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

Example 51 with ConcurrentLinkedQueue

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

the class ConcurrentLinkedQueueTest method testPeek.

/**
     * peek returns next element, or null if empty
     */
public void testPeek() {
    ConcurrentLinkedQueue q = populatedQueue(SIZE);
    for (int i = 0; i < SIZE; ++i) {
        assertEquals(i, q.peek());
        assertEquals(i, q.poll());
        assertTrue(q.peek() == null || !q.peek().equals(i));
    }
    assertNull(q.peek());
}

Example 52 with ConcurrentLinkedQueue

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

the class ConcurrentLinkedQueueTest method testToArray.

/**
     * toArray contains all elements in FIFO order
     */
public void testToArray() {
    ConcurrentLinkedQueue q = populatedQueue(SIZE);
    Object[] o = q.toArray();
    for (int i = 0; i < o.length; i++) assertSame(o[i], q.poll());
}

Example 53 with ConcurrentLinkedQueue

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

the class ConcurrentLinkedQueueTest method testRemoveElement.

/**
     * remove(x) removes x and returns true if present
     */
public void testRemoveElement() {
    ConcurrentLinkedQueue q = populatedQueue(SIZE);
    for (int i = 1; i < SIZE; i += 2) {
        assertTrue(q.contains(i));
        assertTrue(q.remove(i));
        assertFalse(q.contains(i));
        assertTrue(q.contains(i - 1));
    }
    for (int i = 0; i < SIZE; i += 2) {
        assertTrue(q.contains(i));
        assertTrue(q.remove(i));
        assertFalse(q.contains(i));
        assertFalse(q.remove(i + 1));
        assertFalse(q.contains(i + 1));
    }
    assertTrue(q.isEmpty());
}

Example 54 with ConcurrentLinkedQueue

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

the class ConcurrentLinkedQueueTest method testRemove.

/**
     * remove removes next element, or throws NSEE if empty
     */
public void testRemove() {
    ConcurrentLinkedQueue q = populatedQueue(SIZE);
    for (int i = 0; i < SIZE; ++i) {
        assertEquals(i, q.remove());
    }
    try {
        q.remove();
        shouldThrow();
    } catch (NoSuchElementException success) {
    }
}

Example 55 with ConcurrentLinkedQueue

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

the class ConcurrentLinkedQueueTest method testIterator.

/**
     * iterator iterates through all elements
     */
public void testIterator() {
    ConcurrentLinkedQueue q = populatedQueue(SIZE);
    Iterator it = q.iterator();
    int i;
    for (i = 0; it.hasNext(); i++) assertTrue(q.contains(it.next()));
    assertEquals(i, SIZE);
    assertIteratorExhausted(it);
}