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

Comparing jsr166/src/test/tck/ThreadPoolExecutorTest.java (file contents):
Revision 1.122 by jsr166, Sat Jul 15 18:42:01 2017 UTC vs.
Revision 1.125 by jsr166, Wed Apr 3 20:55:45 2019 UTC

#	Line 28 | Line 28 | import java.util.concurrent.RejectedExec
28		import java.util.concurrent.RejectedExecutionHandler;
29		import java.util.concurrent.SynchronousQueue;
30		import java.util.concurrent.ThreadFactory;
31	+	import java.util.concurrent.ThreadLocalRandom;
32		import java.util.concurrent.ThreadPoolExecutor;
33		import java.util.concurrent.ThreadPoolExecutor.AbortPolicy;
34		import java.util.concurrent.ThreadPoolExecutor.CallerRunsPolicy;
#	Line 1058 | 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	<	* execute throws RejectedExecutionException if saturated.
1069	>	* Submitted tasks are rejected when saturated or shutdown
1070		*/
1071	<	public void testSaturatedExecute() {
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 ThreadPoolExecutor p =
1079	<	new ThreadPoolExecutor(1, 1,
1080	<	LONG_DELAY_MS, MILLISECONDS,
1075	<	new ArrayBlockingQueue<Runnable>(1));
1076	<	try (PoolCleaner cleaner = cleaner(p, done)) {
1077	<	Runnable task = new CheckedRunnable() {
1078	<	public void realRun() throws InterruptedException {
1079	<	await(done);
1080	<	}};
1081	<	for (int i = 0; i < 2; ++i)
1082	<	p.execute(task);
1083	<	for (int i = 0; i < 2; ++i) {
1078	>	final Runnable r = () -> {
1079	>	threadsStarted.countDown();
1080	>	for (;;) {
1081		try {
1082	<	p.execute(task);
1083	<	shouldThrow();
1084	<	} catch (RejectedExecutionException success) {}
1085	<	assertTrue(p.getTaskCount() <= 2);
1086	<	}
1087	<	}
1088	<	}
1092	<
1093	<	/**
1094	<	* submit(runnable) throws RejectedExecutionException if saturated.
1095	<	*/
1096	<	public void testSaturatedSubmitRunnable() {
1097	<	final CountDownLatch done = new CountDownLatch(1);
1098	<	final ThreadPoolExecutor p =
1099	<	new ThreadPoolExecutor(1, 1,
1100	<	LONG_DELAY_MS, MILLISECONDS,
1101	<	new ArrayBlockingQueue<Runnable>(1));
1102	<	try (PoolCleaner cleaner = cleaner(p, done)) {
1103	<	Runnable task = new CheckedRunnable() {
1104	<	public void realRun() throws InterruptedException {
1105	<	await(done);
1106	<	}};
1107	<	for (int i = 0; i < 2; ++i)
1108	<	p.submit(task);
1109	<	for (int i = 0; i < 2; ++i) {
1082	>	done.await();
1083	>	return;
1084	>	} catch (InterruptedException shutdownNowDeliberatelyIgnored) {}
1085	>	}};
1086	>	final Callable<Boolean> c = () -> {
1087	>	threadsStarted.countDown();
1088	>	for (;;) {
1089		try {
1090	<	p.execute(task);
1091	<	shouldThrow();
1092	<	} catch (RejectedExecutionException success) {}
1093	<	assertTrue(p.getTaskCount() <= 2);
1094	<	}
1116	<	}
1117	<	}
1090	>	done.await();
1091	>	return Boolean.TRUE;
1092	>	} catch (InterruptedException shutdownNowDeliberatelyIgnored) {}
1093	>	}};
1094	>	final boolean shutdownNow = rnd.nextBoolean();
1095
1119	–	/**
1120	–	* submit(callable) throws RejectedExecutionException if saturated.
