frostfs-node/pkg/local_object_storage/shard/select.go

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package shard
import (
"fmt"
meta "github.com/TrueCloudLab/frostfs-node/pkg/local_object_storage/metabase"
cid "github.com/TrueCloudLab/frostfs-sdk-go/container/id"
"github.com/TrueCloudLab/frostfs-sdk-go/object"
oid "github.com/TrueCloudLab/frostfs-sdk-go/object/id"
)
// SelectPrm groups the parameters of Select operation.
type SelectPrm struct {
cnr cid.ID
filters object.SearchFilters
}
// SelectRes groups the resulting values of Select operation.
type SelectRes struct {
addrList []oid.Address
}
// SetContainerID is a Select option to set the container id to search in.
func (p *SelectPrm) SetContainerID(cnr cid.ID) {
p.cnr = cnr
}
// SetFilters is a Select option to set the object filters.
func (p *SelectPrm) SetFilters(fs object.SearchFilters) {
p.filters = fs
}
// AddressList returns list of addresses of the selected objects.
func (r SelectRes) AddressList() []oid.Address {
return r.addrList
}
// Select selects the objects from shard that match select parameters.
//
// Returns any error encountered that
// did not allow to completely select the objects.
func (s *Shard) Select(prm SelectPrm) (SelectRes, error) {
s.m.RLock()
defer s.m.RUnlock()
if s.info.Mode.NoMetabase() {
return SelectRes{}, ErrDegradedMode
}
var selectPrm meta.SelectPrm
selectPrm.SetFilters(prm.filters)
selectPrm.SetContainerID(prm.cnr)
mRes, err := s.metaBase.Select(selectPrm)
if err != nil {
return SelectRes{}, fmt.Errorf("could not select objects from metabase: %w", err)
}
return SelectRes{
addrList: mRes.AddressList(),
}, nil
}