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A simple tiny centralized lock service, still in development.
Although there are some existing key lock service, like Zookeeper, Etcd, or even Redis, they don't fit my need. E.g, I want to lock multi keys at same time, not one by one. And I want to support hierachical path lock.
If you have some good recommendations, please tell me!
We can lock multi keys using tlock at same time, a simple example:
// shell1
// lock key a, b and c at same time, lock timeout is 30s
// if lock ok, return a lockid for later unlock
// you must do query escape in the real scenario,:-)
POST http://localhost/lock?names=a,b,c&type=key&timeout=30
// do something then unlock
DELETE http://localhost/lock?id=lockid
// shell2
POST http://localhost/lock?names=a,b,c&type=key&timeout=30
return lockid
DELETE http://localhost/lock?id=lockid
A path lock is for hierachical lock, like a file system lock.
E.g, if we lock path "a/b/c", other can not operate its ancestor like ("a", "a/b") or descendant like ("a/b/c/d", "a/b/c/e"), but can operate its brother like ("a/b/d").
A simple example:
// shell1
// lock path a/b/c, a/b/d at same time, lock timeout is 30s
// if lock ok, return a lockid for later unlock
// you must do query escape in the real scenario,:-)
POST http://localhost/lock?names=a/b/c,a/b/d&type=path&timeout=30
// do something then unlock
DELETE http://localhost/lock?id=lockid
// shell2
POST http://localhost/lock?names=a/b/c,a/b/d&type=path&timeout=30
DELETE http://localhost/lock?id=lockid
tlock supports Redis Serialiazation Protocol(RESP), so you can use any redis client to communicate with tlock, a simple example:
# shell1 redis-cli
redis>LOCK abc TYPE key TIMEOUT 10
redis>lockid
// do something
redis>UNLOCK lockid
redis>OK
# shell2 redis-cli
redis>LOCK abc TYPE key TIMEOUT 10
// will hang up until shell1 unlock
redis>lockid
// do something
redis>UNLOCK lockid
redis>OK
You can also use a RESP client for tlock:
import "github.com/siddontang/tlock"
client := NewRESPClient(addr)
locker, _ := client.GetLocker("key", "abc")
locker.Lock()
locker.Unlock()
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