115 lines
2.8 KiB
Go
115 lines
2.8 KiB
Go
package shard
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import (
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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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"github.com/nspcc-dev/neofs-sdk-go/object"
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oid "github.com/nspcc-dev/neofs-sdk-go/object/id"
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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 oid.Address
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skipMeta bool
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}
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// RngRes groups the resulting values of GetRange operation.
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type RngRes struct {
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obj *object.Object
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hasMeta bool
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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 oid.Address) {
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if p != nil {
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p.addr = addr
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}
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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) {
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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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}
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// WithIgnoreMeta is a Get option try to fetch object from blobstor directly,
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// without accessing metabase.
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func (p *RngPrm) WithIgnoreMeta(ignore bool) {
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p.skipMeta = ignore
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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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// HasMeta returns true if info about the object was found in the metabase.
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func (r RngRes) HasMeta() bool {
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return r.hasMeta
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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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//
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// Returns ErrRangeOutOfBounds if the requested object range is out of bounds.
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// Returns an error of type apistatus.ObjectNotFound if the requested object is missing.
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// Returns an error of type apistatus.ObjectAlreadyRemoved if the requested object has been marked as removed in shard.
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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 := object.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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var getRngBigPrm 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.New()
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obj.SetPayload(res.RangeData())
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return obj, nil
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}
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small = func(stor *blobstor.BlobStor, id *blobovnicza.ID) (*object.Object, error) {
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var getRngSmallPrm 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.New()
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obj.SetPayload(res.RangeData())
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return obj, nil
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}
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obj, hasMeta, err := s.fetchObjectData(prm.addr, prm.skipMeta, big, small)
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return RngRes{
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obj: obj,
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hasMeta: hasMeta,
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}, err
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}
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