Calin Juravle | 8f0d92b | 2013-08-01 17:26:00 +0100 | [diff] [blame] | 1 | /* |
| 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 | */ |
| 6 | |
| 7 | package jsr166; |
| 8 | |
| 9 | import junit.framework.*; |
| 10 | import java.util.ArrayList; |
| 11 | import java.util.Collection; |
| 12 | import java.util.List; |
| 13 | import java.util.concurrent.Executors; |
| 14 | import java.util.concurrent.ExecutorService; |
| 15 | import java.util.concurrent.AbstractExecutorService; |
| 16 | import java.util.concurrent.CountDownLatch; |
| 17 | import java.util.concurrent.Callable; |
| 18 | import java.util.concurrent.Future; |
| 19 | import java.util.concurrent.ExecutionException; |
| 20 | import java.util.concurrent.CancellationException; |
| 21 | import java.util.concurrent.RejectedExecutionException; |
| 22 | import java.util.concurrent.ForkJoinPool; |
| 23 | import java.util.concurrent.ForkJoinTask; |
| 24 | import java.util.concurrent.ForkJoinWorkerThread; |
| 25 | import java.util.concurrent.RecursiveTask; |
| 26 | import java.util.concurrent.TimeUnit; |
| 27 | import java.util.concurrent.atomic.AtomicBoolean; |
| 28 | import java.util.concurrent.locks.ReentrantLock; |
| 29 | import static java.util.concurrent.TimeUnit.MILLISECONDS; |
| 30 | import static java.util.concurrent.TimeUnit.NANOSECONDS; |
| 31 | import java.security.AccessControlException; |
| 32 | import java.security.Policy; |
| 33 | import java.security.PrivilegedAction; |
| 34 | import java.security.PrivilegedExceptionAction; |
| 35 | |
| 36 | public class ForkJoinPoolTest extends JSR166TestCase { |
| 37 | |
| 38 | /* |
| 39 | * Testing coverage notes: |
| 40 | * |
| 41 | * 1. shutdown and related methods are tested via super.joinPool. |
| 42 | * |
| 43 | * 2. newTaskFor and adapters are tested in submit/invoke tests |
| 44 | * |
| 45 | * 3. We cannot portably test monitoring methods such as |
| 46 | * getStealCount() since they rely ultimately on random task |
| 47 | * stealing that may cause tasks not to be stolen/propagated |
| 48 | * across threads, especially on uniprocessors. |
| 49 | * |
| 50 | * 4. There are no independently testable ForkJoinWorkerThread |
| 51 | * methods, but they are covered here and in task tests. |
| 52 | */ |
| 53 | |
| 54 | // Some classes to test extension and factory methods |
| 55 | |
| 56 | static class MyHandler implements Thread.UncaughtExceptionHandler { |
| 57 | volatile int catches = 0; |
| 58 | public void uncaughtException(Thread t, Throwable e) { |
| 59 | ++catches; |
| 60 | } |
| 61 | } |
| 62 | |
| 63 | // to test handlers |
| 64 | static class FailingFJWSubclass extends ForkJoinWorkerThread { |
| 65 | public FailingFJWSubclass(ForkJoinPool p) { super(p) ; } |
| 66 | protected void onStart() { super.onStart(); throw new Error(); } |
| 67 | } |
| 68 | |
| 69 | static class FailingThreadFactory |
| 70 | implements ForkJoinPool.ForkJoinWorkerThreadFactory { |
| 71 | volatile int calls = 0; |
| 72 | public ForkJoinWorkerThread newThread(ForkJoinPool p) { |
| 73 | if (++calls > 1) return null; |
| 74 | return new FailingFJWSubclass(p); |
| 75 | } |
| 76 | } |
| 77 | |
| 78 | static class SubFJP extends ForkJoinPool { // to expose protected |
| 79 | SubFJP() { super(1); } |
| 80 | public int drainTasksTo(Collection<? super ForkJoinTask<?>> c) { |
| 81 | return super.drainTasksTo(c); |
| 82 | } |
| 83 | public ForkJoinTask<?> pollSubmission() { |
| 84 | return super.pollSubmission(); |
| 85 | } |
| 86 | } |
| 87 | |
| 88 | static class ManagedLocker implements ForkJoinPool.ManagedBlocker { |
| 89 | final ReentrantLock lock; |
| 90 | boolean hasLock = false; |
| 91 | ManagedLocker(ReentrantLock lock) { this.lock = lock; } |
| 92 | public boolean block() { |
| 93 | if (!hasLock) |
| 94 | lock.lock(); |
| 95 | return true; |
| 96 | } |
| 97 | public boolean isReleasable() { |
| 98 | return hasLock || (hasLock = lock.tryLock()); |
| 99 | } |
| 100 | } |
| 101 | |
| 102 | // A simple recursive task for testing |
| 103 | static final class FibTask extends RecursiveTask<Integer> { |
| 104 | final int number; |
| 105 | FibTask(int n) { number = n; } |
| 106 | public Integer compute() { |
| 107 | int n = number; |
| 108 | if (n <= 1) |
| 109 | return n; |
| 110 | FibTask f1 = new FibTask(n - 1); |
| 111 | f1.fork(); |
| 112 | return (new FibTask(n - 2)).compute() + f1.join(); |