1121	–	*/
1122	–	public void testSaturatedSubmitCallable() {
1123	–	final CountDownLatch done = new CountDownLatch(1);
1124	–	final ThreadPoolExecutor p =
1125	–	new ThreadPoolExecutor(1, 1,
1126	–	LONG_DELAY_MS, MILLISECONDS,
1127	–	new ArrayBlockingQueue<Runnable>(1));
1096		try (PoolCleaner cleaner = cleaner(p, done)) {
1097	<	Runnable task = new CheckedRunnable() {
1098	<	public void realRun() throws InterruptedException {
1099	<	await(done);
1100	<	}};
1101	<	for (int i = 0; i < 2; ++i)
1102	<	p.execute(task);
1103	<	for (int i = 0; i < 2; ++i) {
1104	<	try {
1137	<	p.execute(task);
1138	<	shouldThrow();
1139	<	} catch (RejectedExecutionException success) {}
1140	<	assertTrue(p.getTaskCount() <= 2);
1097	>	// saturate
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(r, Boolean.TRUE).isDone()); break;
1103	>	case 3: assertFalse(p.submit(c).isDone()); break;
1104	>	}
1105		}
1142	–	}
1143	–	}
1106
1107	<	/**
1108	<	* executor using CallerRunsPolicy runs task if saturated.
1147	<	*/
1148	<	public void testSaturatedExecute2() {
1149	<	final ThreadPoolExecutor p =
1150	<	new ThreadPoolExecutor(1, 1,
1151	<	LONG_DELAY_MS,
1152	<	MILLISECONDS,
1153	<	new ArrayBlockingQueue<Runnable>(1),
1154	<	new CallerRunsPolicy());
1155	<	try (PoolCleaner cleaner = cleaner(p)) {
1156	<	final CountDownLatch done = new CountDownLatch(1);
1157	<	Runnable blocker = new CheckedRunnable() {
1158	<	public void realRun() throws InterruptedException {
1159	<	await(done);
1160	<	}};
1161	<	p.execute(blocker);
1162	<	TrackedNoOpRunnable[] tasks = new TrackedNoOpRunnable[5];
1163	<	for (int i = 0; i < tasks.length; i++)
1164	<	tasks[i] = new TrackedNoOpRunnable();
1165	<	for (int i = 0; i < tasks.length; i++)
1166	<	p.execute(tasks[i]);
1167	<	for (int i = 1; i < tasks.length; i++)
1168	<	assertTrue(tasks[i].done);
1169	<	assertFalse(tasks[0].done); // waiting in queue
1170	<	done.countDown();
1171	<	}
1172	<	}
1107	>	await(threadsStarted);
1108	>	assertTaskSubmissionsAreRejected(p);
1109
1110	<	/**
1111	<	* executor using DiscardPolicy drops task if saturated.
1112	<	*/
1113	<	public void testSaturatedExecute3() {
1114	<	final CountDownLatch done = new CountDownLatch(1);
1115	<	final TrackedNoOpRunnable[] tasks = new TrackedNoOpRunnable[5];
1116	<	for (int i = 0; i < tasks.length; ++i)
1181	<	tasks[i] = new TrackedNoOpRunnable();
1182	<	final ThreadPoolExecutor p =
1183	<	new ThreadPoolExecutor(1, 1,
1184	<	LONG_DELAY_MS, MILLISECONDS,
1185	<	new ArrayBlockingQueue<Runnable>(1),
1186	<	new DiscardPolicy());
1187	<	try (PoolCleaner cleaner = cleaner(p, done)) {
1188	<	p.execute(awaiter(done));
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	<	for (TrackedNoOpRunnable task : tasks)
1119	<	p.execute(task);
1120	<	for (int i = 1; i < tasks.length; i++)
1121	<	assertFalse(tasks[i].done);
1122	<	}
1123	<	for (int i = 1; i < tasks.length; i++)
1124	<	assertFalse(tasks[i].done);
1125	<	assertTrue(tasks[0].done); // was waiting in queue
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 1227 | Line 1155 | public class ThreadPoolExecutorTest exte
1155		}
1156
1157		/**
1230	–	* execute throws RejectedExecutionException if shutdown
1231	–	*/
1232	–	public void testRejectedExecutionExceptionOnShutdown() {
1233	–	final ThreadPoolExecutor p =
1234	–	new ThreadPoolExecutor(1, 1,
1235	–	LONG_DELAY_MS, MILLISECONDS,
1236	–	new ArrayBlockingQueue<Runnable>(1));
1237	–	try { p.shutdown(); } catch (SecurityException ok) { return; }
