frostfs-node/pkg/local_object_storage/blobstor/get_range.go
Evgenii Stratonikov b621f5983a [#1523] local_object_storage: Move blobovnicza tree to a separate package
Signed-off-by: Evgenii Stratonikov <evgeniy@nspcc.ru>
2022-08-22 13:14:19 +03:00

83 lines
2.5 KiB
Go

package blobstor
import (
"errors"
"fmt"
"github.com/nspcc-dev/neofs-node/pkg/local_object_storage/blobstor/blobovniczatree"
"github.com/nspcc-dev/neofs-node/pkg/local_object_storage/blobstor/fstree"
apistatus "github.com/nspcc-dev/neofs-sdk-go/client/status"
objectSDK "github.com/nspcc-dev/neofs-sdk-go/object"
)
// GetRangeBigPrm groups the parameters of GetRangeBig operation.
type GetRangeBigPrm struct {
address
rwRange
}
// GetRangeBigRes groups the resulting values of GetRangeBig operation.
type GetRangeBigRes struct {
rangeData
}
// GetRangeBig reads data of object payload range from shallow dir of BLOB storage.
//
// Returns any error encountered that
// did not allow to completely read the object payload range.
//
// Returns ErrRangeOutOfBounds if the requested object range is out of bounds.
// Returns an error of type apistatus.ObjectNotFound if object is missing.
func (b *BlobStor) GetRangeBig(prm GetRangeBigPrm) (GetRangeBigRes, error) {
// get compressed object data
data, err := b.fsTree.Get(prm.addr)
if err != nil {
if errors.Is(err, fstree.ErrFileNotFound) {
var errNotFound apistatus.ObjectNotFound
return GetRangeBigRes{}, errNotFound
}
return GetRangeBigRes{}, fmt.Errorf("could not read object from fs tree: %w", err)
}
data, err = b.Decompress(data)
if err != nil {
return GetRangeBigRes{}, fmt.Errorf("could not decompress object data: %w", err)
}
// unmarshal the object
obj := objectSDK.New()
if err := obj.Unmarshal(data); err != nil {
return GetRangeBigRes{}, fmt.Errorf("could not unmarshal the object: %w", err)
}
payload := obj.Payload()
ln, off := prm.rng.GetLength(), prm.rng.GetOffset()
if pLen := uint64(len(payload)); ln+off < off || pLen < off || pLen < ln+off {
var errOutOfRange apistatus.ObjectOutOfRange
return GetRangeBigRes{}, errOutOfRange
}
return GetRangeBigRes{
rangeData: rangeData{
data: payload[off : off+ln],
},
}, nil
}
// GetRangeSmall reads data of object payload range from blobovnicza of BLOB storage.
//
// If blobovnicza ID is not set or set to nil, BlobStor tries to get payload range
// from any blobovnicza.
//
// Returns any error encountered that
// did not allow to completely read the object payload range.
//
// Returns ErrRangeOutOfBounds if the requested object range is out of bounds.
// Returns an error of type apistatus.ObjectNotFound if the requested object is missing in blobovnicza(s).
func (b *BlobStor) GetRangeSmall(prm blobovniczatree.GetRangeSmallPrm) (blobovniczatree.GetRangeSmallRes, error) {
return b.blobovniczas.GetRange(prm)
}