Examples with QueueingConsumer com.rabbitmq.client.QueueingConsumer used on opensource projects

Example 26 with QueueingConsumer

use of com.rabbitmq.client.QueueingConsumer in project microservices by pwillhan.

the class PublishSubscribeReceiver method receive.

public String receive(String queue) {
    if (channel == null) {
        initialize();
    }
    String message = null;
    try {
        channel.exchangeDeclare(EXCHANGE_NAME, "fanout");
        channel.queueDeclare(queue, false, false, false, null);
        channel.queueBind(queue, EXCHANGE_NAME, "");
        QueueingConsumer consumer = new QueueingConsumer(channel);
        channel.basicConsume(queue, true, consumer);
        QueueingConsumer.Delivery delivery = consumer.nextDelivery();
        message = new String(delivery.getBody());
        LOGGER.info("Message received: " + message);
        return message;
    } catch (IOException e) {
        LOGGER.error(e.getMessage(), e);
    } catch (ShutdownSignalException e) {
        LOGGER.error(e.getMessage(), e);
    } catch (ConsumerCancelledException e) {
        LOGGER.error(e.getMessage(), e);
    } catch (InterruptedException e) {
        LOGGER.error(e.getMessage(), e);
    }
    return message;
}

Example 27 with QueueingConsumer

use of com.rabbitmq.client.QueueingConsumer in project rabbitmq-java-client by rabbitmq.

the class RequeueOnClose method publishLotsAndGet.

private void publishLotsAndGet() throws IOException, InterruptedException, ShutdownSignalException, TimeoutException {
    openConnection();
    open();
    channel.queueDeclare(Q, false, false, false, null);
    channel.queueDelete(Q);
    channel.queueDeclare(Q, false, false, false, null);
    for (int i = 0; i < MESSAGE_COUNT; i++) {
        channel.basicPublish("", Q, null, "in flight message".getBytes());
    }
    QueueingConsumer c = new QueueingConsumer(channel);
    channel.basicConsume(Q, c);
    c.nextDelivery();
    close();
    open();
    for (int i = 0; i < MESSAGE_COUNT; i++) {
        assertNotNull("only got " + i + " out of " + MESSAGE_COUNT + " messages", channel.basicGet(Q, true));
    }
    assertNull("got more messages than " + MESSAGE_COUNT + " expected", channel.basicGet(Q, true));
    channel.queueDelete(Q);
    close();
    closeConnection();
}

Example 28 with QueueingConsumer

use of com.rabbitmq.client.QueueingConsumer in project rabbitmq-java-client by rabbitmq.

the class RequeueOnClose method requeueingConsumer.

/**
 * Test we requeue unacknowledged message (using consumer)
 * @throws Exception untested
 */
@Test
public void requeueingConsumer() throws Exception {
    openConnection();
    open();
    injectMessage();
    QueueingConsumer c = new QueueingConsumer(channel);
    channel.basicConsume(Q, c);
    c.nextDelivery();
    close();
    open();
    assertNotNull(getMessage());
    close();
    closeConnection();
}

Example 29 with QueueingConsumer

use of com.rabbitmq.client.QueueingConsumer in project rabbitmq-java-client by rabbitmq.

the class TTLHandling method expiryWithReQueueAfterConsume.

/*
    * Test expiry of re-queued messages after being consumed instantly
    */
@Test
public void expiryWithReQueueAfterConsume() throws Exception {
    declareAndBindQueue(100);
    QueueingConsumer c = new QueueingConsumer(channel);
    channel.basicConsume(TTL_QUEUE_NAME, c);
    publish(MSG[0]);
    assertNotNull(c.nextDelivery(100));
    closeChannel();
    Thread.sleep(150);
    openChannel();
    assertNull("Re-queued message not expired", get());
}

Example 30 with QueueingConsumer

use of com.rabbitmq.client.QueueingConsumer in project rabbitmq-java-client by rabbitmq.

the class TTLHandling method zeroTTLDelivery.

@Test
public void zeroTTLDelivery() throws Exception {
    declareAndBindQueue(0);
    // when there is no consumer, message should expire
    publish(MSG[0]);
    assertNull(get());
    // when there is a consumer, message should be delivered
    QueueingConsumer c = new QueueingConsumer(channel);
    channel.basicConsume(TTL_QUEUE_NAME, c);
    publish(MSG[0]);
    QueueingConsumer.Delivery d = c.nextDelivery(100);
    assertNotNull(d);
    // requeued messages should expire
    channel.basicReject(d.getEnvelope().getDeliveryTag(), true);
    assertNull(c.nextDelivery(100));
}