disk

type DB interface {
	Incr(k string, by int64) (int64, error)
	Set(k string, v []byte, ttl time.Duration) error
	MSet(data map[string][]byte) error
	Get(k string) ([]byte, error)
	MGet(keys []string) [][]byte
	TTL(key string) int64
	MDel(keys []string) error
	Del(key string) error
	Scan(ScannerOpt ScannerOptions) error
	Size() int64
	GC() error
	Close()
}

type LevelDB struct {
	sync.RWMutex
	// contains filtered or unexported fields
}

type ScannerOptions struct {
	// from where to start
	Offset string

	// whether to include the value of the offset in the result or not
	IncludeOffset bool

	// the prefix that must be exists in each key in the iteration
	Prefix string

	// fetch the values (true) or this is a key only iteration (false)
	FetchValues bool

	// the handler that handles the incoming data
	Handler func(k []byte, v []byte) error
}