Rabbit_MQ_dead_letter.java

    @Bean
    public List<Declarable> queueDeclarations()
    {
        boolean durable = true;
        boolean autoDelete = false;
        boolean exclusive = false;
        Map<String, Object> args = new HashMap<>();
        args.put("x-dead-letter-exchange", "dl.exchange");
        args.put("x-dead-letter-queue", "dl.queue");
        return Arrays.asList(
                new FanoutExchange("dl.exchange", durable, autoDelete),
                new DirectExchange("my.exchange", durable, autoDelete),
                new Queue("my.queue", durable, exclusive, autoDelete, args),
                new Queue("dl.queue", durable),
                new Binding("dl.queue", Binding.DestinationType.QUEUE, "dl.exchange", "dl.queue", null),
                new Binding("my.queue", Binding.DestinationType.QUEUE, "my.exchange", "my.queue", null)
        );
    }