Esempio n. 1
0
  /**
   * After invoking a single task, isQuiescent eventually becomes true, at which time queues are
   * empty, threads are not active, the task has completed successfully, and construction parameters
   * continue to hold
   */
  public void testIsQuiescent() throws Exception {
    ForkJoinPool p = new ForkJoinPool(2);
    try (PoolCleaner cleaner = cleaner(p)) {
      assertTrue(p.isQuiescent());
      long startTime = System.nanoTime();
      FibTask f = new FibTask(20);
      p.invoke(f);
      assertSame(ForkJoinPool.defaultForkJoinWorkerThreadFactory, p.getFactory());
      while (!p.isQuiescent()) {
        if (millisElapsedSince(startTime) > LONG_DELAY_MS)
          throw new AssertionFailedError("timed out");
        assertFalse(p.getAsyncMode());
        assertFalse(p.isShutdown());
        assertFalse(p.isTerminating());
        assertFalse(p.isTerminated());
        Thread.yield();
      }

      assertTrue(p.isQuiescent());
      assertFalse(p.getAsyncMode());
      assertEquals(0, p.getQueuedTaskCount());
      assertEquals(0, p.getQueuedSubmissionCount());
      assertFalse(p.hasQueuedSubmissions());
      while (p.getActiveThreadCount() != 0 && millisElapsedSince(startTime) < LONG_DELAY_MS)
        Thread.yield();
      assertFalse(p.isShutdown());
      assertFalse(p.isTerminating());
      assertFalse(p.isTerminated());
      assertTrue(f.isDone());
      assertEquals(6765, (int) f.get());
      assertTrue(millisElapsedSince(startTime) < LONG_DELAY_MS);
    }
  }
Esempio n. 2
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 /**
  * Successfully constructed pool reports default factory, parallelism and async mode policies, no
  * active threads or tasks, and quiescent running state.
  */
 public void testDefaultInitialState() {
   ForkJoinPool p = new ForkJoinPool(1);
   try (PoolCleaner cleaner = cleaner(p)) {
     assertSame(ForkJoinPool.defaultForkJoinWorkerThreadFactory, p.getFactory());
     assertFalse(p.getAsyncMode());
     assertEquals(0, p.getActiveThreadCount());
     assertEquals(0, p.getStealCount());
     assertEquals(0, p.getQueuedTaskCount());
     assertEquals(0, p.getQueuedSubmissionCount());
     assertFalse(p.hasQueuedSubmissions());
     assertFalse(p.isShutdown());
     assertFalse(p.isTerminating());
     assertFalse(p.isTerminated());
   }
 }
Esempio n. 3
0
 // 16、实现showLog()方法,接受一个ForkJoinPool对象作为参数,输出关于它的状态信息及线程、任务的执行信息
 private static void showLog(ForkJoinPool pool) {
   System.out.printf("**********************\n");
   System.out.printf("Main: Fork/Join Pool log\n");
   System.out.printf("Main: Fork/Join Pool: Parallelism: %d\n", pool.getParallelism());
   System.out.printf("Main: Fork/Join Pool: Pool Size: %d\n", pool.getPoolSize());
   System.out.printf(
       "Main: Fork/Join Pool: Active Thread Count: %d\n", pool.getActiveThreadCount());
   System.out.printf(
       "Main: Fork/Join Pool: Running Thread Count: %d\n", pool.getRunningThreadCount());
   System.out.printf(
       "Main: Fork/Join Pool: Queued Submission: %d\n", pool.getQueuedSubmissionCount());
   System.out.printf("Main: Fork/Join Pool: Queued Tasks: %d\n", pool.getQueuedTaskCount());
   System.out.printf(
       "Main: Fork/Join Pool: Queued Submissions: %s\n", pool.hasQueuedSubmissions());
   System.out.printf("Main: Fork/Join Pool: Steal Count: %d\n", pool.getStealCount());
   System.out.printf("Main: Fork/Join Pool: Terminated : %s\n", pool.isTerminated());
   System.out.printf("**********************\n");
 }