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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,49 @@ | ||
| package cache | ||
|
|
||
| import ( | ||
| "context" | ||
| "fmt" | ||
| "github.com/go-redis/redis/v8" | ||
| "time" | ||
| "video-center/pkg/util" | ||
| ) | ||
|
|
||
| func ActionFavoriteCache(videoId int64, actionType int32) error { | ||
| lockKey := fmt.Sprintf("lock:fav:vid:%d", videoId) | ||
| favoriteKey := fmt.Sprintf("favorite:%d", videoId) | ||
| lock, err := RedisLock(fmt.Sprintf(lockKey, videoId), 3*time.Second) | ||
| if err != nil || !lock { | ||
| return err | ||
| } | ||
| defer RedisUnlock(fmt.Sprintf(lockKey, videoId)) | ||
| // 查询 Redis 中的值 | ||
| favoriteCount, err := RedisClient.Get(context.Background(), favoriteKey).Int64() | ||
| if err != nil { | ||
| if err != redis.Nil { | ||
| return err | ||
| } | ||
| // TODO 查询mysql中的值 | ||
| } | ||
| favoriteCount++ | ||
| RedisClient.Set(context.Background(), favoriteKey, favoriteCount, 3*time.Minute) | ||
| // TODO 异步更新mysql中的值 | ||
| return nil | ||
| } | ||
|
|
||
| // RedisLock redis分布式锁 | ||
| func RedisLock(lockKey string, lockTimeout time.Duration) (bool, error) { | ||
| lockAcquired, err := RedisClient.SetNX(context.Background(), lockKey, "lock-true", lockTimeout).Result() | ||
| if err != nil { | ||
| return false, err | ||
| } | ||
|
|
||
| return lockAcquired, nil | ||
| } | ||
|
|
||
| // RedisUnlock redis分布式锁解锁 | ||
| func RedisUnlock(lockKey string) { | ||
| _, err := RedisClient.Del(context.Background(), lockKey).Result() | ||
| if err != nil { | ||
| util.LogrusObj.Error("<Redis-FavoriteAction>, Unlock failed", err) | ||
| } | ||
| } |