@Override
			public void handleMessage(Message<?> message) throws MessagingException {
				if (latch0.getCount() <= 0) {
					throw new RuntimeException("dlq");
				}
				latch0.countDown();
			}
@author Mark Fisher
@author Gary Russell
spring-xd-dirt/src/test/java/org/springframework/xd/dirt/integration/bus/rabbit/RabbitMessageBusTests.java