我是go-redis distributed lock
用来实现互斥访问的,我的服务器是单线程服务器。但同时,许多请求都获得了distributed lock
.
func (redisMgrPtr *RedisMgr) getLock(key string) (int32) {
encodeKey := transcoding.Base64Encode(key)
_, err := redisMgrPtr.redisClient.SetNX(redisMgrPtr.ctx,
encodeKey, 1, TIMEOUT).Result()
if err != nil {
return -1
}
return 0
}
func (redisMgrPtr *RedisMgr) delLock(key string, sessionId string) {
encodeKey := transcoding.Base64Encode(key)
redisMgrPtr.redisClient.Del(redisMgrPtr.ctx, encodeKey)
Log.Errorf("session[%s] del lock", sessionId)
}
获取锁码是这样的:
func (redisMgrPtr *RedisMgr) GetServer(name string, session string) () {
for {
locRes := redisMgrPtr.getLock(name)
if locRes == 0 {
break
} else {
time.Sleep(5 * time.Millisecond)
continue
}
}
defer redisMgrPtr.delLock(sceneLock, sessionId)
Log.Errorf("session[%s] get lock", sessionId)
// do something
}
我发现许多请求同时获得锁,结果是
2021-09-08T15:05:21.073+0800 session[51776955325] get lock
2021-09-08T15:05:21.073+0800 session[91776955325] get lock
2021-09-08T15:05:21.073+0800 session[71776955325] get lock
我认为同时只有一个会话可以获得锁定