Method findHashMeta

structure/hash.go:1362–1402

findHashMeta finds the hash metadata by the given key.

(key string, dataType DataStructure)

// findHashMeta finds the hash metadata by the given key.
func (hs *HashStructure) findHashMeta(key string, dataType DataStructure) (*HashMetadata, error) {
	// Convert the parameters to bytes
	k := stringToBytesWithKey(key)

	// Find the hash metadata by the given key
	meta, err := hs.db.Get(k)
	if err != nil && err != _const.ErrKeyNotFound {
		return nil, err
	}

	var hashMeta *HashMetadata
	var exist = true
	// If the hash metadata is not found, create a new one
	if err == _const.ErrKeyNotFound {
		exist = false
	} else {
		// Decode the hash metadata
		hashMeta = decodeHashMeta(meta)

		// Check the data type
		if hashMeta.dataType != dataType {
			return nil, ErrInvalidType
		}

	}

	// If the hash metadata is not found, create a new one
	if !exist {
		hashMeta = &HashMetadata{
			dataType:        dataType,
			dataSize:        0,
			expire:          0,
			version:         time.Now().UnixNano(),
			counter:         0,
			createdTime:     time.Now().UnixNano(),
			lastUpdatedTime: time.Now().UnixNano(),
		}
	}

	return hashMeta, nil
}

func (hs *HashStructure) Stop() error {
	err := hs.db.Close()