Issues reading events from RabbitMQ queue on Axon 3.3.5

Question

Using Axon 3.3.5, I am trying to read events from an AMQP queue.

/**
 * AMQP subscribing
 */

@Bean
SpringAMQPMessageSource notificationsEventsQueue(Serializer serializer) {
    return new SpringAMQPMessageSource(serializer) {

        @Override
        @Transactional
        @RabbitListener(id = "eventsQueue", queues = "notificationsEventsQueue")
        public void onMessage(Message message, Channel channel) {
            super.onMessage(message, channel);
        }

    };
}

@Autowired
public void configure(EventProcessingConfiguration conf, SpringAMQPMessageSource src) {
    conf.registerSubscribingEventProcessor("notificationsServiceEventProcessor", c -> src);
}

I debugged the onMessage method and when a new message comes in, the eventProcessors list is always empty, so the message isn't processed by my application.

What am I missing out?

Do you assign any of your event handlers to the notificationsServiceEventProcessor’ group? — Allard, Sep 11 '18 at 23:53
The easiest way is to put `@ProcessingGroup(“notificationsServiceEventProcessor”)` on your event handler class. Check out the ref guide for more info (docs.axonframework.org) — Allard, Sep 13 '18 at 15:06
Thanks, Allard, that was right! Can you post this as an answer so I can accept it? — Marcos J.C Kichel, Sep 17 '18 at 16:34

score 2 · Accepted Answer · edited May 21 '20 at 08:32

2

Event Handlers receive their events from the Event Bus by default. If you want handlers to receive events from another source (such as RabbitMQ), you need to explicitly assign that source to a processor, and assign that handler to that processor as well. The easiest way is to put @ProcessingGroup('notificationsServiceEventProcessor') on the eventhandler class.

edited May 21 '20 at 08:32

Saikat

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answered Sep 23 '18 at 18:39

Allard

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Issues reading events from RabbitMQ queue on Axon 3.3.5

1 Answers1