forked from TrueCloudLab/frostfs-node
62 lines
1.4 KiB
Go
62 lines
1.4 KiB
Go
package blobstor
|
|
|
|
import (
|
|
"errors"
|
|
|
|
"github.com/nspcc-dev/neofs-node/pkg/local_object_storage/blobstor/fstree"
|
|
"github.com/nspcc-dev/neofs-sdk-go/object"
|
|
)
|
|
|
|
// ExistsPrm groups the parameters of Exists operation.
|
|
type ExistsPrm struct {
|
|
address
|
|
}
|
|
|
|
// ExistsRes groups resulting values of Exists operation.
|
|
type ExistsRes struct {
|
|
exists bool
|
|
}
|
|
|
|
// Exists returns the fact that the object is in BLOB storage.
|
|
func (r ExistsRes) Exists() bool {
|
|
return r.exists
|
|
}
|
|
|
|
// Exists checks if object is presented in BLOB storage.
|
|
//
|
|
// Returns any error encountered that did not allow
|
|
// to completely check object existence.
|
|
func (b *BlobStor) Exists(prm *ExistsPrm) (*ExistsRes, error) {
|
|
// check presence in shallow dir first (cheaper)
|
|
exists, err := b.existsBig(prm.addr)
|
|
if !exists {
|
|
// TODO: do smth if err != nil
|
|
|
|
// check presence in blobovnicza
|
|
exists, err = b.existsSmall(prm.addr)
|
|
}
|
|
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
return &ExistsRes{
|
|
exists: exists,
|
|
}, err
|
|
}
|
|
|
|
// checks if object is presented in shallow dir.
|
|
func (b *BlobStor) existsBig(addr *object.Address) (bool, error) {
|
|
_, err := b.fsTree.Exists(addr)
|
|
if errors.Is(err, fstree.ErrFileNotFound) {
|
|
return false, nil
|
|
}
|
|
|
|
return err == nil, err
|
|
}
|
|
|
|
// checks if object is presented in blobovnicza.
|
|
func (b *BlobStor) existsSmall(addr *object.Address) (bool, error) {
|
|
// TODO: implement
|
|
return false, nil
|
|
}
|