Examples with ForkJoinPool java8.util.concurrent.ForkJoinPool used on opensource projects

Example 61 with ForkJoinPool

use of java8.util.concurrent.ForkJoinPool in project streamsupport by stefan-zobel.

the class ForkJoinPoolTest method testIsQuiescent.

/**
 * 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);
    PoolCleaner cleaner = null;
    try {
        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 AssertionError("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);
    } finally {
        if (cleaner != null) {
            cleaner.close();
        }
    }
}

Example 62 with ForkJoinPool

use of java8.util.concurrent.ForkJoinPool in project streamsupport by stefan-zobel.

the class ForkJoinPoolTest method testInvokeAny4.

/**
 * invokeAny(c) throws NullPointerException if c has null elements
 */
public void testInvokeAny4() throws Throwable {
    CountDownLatch latch = new CountDownLatch(1);
    ExecutorService e = new ForkJoinPool(1);
    PoolCleaner cleaner = null;
    try {
        cleaner = cleaner(e);
        List<Callable<String>> l = new ArrayList<>();
        l.add(latchAwaitingStringTask(latch));
        l.add(null);
        try {
            e.invokeAny(l);
            shouldThrow();
        } catch (NullPointerException success) {
        }
        latch.countDown();
    } finally {
        if (cleaner != null) {
            cleaner.close();
        }
    }
}

Example 63 with ForkJoinPool

use of java8.util.concurrent.ForkJoinPool in project streamsupport by stefan-zobel.

the class ForkJoinPoolTest method testGetPoolSize.

/**
 * getPoolSize returns number of started workers.
 */
public void testGetPoolSize() {
    final CountDownLatch taskStarted = new CountDownLatch(1);
    final CountDownLatch done = new CountDownLatch(1);
    final ForkJoinPool p = new ForkJoinPool(1);
    PoolCleaner cleaner = null;
    try {
        cleaner = cleaner(p);
        assertEquals(0, p.getActiveThreadCount());
        final Runnable task = new CheckedRunnable() {

            public void realRun() throws InterruptedException {
                taskStarted.countDown();
                assertEquals(1, p.getPoolSize());
                assertEquals(1, p.getActiveThreadCount());
                await(done);
            }
        };
        @SuppressWarnings("unused") Future<?> future = p.submit(task);
        await(taskStarted);
        assertEquals(1, p.getPoolSize());
        assertEquals(1, p.getActiveThreadCount());
        done.countDown();
    } finally {
        if (cleaner != null) {
            cleaner.close();
        }
    }
    assertEquals(0, p.getPoolSize());
    assertEquals(0, p.getActiveThreadCount());
}

Example 64 with ForkJoinPool

use of java8.util.concurrent.ForkJoinPool in project streamsupport by stefan-zobel.

the class ForkJoinTask8Test method testAbnormalForkJoin.

private void testAbnormalForkJoin(ForkJoinPool pool) {
    @SuppressWarnings("serial") RecursiveAction a = new CheckedRecursiveAction() {

        protected void realCompute() {
            FailingAsyncFib f = new FailingAsyncFib(8);
            assertSame(f, f.fork());
            try {
                f.join();
                shouldThrow();
            } catch (FJException success) {
                checkCompletedAbnormally(f, success);
            }
        }
    };
    testInvokeOnPool(pool, a);
}

Example 65 with ForkJoinPool

use of java8.util.concurrent.ForkJoinPool in project streamsupport by stefan-zobel.

the class ForkJoinTask8Test method testAbnormalInvokeAll2.

private void testAbnormalInvokeAll2(ForkJoinPool pool) {
    @SuppressWarnings("serial") RecursiveAction a = new CheckedRecursiveAction() {

        protected void realCompute() {
            AsyncFib f = new AsyncFib(8);
            FailingAsyncFib g = new FailingAsyncFib(9);
            ForkJoinTask<?>[] tasks = { f, g };
            shuffle(tasks);
            try {
                invokeAll(tasks[0], tasks[1]);
                shouldThrow();
            } catch (FJException success) {
                checkCompletedAbnormally(g, success);
            }
        }
    };
    testInvokeOnPool(pool, a);
}