86 lines
1.9 KiB
Go
86 lines
1.9 KiB
Go
package engine
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import (
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"errors"
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objectSDK "github.com/nspcc-dev/neofs-api-go/pkg/object"
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"github.com/nspcc-dev/neofs-node/pkg/core/object"
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"github.com/nspcc-dev/neofs-node/pkg/local_object_storage/shard"
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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 *objectSDK.Address
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}
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// ExistsRes groups 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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// WithAddress is an Exists option to set object checked for existence.
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func (p *ExistsPrm) WithAddress(addr *objectSDK.Address) *ExistsPrm {
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if p != nil {
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p.addr = addr
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}
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return p
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}
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// Exists returns the fact that the object is in the storage engine.
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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 storage engine
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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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func (e *StorageEngine) Exists(prm *ExistsPrm) (*ExistsRes, error) {
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if e.metrics != nil {
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defer elapsed(e.metrics.AddExistsDuration)()
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}
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exists, err := e.exists(prm.addr)
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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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func (e *StorageEngine) exists(addr *objectSDK.Address) (bool, error) {
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shPrm := new(shard.ExistsPrm).WithAddress(addr)
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alreadyRemoved := false
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exists := false
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e.iterateOverSortedShards(addr, func(_ int, sh *shard.Shard) (stop bool) {
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res, err := sh.Exists(shPrm)
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if err != nil {
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if errors.Is(err, object.ErrAlreadyRemoved) {
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alreadyRemoved = true
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return true
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}
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// TODO: smth wrong with shard, need to be processed
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e.log.Warn("could not check existence of object in shard",
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zap.Stringer("shard", sh.ID()),
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zap.String("error", err.Error()),
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)
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}
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if res != nil && !exists {
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exists = res.Exists()
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}
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return false
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})
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if alreadyRemoved {
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return false, object.ErrAlreadyRemoved
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}
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return exists, nil
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}
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