Examples with LinkedBlockingDeque java.util.concurrent.LinkedBlockingDeque used on opensource projects

Example 86 with LinkedBlockingDeque

use of java.util.concurrent.LinkedBlockingDeque in project mapdb by jankotek.

the class LinkedBlockingDequeTest method testTakeFirstFromEmptyBlocksInterruptibly.

/**
     * takeFirst() blocks interruptibly when empty
     */
public void testTakeFirstFromEmptyBlocksInterruptibly() {
    final BlockingDeque q = new LinkedBlockingDeque();
    final CountDownLatch threadStarted = new CountDownLatch(1);
    Thread t = newStartedThread(new CheckedRunnable() {

        public void realRun() {
            threadStarted.countDown();
            try {
                q.takeFirst();
                shouldThrow();
            } catch (InterruptedException success) {
            }
            assertFalse(Thread.interrupted());
        }
    });
    await(threadStarted);
    assertThreadStaysAlive(t);
    t.interrupt();
    awaitTermination(t);
}

Example 87 with LinkedBlockingDeque

use of java.util.concurrent.LinkedBlockingDeque in project mapdb by jankotek.

the class LinkedBlockingDequeTest method testDescendingIteratorOrdering.

/**
     * Descending iterator ordering is reverse FIFO
     */
public void testDescendingIteratorOrdering() {
    final LinkedBlockingDeque q = new LinkedBlockingDeque();
    for (int iters = 0; iters < 100; ++iters) {
        q.add(new Integer(3));
        q.add(new Integer(2));
        q.add(new Integer(1));
        int k = 0;
        for (Iterator it = q.descendingIterator(); it.hasNext(); ) {
            assertEquals(++k, it.next());
        }
        assertEquals(3, k);
        q.remove();
        q.remove();
        q.remove();
    }
}

Example 88 with LinkedBlockingDeque

use of java.util.concurrent.LinkedBlockingDeque in project mapdb by jankotek.

the class LinkedBlockingDequeTest method testPushNull.

/**
     * push(null) throws NPE
     */
public void testPushNull() {
    LinkedBlockingDeque q = new LinkedBlockingDeque(1);
    try {
        q.push(null);
        shouldThrow();
    } catch (NullPointerException success) {
    }
}

Example 89 with LinkedBlockingDeque

use of java.util.concurrent.LinkedBlockingDeque in project mapdb by jankotek.

the class LinkedBlockingDequeTest method testAddLast.

/**
     * peekLast returns element inserted with addLast
     */
public void testAddLast() {
    LinkedBlockingDeque q = populatedDeque(3);
    q.pollLast();
    q.addLast(four);
    assertSame(four, q.peekLast());
}

Example 90 with LinkedBlockingDeque

use of java.util.concurrent.LinkedBlockingDeque in project mapdb by jankotek.

the class LinkedBlockingDequeTest method testRemoveFirst.

/**
     * removeFirst() removes first element, or throws NSEE if empty
     */
public void testRemoveFirst() {
    LinkedBlockingDeque q = populatedDeque(SIZE);
    for (int i = 0; i < SIZE; ++i) {
        assertEquals(i, q.removeFirst());
    }
    try {
        q.removeFirst();
        shouldThrow();
    } catch (NoSuchElementException success) {
    }
    assertNull(q.peekFirst());
}