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event more eventhub improvements (#461)
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,95 @@ | ||
| package conneventhub | ||
|
|
||
| import ( | ||
| "fmt" | ||
| "strings" | ||
|
|
||
| azeventhubs "github.com/Azure/azure-sdk-for-go/sdk/messaging/azeventhubs" | ||
| ) | ||
|
|
||
| // multimap from ScopedEventhub to *azeventhubs.EventDataBatch | ||
| type HubBatches struct { | ||
| batches map[ScopedEventhub][]*azeventhubs.EventDataBatch | ||
| manager *EventHubManager | ||
| } | ||
|
|
||
| func NewHubBatches(manager *EventHubManager) *HubBatches { | ||
| return &HubBatches{ | ||
| batches: make(map[ScopedEventhub][]*azeventhubs.EventDataBatch), | ||
| manager: manager, | ||
| } | ||
| } | ||
|
|
||
| func (h *HubBatches) AddEvent(name ScopedEventhub, event string) error { | ||
| batches, ok := h.batches[name] | ||
| if !ok { | ||
| batches = []*azeventhubs.EventDataBatch{} | ||
| } | ||
|
|
||
| if len(batches) == 0 { | ||
| newBatch, err := h.manager.CreateEventDataBatch(name) | ||
| if err != nil { | ||
| return err | ||
| } | ||
| batches = append(batches, newBatch) | ||
| } | ||
|
|
||
| if err := tryAddEventToBatch(event, batches[len(batches)-1]); err != nil { | ||
| if strings.Contains(err.Error(), "too large for the batch") { | ||
| overflowBatch, err := h.handleBatchOverflow(name, event) | ||
| if err != nil { | ||
| return fmt.Errorf("failed to handle batch overflow: %v", err) | ||
| } | ||
| batches = append(batches, overflowBatch) | ||
| } else { | ||
| return fmt.Errorf("failed to add event data: %v", err) | ||
| } | ||
| } | ||
|
|
||
| h.batches[name] = batches | ||
| return nil | ||
| } | ||
|
|
||
| func (h *HubBatches) handleBatchOverflow( | ||
| name ScopedEventhub, | ||
| event string, | ||
| ) (*azeventhubs.EventDataBatch, error) { | ||
| newBatch, err := h.manager.CreateEventDataBatch(name) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
| if err := tryAddEventToBatch(event, newBatch); err != nil { | ||
| return nil, fmt.Errorf("failed to add event data to new batch: %v", err) | ||
| } | ||
| return newBatch, nil | ||
| } | ||
|
|
||
| func (h *HubBatches) Len() int { | ||
| return len(h.batches) | ||
| } | ||
|
|
||
| // ForEach calls the given function for each ScopedEventhub and batch pair | ||
| func (h *HubBatches) ForEach(fn func(ScopedEventhub, *azeventhubs.EventDataBatch)) { | ||
| for name, batches := range h.batches { | ||
| for _, batch := range batches { | ||
| fn(name, batch) | ||
| } | ||
| } | ||
| } | ||
|
|
||
| // Clear removes all batches from the HubBatches | ||
| func (h *HubBatches) Clear() { | ||
| h.batches = make(map[ScopedEventhub][]*azeventhubs.EventDataBatch) | ||
| } | ||
|
|
||
| func tryAddEventToBatch(event string, batch *azeventhubs.EventDataBatch) error { | ||
| eventData := eventDataFromString(event) | ||
| opts := &azeventhubs.AddEventDataOptions{} | ||
| return batch.AddEventData(eventData, opts) | ||
| } | ||
|
|
||
| func eventDataFromString(s string) *azeventhubs.EventData { | ||
| return &azeventhubs.EventData{ | ||
| Body: []byte(s), | ||
| } | ||
| } |