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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,90 @@ | ||
| package sinks | ||
|
|
||
| import ( | ||
| "context" | ||
| "encoding/json" | ||
| "fmt" | ||
|
|
||
| "cloud.google.com/go/pubsub" | ||
| v1 "k8s.io/api/core/v1" | ||
| ) | ||
|
|
||
| type PubSubSink struct { | ||
| ProjectId string | ||
| client *pubsub.Client | ||
| topic *pubsub.Topic | ||
| deadLetter *pubsub.Topic | ||
| } | ||
|
|
||
| func NewPubSubSink(ctx context.Context, projectId string, topic string) (*PubSubSink, error) { | ||
| client, err := pubsub.NewClient(ctx, projectId) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
| clientTopic := client.Topic(topic) | ||
| ok, err := clientTopic.Exists(ctx) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
| if !ok { | ||
| return nil, fmt.Errorf("topic %s does not exist", topic) | ||
| } | ||
|
|
||
| return &PubSubSink{ | ||
| ProjectId: projectId, | ||
| topic: clientTopic, | ||
| deadLetter: nil, | ||
| }, nil | ||
| } | ||
|
|
||
| func NewPubSubSinkWithDeadLetter(ctx context.Context, projectId string, topic string, deadLetterTopic string) (*PubSubSink, error) { | ||
| ps, err := NewPubSubSink(ctx, projectId, topic) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
| clientDeadLetterTopic := ps.client.Topic(deadLetterTopic) | ||
| ok, err := clientDeadLetterTopic.Exists(ctx) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
| if !ok { | ||
| return nil, fmt.Errorf("dead-letter topic %s does not exist", deadLetterTopic) | ||
| } | ||
| ps.deadLetter = clientDeadLetterTopic | ||
| return ps, nil | ||
| } | ||
|
|
||
| func (x *PubSubSink) publishAsync(ctx context.Context, message []byte, topic *pubsub.Topic) *pubsub.PublishResult { | ||
| return topic.Publish(ctx, &pubsub.Message{ | ||
| Data: message, | ||
| }) | ||
| } | ||
|
|
||
| func (x *PubSubSink) publishSync(ctx context.Context, message []byte, topic *pubsub.Topic) (string, error) { | ||
| res := x.publishAsync(ctx, message, topic) | ||
| msgID, err := res.Get(ctx) // blocks until published | ||
| if err != nil { | ||
| return "", err | ||
| } | ||
| return msgID, nil | ||
| } | ||
|
|
||
| func (x *PubSubSink) Cleanup() { | ||
| x.topic.Stop() | ||
| if x.deadLetter != nil { | ||
| x.deadLetter.Stop() | ||
| } | ||
| } | ||
|
|
||
| // UpdateEvents implements EventSinkInterface.UpdateEvents | ||
| func (x *PubSubSink) UpdateEvents(eNew *v1.Event, eOld *v1.Event) { | ||
| eData := NewEventData(eNew, eOld) | ||
|
|
||
| if eJSONBytes, err := json.Marshal(eData); err == nil { | ||
| x.publishAsync(context.Background(), eJSONBytes, x.topic) | ||
| } else { | ||
| if x.deadLetter != nil { | ||
| x.publishAsync(context.Background(), eJSONBytes, x.deadLetter) | ||
| } | ||
| } | ||
| } |