54 lines
1.5 KiB
Go
54 lines
1.5 KiB
Go
package blobstor
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import (
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"github.com/TrueCloudLab/frostfs-node/pkg/local_object_storage/blobstor/common"
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"go.uber.org/zap"
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)
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// Exists checks if the object is presented in BLOB storage.
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//
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// Returns any error encountered that did not allow
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// to completely check object existence.
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func (b *BlobStor) Exists(prm common.ExistsPrm) (common.ExistsRes, error) {
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b.modeMtx.RLock()
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defer b.modeMtx.RUnlock()
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if prm.StorageID != nil {
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if len(prm.StorageID) == 0 {
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return b.storage[len(b.storage)-1].Storage.Exists(prm)
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}
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return b.storage[0].Storage.Exists(prm)
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}
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// If there was an error during existence check below,
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// it will be returned unless object was found in blobovnicza.
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// Otherwise, it is logged and the latest error is returned.
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// FSTree | Blobovnicza | Behaviour
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// found | (not tried) | return true, nil
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// not found | any result | return the result
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// error | found | log the error, return true, nil
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// error | not found | return the error
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// error | error | log the first error, return the second
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var errors []error
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for i := range b.storage {
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res, err := b.storage[i].Storage.Exists(prm)
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if err == nil && res.Exists {
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return res, nil
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} else if err != nil {
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errors = append(errors, err)
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}
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}
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if len(errors) == 0 {
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return common.ExistsRes{}, nil
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}
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for _, err := range errors[:len(errors)-1] {
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b.log.Warn("error occurred during object existence checking",
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zap.Stringer("address", prm.Address),
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zap.String("error", err.Error()))
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}
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return common.ExistsRes{}, errors[len(errors)-1]
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}
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