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); |
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() { |
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 |
|
|
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 |
|
} |