| 113 | } |
| 114 | } |
| 115 | |
| 116 | // A failing task for testing |
| 117 | static final class FailingTask extends ForkJoinTask<Void> { |
| 118 | public final Void getRawResult() { return null; } |
| 119 | protected final void setRawResult(Void mustBeNull) { } |
| 120 | protected final boolean exec() { throw new Error(); } |
| 121 | FailingTask() {} |
| 122 | } |
| 123 | |
| 124 | // Fib needlessly using locking to test ManagedBlockers |
| 125 | static final class LockingFibTask extends RecursiveTask<Integer> { |
| 126 | final int number; |
| 127 | final ManagedLocker locker; |
| 128 | final ReentrantLock lock; |
| 129 | LockingFibTask(int n, ManagedLocker locker, ReentrantLock lock) { |
| 130 | number = n; |
| 131 | this.locker = locker; |
| 132 | this.lock = lock; |
| 133 | } |
| 134 | public Integer compute() { |
| 135 | int n; |
| 136 | LockingFibTask f1 = null; |
| 137 | LockingFibTask f2 = null; |
| 138 | locker.block(); |
| 139 | n = number; |
| 140 | if (n > 1) { |
| 141 | f1 = new LockingFibTask(n - 1, locker, lock); |
| 142 | f2 = new LockingFibTask(n - 2, locker, lock); |
| 143 | } |
| 144 | lock.unlock(); |
| 145 | if (n <= 1) |
| 146 | return n; |
| 147 | else { |
| 148 | f1.fork(); |
| 149 | return f2.compute() + f1.join(); |
| 150 | } |
| 151 | } |
| 152 | } |
| 153 | |
| 154 | /** |
| 155 | * Successfully constructed pool reports default factory, |
| 156 | * parallelism and async mode policies, no active threads or |
| 157 | * tasks, and quiescent running state. |
| 158 | */ |
| 159 | public void testDefaultInitialState() { |
| 160 | ForkJoinPool p = new ForkJoinPool(1); |
| 161 | try { |
| 162 | assertSame(ForkJoinPool.defaultForkJoinWorkerThreadFactory, |
| 163 | p.getFactory()); |
| 164 | assertFalse(p.getAsyncMode()); |
| 165 | assertEquals(0, p.getActiveThreadCount()); |
| 166 | assertEquals(0, p.getStealCount()); |
| 167 | assertEquals(0, p.getQueuedTaskCount()); |
| 168 | assertEquals(0, p.getQueuedSubmissionCount()); |
| 169 | assertFalse(p.hasQueuedSubmissions()); |
| 170 | assertFalse(p.isShutdown()); |
| 171 | assertFalse(p.isTerminating()); |
| 172 | assertFalse(p.isTerminated()); |
| 173 | } finally { |
| 174 | joinPool(p); |
| 175 | } |
| 176 | } |
| 177 | |
| 178 | /** |
| 179 | * Constructor throws if size argument is less than zero |
| 180 | */ |
| 181 | public void testConstructor1() { |
| 182 | try { |
| 183 | new ForkJoinPool(-1); |
| 184 | shouldThrow(); |
| 185 | } catch (IllegalArgumentException success) {} |
| 186 | } |
| 187 | |
| 188 | /** |
| 189 | * Constructor throws if factory argument is null |
| 190 | */ |
| 191 | public void testConstructor2() { |
| 192 | try { |
| 193 | new ForkJoinPool(1, null, null, false); |
| 194 | shouldThrow(); |
| 195 | } catch (NullPointerException success) {} |
| 196 | } |
| 197 | |
| 198 | /** |
| 199 | * getParallelism returns size set in constructor |
| 200 | */ |
| 201 | public void testGetParallelism() { |
| 202 | ForkJoinPool p = new ForkJoinPool(1); |
| 203 | try { |
| 204 | assertEquals(1, p.getParallelism()); |
| 205 | } finally { |
| 206 | joinPool(p); |
| 207 | } |
| 208 | } |
| 209 | |
| 210 | /** |
| 211 | * getPoolSize returns number of started workers. |
| 212 | */ |
| 213 | public void testGetPoolSize() { |
| 214 | ForkJoinPool p = new ForkJoinPool(1); |
| 215 | try { |
| 216 | assertEquals(0, p.getActiveThreadCount()); |
| 217 | Future<String> future = p.submit(new StringTask()); |
| 218 | assertEquals(1, p.getPoolSize()); |
| 219 | } finally { |
| 220 | joinPool(p); |
| 221 | } |
| 222 | } |
| 223 | |
| 224 | /** |
| 225 | * awaitTermination on a non-shutdown pool times out |
| 226 | */ |
| 227 | public void testAwaitTermination_timesOut() throws InterruptedException { |
| 228 | ForkJoinPool p = new ForkJoinPool(1); |
| 229 | assertFalse(p.isTerminated()); |
| 230 | assertFalse(p.awaitTermination(Long.MIN_VALUE, NANOSECONDS)); |
| 231 | assertFalse(p.awaitTermination(Long.MIN_VALUE, MILLISECONDS)); |
| 232 | assertFalse(p.awaitTermination(-1L, NANOSECONDS)); |
| 233 | assertFalse(p.awaitTermination(-1L, MILLISECONDS)); |
| 234 | assertFalse(p.awaitTermination(0L, NANOSECONDS)); |
| 235 | assertFalse(p.awaitTermination(0L, MILLISECONDS)); |
| 236 | long timeoutNanos = 999999L; |
| 237 | long startTime = System.nanoTime(); |
| 238 | assertFalse(p.awaitTermination(timeoutNanos, NANOSECONDS)); |
