Examples of com.hazelcast.core.IQueue

com.hazelcast.core.IQueue
Concurrent, blocking, distributed, observable queue. @see BaseQueue @see java.util.Queue @see BlockingQueue @see TransactionalQueue @param < E>

        assertEquals(2, q.size());
    }


    @Test
    public void testSize() throws IOException {
        final IQueue q = getQueue();
        q.offer("item1");
        q.offer("item2");
        q.offer("item3");


        final SimpleClient client = getClient();
        client.send(new SizeRequest(queueName));
        int result = (Integer) client.receive();
        assertEquals(result, q.size());
    }

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        assertEquals(result, q.size());
    }


    @Test
    public void testIsEmpty() throws IOException {
        final IQueue queue = getQueue();


        final SimpleClient client = getClient();
        client.send(new IsEmptyRequest(queueName));
        boolean result = (Boolean) client.receive();
        assertEquals(0, queue.size());
        assertTrue(result);
    }

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    }


    @Test
    public void testRemainingCapacity() throws IOException {
        createConfig();
        IQueue queue = getQueue();
        queue.offer("item1");
        queue.offer("item2");


        final SimpleClient client = getClient();
        client.send(new RemainingCapacityRequest(queueName));
        int result = (Integer) client.receive();
        assertEquals(4, result);

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        assertEquals(4, result);
    }


    @Test
    public void testRemoveListener() throws IOException {
        IQueue queue = getQueue();
        final AtomicInteger addCounter = new AtomicInteger(0);
        TestListener listener = new TestListener(addCounter);
        String registrationId = queue.addItemListener(listener, false);
        queue.add("item1");
        queue.add("item2");
        assertTrueEventually(new AssertTask() {
            @Override
            public void run() throws Exception {
                assertEquals(2, addCounter.get());
            }
        });


        final SimpleClient client = getClient();
        client.send(new RemoveListenerRequest(queueName, registrationId));
        boolean result = (Boolean) client.receive();


        assertTrue(result);
        queue.offer("item3");
        assertSizeEventually(3, queue);
        assertNotEquals(3, addCounter.get());
    }

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    public void testListenerLifecycle() throws Exception {
        final HazelcastInstance instance = createHazelcastInstance();
        // IQueue
        final long sleep = 2000;
        final String name = "listenerLifecycle";
        IQueue q = instance.getQueue(name);
        final CountDownLatch qLatch = new CountDownLatch(3);
        final ItemListener ql = new ItemListener() {
            public void itemAdded(ItemEvent itemEvent) {
                qLatch.countDown();
            }


            public void itemRemoved(ItemEvent itemEvent) {
            }
        };
        q.addItemListener(ql, false);
        q.offer(1);
        Thread.sleep(sleep);
        q.destroy();
        q = instance.getQueue(name);
        String id = q.addItemListener(ql, false);
        q.offer(2);
        Thread.sleep(sleep);
        q.removeItemListener(id);
        q.offer(3);
        Thread.sleep(sleep);
        assertEquals(1, qLatch.getCount());
        qLatch.countDown();
        assertTrue("Remaining:" + qLatch.getCount(), qLatch.await(3, TimeUnit.SECONDS));
        q.destroy();
    }

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     */
    @Test
    public void issue99TestQueueTakeAndDuringRollback() throws InterruptedException {
        final HazelcastInstance hz = createHazelcastInstance();
        final String name = "issue99TestQueueTakeAndDuringRollback";
        final IQueue q = hz.getQueue(name);
        q.offer("item");


        Thread t1 = new Thread() {
            public void run() {
                final TransactionContext context = hz.newTransactionContext();
                try {

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     */
    @Test
    public void issue114TestQueueListenersUnderTransaction() throws InterruptedException {
        final HazelcastInstance hz = createHazelcastInstance();
        final String name = "issue99TestQueueTakeAndDuringRollback";
        final IQueue testQueue = hz.getQueue(name);


        final CountDownLatch offerLatch = new CountDownLatch(2);
        final CountDownLatch pollLatch = new CountDownLatch(2);
        testQueue.addItemListener(new ItemListener<String>() {
            public void itemAdded(ItemEvent<String> item) {
                offerLatch.countDown();
            }


            public void itemRemoved(ItemEvent<String> item) {

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