Golang Open示例

示例#1

文件： db.go 项目： orthogonous/banshee

// Open a DB by fileName and options.
func Open(fileName string) (*DB, error) {
	// Create if not exist
	_, err := os.Stat(fileName)
	if os.IsNotExist(err) {
		log.Debug("create dir %s", fileName)
		err := os.Mkdir(fileName, filemode)
		if err != nil {
			return nil, err
		}
	}
	// Admindb.
	db := new(DB)
	db.Admin, err = admindb.Open(path.Join(fileName, admindbFileName))
	if err != nil {
		return nil, err
	}
	// Indexdb.
	db.Index, err = indexdb.Open(path.Join(fileName, indexdbFileName))
	if err != nil {
		return nil, err
	}
	// Metricdb.
	db.Metric, err = metricdb.Open(path.Join(fileName, metricdbFileName))
	if err != nil {
		return nil, err
	}
	log.Debug("storage is opened successfully")
	return db, nil
}

示例#2

文件： db.go 项目： nrzipher/banshee

// Open a DB by fileName and options.
func Open(fileName string, options *Options) (*DB, error) {
	// Create if not exist
	_, err := os.Stat(fileName)
	if os.IsNotExist(err) {
		log.Debug("create dir %s", fileName)
		err := os.Mkdir(fileName, filemode)
		if err != nil {
			return nil, err
		}
	}
	// Admindb.
	db := new(DB)
	db.Admin, err = admindb.Open(path.Join(fileName, admindbFileName))
	if err != nil {
		return nil, err
	}
	// Indexdb.
	db.Index, err = indexdb.Open(path.Join(fileName, indexdbFileName))
	if err != nil {
		return nil, err
	}
	// Metricdb.
	db.Metric, err = metricdb.Open(path.Join(fileName, metricdbFileName))
	if err != nil {
		return nil, err
	}
	name := fmt.Sprintf("%s-%dx%d", statedbFileName, options.NumGrid, options.GridLen)
	opts := &statedb.Options{NumGrid: options.NumGrid, GridLen: options.GridLen}
	// Statedb.
	db.State, err = statedb.Open(path.Join(fileName, name), opts)
	if err != nil {
		return nil, err
	}
	log.Debug("storage is opened successfully")
	return db, nil
}