84 lines
2.3 KiB
Go
84 lines
2.3 KiB
Go
package tsourse
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import (
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"context"
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"errors"
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"fmt"
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getsvc "github.com/TrueCloudLab/frostfs-node/pkg/services/object/get"
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"github.com/TrueCloudLab/frostfs-node/pkg/services/object/util"
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apistatus "github.com/TrueCloudLab/frostfs-sdk-go/client/status"
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"github.com/TrueCloudLab/frostfs-sdk-go/object"
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objectSDK "github.com/TrueCloudLab/frostfs-sdk-go/object"
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oid "github.com/TrueCloudLab/frostfs-sdk-go/object/id"
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)
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// Source represents wrapper over the object service that
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// allows checking if a tombstone is available in NeoFS
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// network.
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//
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// Must be created via NewSource function. `var` and `Source{}`
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// declarations leads to undefined behaviour and may lead
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// to panics.
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type Source struct {
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s *getsvc.Service
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}
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// TombstoneSourcePrm groups required parameters for Source creation.
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type TombstoneSourcePrm struct {
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s *getsvc.Service
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}
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// SetGetService sets object service.
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func (s *TombstoneSourcePrm) SetGetService(v *getsvc.Service) {
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s.s = v
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}
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// NewSource creates, initialize and returns local tombstone Source.
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// The returned structure is ready to use.
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//
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// Panics if any of the provided options does not allow
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// constructing a valid tombstone local Source.
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func NewSource(p TombstoneSourcePrm) Source {
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if p.s == nil {
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panic("Tombstone source: nil object service")
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}
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return Source(p)
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}
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type headerWriter struct {
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o *objectSDK.Object
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}
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func (h *headerWriter) WriteHeader(o *objectSDK.Object) error {
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h.o = o
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return nil
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}
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// Tombstone checks if the engine stores tombstone.
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// Returns nil, nil if the tombstone has been removed
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// or marked for removal.
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func (s Source) Tombstone(ctx context.Context, a oid.Address, _ uint64) (*object.Object, error) {
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var hr headerWriter
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var headPrm getsvc.HeadPrm
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headPrm.WithAddress(a)
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headPrm.SetHeaderWriter(&hr)
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headPrm.SetCommonParameters(&util.CommonPrm{}) // default values are ok for that operation
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err := s.s.Head(ctx, headPrm)
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switch {
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case errors.As(err, new(apistatus.ObjectNotFound)) || errors.As(err, new(apistatus.ObjectAlreadyRemoved)):
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return nil, nil
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case err != nil:
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return nil, fmt.Errorf("could not get tombstone from the source: %w", err)
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default:
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}
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if hr.o.Type() != objectSDK.TypeTombstone {
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return nil, fmt.Errorf("returned %s object is not a tombstone", a)
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}
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return hr.o, nil
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}
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