forked from TrueCloudLab/frostfs-node
85 lines
2.3 KiB
Go
85 lines
2.3 KiB
Go
package shard
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import (
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"context"
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"git.frostfs.info/TrueCloudLab/frostfs-node/pkg/local_object_storage/blobstor/common"
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meta "git.frostfs.info/TrueCloudLab/frostfs-node/pkg/local_object_storage/metabase"
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"git.frostfs.info/TrueCloudLab/frostfs-observability/tracing"
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oid "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/object/id"
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"go.opentelemetry.io/otel/attribute"
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"go.opentelemetry.io/otel/trace"
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)
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// ExistsPrm groups the parameters of Exists operation.
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type ExistsPrm struct {
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// Exists option to set object checked for existence.
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Address oid.Address
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// Exists option to set parent object checked for existence.
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ParentAddress oid.Address
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}
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// ExistsRes groups the resulting values of Exists operation.
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type ExistsRes struct {
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ex bool
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lc bool
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}
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// Exists returns the fact that the object is in the shard.
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func (p ExistsRes) Exists() bool {
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return p.ex
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}
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// Locked returns the fact that the object is locked.
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func (p ExistsRes) Locked() bool {
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return p.lc
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}
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// Exists checks if object is presented in shard.
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//
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// Returns any error encountered that does not allow to
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// unambiguously determine the presence of an object.
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//
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// Returns an error of type apistatus.ObjectAlreadyRemoved if object has been marked as removed.
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// Returns the object.ErrObjectIsExpired if the object is presented but already expired.
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// Returns the ErrShardDisabled if the shard is disabled.
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func (s *Shard) Exists(ctx context.Context, prm ExistsPrm) (ExistsRes, error) {
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ctx, span := tracing.StartSpanFromContext(ctx, "Shard.Exists",
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trace.WithAttributes(
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attribute.String("shard_id", s.ID().String()),
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attribute.String("address", prm.Address.EncodeToString()),
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))
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defer span.End()
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var exists bool
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var locked bool
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var err error
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s.m.RLock()
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defer s.m.RUnlock()
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if s.info.Mode.Disabled() {
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return ExistsRes{}, ErrShardDisabled
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} else if s.info.Mode.NoMetabase() {
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var p common.ExistsPrm
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p.Address = prm.Address
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var res common.ExistsRes
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res, err = s.blobStor.Exists(ctx, p)
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exists = res.Exists
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} else {
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var existsPrm meta.ExistsPrm
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existsPrm.SetAddress(prm.Address)
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existsPrm.SetParent(prm.ParentAddress)
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var res meta.ExistsRes
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res, err = s.metaBase.Exists(ctx, existsPrm)
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exists = res.Exists()
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locked = res.Locked()
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}
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return ExistsRes{
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ex: exists,
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lc: locked,
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}, err
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}
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