frostfs-node/pkg/local_object_storage/shard/id.go
Evgenii Stratonikov 19ad349b27 [#1204] shard: Save ID in the metabase
`AddShard` must return shard id, so we temporarily open metabase
there.

Signed-off-by: Evgenii Stratonikov <evgeniy@nspcc.ru>
2022-03-04 17:13:13 +03:00

47 lines
893 B
Go

package shard
import (
"github.com/mr-tron/base58"
)
// ID represents Shard identifier.
//
// Each shard should have the unique ID within
// a single instance of local storage.
type ID []byte
// NewIDFromBytes constructs ID from byte slice.
func NewIDFromBytes(v []byte) *ID {
return (*ID)(&v)
}
func (id ID) String() string {
return base58.Encode(id)
}
// ID returns Shard identifier.
func (s *Shard) ID() *ID {
return s.info.ID
}
// UpdateID reads shard ID saved in the metabase and updates it if it is missing.
func (s *Shard) UpdateID() (err error) {
if err = s.metaBase.Open(); err != nil {
return err
}
defer func() {
cErr := s.metaBase.Close()
if err == nil {
err = cErr
}
}()
id, err := s.metaBase.ReadShardID()
if err != nil {
return err
}
if len(id) != 0 {
s.info.ID = NewIDFromBytes(id)
return nil
}
return s.metaBase.WriteShardID(*s.info.ID)
}