如何使用RabbitMQ实现异步秒杀

docker run --privileged=true -d -p 5672:5672 -p 15672:15672 --name rabbitmq rabbitmq:management
mkdir -p /usr/local/docker/rabbitmq

docker run --privileged=true -d -p 5672:5672 -p 15672:15672 --name rabbitmq rabbitmq:management

<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-amqp</artifactId>
</dependency>

  rabbitmq:
    host: 192.168.238.128 # 你的虚拟机IP
    port: 5672 # 端口
    virtual-host: /dianping # 虚拟主机
    username: guest # 用户名
    password: guest # 密码
    listener:
      direct:
        acknowledge-mode: manual

@Configuration
public class RabbitMQConfig {
   @Bean
   public MessageConverter messageConverter() {
       return new Jackson2JsonMessageConverter();
   }
}

    @Resource
    private RabbitTemplate rabbitTemplate;

    @Transactional
    public void handleVoucherOrder(VoucherOrder voucherOrder) {
        //1.所有信息从当前消息实体中拿
        Long voucherId = voucherOrder.getVoucherId();
        //2.扣减库存
        boolean success = seckillVoucherService.update().setSql("stock=stock-1")
                .eq("voucher_id", voucherId)
                //======判断当前库存是否大于0就可以决定是否能抢池子中的券了
                .gt("stock", 0)
                .update();
        //3.创建订单
        save(voucherOrder);
    }
    @Override
    public Result seckillVoucher(Long voucherId) {
        //1.执行lua脚本，判断当前用户的购买资格
        Long userId = ThreadLocalUtls.getUser().getId();
        Long result = stringRedisTemplate.execute(
                SECKILL_SCRIPT,
                Collections.emptyList(),
                voucherId.toString(), userId.toString());
        if (result != 0) {
            //2.不为0说明没有购买资格
            return Result.fail(result==1?"库存不足":"不能重复下单");
        }
        //3.走到这一步说明有购买资格，将订单信息存到阻塞队列
        VoucherOrder voucherOrder = new VoucherOrder();
        long orderId = redisIdWorker.nextId("order");
        voucherOrder.setId(orderId);
        voucherOrder.setUserId(ThreadLocalUtls.getUser().getId());
        voucherOrder.setVoucherId(voucherId);
        //存入消息队列等待异步消费
        rabbitTemplate.convertAndSend("seckill.direct","seckill.order",voucherOrder);
        return Result.ok(orderId);
    }

@Component
public class SeckillOrderListener {
 @Autowired
 VoucherOrderServiceImpl voucherOrderService;
 @RabbitListener(queues = {"seckill.order.queue"})
 public void recieveMessage(Message message, Channel channel, VoucherOrder voucherOrder){
     try {
         voucherOrderService.handleVoucherOrder(voucherOrder);
         channel.basicAck(message.getMessageProperties().getDeliveryTag(), false);
     } catch (IOException e) {
         throw new RuntimeException(e);
     }
 }