Shulou(Shulou.com)06/02 Report--

In this issue, the editor will bring you about how to use Lua script to achieve a distributed lock in Redis. The article is rich in content and analyzes and describes for you from a professional point of view. I hope you can get something after reading this article.

Get the lock, you can specify the expiration time

-- [eval "if redis.call ('setnx', KEYS [1], ARGV [1]) = = 1 then redis.call (' pexpire', KEYS [1], ARGV [2]); return 1; else return 0 End "1" myLock "1 30000 redis-cli-p 6379-a password-- eval. / tryLock.lua myLock, 13000 val]] local function tryLock (key, val, expire) if (redis.call ('setnx', key, val) = = 1) then redis.call (' pexpire', key) Expire) return 1 else return 0 endendlocal key = KEYS [1] local val = ARGV [1] local expire = ARGV [2] return tryLock (key, val, expire)

Release lock

[[eval "if redis.call ('get', KEYS [1]) = = ARGV [1] then redis.call (' del', KEYS [1]); return 1; else return 0 End "1 myLock 1 redis-cli-p 6379-a password-- eval. / releaseLock.lua myLock, 1 redis.call -]] local function releaseLock (key, val) if (redis.call ('get', key) = = val) then if (redis.call (' del') Key) > 0) then return 1 end end return 0endlocal key = KEYS [1] local val = ARGV [1] return releaseLock (key, val) this is how to use Lua script to implement a distributed lock in the Redis shared by the editor. If you happen to have similar doubts, you might as well refer to the above analysis to understand. If you want to know more about it, you are welcome to follow the industry information channel.

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