Method Get

engine/db.go:250–269

Get Read data according to the key

(key []byte)

// Get Read data according to the key
func (db *DB) Get(key []byte) ([]byte, error) {
	zap.L().Info("get", zap.ByteString("key", key))
	db.lock.RLock()
	defer db.lock.RUnlock()

	// Determine the validity of the key
	if len(key) == 0 {
		return nil, _const.ErrKeyIsEmpty
	}

	// Retrieves the index of the key from the memory data structure
	logRecordPst := db.index.Get(key)
	// If key is not in the memory index, it does not exist
	if logRecordPst == nil {
		return nil, _const.ErrKeyNotFound
	}

	// Gets the value from the data file
	return db.getValueByPosition(logRecordPst)
}

// GetListKeys Gets all the keys in the database
func (db *DB) GetListKeys() [][]byte {