44 lines
849 B
Go
44 lines
849 B
Go
package newcomer
|
|
|
|
import (
|
|
"context"
|
|
"fmt"
|
|
"go-common/library/log"
|
|
)
|
|
|
|
const (
|
|
_preLock = "creative_task_"
|
|
)
|
|
|
|
func lockKey(key string) string {
|
|
return fmt.Sprintf("%s%s", _preLock, key)
|
|
}
|
|
|
|
//Lock .
|
|
func (d *Dao) Lock(ctx context.Context, key string, ttl int) (gotLock bool, err error) {
|
|
var lockValue = "1"
|
|
conn := d.redis.Get(ctx)
|
|
defer conn.Close()
|
|
realKey := lockKey(key)
|
|
var res interface{}
|
|
//ttl 毫秒(PX) NX 其实就是 SetNX功能
|
|
res, err = conn.Do("SET", realKey, lockValue, "PX", ttl, "NX")
|
|
if err != nil {
|
|
log.Error("receive_lock failed:%s:%s", realKey, err.Error())
|
|
return
|
|
}
|
|
if res != nil {
|
|
gotLock = true
|
|
}
|
|
return
|
|
}
|
|
|
|
//UnLock .
|
|
func (d *Dao) UnLock(ctx context.Context, key string) (err error) {
|
|
realKey := lockKey(key)
|
|
conn := d.redis.Get(ctx)
|
|
defer conn.Close()
|
|
_, err = conn.Do("DEL", realKey)
|
|
return
|
|
}
|