Spring AMQP RabbitMQ RPC - Handle response exceptions

Question

I am trying to use a RPC AMQP RabbitMQ queue to send and receive messages. The problem is that I have set a setReplyTimeout value. When that happens I get a "org.springframework.amqp.AmqpRejectAndDontRequeueException: Reply received after timeout". I have a DLQ set up on the incoming queue, but it appears that the exception is received when spring tries to return the message on its queue that is automatically created. Thus how can I handle exceptions when sending messages back to a producer? Ideally I would want any message that gets an exception while being sent to a producer sent to a DLQ.

I am using

@RabbitListener(queues = QueueConfig.QUEUE_ALL, containerFactory = "containerFactoryQueueAll")

It requires a SimpleRabbitListenerContainerFactory which does not have setQueues. Also rabbitTemplate does not have a rabbitTemplate.setReplyQueue

Thanks, Brian

Answer 1

Instead of using the default built-in reply listener container with the direct reply-to pseudo queue, use a Reply Listener Container with a named queue that is configured to route undeliverable messages to a DLQ.

The RabbitTemplate is configured as the container's listener:

@Bean
public RabbitTemplate amqpTemplate() {
    RabbitTemplate rabbitTemplate = new RabbitTemplate(connectionFactory());
    rabbitTemplate.setMessageConverter(msgConv());
    rabbitTemplate.setReplyQueue(replyQueue());
    rabbitTemplate.setReplyTimeout(60000);
    rabbitTemplate.setUseDirectReplyToContainer(false);
    return rabbitTemplate;
}

@Bean
public SimpleMessageListenerContainer replyListenerContainer() {
    SimpleMessageListenerContainer container = new SimpleMessageListenerContainer();
    container.setConnectionFactory(connectionFactory());
    container.setQueues(replyQueue());
    container.setMessageListener(amqpTemplate());
    return container;
}

@Bean
public Queue replyQueue() {
    return new Queue("my.reply.queue");
}

Note that the documentation needs to be updated, but you also need

rabbitTemplate.setUseDirectReplyToContainer(false);

IMPORTANT

If you have multiple instances of the client, each needs its own reply queue.