71 lines
1.4 KiB
Go
71 lines
1.4 KiB
Go
package main
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import (
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"encoding/gob"
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"fmt"
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"os"
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"time"
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)
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type DiskStorage struct {
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stateFile string
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lastSave int64
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LastSaves map[CartId]int64
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}
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func NewDiskStorage(stateFile string) (*DiskStorage, error) {
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ret := &DiskStorage{
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stateFile: stateFile,
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LastSaves: make(map[CartId]int64),
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}
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err := ret.loadState()
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return ret, err
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}
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func saveMessages(_ interface{}, _ CartId) error {
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// No-op: legacy event log persistence removed in oneof refactor.
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return nil
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}
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func getCartPath(id string) string {
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return fmt.Sprintf("data/%s.prot", id)
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}
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func loadMessages(_ Grain, _ CartId) error {
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// No-op: legacy replay removed in oneof refactor.
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return nil
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}
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func (s *DiskStorage) saveState() error {
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tmpFile := s.stateFile + "_tmp"
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file, err := os.Create(tmpFile)
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if err != nil {
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return err
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}
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defer file.Close()
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err = gob.NewEncoder(file).Encode(s.LastSaves)
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if err != nil {
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return err
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}
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os.Remove(s.stateFile + ".bak")
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os.Rename(s.stateFile, s.stateFile+".bak")
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return os.Rename(tmpFile, s.stateFile)
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}
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func (s *DiskStorage) loadState() error {
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file, err := os.Open(s.stateFile)
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if err != nil {
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return err
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}
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defer file.Close()
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return gob.NewDecoder(file).Decode(&s.LastSaves)
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}
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func (s *DiskStorage) Store(id CartId, _ *CartGrain) error {
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// With the removal of the legacy message log, we only update the timestamp.
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ts := time.Now().Unix()
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s.LastSaves[id] = ts
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s.lastSave = ts
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return nil
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}
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