1238	–	try (PoolCleaner cleaner = cleaner(p)) {
1239	–	try {
1240	–	p.execute(new NoOpRunnable());
1241	–	shouldThrow();
1242	–	} catch (RejectedExecutionException success) {}
1243	–	}
1244	–	}
1245	–
1246	–	/**
1247	–	* execute using CallerRunsPolicy drops task on shutdown
1248	–	*/
1249	–	public void testCallerRunsOnShutdown() {
1250	–	RejectedExecutionHandler h = new CallerRunsPolicy();
1251	–	final ThreadPoolExecutor p =
1252	–	new ThreadPoolExecutor(1, 1,
1253	–	LONG_DELAY_MS, MILLISECONDS,
1254	–	new ArrayBlockingQueue<Runnable>(1), h);
1255	–
1256	–	try { p.shutdown(); } catch (SecurityException ok) { return; }
1257	–	try (PoolCleaner cleaner = cleaner(p)) {
1258	–	TrackedNoOpRunnable r = new TrackedNoOpRunnable();
1259	–	p.execute(r);
1260	–	assertFalse(r.done);
1261	–	}
1262	–	}
1263	–
1264	–	/**
1265	–	* execute using DiscardPolicy drops task on shutdown
1266	–	*/
1267	–	public void testDiscardOnShutdown() {
1268	–	final ThreadPoolExecutor p =
1269	–	new ThreadPoolExecutor(1, 1,
1270	–	LONG_DELAY_MS, MILLISECONDS,
1271	–	new ArrayBlockingQueue<Runnable>(1),
1272	–	new DiscardPolicy());
1273	–
1274	–	try { p.shutdown(); } catch (SecurityException ok) { return; }
1275	–	try (PoolCleaner cleaner = cleaner(p)) {
1276	–	TrackedNoOpRunnable r = new TrackedNoOpRunnable();
1277	–	p.execute(r);
1278	–	assertFalse(r.done);
1279	–	}
1280	–	}
1281	–
1282	–	/**
1158		* execute using DiscardOldestPolicy drops task on shutdown
1159		*/
1160		public void testDiscardOldestOnShutdown() {
#	Line 1298 | 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 {
1310	<	p.execute(null);
1311	<	shouldThrow();
1312	<	} catch (NullPointerException success) {}
1184	>	assertNullTaskSubmissionThrowsNullPointerException(p);
1185		}
1186		}
1187
#	Line 2112 | Line 1984 | public class ThreadPoolExecutorTest exte
1984		assertTrue(p.getQueue().isEmpty());
1985		}
1986
1987	+	public void testThreadFactoryReturnsTerminatedThread_shouldThrow() {
1988	+	if (!testImplementationDetails)
1989	+	return;
1990	+
1991	+	ThreadFactory returnsTerminatedThread = runnableIgnored -> {
1992	+	Thread thread = new Thread(() -> {});
1993	+	thread.start();
1994	+	try { thread.join(); }
1995	+	catch (InterruptedException ex) { throw new Error(ex); }
1996	+	return thread;
1997	+	};
1998	+	ThreadPoolExecutor p =
1999	+	new ThreadPoolExecutor(1, 1, 1, SECONDS,
2000	+	new ArrayBlockingQueue<Runnable>(1),
2001	+	returnsTerminatedThread);
2002	+	try (PoolCleaner cleaner = cleaner(p)) {
2003	+	assertThrows(IllegalThreadStateException.class,
2004	+	() -> p.execute(() -> {}));
2005	+	}
2006	+	}
2007	+
2008	+	public void testThreadFactoryReturnsStartedThread_shouldThrow() {
2009	+	if (!testImplementationDetails)
2010	+	return;
2011	+
2012	+	CountDownLatch latch = new CountDownLatch(1);
2013	+	Runnable awaitLatch = () -> {
2014	+	try { latch.await(); }
2015	+	catch (InterruptedException ex) { throw new Error(ex); }};
2016	+	ThreadFactory returnsStartedThread = runnable -> {
2017	+	Thread thread = new Thread(awaitLatch);
2018	+	thread.start();
2019	+	return thread;
2020	+	};
2021	+	ThreadPoolExecutor p =
2022	+	new ThreadPoolExecutor(1, 1, 1, SECONDS,
2023	+	new ArrayBlockingQueue<Runnable>(1),
2024	+	returnsStartedThread);
2025	+	try (PoolCleaner cleaner = cleaner(p)) {
2026	+	assertThrows(IllegalThreadStateException.class,
2027	+	() -> p.execute(() -> {}));
2028	+	latch.countDown();
2029	+	}
2030	+	}
2031	+
2032		}

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