forked from TrueCloudLab/frostfs-node
80 lines
2 KiB
Go
80 lines
2 KiB
Go
package searchsvc
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import (
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"context"
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"io"
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"github.com/nspcc-dev/neofs-api-go/pkg/object"
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"github.com/nspcc-dev/neofs-node/pkg/services/object/search/query"
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queryV1 "github.com/nspcc-dev/neofs-node/pkg/services/object/search/query/v1"
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"github.com/nspcc-dev/neofs-node/pkg/services/object/util"
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"github.com/pkg/errors"
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)
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type RelationSearcher struct {
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svc *Service
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queryGenerator func(*object.Address) query.Query
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}
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var ErrRelationNotFound = errors.New("relation not found")
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func (s *RelationSearcher) SearchRelation(ctx context.Context, addr *object.Address, prm *util.CommonPrm) (*object.ID, error) {
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streamer, err := s.svc.Search(ctx, new(Prm).
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WithContainerID(addr.ContainerID()).WithCommonPrm(prm).
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WithSearchQuery(s.queryGenerator(addr)),
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)
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if err != nil {
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return nil, errors.Wrapf(err, "(%T) could not create search streamer", s)
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}
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res, err := readFullStream(streamer, 1)
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if err != nil {
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return nil, errors.Wrapf(err, "(%T) could not read full search stream", s)
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} else if ln := len(res); ln != 1 {
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if ln == 0 {
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return nil, ErrRelationNotFound
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}
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return nil, errors.Errorf("(%T) unexpected amount of found objects %d", s, ln)
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}
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return res[0], nil
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}
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func readFullStream(s *Streamer, cap int) ([]*object.ID, error) {
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res := make([]*object.ID, 0, cap)
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for {
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r, err := s.Recv()
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if err != nil {
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if errors.Is(errors.Cause(err), io.EOF) {
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break
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}
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return nil, errors.Wrapf(err, "(%s) could not receive search result", "readFullStream")
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}
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res = append(res, r.IDList()...)
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}
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return res, nil
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}
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func NewRightChildSearcher(svc *Service) *RelationSearcher {
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return &RelationSearcher{
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svc: svc,
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queryGenerator: func(addr *object.Address) query.Query {
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return queryV1.NewRightChildQuery(addr.ObjectID())
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},
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}
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}
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func NewLinkingSearcher(svc *Service) *RelationSearcher {
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return &RelationSearcher{
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svc: svc,
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queryGenerator: func(addr *object.Address) query.Query {
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return queryV1.NewLinkingQuery(addr.ObjectID())
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},
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}
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}
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