SpringCloud 整合在一起

以下配置创建一个交换myDestination，其中队列myDestination.consumerGroup与通配符路由键#绑定到主题交换：

---
spring.cloud.stream.bindings.input.destination=myDestination
spring.cloud.stream.bindings.input.group=consumerGroup
#disable binder retries
spring.cloud.stream.bindings.input.consumer.max-attempts=1
#dlx/dlq setup
spring.cloud.stream.rabbit.bindings.input.consumer.auto-bind-dlq=true
spring.cloud.stream.rabbit.bindings.input.consumer.dlq-ttl=5000
spring.cloud.stream.rabbit.bindings.input.consumer.dlq-dead-letter-exchange=
---

此配置将创建一个绑定到直接交换（DLX）的DLQ，其路由密钥为myDestination.consumerGroup。当邮件被拒绝时，它们将被路由到DLQ。5秒后，该消息到期，并通过使用队列名称作为路由键将其路由到原始队列，如以下示例所示：

Spring Boot应用程序。 

@SpringBootApplication
@EnableBinding(Sink.class)
public class XDeathApplication {

    public static void main(String[] args) {
        SpringApplication.run(XDeathApplication.class, args);
    }

    @StreamListener(Sink.INPUT)
    public void listen(String in, @Header(name = "x-death", required = false) Map<?,?> death) {
        if (death != null && death.get("count").equals(3L)) {
            // giving up - don't send to DLX
            throw new ImmediateAcknowledgeAmqpException("Failed after 4 attempts");
        }
        throw new AmqpRejectAndDontRequeueException("failed");
    }

}

请注意，x-death标头中的count属性是Long。