@Bean
public Queue deadQueue() {
  return new Queue(DEAD_QUEUE_NAME, true);
}
 
@Bean
public DirectExchange deadExchange() {
  return new DirectExchange(DEAD_EXCHANGE_NAME);
}
 
@Bean
public Binding bindingDeadExchange(Queue deadQueue, DirectExchange deadExchange) {
  return BindingBuilder.bind(deadQueue).to(deadExchange).with(DEAD_ROUTING_KEY);
}
 
@Bean
Queue directQueue() {
  Map<String, Object> args = new HashMap<>(2);
  args.put("x-dead-letter-exchange", DEAD_EXCHANGE_NAME);
  args.put("x-dead-letter-routing-key", DEAD_ROUTING_KEY);
  return new Queue(DIRECT_QUEUE_NAME, true, false, false, args);
}