基于Redisson实现Redis分布式锁_redissonclient添加分布式锁

基于Redisson实现Redis分布式锁 https://riemann.blog.csdn.net/article/details/104763755

@Controller
public class RedisLockController {

    private static final Logger LOGGER = LoggerFactory.getLogger(RedisLockController.class);

    @Resource
    private RedissonClient redissonClient;

    @Resource
    private StringRedisTemplate stringRedisTemplate;

    @RequestMapping("/deduct_stock_2")
    @Transactional
    public ApiResult deductStock() {
        String lockKey = "lockKey";
        RLock rLock = redissonClient.getLock(lockKey);
        try {
            rLock.lock();
            int stockNum = Integer.parseInt(stringRedisTemplate.opsForValue().get("stock"));
            if (stockNum > 0) {
                int realStockNum = stockNum - 1;
                stringRedisTemplate.opsForValue().set("stock", realStockNum + "");
                LOGGER.info("扣减成功，剩余库存：{}", realStockNum);
            } else {
                LOGGER.info("扣减失败，库存不足");
            }
        } finally {
            rLock.unlock();
        }
        return new ApiResult();
    }
}

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