| 239 | assertTrue(System.nanoTime() - startTime >= timeoutNanos); |
| 240 | assertFalse(p.isTerminated()); |
| 241 | startTime = System.nanoTime(); |
| 242 | long timeoutMillis = timeoutMillis(); |
| 243 | assertFalse(p.awaitTermination(timeoutMillis, MILLISECONDS)); |
| 244 | assertTrue(millisElapsedSince(startTime) >= timeoutMillis); |
| 245 | assertFalse(p.isTerminated()); |
| 246 | p.shutdown(); |
| 247 | assertTrue(p.awaitTermination(LONG_DELAY_MS, MILLISECONDS)); |
| 248 | assertTrue(p.isTerminated()); |
| 249 | } |
| 250 | |
| 251 | /** |
| 252 | * setUncaughtExceptionHandler changes handler for uncaught exceptions. |
| 253 | * |
| 254 | * Additionally tests: Overriding ForkJoinWorkerThread.onStart |
| 255 | * performs its defined action |
| 256 | */ |
| 257 | public void testSetUncaughtExceptionHandler() throws InterruptedException { |
| 258 | final CountDownLatch uehInvoked = new CountDownLatch(1); |
| 259 | final Thread.UncaughtExceptionHandler eh = |
| 260 | new Thread.UncaughtExceptionHandler() { |
| 261 | public void uncaughtException(Thread t, Throwable e) { |
| 262 | uehInvoked.countDown(); |
| 263 | }}; |
| 264 | ForkJoinPool p = new ForkJoinPool(1, new FailingThreadFactory(), |
| 265 | eh, false); |
| 266 | try { |
| 267 | assertSame(eh, p.getUncaughtExceptionHandler()); |
| 268 | try { |
| 269 | p.execute(new FibTask(8)); |
| 270 | assertTrue(uehInvoked.await(MEDIUM_DELAY_MS, MILLISECONDS)); |
| 271 | } catch (RejectedExecutionException ok) { |
| 272 | } |
| 273 | } finally { |
| 274 | p.shutdownNow(); // failure might have prevented processing task |
| 275 | joinPool(p); |
| 276 | } |
| 277 | } |
| 278 | |
| 279 | /** |
| 280 | * After invoking a single task, isQuiescent eventually becomes |
| 281 | * true, at which time queues are empty, threads are not active, |
| 282 | * the task has completed successfully, and construction |
| 283 | * parameters continue to hold |
| 284 | */ |
| 285 | public void testIsQuiescent() throws Exception { |
| 286 | ForkJoinPool p = new ForkJoinPool(2); |
| 287 | try { |
| 288 | assertTrue(p.isQuiescent()); |
| 289 | long startTime = System.nanoTime(); |
| 290 | FibTask f = new FibTask(20); |
| 291 | p.invoke(f); |
| 292 | assertSame(ForkJoinPool.defaultForkJoinWorkerThreadFactory, |
| 293 | p.getFactory()); |
| 294 | while (! p.isQuiescent()) { |
| 295 | if (millisElapsedSince(startTime) > LONG_DELAY_MS) |
| 296 | throw new AssertionFailedError("timed out"); |
| 297 | assertFalse(p.getAsyncMode()); |
| 298 | assertFalse(p.isShutdown()); |
| 299 | assertFalse(p.isTerminating()); |
| 300 | assertFalse(p.isTerminated()); |
| 301 | Thread.yield(); |
| 302 | } |
| 303 | |
| 304 | assertTrue(p.isQuiescent()); |
| 305 | assertFalse(p.getAsyncMode()); |
| 306 | assertEquals(0, p.getActiveThreadCount()); |
| 307 | assertEquals(0, p.getQueuedTaskCount()); |
| 308 | assertEquals(0, p.getQueuedSubmissionCount()); |
| 309 | assertFalse(p.hasQueuedSubmissions()); |
| 310 | assertFalse(p.isShutdown()); |
| 311 | assertFalse(p.isTerminating()); |
| 312 | assertFalse(p.isTerminated()); |
| 313 | assertTrue(f.isDone()); |
| 314 | assertEquals(6765, (int) f.get()); |
| 315 | } finally { |
| 316 | joinPool(p); |
| 317 | } |
| 318 | } |
| 319 | |
| 320 | /** |
| 321 | * Completed submit(ForkJoinTask) returns result |
| 322 | */ |
| 323 | public void testSubmitForkJoinTask() throws Throwable { |
| 324 | ForkJoinPool p = new ForkJoinPool(1); |
| 325 | try { |
| 326 | ForkJoinTask<Integer> f = p.submit(new FibTask(8)); |
| 327 | assertEquals(21, (int) f.get()); |
| 328 | } finally { |
| 329 | joinPool(p); |
| 330 | } |
| 331 | } |
| 332 | |
| 333 | /** |
| 334 | * A task submitted after shutdown is rejected |
| 335 | */ |
| 336 | public void testSubmitAfterShutdown() { |
| 337 | ForkJoinPool p = new ForkJoinPool(1); |
| 338 | try { |
| 339 | p.shutdown(); |
| 340 | assertTrue(p.isShutdown()); |
| 341 | try { |
| 342 | ForkJoinTask<Integer> f = p.submit(new FibTask(8)); |
| 343 | shouldThrow(); |
| 344 | } catch (RejectedExecutionException success) {} |
| 345 | } finally { |
| 346 | joinPool(p); |
| 347 | } |
| 348 | } |
| 349 | |
| 350 | /** |
| 351 | * Pool maintains parallelism when using ManagedBlocker |
| 352 | */ |
| 353 | public void testBlockingForkJoinTask() throws Throwable { |
| 354 | ForkJoinPool p = new ForkJoinPool(4); |
