示例#1
0
// Open opens the named kv DB file for reading/writing. It
// creates the file if it does not exist yet.
func Open(dbFile string, opts *kv.Options) (*kv.DB, error) {
	createOpen := kv.Open
	verb := "opening"
	if _, err := os.Stat(dbFile); os.IsNotExist(err) {
		createOpen = kv.Create
		verb = "creating"
	}
	if opts == nil {
		opts = &kv.Options{}
	}
	if opts.Locker == nil {
		opts.Locker = func(dbFile string) (io.Closer, error) {
			lkfile := dbFile + ".lock"
			cl, err := lock.Lock(lkfile)
			if err != nil {
				return nil, fmt.Errorf("failed to acquire lock on %s: %v", lkfile, err)
			}
			return cl, nil
		}
	}
	if v, _ := strconv.ParseBool(os.Getenv("CAMLI_KV_VERIFY")); v {
		opts.VerifyDbBeforeOpen = true
		opts.VerifyDbAfterOpen = true
		opts.VerifyDbBeforeClose = true
		opts.VerifyDbAfterClose = true
	}
	db, err := createOpen(dbFile, opts)
	if err != nil {
		return nil, fmt.Errorf("error %s %s: %v", verb, dbFile, err)
	}
	return db, nil
}
示例#2
0
// Open opens the named kv DB file for reading/writing. It
// creates the file if it does not exist yet.
func Open(filePath string, opts *kv.Options) (*kv.DB, error) {
	// TODO(mpl): use it in index pkg and such
	createOpen := kv.Open
	if _, err := os.Stat(filePath); os.IsNotExist(err) {
		createOpen = kv.Create
	}
	if opts == nil {
		opts = &kv.Options{}
	}
	if opts.Locker == nil {
		opts.Locker = func(fullPath string) (io.Closer, error) {
			return lock.Lock(filePath + ".lock")
		}
	}
	return createOpen(filePath, opts)
}