forked from TrueCloudLab/frostfs-node
47 lines
926 B
Go
47 lines
926 B
Go
package shard
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import (
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"github.com/mr-tron/base58"
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)
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// ID represents Shard identifier.
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//
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// Each shard should have the unique ID within
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// a single instance of local storage.
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type ID []byte
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// NewIDFromBytes constructs ID from byte slice.
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func NewIDFromBytes(v []byte) *ID {
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return (*ID)(&v)
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}
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func (id ID) String() string {
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return base58.Encode(id)
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}
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// ID returns Shard identifier.
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func (s *Shard) ID() *ID {
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return s.info.ID
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}
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// UpdateID reads shard ID saved in the metabase and updates it if it is missing.
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func (s *Shard) UpdateID() (err error) {
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if err = s.metaBase.Open(); err != nil {
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return s.handleMetabaseFailure("open", err)
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}
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defer func() {
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cErr := s.metaBase.Close()
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if err == nil {
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err = cErr
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}
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}()
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id, err := s.metaBase.ReadShardID()
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if err != nil {
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return err
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}
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if len(id) != 0 {
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s.info.ID = NewIDFromBytes(id)
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return nil
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}
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return s.metaBase.WriteShardID(*s.info.ID)
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}
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