| 355 | try { |
| 356 | ReentrantLock lock = new ReentrantLock(); |
| 357 | ManagedLocker locker = new ManagedLocker(lock); |
| 358 | ForkJoinTask<Integer> f = new LockingFibTask(20, locker, lock); |
| 359 | p.execute(f); |
| 360 | assertEquals(6765, (int) f.get()); |
| 361 | } finally { |
| 362 | p.shutdownNow(); // don't wait out shutdown |
| 363 | } |
| 364 | } |
| 365 | |
| 366 | /** |
| 367 | * pollSubmission returns unexecuted submitted task, if present |
| 368 | */ |
| 369 | public void testPollSubmission() { |
| 370 | final CountDownLatch done = new CountDownLatch(1); |
| 371 | SubFJP p = new SubFJP(); |
| 372 | try { |
| 373 | ForkJoinTask a = p.submit(awaiter(done)); |
| 374 | ForkJoinTask b = p.submit(awaiter(done)); |
| 375 | ForkJoinTask c = p.submit(awaiter(done)); |
| 376 | ForkJoinTask r = p.pollSubmission(); |
| 377 | assertTrue(r == a || r == b || r == c); |
| 378 | assertFalse(r.isDone()); |
| 379 | } finally { |
| 380 | done.countDown(); |
| 381 | joinPool(p); |
| 382 | } |
| 383 | } |
| 384 | |
| 385 | /** |
| 386 | * drainTasksTo transfers unexecuted submitted tasks, if present |
| 387 | */ |
| 388 | public void testDrainTasksTo() { |
| 389 | final CountDownLatch done = new CountDownLatch(1); |
| 390 | SubFJP p = new SubFJP(); |
| 391 | try { |
| 392 | ForkJoinTask a = p.submit(awaiter(done)); |
| 393 | ForkJoinTask b = p.submit(awaiter(done)); |
| 394 | ForkJoinTask c = p.submit(awaiter(done)); |
| 395 | ArrayList<ForkJoinTask> al = new ArrayList(); |
| 396 | p.drainTasksTo(al); |
| 397 | assertTrue(al.size() > 0); |
| 398 | for (ForkJoinTask r : al) { |
| 399 | assertTrue(r == a || r == b || r == c); |
| 400 | assertFalse(r.isDone()); |
| 401 | } |
| 402 | } finally { |
| 403 | done.countDown(); |
| 404 | joinPool(p); |
| 405 | } |
| 406 | } |
| 407 | |
| 408 | // FJ Versions of AbstractExecutorService tests |
| 409 | |
| 410 | /** |
| 411 | * execute(runnable) runs it to completion |
| 412 | */ |
| 413 | public void testExecuteRunnable() throws Throwable { |
| 414 | ExecutorService e = new ForkJoinPool(1); |
| 415 | try { |
| 416 | final AtomicBoolean done = new AtomicBoolean(false); |
| 417 | CheckedRunnable task = new CheckedRunnable() { |
| 418 | public void realRun() { |
| 419 | done.set(true); |
| 420 | }}; |
| 421 | Future<?> future = e.submit(task); |
| 422 | assertNull(future.get()); |
| 423 | assertNull(future.get(0, MILLISECONDS)); |
| 424 | assertTrue(done.get()); |
| 425 | assertTrue(future.isDone()); |
| 426 | assertFalse(future.isCancelled()); |
| 427 | } finally { |
| 428 | joinPool(e); |
| 429 | } |
| 430 | } |
| 431 | |
| 432 | /** |
| 433 | * Completed submit(callable) returns result |
| 434 | */ |
| 435 | public void testSubmitCallable() throws Throwable { |
| 436 | ExecutorService e = new ForkJoinPool(1); |
| 437 | try { |
| 438 | Future<String> future = e.submit(new StringTask()); |
| 439 | assertSame(TEST_STRING, future.get()); |
| 440 | assertTrue(future.isDone()); |
| 441 | assertFalse(future.isCancelled()); |
| 442 | } finally { |
| 443 | joinPool(e); |
| 444 | } |
| 445 | } |
| 446 | |
| 447 | /** |
| 448 | * Completed submit(runnable) returns successfully |
| 449 | */ |
| 450 | public void testSubmitRunnable() throws Throwable { |
| 451 | ExecutorService e = new ForkJoinPool(1); |
| 452 | try { |
| 453 | Future<?> future = e.submit(new NoOpRunnable()); |
| 454 | assertNull(future.get()); |
| 455 | assertTrue(future.isDone()); |
| 456 | assertFalse(future.isCancelled()); |
| 457 | } finally { |
| 458 | joinPool(e); |
| 459 | } |
| 460 | } |
| 461 | |
| 462 | /** |
| 463 | * Completed submit(runnable, result) returns result |
| 464 | */ |
| 465 | public void testSubmitRunnable2() throws Throwable { |
| 466 | ExecutorService e = new ForkJoinPool(1); |
| 467 | try { |
| 468 | Future<String> future = e.submit(new NoOpRunnable(), TEST_STRING); |
| 469 | assertSame(TEST_STRING, future.get()); |
| 470 | assertTrue(future.isDone()); |
| 471 | assertFalse(future.isCancelled()); |
| 472 | } finally { |
| 473 | joinPool(e); |
| 474 | } |
| 475 | } |
| 476 | |
| 477 | /** |
| 478 | * A submitted privileged action runs to completion |
| 479 | */ |
| 480 | public void testSubmitPrivilegedAction() throws Exception { |
| 481 | final Callable callable = Executors.callable(new PrivilegedAction() { |
| 482 | public Object run() { return TEST_STRING; }}); |
