使用redis实现分布式锁

class RedisDistributedLock(object):
    def __init__(self):
        self.redis_cli = distributed_lock_redis_client(timeout=1)
        self.lock_timeout = 10
 self.lock_key = "random_lock_key"
 self.now = long(time.time())
        self.timestamp = self.now + self.lock_timeout

    def getLock(self):
        try:
            lock = self.redis_cli.setnx(self.lock_key, self.timestamp)
            if lock == True:
                return True

 last_timestamp = self.redis_cli.get(self.lock_key)
            if last_timestamp and long(last_timestamp) <= self.now:
                self.redis_cli.getset(self.lock_key, self.timestamp)
                return True
 return False
 except Exception, ex:
            logger.exception("[RedisDistributedLock] getLock fail error=%s" % ex)


    def releaseLock(self):
        try:
            last_timestamp = self.redis_cli.get(self.lock_key)
            if last_timestamp and long(last_timestamp) == self.timestamp:
                self.redis_cli.delete(self.lock_key)
        except Exception, ex:
            logger.exception("[RedisDistributedLock] releaseLock fail error=%s" % ex)