RabbitMQ delayed message plugin - How to show delayed message in admin UI? - rabbitmq

Question

We use the rabbitmq message delay plugin (rabbitmq_delayed_message_exchange) for delaying messages. Is it possible for debugging and monitoring purposes, to show holded / delayed messages in rabbitmq admin web interface?
Link: https://github.com/rabbitmq/rabbitmq-delayed-message-exchange/
Bye,
Ben

Answer 1

No; delayed messages are not visible in the admin UI.
As an alternative you can route the messages to a real queue, with a TTL defined as well as dead lettering which will cause expired message to be routed to the final queue.
You can set a fixed TTL on the temporary queue or use the expiration property on individual messages.
EDIT
#SpringBootApplication
public class So50760600Application {
public static void main(String[] args) {
SpringApplication.run(So50760600Application.class, args);
}
#Bean
public ApplicationRunner runner(RabbitTemplate template) {
return args -> template.convertAndSend("", "temp", "foo", m -> {
m.getMessageProperties().setExpiration("5000");
return m;
});
}
#RabbitListener(queues = "final")
public void in(String in, #Header("x-death") List<?> death) {
System.out.println(in + ", x-death:" + death);
}
#Bean
public Queue temp() {
Map<String, Object> args = new HashMap<>();
args.put("x-message-ttl", 10000); // default (max)
args.put("x-dead-letter-exchange", "");
args.put("x-dead-letter-routing-key", "final");
return new Queue("temp", true, false, false, args);
}
#Bean
public Queue finalQ() {
return new Queue("final");
}
}
and
foo:[{reason=expired, original-expiration=5000, count=1, exchange=, time=Fri Jun 08 10:43:42 EDT 2018, routing-keys=[temp], queue=temp}]