Multiple Listeners for different queues - Spring Rabbit

Question

I have multiple modules which communicate each other by mean of a message queue (Spring Rabbit). Some modules produce messages and others consume them. However, a single module can listen different queues, I have a list of queue names in a list, so I created a SimpleMessageListenerContainer for each queue name as follow.

public void build() {
    for (String queueName: queues) {
        SimpleMessageListenerContainer listenerContainer = new SimpleMessageListenerContainer();
        listenerContainer.setConnectionFactory(connectionFactory());
        listenerContainer.setQueueNames(queueName);
        listenerContainer.setMessageListener(listenerAdapter());
    }
}

@Bean
private MessageListenerAdapter listenerAdapter() {
    return new MessageListenerAdapter(new MessageListener() {
        @Override
        public void onMessage(Message message) {
            System.out.println(message.getBody());
        }
    }, "onMessage");
}

This implementation is not working for me, consumer are not registered in the queue and any error or exception is throwing during execution.

Note: I am using Spring and I am limited to not use annotations such as @RabbitListener

Answer 1

When you declare SimpleMessageListenerContainer manually, not as beans, you have also to ensure application context callbacks and lifecycle:

listenerContainer.setApplicationContext()
listenerContainer.setApplicationEventPublisher()
listenerContainer.afterPropertiesSet()
listenerContainer.start()

And don't forget to stop() and destroy() them in the end of application.