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chore(all): migrate to service architecture with github.com/qdm12/gos…
…ervices (#743)
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,5 @@ | ||
| package backup | ||
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|
||
| type Logger interface { | ||
| Info(message string) | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,97 @@ | ||
| package backup | ||
|
|
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| import ( | ||
| "context" | ||
| "path/filepath" | ||
| "strconv" | ||
| "time" | ||
| ) | ||
|
|
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| type Service struct { | ||
| // Injected fields | ||
| backupPeriod time.Duration | ||
| dataDir string | ||
| outputDir string | ||
| logger Logger | ||
|
|
||
| // Internal fields | ||
| stopCh chan<- struct{} | ||
| done <-chan struct{} | ||
| } | ||
|
|
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| func New(backupPeriod time.Duration, | ||
| dataDir, outputDir string, logger Logger) *Service { | ||
| return &Service{ | ||
| logger: logger, | ||
| backupPeriod: backupPeriod, | ||
| dataDir: dataDir, | ||
| outputDir: outputDir, | ||
| } | ||
| } | ||
|
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| func (s *Service) String() string { | ||
| return "backup" | ||
| } | ||
|
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| func makeZipFileName() string { | ||
| return "ddns-updater-backup-" + strconv.Itoa(int(time.Now().UnixNano())) + ".zip" | ||
| } | ||
|
|
||
| func (s *Service) Start(ctx context.Context) (runError <-chan error, startErr error) { | ||
| ready := make(chan struct{}) | ||
| runErrorCh := make(chan error) | ||
| stopCh := make(chan struct{}) | ||
| s.stopCh = stopCh | ||
| done := make(chan struct{}) | ||
| s.done = done | ||
| go run(ready, runErrorCh, stopCh, done, | ||
| s.outputDir, s.dataDir, s.backupPeriod, s.logger) | ||
| select { | ||
| case <-ready: | ||
| case <-ctx.Done(): | ||
| return nil, s.Stop() | ||
| } | ||
| return runErrorCh, nil | ||
| } | ||
|
|
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| func run(ready chan<- struct{}, runError chan<- error, stopCh <-chan struct{}, | ||
| done chan<- struct{}, outputDir, dataDir string, backupPeriod time.Duration, | ||
| logger Logger) { | ||
| defer close(done) | ||
|
|
||
| if backupPeriod == 0 { | ||
| close(ready) | ||
| logger.Info("disabled") | ||
| return | ||
| } | ||
|
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| logger.Info("each " + backupPeriod.String() + | ||
| "; writing zip files to directory " + outputDir) | ||
| timer := time.NewTimer(backupPeriod) | ||
| close(ready) | ||
|
|
||
| for { | ||
| select { | ||
| case <-timer.C: | ||
| case <-stopCh: | ||
| _ = timer.Stop() | ||
| return | ||
| } | ||
| err := zipFiles( | ||
| filepath.Join(outputDir, makeZipFileName()), | ||
| filepath.Join(dataDir, "config.json"), | ||
| filepath.Join(dataDir, "updates.json"), | ||
| ) | ||
| if err != nil { | ||
| runError <- err | ||
| return | ||
| } | ||
| timer.Reset(backupPeriod) | ||
| } | ||
| } | ||
|
|
||
| func (s *Service) Stop() (err error) { | ||
| close(s.stopCh) | ||
| <-s.done | ||
| return nil | ||
| } |
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