| 483 | Runnable r = new CheckedRunnable() { |
| 484 | public void realRun() throws Exception { |
| 485 | ExecutorService e = new ForkJoinPool(1); |
| 486 | try { |
| 487 | Future future = e.submit(callable); |
| 488 | assertSame(TEST_STRING, future.get()); |
| 489 | } finally { |
| 490 | joinPool(e); |
| 491 | } |
| 492 | }}; |
| 493 | |
| 494 | runWithPermissions(r, new RuntimePermission("modifyThread")); |
| 495 | } |
| 496 | |
| 497 | /** |
| 498 | * A submitted privileged exception action runs to completion |
| 499 | */ |
| 500 | public void testSubmitPrivilegedExceptionAction() throws Exception { |
| 501 | final Callable callable = |
| 502 | Executors.callable(new PrivilegedExceptionAction() { |
| 503 | public Object run() { return TEST_STRING; }}); |
| 504 | Runnable r = new CheckedRunnable() { |
| 505 | public void realRun() throws Exception { |
| 506 | ExecutorService e = new ForkJoinPool(1); |
| 507 | try { |
| 508 | Future future = e.submit(callable); |
| 509 | assertSame(TEST_STRING, future.get()); |
| 510 | } finally { |
| 511 | joinPool(e); |
| 512 | } |
| 513 | }}; |
| 514 | |
| 515 | runWithPermissions(r, new RuntimePermission("modifyThread")); |
| 516 | } |
| 517 | |
| 518 | /** |
| 519 | * A submitted failed privileged exception action reports exception |
| 520 | */ |
| 521 | public void testSubmitFailedPrivilegedExceptionAction() throws Exception { |
| 522 | final Callable callable = |
| 523 | Executors.callable(new PrivilegedExceptionAction() { |
| 524 | public Object run() { throw new IndexOutOfBoundsException(); }}); |
| 525 | Runnable r = new CheckedRunnable() { |
| 526 | public void realRun() throws Exception { |
| 527 | ExecutorService e = new ForkJoinPool(1); |
| 528 | try { |
| 529 | Future future = e.submit(callable); |
| 530 | try { |
| 531 | future.get(); |
| 532 | shouldThrow(); |
| 533 | } catch (ExecutionException success) { |
| 534 | assertTrue(success.getCause() instanceof IndexOutOfBoundsException); |
| 535 | } |
| 536 | } finally { |
| 537 | joinPool(e); |
| 538 | } |
| 539 | }}; |
| 540 | |
| 541 | runWithPermissions(r, new RuntimePermission("modifyThread")); |
| 542 | } |
| 543 | |
| 544 | /** |
| 545 | * execute(null runnable) throws NullPointerException |
| 546 | */ |
| 547 | public void testExecuteNullRunnable() { |
| 548 | ExecutorService e = new ForkJoinPool(1); |
| 549 | try { |
| 550 | Future<?> future = e.submit((Runnable) null); |
| 551 | shouldThrow(); |
| 552 | } catch (NullPointerException success) { |
| 553 | } finally { |
| 554 | joinPool(e); |
| 555 | } |
| 556 | } |
| 557 | |
| 558 | /** |
| 559 | * submit(null callable) throws NullPointerException |
| 560 | */ |
| 561 | public void testSubmitNullCallable() { |
| 562 | ExecutorService e = new ForkJoinPool(1); |
| 563 | try { |
| 564 | Future<String> future = e.submit((Callable) null); |
| 565 | shouldThrow(); |
| 566 | } catch (NullPointerException success) { |
| 567 | } finally { |
| 568 | joinPool(e); |
| 569 | } |
| 570 | } |
| 571 | |
| 572 | /** |
| 573 | * submit(callable).get() throws InterruptedException if interrupted |
| 574 | */ |
| 575 | public void testInterruptedSubmit() throws InterruptedException { |
| 576 | final CountDownLatch submitted = new CountDownLatch(1); |
| 577 | final CountDownLatch quittingTime = new CountDownLatch(1); |
| 578 | final ExecutorService p = new ForkJoinPool(1); |
| 579 | final Callable<Void> awaiter = new CheckedCallable<Void>() { |
| 580 | public Void realCall() throws InterruptedException { |
| 581 | assertTrue(quittingTime.await(MEDIUM_DELAY_MS, MILLISECONDS)); |
| 582 | return null; |
| 583 | }}; |
| 584 | try { |
| 585 | Thread t = new Thread(new CheckedInterruptedRunnable() { |
| 586 | public void realRun() throws Exception { |
| 587 | Future<Void> future = p.submit(awaiter); |
| 588 | submitted.countDown(); |
| 589 | future.get(); |
| 590 | }}); |
| 591 | t.start(); |
| 592 | assertTrue(submitted.await(MEDIUM_DELAY_MS, MILLISECONDS)); |
| 593 | t.interrupt(); |
| 594 | t.join(); |
| 595 | } finally { |
| 596 | quittingTime.countDown(); |
| 597 | joinPool(p); |
| 598 | } |
| 599 | } |
| 600 | |
| 601 | /** |
| 602 | * get of submit(callable) throws ExecutionException if callable |
| 603 | * throws exception |
| 604 | */ |
| 605 | public void testSubmitEE() throws Throwable { |
| 606 | ForkJoinPool p = new ForkJoinPool(1); |
