redis解决高并发看门狗策略的实现

  <!-- 集成Redis-->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-data-redis</artifactId>
        </dependency>

            <dependency>
                <groupId>org.redisson</groupId>
                <artifactId>redisson-spring-boot-starter</artifactId>
                <version>3.21.0</version>
            </dependency>

spring:
  data:
    redis: # redis配置
      url: redis://:127.0.0.1:6379

  public void doConfirm(ConfirmOrderDoReq req) {
        String lockKey = DateUtil.formatDate(req.getDate()) + "-" + req.getTrainCode();
        RLock lock = null;
        try {
            lock = redissonClient.getLock(lockKey);

            boolean tryLock = lock.tryLock(0, TimeUnit.SECONDS);

            if (tryLock) {
                LOG.info("抢到锁，开始处理订单");
            } else {
                LOG.info("很遗憾，没有抢到锁");
                //当前抢票人数多，请稍后再试
                throw new BusinessException(BusinessExceptionEnum.CONFIRM_ORDER_LOCK_FAIL);
            }
            //业务处理。。。。

        } catch (InterruptedException e) {
            LOG.error("抢票失败", e);
            throw new BusinessException(BusinessExceptionEnum.CONFIRM_ORDER_LOCK_FAIL);
        } finally {
            LOG.info("锁被释放了");
            // 释放锁
            if (lock != null && lock.isHeldByCurrentThread()){
                lock.unlock();
            }
        }
    }