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Original file line number | Diff line number | Diff line change |
---|---|---|
@@ -0,0 +1,37 @@ | ||
package event | ||
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import ( | ||
"context" | ||
"encoding/json" | ||
"os" | ||
"path/filepath" | ||
) | ||
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const TypeSeparator = "_" | ||
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type FilePublisher[T Identifiable] struct { | ||
Dir string | ||
} | ||
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func (mp *FilePublisher[T]) Publish(_ context.Context, event T) error { | ||
err := os.MkdirAll(mp.Dir, 0750) | ||
if err != nil && !os.IsExist(err) { | ||
return err | ||
} | ||
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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() | ||
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// write event to file. | ||
encoder := json.NewEncoder(f) | ||
err = encoder.Encode(event) | ||
if err != nil { | ||
return err | ||
} | ||
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return nil | ||
} |
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Original file line number | Diff line number | Diff line change |
---|---|---|
@@ -0,0 +1,95 @@ | ||
package event | ||
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import ( | ||
"context" | ||
"errors" | ||
"fmt" | ||
"log/slog" | ||
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"github.com/cdcgov/data-exchange-upload/upload-server/internal/models" | ||
) | ||
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var FileReadyChan chan *FileReady | ||
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func InitFileReadyChannel() { | ||
FileReadyChan = make(chan *FileReady) | ||
} | ||
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func CloseFileReadyChannel() { | ||
close(FileReadyChan) | ||
} | ||
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func GetChannel[T Identifiable]() (chan T, error) { | ||
if r, ok := any(FileReadyChan).(chan T); ok { | ||
return r, nil | ||
} | ||
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return nil, fmt.Errorf("channel not found") | ||
} | ||
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type MemorySubscriber[T Identifiable] struct { | ||
Chan chan T | ||
} | ||
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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 | ||
} | ||
} | ||
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func (ms *MemorySubscriber[T]) HandleSuccess(_ context.Context, e T) error { | ||
slog.Info("successfully handled event", "event", e) | ||
return nil | ||
} | ||
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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 | ||
} | ||
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func (ms *MemorySubscriber[T]) Close() error { | ||
slog.Info("closing in-memory subscriber") | ||
return nil | ||
} | ||
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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 | ||
} | ||
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type MemoryPublisher[T Identifiable] struct { | ||
Chan chan T | ||
} | ||
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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") | ||
} | ||
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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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