| 607 | try { |
| 608 | p.submit(new Callable() { |
| 609 | public Object call() { throw new ArithmeticException(); }}) |
| 610 | .get(); |
| 611 | shouldThrow(); |
| 612 | } catch (ExecutionException success) { |
| 613 | assertTrue(success.getCause() instanceof ArithmeticException); |
| 614 | } finally { |
| 615 | joinPool(p); |
| 616 | } |
| 617 | } |
| 618 | |
| 619 | /** |
| 620 | * invokeAny(null) throws NullPointerException |
| 621 | */ |
| 622 | public void testInvokeAny1() throws Throwable { |
| 623 | ExecutorService e = new ForkJoinPool(1); |
| 624 | try { |
| 625 | e.invokeAny(null); |
| 626 | shouldThrow(); |
| 627 | } catch (NullPointerException success) { |
| 628 | } finally { |
| 629 | joinPool(e); |
| 630 | } |
| 631 | } |
| 632 | |
| 633 | /** |
| 634 | * invokeAny(empty collection) throws IllegalArgumentException |
| 635 | */ |
| 636 | public void testInvokeAny2() throws Throwable { |
| 637 | ExecutorService e = new ForkJoinPool(1); |
| 638 | try { |
| 639 | e.invokeAny(new ArrayList<Callable<String>>()); |
| 640 | shouldThrow(); |
| 641 | } catch (IllegalArgumentException success) { |
| 642 | } finally { |
| 643 | joinPool(e); |
| 644 | } |
| 645 | } |
| 646 | |
| 647 | /** |
| 648 | * invokeAny(c) throws NullPointerException if c has a single null element |
| 649 | */ |
| 650 | public void testInvokeAny3() throws Throwable { |
| 651 | ExecutorService e = new ForkJoinPool(1); |
| 652 | List<Callable<String>> l = new ArrayList<Callable<String>>(); |
| 653 | l.add(null); |
| 654 | try { |
| 655 | e.invokeAny(l); |
| 656 | shouldThrow(); |
| 657 | } catch (NullPointerException success) { |
| 658 | } finally { |
| 659 | joinPool(e); |
| 660 | } |
| 661 | } |
| 662 | |
| 663 | /** |
| 664 | * invokeAny(c) throws NullPointerException if c has null elements |
| 665 | */ |
| 666 | public void testInvokeAny4() throws Throwable { |
| 667 | CountDownLatch latch = new CountDownLatch(1); |
| 668 | ExecutorService e = new ForkJoinPool(1); |
| 669 | List<Callable<String>> l = new ArrayList<Callable<String>>(); |
| 670 | l.add(latchAwaitingStringTask(latch)); |
| 671 | l.add(null); |
| 672 | try { |
| 673 | e.invokeAny(l); |
| 674 | shouldThrow(); |
| 675 | } catch (NullPointerException success) { |
| 676 | } finally { |
| 677 | latch.countDown(); |
| 678 | joinPool(e); |
| 679 | } |
| 680 | } |
| 681 | |
| 682 | /** |
| 683 | * invokeAny(c) throws ExecutionException if no task in c completes |
| 684 | */ |
| 685 | public void testInvokeAny5() throws Throwable { |
| 686 | ExecutorService e = new ForkJoinPool(1); |
| 687 | List<Callable<String>> l = new ArrayList<Callable<String>>(); |
| 688 | l.add(new NPETask()); |
| 689 | try { |
| 690 | e.invokeAny(l); |
| 691 | shouldThrow(); |
| 692 | } catch (ExecutionException success) { |
| 693 | assertTrue(success.getCause() instanceof NullPointerException); |
| 694 | } finally { |
| 695 | joinPool(e); |
| 696 | } |
| 697 | } |
| 698 | |
| 699 | /** |
| 700 | * invokeAny(c) returns result of some task in c if at least one completes |
| 701 | */ |
| 702 | public void testInvokeAny6() throws Throwable { |
| 703 | ExecutorService e = new ForkJoinPool(1); |
| 704 | try { |
| 705 | List<Callable<String>> l = new ArrayList<Callable<String>>(); |
| 706 | l.add(new StringTask()); |
| 707 | l.add(new StringTask()); |
| 708 | String result = e.invokeAny(l); |
| 709 | assertSame(TEST_STRING, result); |
| 710 | } finally { |
| 711 | joinPool(e); |
| 712 | } |
| 713 | } |
| 714 | |
| 715 | /** |
| 716 | * invokeAll(null) throws NullPointerException |
| 717 | */ |
| 718 | public void testInvokeAll1() throws Throwable { |
| 719 | ExecutorService e = new ForkJoinPool(1); |
| 720 | try { |
| 721 | e.invokeAll(null); |
| 722 | shouldThrow(); |
| 723 | } catch (NullPointerException success) { |
| 724 | } finally { |
| 725 | joinPool(e); |
| 726 | } |
| 727 | } |
| 728 | |
| 729 | /** |
| 730 | * invokeAll(empty collection) returns empty collection |
| 731 | */ |
| 732 | public void testInvokeAll2() throws InterruptedException { |
| 733 | ExecutorService e = new ForkJoinPool(1); |
| 734 | try { |
| 735 | List<Future<String>> r |
| 736 | = e.invokeAll(new ArrayList<Callable<String>>()); |
| 737 | assertTrue(r.isEmpty()); |
| 738 | } finally { |
| 739 | joinPool(e); |
| 740 | } |
| 741 | } |
| 742 | |
| 743 | /** |
