RabbitMQ实现秒杀场景示例

本文章通过MQ队列来实现秒杀场景

整体的设计如下图，整个流程中对于发送发MQ失败和发送到死信队列的数据未做后续处理

1、首先先创建MQ的配置文件

@Configuration
public class RabbitConfig  {


    public static final String DEAD_LETTER_EXCHANGE = "deadLetterExchange";
    public static final String DEAD_LETTER_QUEUEA_ROUTING_KEY = "dead.#";
    public static final String DEAD_LETTER_QUEUEA_NAME = "deadQueue";

    @Autowired
    private RabbitTemplate rabbitTemplate;

    @Autowired
    private ConnectionFactory connectionFactory;

    @Bean
    public TopicExchange topicExchange(){
        return new TopicExchange("seckill_topic",true,false);
    }

    // 声明死信Exchange
    @Bean("deadLetterExchange")
    public DirectExchange deadLetterExchange(){
        return new DirectExchange(DEAD_LETTER_EXCHANGE);
    }

    @Bean("seckillQueue")
    public Queue seckillQueue(){
        Map<String,Object> args = new HashMap<>();
        args.put("x-dead-letter-exchange", DEAD_LETTER_EXCHANGE);
        //  x-dead-letter-routing-key  这里声明当前队列的死信路由key
        args.put("x-dead-letter-routing-key", DEAD_LETT