go-ayo/common을 gocommon으로 분리

locker_redis.go

@@ -0,0 +1,43 @@
+package common
+
+import (
+	"context"
+	"errors"
+	"time"
+
+	"repositories.action2quare.com/ayo/gocommon/logger"
+
+	"github.com/go-redis/redis/v8"
+)
+
+var txSetArgs redis.SetArgs = redis.SetArgs{
+	TTL:  time.Second * 30,
+	Mode: "NX",
+}
+
+type LockerWithRedis struct {
+	key string
+}
+
+var ErrTransactionLocked = errors.New("transaction is already locked")
+var ErrTransactionHSet = errors.New("transaction set is failed by unkwoun reason")
+
+func (locker *LockerWithRedis) Lock(rc *redis.Client, key string) error {
+	resultStr, err := rc.SetArgs(context.Background(), key, true, txSetArgs).Result()
+	if err != nil && err != redis.Nil {
+		return err
+	}
+
+	if len(resultStr) <= 0 {
+		// 이미 있네? 락이 걸려있다
+		logger.Println(ErrTransactionLocked, key)
+		return ErrTransactionLocked
+	}
+
+	locker.key = key
+	return nil
+}
+
+func (locker *LockerWithRedis) Unlock(rc *redis.Client) {
+	rc.Del(context.Background(), locker.key).Result()
+}