| 744 | * invokeAll(c) throws NullPointerException if c has null elements |
| 745 | */ |
| 746 | public void testInvokeAll3() throws InterruptedException { |
| 747 | ExecutorService e = new ForkJoinPool(1); |
| 748 | List<Callable<String>> l = new ArrayList<Callable<String>>(); |
| 749 | l.add(new StringTask()); |
| 750 | l.add(null); |
| 751 | try { |
| 752 | e.invokeAll(l); |
| 753 | shouldThrow(); |
| 754 | } catch (NullPointerException success) { |
| 755 | } finally { |
| 756 | joinPool(e); |
| 757 | } |
| 758 | } |
| 759 | |
| 760 | /** |
| 761 | * get of returned element of invokeAll(c) throws |
| 762 | * ExecutionException on failed task |
| 763 | */ |
| 764 | public void testInvokeAll4() throws Throwable { |
| 765 | ExecutorService e = new ForkJoinPool(1); |
| 766 | List<Callable<String>> l = new ArrayList<Callable<String>>(); |
| 767 | l.add(new NPETask()); |
| 768 | List<Future<String>> futures = e.invokeAll(l); |
| 769 | assertEquals(1, futures.size()); |
| 770 | try { |
| 771 | futures.get(0).get(); |
| 772 | shouldThrow(); |
| 773 | } catch (ExecutionException success) { |
| 774 | assertTrue(success.getCause() instanceof NullPointerException); |
| 775 | } finally { |
| 776 | joinPool(e); |
| 777 | } |
| 778 | } |
| 779 | |
| 780 | /** |
| 781 | * invokeAll(c) returns results of all completed tasks in c |
| 782 | */ |
| 783 | public void testInvokeAll5() throws Throwable { |
| 784 | ExecutorService e = new ForkJoinPool(1); |
| 785 | try { |
| 786 | List<Callable<String>> l = new ArrayList<Callable<String>>(); |
| 787 | l.add(new StringTask()); |
| 788 | l.add(new StringTask()); |
| 789 | List<Future<String>> futures = e.invokeAll(l); |
| 790 | assertEquals(2, futures.size()); |
| 791 | for (Future<String> future : futures) |
| 792 | assertSame(TEST_STRING, future.get()); |
| 793 | } finally { |
| 794 | joinPool(e); |
| 795 | } |
| 796 | } |
| 797 | |
| 798 | /** |
| 799 | * timed invokeAny(null) throws NullPointerException |
| 800 | */ |
| 801 | public void testTimedInvokeAny1() throws Throwable { |
| 802 | ExecutorService e = new ForkJoinPool(1); |
| 803 | try { |
| 804 | e.invokeAny(null, MEDIUM_DELAY_MS, MILLISECONDS); |
| 805 | shouldThrow(); |
| 806 | } catch (NullPointerException success) { |
| 807 | } finally { |
| 808 | joinPool(e); |
| 809 | } |
| 810 | } |
| 811 | |
| 812 | /** |
| 813 | * timed invokeAny(null time unit) throws NullPointerException |
| 814 | */ |
| 815 | public void testTimedInvokeAnyNullTimeUnit() throws Throwable { |
| 816 | ExecutorService e = new ForkJoinPool(1); |
| 817 | List<Callable<String>> l = new ArrayList<Callable<String>>(); |
| 818 | l.add(new StringTask()); |
| 819 | try { |
| 820 | e.invokeAny(l, MEDIUM_DELAY_MS, null); |
| 821 | shouldThrow(); |
| 822 | } catch (NullPointerException success) { |
| 823 | } finally { |
| 824 | joinPool(e); |
| 825 | } |
| 826 | } |
| 827 | |
| 828 | /** |
| 829 | * timed invokeAny(empty collection) throws IllegalArgumentException |
| 830 | */ |
| 831 | public void testTimedInvokeAny2() throws Throwable { |
| 832 | ExecutorService e = new ForkJoinPool(1); |
| 833 | try { |
| 834 | e.invokeAny(new ArrayList<Callable<String>>(), |
| 835 | MEDIUM_DELAY_MS, MILLISECONDS); |
| 836 | shouldThrow(); |
| 837 | } catch (IllegalArgumentException success) { |
| 838 | } finally { |
| 839 | joinPool(e); |
| 840 | } |
| 841 | } |
| 842 | |
| 843 | /** |
| 844 | * timed invokeAny(c) throws NullPointerException if c has null elements |
| 845 | */ |
| 846 | public void testTimedInvokeAny3() throws Throwable { |
| 847 | CountDownLatch latch = new CountDownLatch(1); |
| 848 | ExecutorService e = new ForkJoinPool(1); |
| 849 | List<Callable<String>> l = new ArrayList<Callable<String>>(); |
| 850 | l.add(latchAwaitingStringTask(latch)); |
| 851 | l.add(null); |
| 852 | try { |
| 853 | e.invokeAny(l, MEDIUM_DELAY_MS, MILLISECONDS); |
| 854 | shouldThrow(); |
| 855 | } catch (NullPointerException success) { |
| 856 | } finally { |
| 857 | latch.countDown(); |
| 858 | joinPool(e); |
| 859 | } |
| 860 | } |
| 861 | |
| 862 | /** |
| 863 | * timed invokeAny(c) throws ExecutionException if no task completes |
| 864 | */ |
| 865 | public void testTimedInvokeAny4() throws Throwable { |
| 866 | ExecutorService e = new ForkJoinPool(1); |
| 867 | List<Callable<String>> l = new ArrayList<Callable<String>>(); |
| 868 | l.add(new NPETask()); |
| 869 | try { |
