frostfs-node/pkg/local_object_storage/metabase/small.go

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package meta
import (
"github.com/nspcc-dev/neo-go/pkg/util/slice"
"github.com/nspcc-dev/neofs-node/pkg/local_object_storage/blobovnicza"
oid "github.com/nspcc-dev/neofs-sdk-go/object/id"
"go.etcd.io/bbolt"
)
// IsSmallPrm groups the parameters of IsSmall operation.
type IsSmallPrm struct {
addr oid.Address
}
// IsSmallRes groups the resulting values of IsSmall operation.
type IsSmallRes struct {
id *blobovnicza.ID
}
// WithAddress is a IsSmall option to set the object address to check.
func (p *IsSmallPrm) WithAddress(addr oid.Address) {
if p != nil {
p.addr = addr
}
}
// BlobovniczaID returns blobovnicza identifier.
func (r IsSmallRes) BlobovniczaID() *blobovnicza.ID {
return r.id
}
// IsSmall returns blobovniczaID for small objects and nil for big objects.
// Small objects stored in blobovnicza instances. Big objects stored in FS by
// shallow path which is calculated from address and therefore it is not
// indexed in metabase.
func (db *DB) IsSmall(prm IsSmallPrm) (res IsSmallRes, err error) {
db.modeMtx.RLock()
defer db.modeMtx.RUnlock()
err = db.boltDB.View(func(tx *bbolt.Tx) error {
res.id, err = db.isSmall(tx, prm.addr)
return err
})
return
}
func (db *DB) isSmall(tx *bbolt.Tx, addr oid.Address) (*blobovnicza.ID, error) {
smallBucket := tx.Bucket(smallBucketName(addr.Container()))
if smallBucket == nil {
return nil, nil
}
blobovniczaID := smallBucket.Get(objectKey(addr.Object()))
if len(blobovniczaID) == 0 {
return nil, nil
}
return blobovnicza.NewIDFromBytes(slice.Copy(blobovniczaID)), nil
}