SpringAMQP delay

Question

I'm having trouble to identify a way to delay message level in SpringAMQP. I call a Webservice if the service is not available or if it throws some exception I store all the requests into RabbitMQ queue and i keep retry the service call until it executes successfully. If the service keeps throwing an error or its not available the rabbitMQ listener keeps looping.( Meaning Listener retrieves the message and make service call if any error it re-queue the message)

I restricted the looping until X hours using MessagePostProcessor however i wanted to enable delay on message level and every time it tries to access the service. For example 1st try 3000ms delay and second time 6000ms so on until i try x number of time.

It would be great if you provide a few examples.

Could you please provide me some idea on this?

Answer 1

I added CustomeMessage delay exchange

    @Bean
    CustomExchange delayExchange() {
        Map<String, Object> args = new HashMap<>();
        args.put("x-delayed-type", "direct");
        return new CustomExchange("delayed-exchange", "x-delayed-message", true, false, args);
    }

Added MessagePostProcessor

  if (message.getMessageProperties().getHeaders().get("x-delay") == null) {
            message.getMessageProperties().setHeader("x-delay", 10000);
        } else {

            Integer integer = (Integer) message.getMessageProperties().getHeaders().get("x-delay");
            if (integer < 60000) {
                integer = integer + 10000;
                message.getMessageProperties().setHeader("x-delay", integer);
            }
        }

First time it delays 30 seconds and adds 10seconds each time till it reaches 600 seconds.This should be configurable.

And finally send the message to 

    rabbitTemplate.convertAndSend("delayed-exchange", queueName,message, rabbitMQMessagePostProcessor);