| 870 | e.invokeAny(l, MEDIUM_DELAY_MS, MILLISECONDS); |
| 871 | shouldThrow(); |
| 872 | } catch (ExecutionException success) { |
| 873 | assertTrue(success.getCause() instanceof NullPointerException); |
| 874 | } finally { |
| 875 | joinPool(e); |
| 876 | } |
| 877 | } |
| 878 | |
| 879 | /** |
| 880 | * timed invokeAny(c) returns result of some task in c |
| 881 | */ |
| 882 | public void testTimedInvokeAny5() throws Throwable { |
| 883 | ExecutorService e = new ForkJoinPool(1); |
| 884 | try { |
| 885 | List<Callable<String>> l = new ArrayList<Callable<String>>(); |
| 886 | l.add(new StringTask()); |
| 887 | l.add(new StringTask()); |
| 888 | String result = e.invokeAny(l, MEDIUM_DELAY_MS, MILLISECONDS); |
| 889 | assertSame(TEST_STRING, result); |
| 890 | } finally { |
| 891 | joinPool(e); |
| 892 | } |
| 893 | } |
| 894 | |
| 895 | /** |
| 896 | * timed invokeAll(null) throws NullPointerException |
| 897 | */ |
| 898 | public void testTimedInvokeAll1() throws Throwable { |
| 899 | ExecutorService e = new ForkJoinPool(1); |
| 900 | try { |
| 901 | e.invokeAll(null, MEDIUM_DELAY_MS, MILLISECONDS); |
| 902 | shouldThrow(); |
| 903 | } catch (NullPointerException success) { |
| 904 | } finally { |
| 905 | joinPool(e); |
| 906 | } |
| 907 | } |
| 908 | |
| 909 | /** |
| 910 | * timed invokeAll(null time unit) throws NullPointerException |
| 911 | */ |
| 912 | public void testTimedInvokeAllNullTimeUnit() throws Throwable { |
| 913 | ExecutorService e = new ForkJoinPool(1); |
| 914 | List<Callable<String>> l = new ArrayList<Callable<String>>(); |
| 915 | l.add(new StringTask()); |
| 916 | try { |
| 917 | e.invokeAll(l, MEDIUM_DELAY_MS, null); |
| 918 | shouldThrow(); |
| 919 | } catch (NullPointerException success) { |
| 920 | } finally { |
| 921 | joinPool(e); |
| 922 | } |
| 923 | } |
| 924 | |
| 925 | /** |
| 926 | * timed invokeAll(empty collection) returns empty collection |
| 927 | */ |
| 928 | public void testTimedInvokeAll2() throws InterruptedException { |
| 929 | ExecutorService e = new ForkJoinPool(1); |
| 930 | try { |
| 931 | List<Future<String>> r |
| 932 | = e.invokeAll(new ArrayList<Callable<String>>(), |
| 933 | MEDIUM_DELAY_MS, MILLISECONDS); |
| 934 | assertTrue(r.isEmpty()); |
| 935 | } finally { |
| 936 | joinPool(e); |
| 937 | } |
| 938 | } |
| 939 | |
| 940 | /** |
| 941 | * timed invokeAll(c) throws NullPointerException if c has null elements |
| 942 | */ |
| 943 | public void testTimedInvokeAll3() throws InterruptedException { |
| 944 | ExecutorService e = new ForkJoinPool(1); |
| 945 | List<Callable<String>> l = new ArrayList<Callable<String>>(); |
| 946 | l.add(new StringTask()); |
| 947 | l.add(null); |
| 948 | try { |
| 949 | e.invokeAll(l, MEDIUM_DELAY_MS, MILLISECONDS); |
| 950 | shouldThrow(); |
| 951 | } catch (NullPointerException success) { |
| 952 | } finally { |
| 953 | joinPool(e); |
| 954 | } |
| 955 | } |
| 956 | |
| 957 | /** |
| 958 | * get of returned element of invokeAll(c) throws exception on failed task |
| 959 | */ |
| 960 | public void testTimedInvokeAll4() throws Throwable { |
| 961 | ExecutorService e = new ForkJoinPool(1); |
| 962 | List<Callable<String>> l = new ArrayList<Callable<String>>(); |
| 963 | l.add(new NPETask()); |
| 964 | List<Future<String>> futures |
| 965 | = e.invokeAll(l, MEDIUM_DELAY_MS, MILLISECONDS); |
| 966 | assertEquals(1, futures.size()); |
| 967 | try { |
| 968 | futures.get(0).get(); |
| 969 | shouldThrow(); |
| 970 | } catch (ExecutionException success) { |
| 971 | assertTrue(success.getCause() instanceof NullPointerException); |
| 972 | } finally { |
| 973 | joinPool(e); |
| 974 | } |
| 975 | } |
| 976 | |
| 977 | /** |
| 978 | * timed invokeAll(c) returns results of all completed tasks in c |
| 979 | */ |
| 980 | public void testTimedInvokeAll5() throws Throwable { |
| 981 | ExecutorService e = new ForkJoinPool(1); |
| 982 | try { |
| 983 | List<Callable<String>> l = new ArrayList<Callable<String>>(); |
| 984 | l.add(new StringTask()); |
| 985 | l.add(new StringTask()); |
| 986 | List<Future<String>> futures |
| 987 | = e.invokeAll(l, MEDIUM_DELAY_MS, MILLISECONDS); |
| 988 | assertEquals(2, futures.size()); |
| 989 | for (Future<String> future : futures) |
| 990 | assertSame(TEST_STRING, future.get()); |
| 991 | } finally { |
| 992 | joinPool(e); |
| 993 | } |
| 994 | } |
| 995 | |
| 996 | } |