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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,37 @@ | ||
| package event | ||
|
|
||
| import ( | ||
| "context" | ||
| "encoding/json" | ||
| "os" | ||
| "path/filepath" | ||
| ) | ||
|
|
||
| const TypeSeparator = "_" | ||
|
|
||
| type FilePublisher[T Identifiable] struct { | ||
| Dir string | ||
| } | ||
|
|
||
| func (mp *FilePublisher[T]) Publish(_ context.Context, event T) error { | ||
| err := os.MkdirAll(mp.Dir, 0750) | ||
| if err != nil && !os.IsExist(err) { | ||
| return err | ||
| } | ||
|
|
||
| filename := filepath.Join(mp.Dir, event.Identifier()+TypeSeparator+event.Type()) | ||
| f, err := os.OpenFile(filename, os.O_APPEND|os.O_CREATE|os.O_WRONLY, 0644) | ||
| if err != nil { | ||
| return err | ||
| } | ||
| defer f.Close() | ||
|
|
||
| // write event to file. | ||
| encoder := json.NewEncoder(f) | ||
| err = encoder.Encode(event) | ||
| if err != nil { | ||
| return err | ||
| } | ||
|
|
||
| return nil | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,95 @@ | ||
| package event | ||
|
|
||
| import ( | ||
| "context" | ||
| "errors" | ||
| "fmt" | ||
| "log/slog" | ||
|
|
||
| "github.com/cdcgov/data-exchange-upload/upload-server/internal/models" | ||
| ) | ||
|
|
||
| var FileReadyChan chan *FileReady | ||
|
|
||
| func InitFileReadyChannel() { | ||
| FileReadyChan = make(chan *FileReady) | ||
| } | ||
|
|
||
| func CloseFileReadyChannel() { | ||
| close(FileReadyChan) | ||
| } | ||
|
|
||
| func GetChannel[T Identifiable]() (chan T, error) { | ||
| if r, ok := any(FileReadyChan).(chan T); ok { | ||
| return r, nil | ||
| } | ||
|
|
||
| return nil, fmt.Errorf("channel not found") | ||
| } | ||
|
|
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| type MemorySubscriber[T Identifiable] struct { | ||
| Chan chan T | ||
| } | ||
|
|
||
| func (ms *MemorySubscriber[T]) GetBatch(ctx context.Context, _ int) ([]T, error) { | ||
| select { | ||
| case <-ctx.Done(): | ||
| return nil, nil | ||
| case evt := <-ms.Chan: | ||
| return []T{evt}, nil | ||
| } | ||
| } | ||
|
|
||
| func (ms *MemorySubscriber[T]) HandleSuccess(_ context.Context, e T) error { | ||
| slog.Info("successfully handled event", "event", e) | ||
| return nil | ||
| } | ||
|
|
||
| func (ms *MemorySubscriber[T]) HandleError(_ context.Context, e T, err error) error { | ||
| slog.Error("failed to handle event", "event", e, "error", err.Error()) | ||
| if e.RetryCount() < MaxRetries { | ||
| e.IncrementRetryCount() | ||
| // Retrying in a separate go routine so this doesn't block on channel write. | ||
| go func() { | ||
| ms.Chan <- e | ||
| }() | ||
| } | ||
| return nil | ||
| } | ||
|
|
||
| func (ms *MemorySubscriber[T]) Close() error { | ||
| slog.Info("closing in-memory subscriber") | ||
| return nil | ||
| } | ||
|
|
||
| func (ms *MemorySubscriber[T]) Health(_ context.Context) (rsp models.ServiceHealthResp) { | ||
| rsp.Service = "Memory Subscriber" | ||
| rsp.Status = models.STATUS_UP | ||
| rsp.HealthIssue = models.HEALTH_ISSUE_NONE | ||
| return rsp | ||
| } | ||
|
|
||
| type MemoryPublisher[T Identifiable] struct { | ||
| Chan chan T | ||
| } | ||
|
|
||
| func (mp *MemoryPublisher[T]) Publish(_ context.Context, event T) error { | ||
| if mp.Chan != nil { | ||
| go func() { | ||
| mp.Chan <- event | ||
| }() | ||
| return nil | ||
| } | ||
| return errors.New("No event channel found") | ||
| } | ||
|
|
||
| func (mp *MemoryPublisher[T]) Close() error { | ||
| return nil | ||
| } | ||
|
|
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| func (mp *MemoryPublisher[T]) Health(_ context.Context) (rsp models.ServiceHealthResp) { | ||
| rsp.Service = "Memory Publisher" | ||
| rsp.Status = models.STATUS_UP | ||
| rsp.HealthIssue = models.HEALTH_ISSUE_NONE | ||
| return rsp | ||
| } |
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