	–	*/
1291	–	public void testDiscardOnShutdown() {
1292	–	final ThreadPoolExecutor p =
1293	–	new ThreadPoolExecutor(1, 1,
1294	–	LONG_DELAY_MS, MILLISECONDS,
1295	–	new ArrayBlockingQueue<Runnable>(1),
1296	–	new DiscardPolicy());
1297	–
1298	–	try { p.shutdown(); } catch (SecurityException ok) { return; }
1299	–	try (PoolCleaner cleaner = cleaner(p)) {
1300	–	TrackedNoOpRunnable r = new TrackedNoOpRunnable();
1301	–	p.execute(r);
1302	–	assertFalse(r.done);
1303	–	}
1304	–	}
1305	–
1306	–	/**
1158		* execute using DiscardOldestPolicy drops task on shutdown
1159		*/
1160		public void testDiscardOldestOnShutdown() {
#	Line 1322 | Line 1173 | public class ThreadPoolExecutorTest exte
1173		}
1174
1175		/**
1176	<	* execute(null) throws NPE
1176	>	* Submitting null tasks throws NullPointerException
1177		*/
1178	<	public void testExecuteNull() {
1178	>	public void testNullTaskSubmission() {
1179		final ThreadPoolExecutor p =
1180		new ThreadPoolExecutor(1, 2,
1181		1L, SECONDS,
1182		new ArrayBlockingQueue<Runnable>(10));
1183		try (PoolCleaner cleaner = cleaner(p)) {
1184	<	try {
1334	<	p.execute(null);
1335	<	shouldThrow();
1336	<	} catch (NullPointerException success) {}
1184	>	assertNullTaskSubmissionThrowsNullPointerException(p);
1185		}
1186		}
1187

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