redis加锁并设置过期时间

@Service
public class RedisService {
    /** redis锁前缀 */
    private static final String REDIS_LOCK_PREFIX = "LOCK_SMART_WARING_";
    @Autowired
    RedisTemplate<String, Object> redisTemplate;

    /**
     * 加锁并设置过期时间
     *
     * @param lockName
     * @param lockExpire 过期时间 秒
     * @return
     */
    public boolean acquireLock(String lockName, int lockExpire) {
        if (redisTemplate.opsForValue().setIfAbsent(lockName, lockName)) {
            redisTemplate.expire(lockName, lockExpire, TimeUnit.SECONDS);
            return true;
        }
        if (redisTemplate.getExpire(lockName) == -1) {
            //保证锁一定设置过期时间
            redisTemplate.expire(lockName, lockExpire, TimeUnit.SECONDS);
        }
        return false;
    }

    /**
     * 加锁并设置过期时间
     *
     * @param lockName
     * @param lockExpire 过期时间 秒
     * @param acquireTimeout  获取锁超时时间  秒
     * @return
     */
    public boolean acquireLockWithTimeout(String lockName, int lockExpire, int acquireTimeout) {
        long end = System.currentTimeMillis() + acquireTimeout * 1000;
        while (System.currentTimeMillis() < end) {

            if (acquireLock(lockName, lockExpire)) {
                return true;
            }

            try {
                Thread.sleep(20);
            } catch (InterruptedException ie) {
                Thread.currentThread().interrupt();
            }
        }
        return false;
    }

    /**
     * 释放锁
     * @param lockName
     */
    public void releaseLock(String lockName){
        redisTemplate.delete(lockName);
    }


}