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

Example 31 with LinkedBlockingDeque

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

the class LinkedBlockingDequeTest method testPutFirstNull.

/**
     * putFirst(null) throws NPE
     */
public void testPutFirstNull() throws InterruptedException {
    LinkedBlockingDeque q = new LinkedBlockingDeque(SIZE);
    try {
        q.putFirst(null);
        shouldThrow();
    } catch (NullPointerException success) {
    }
}

Example 32 with LinkedBlockingDeque

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

the class LinkedBlockingDequeTest method testPutWithTake.

/**
     * put blocks interruptibly waiting for take when full
     */
public void testPutWithTake() throws InterruptedException {
    final int capacity = 2;
    final LinkedBlockingDeque q = new LinkedBlockingDeque(capacity);
    final CountDownLatch pleaseTake = new CountDownLatch(1);
    final CountDownLatch pleaseInterrupt = new CountDownLatch(1);
    Thread t = newStartedThread(new CheckedRunnable() {

        public void realRun() throws InterruptedException {
            for (int i = 0; i < capacity; i++) q.put(i);
            pleaseTake.countDown();
            q.put(86);
            pleaseInterrupt.countDown();
            try {
                q.put(99);
                shouldThrow();
            } catch (InterruptedException success) {
            }
            assertFalse(Thread.interrupted());
        }
    });
    await(pleaseTake);
    assertEquals(0, q.remainingCapacity());
    assertEquals(0, q.take());
    await(pleaseInterrupt);
    assertThreadStaysAlive(t);
    t.interrupt();
    awaitTermination(t);
    assertEquals(0, q.remainingCapacity());
}

Example 33 with LinkedBlockingDeque

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

the class LinkedBlockingDequeTest method testEmptyFull.

/**
     * Deque transitions from empty to full when elements added
     */
public void testEmptyFull() {
    LinkedBlockingDeque q = new LinkedBlockingDeque(2);
    assertTrue(q.isEmpty());
    assertEquals("should have room for 2", 2, q.remainingCapacity());
    q.add(one);
    assertFalse(q.isEmpty());
    q.add(two);
    assertFalse(q.isEmpty());
    assertEquals(0, q.remainingCapacity());
    assertFalse(q.offer(three));
}

Example 34 with LinkedBlockingDeque

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

the class LinkedBlockingDequeTest method testTakeFirstFromEmptyAfterInterrupt.

/**
     * takeFirst() throws InterruptedException immediately if interrupted
     * before waiting
     */
public void testTakeFirstFromEmptyAfterInterrupt() {
    final BlockingDeque q = new LinkedBlockingDeque();
    Thread t = newStartedThread(new CheckedRunnable() {

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

Example 35 with LinkedBlockingDeque

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

the class LinkedBlockingDequeTest method testTimedPollLast0.

/**
     * timed pollLast with zero timeout succeeds when non-empty, else times out
     */
public void testTimedPollLast0() throws InterruptedException {
    LinkedBlockingDeque q = populatedDeque(SIZE);
    for (int i = 0; i < SIZE; ++i) {
        assertEquals(SIZE - i - 1, q.pollLast(0, MILLISECONDS));
    }
    assertNull(q.pollLast(0, MILLISECONDS));
}