// 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
}
// 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
}