Run starts a loop to keep running Sync(). This method blocks until the ctx is canceled.
(ctx context.Context)
| 66 | // Run starts a loop to keep running Sync(). |
| 67 | // This method blocks until the ctx is canceled. |
| 68 | func (writer *SyncWriter) Run(ctx context.Context) error { |
| 69 | pollingTicker := time.Tick(eventPollingTime) |
| 70 | committed := transactionCommitInformer() |
| 71 | |
| 72 | recentlySynced := false |
| 73 | for { |
| 74 | err := func() error { |
| 75 | lost, err := writer.sync.Lock(syncPath, true) |
| 76 | if err != nil { |
| 77 | return err |
| 78 | } |
| 79 | defer writer.sync.Unlock(syncPath) |
| 80 | |
| 81 | for { |
| 82 | select { |
| 83 | case <-lost: |
| 84 | return fmt.Errorf("lost lock for sync") |
| 85 | case <-ctx.Done(): |
| 86 | return nil |
| 87 | case <-pollingTicker: |
| 88 | if recentlySynced { |
| 89 | recentlySynced = false |
| 90 | continue |
| 91 | } |
| 92 | case <-committed: |
| 93 | recentlySynced = true |
| 94 | } |
| 95 | _, err := writer.Sync() |
| 96 | if err != nil { |
| 97 | return err |
| 98 | } |
| 99 | } |
| 100 | }() |
| 101 | |
| 102 | if err != nil { |
| 103 | log.Error("sync writer is intrupted: %s", err) |
| 104 | } |
| 105 | |
| 106 | select { |
| 107 | case <-ctx.Done(): |
| 108 | return ctx.Err() |
| 109 | case <-time.After(writer.backoff): |
| 110 | } |
| 111 | } |
| 112 | } |
| 113 | |
| 114 | // Sync runs a synchronization iteration, which |
| 115 | // executes requests in the event table. |