100 lines
2.2 KiB
Go
100 lines
2.2 KiB
Go
package shard
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import (
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objectSDK "github.com/nspcc-dev/neofs-api-go/pkg/object"
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"github.com/nspcc-dev/neofs-node/pkg/core/object"
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"github.com/nspcc-dev/neofs-node/pkg/local_object_storage/blobovnicza"
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"github.com/nspcc-dev/neofs-node/pkg/local_object_storage/blobstor"
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)
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// RngPrm groups the parameters of GetRange operation.
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type RngPrm struct {
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ln uint64
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off uint64
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addr *objectSDK.Address
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}
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// RngPrm groups resulting values of GetRange operation.
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type RngRes struct {
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obj *object.Object
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}
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// WithAddress is a Rng option to set the address of the requested object.
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//
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// Option is required.
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func (p *RngPrm) WithAddress(addr *objectSDK.Address) *RngPrm {
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if p != nil {
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p.addr = addr
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}
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return p
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}
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// WithRange is a GetRange option to set range of requested payload data.
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func (p *RngPrm) WithRange(off uint64, ln uint64) *RngPrm {
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if p != nil {
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p.off, p.ln = off, ln
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}
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return p
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}
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// Object returns the requested object part.
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//
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// Instance payload contains the requested range of the original object.
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func (r *RngRes) Object() *object.Object {
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return r.obj
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}
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// GetRange reads part of an object from shard.
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//
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// Returns any error encountered that
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// did not allow to completely read the object part.
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func (s *Shard) GetRange(prm *RngPrm) (*RngRes, error) {
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var big, small storFetcher
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rng := objectSDK.NewRange()
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rng.SetOffset(prm.off)
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rng.SetLength(prm.ln)
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big = func(stor *blobstor.BlobStor, _ *blobovnicza.ID) (*object.Object, error) {
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getRngBigPrm := new(blobstor.GetRangeBigPrm)
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getRngBigPrm.SetAddress(prm.addr)
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getRngBigPrm.SetRange(rng)
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res, err := stor.GetRangeBig(getRngBigPrm)
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if err != nil {
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return nil, err
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}
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obj := object.NewRaw()
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obj.SetPayload(res.RangeData())
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return obj.Object(), nil
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}
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small = func(stor *blobstor.BlobStor, id *blobovnicza.ID) (*object.Object, error) {
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getRngSmallPrm := new(blobstor.GetRangeSmallPrm)
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getRngSmallPrm.SetAddress(prm.addr)
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getRngSmallPrm.SetRange(rng)
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getRngSmallPrm.SetBlobovniczaID(id)
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res, err := stor.GetRangeSmall(getRngSmallPrm)
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if err != nil {
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return nil, err
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}
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obj := object.NewRaw()
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obj.SetPayload(res.RangeData())
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return obj.Object(), nil
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}
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obj, err := s.fetchObjectData(prm.addr, big, small)
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return &RngRes{
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obj: obj,
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}, err
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}
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