frostfs-node/pkg/local_object_storage/metabase/shard_id.go
Evgenii Stratonikov 19ad349b27 [] 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

36 lines
769 B
Go

package meta
import (
"github.com/nspcc-dev/neo-go/pkg/util/slice"
"go.etcd.io/bbolt"
)
var (
shardInfoBucket = []byte(invalidBase58String + "i")
shardIDKey = []byte("id")
)
// ReadShardID reads shard id from db.
// If id is missing, returns nil, nil.
func (db *DB) ReadShardID() ([]byte, error) {
var id []byte
err := db.boltDB.View(func(tx *bbolt.Tx) error {
b := tx.Bucket(shardInfoBucket)
if b != nil {
id = slice.Copy(b.Get(shardIDKey))
}
return nil
})
return id, err
}
// WriteShardID writes shard it to db.
func (db *DB) WriteShardID(id []byte) error {
return db.boltDB.Update(func(tx *bbolt.Tx) error {
b, err := tx.CreateBucketIfNotExists(shardInfoBucket)
if err != nil {
return err
}
return b.Put(shardIDKey, id)
})
}