forked from TrueCloudLab/frostfs-node
64 lines
1.7 KiB
Go
64 lines
1.7 KiB
Go
package shard
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import (
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"github.com/nspcc-dev/neofs-node/pkg/local_object_storage/blobstor"
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meta "github.com/nspcc-dev/neofs-node/pkg/local_object_storage/metabase"
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"github.com/nspcc-dev/neofs-node/pkg/local_object_storage/shard/mode"
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oid "github.com/nspcc-dev/neofs-sdk-go/object/id"
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"go.uber.org/zap"
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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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addr 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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}
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// SetAddress is an Exists option to set object checked for existence.
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func (p *ExistsPrm) SetAddress(addr oid.Address) {
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p.addr = addr
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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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// 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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func (s *Shard) Exists(prm ExistsPrm) (ExistsRes, error) {
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var existsPrm meta.ExistsPrm
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existsPrm.SetAddress(prm.addr)
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res, err := s.metaBase.Exists(existsPrm)
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exists := res.Exists()
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if err != nil {
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// If the shard is in degraded mode, try to consult blobstor directly.
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// Otherwise, just return an error.
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if s.GetMode() == mode.Degraded {
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var p blobstor.ExistsPrm
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p.SetAddress(prm.addr)
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res, bErr := s.blobStor.Exists(p)
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if bErr == nil {
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exists = res.Exists()
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s.log.Warn("metabase existence check finished with error",
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zap.Stringer("address", prm.addr),
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zap.String("error", err.Error()))
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err = nil
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}
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}
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}
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return ExistsRes{
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ex: exists,
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}, err
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}
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