运用分布式锁 redisson

导入依赖 根据springboot版本不同自行选择版本

org.redisson
redisson-spring-boot-starter
3.15.3

创建客户端

@Bean
    public RedissonClient redissonClient() {
        Config config = new Config();
        config.useSingleServer()
                .setAddress("redis://192.168.232.100:6379");
        return Redisson
                .create(config);
    }

   //创建一个key  如果有这个key lock返回true 否则返回false
    RLock lock = redissonClient.getLock("r_lock");
    //把全部商品信息放进redis中
        storeService.check();
    //如果true
        if (hasLock) {
        try {
            String maota = stringRedisTemplate.opsForValue().get("store:1");
            Long maotao = Long.valueOf(maota);
            if (maotao > 0) {
                maotao = stringRedisTemplate.opsForValue().decrement("store:1");
                log.debug("售出茅台一瓶,还剩:{}瓶", maotao);
                new Thread(()->storeService.updateByBookId(1,1));
                return HttpResp.success("去库存成功");
            }
        } finally {
            //成功与否都删除key
            lock.unlock();
            log.debug("释放分布式锁成功");
        }
    }
        log.debug("去库存失败");
        return HttpResp.failed("去库存失败");
}