Rabbit基于插件实现一个延迟队列

前言：基于死信的延迟队列存在漏洞问题，所以要使用基于插件的延迟队列。前者延迟的时机发生在队列，后者则在交换机。
插件在官网上下载：https://www.rabbitmq.com/commuinty-plugins.html
插件安装成功后，可以在管理员界面看到这个下拉选项：

流程图：

配置类：

@Configuration
public class DelayedQueueConfig {

    // 队列
    public static final String DELAYED_QUEUE_NAME = "delayed.queue";

    // 交换机
    public static final String DELAYED_EXCHANGE_NAME = "delayed.exchange";

    // RoutingKey
    public static final String DELAYED_ROUTING_KEY = "delayed.routingkey";

    @Bean
    public Queue delayedQueue() {
        return new Queue(DELAYED_QUEUE_NAME);
    }

    // 声明交换机(基于插件)
    @Bean
    public CustomExchange delayedExchange() {
        Map arguments = new HashMap<>();
        arguments.put("x-delayed-type", "direct");
        
        return new CustomExchange(DELAYED_EXCHANGE_NAME, "x-delayed-message", true,false,arguments);
    }

    // 绑定
    @Bean
    public Binding delayedQueueBindingDelayedChange(
            @Qualifier("delayedQueue") Queue delayedQueue,
            @Qualifier("delayedExchange") CustomExchange delayedExchange
    ) {
        return BindingBuilder.bind(delayedQueue).to(delayedExchange).with(DELAYED_ROUTING_KEY).noargs();
    }
}

生产者：

    // 开始发消息，基于插件的 消息 以及 延迟的时间
    @GetMapping("/sendDelayMsg/{message}/{delayTime}")
    public void sendMsg(@PathVariable String message, @PathVariable Integer delayTime) {
        log.info("当前时间:{}, 发送一条时长{}毫秒TTL信息给延迟队列delayed.queue：{}", new Date().toString(), delayTime, message);
        rabbitTemplate.convertAndSend(DelayedQueueConfig.DELAYED_EXCHANGE_NAME,
                DelayedQueueConfig.DELAYED_ROUTING_KEY, message, msg -> {
                    // 消息的延迟时长,单位ms
                    msg.getMessageProperties().setDelay(delayTime);
                    return msg;
                });
    }

消费者：

@Slf4j
@Component
public class DelayQueueConsumer {

    // 监听消息
    @RabbitListener(queues = DelayedQueueConfig.DELAYED_QUEUE_NAME)
    public void receiveDelayQueue(Message message) {
        String msg = new String(message.getBody(), StandardCharsets.UTF_8);
        log.info("当前时间：{}， 收到延迟队列：{}", new Date().toString(), msg);
    }
}