add support for recovery section in event streams (#2421)

pkg/cluster/streams.go

@@ -145,11 +145,13 @@ func (c *Cluster) generateFabricEventStream(appId string) *zalandov1.FabricEvent
 			streamSource := c.getEventStreamSource(stream, tableName, table.IdColumn)
 			streamFlow := getEventStreamFlow(stream, table.PayloadColumn)
 			streamSink := getEventStreamSink(stream, table.EventType)
+			streamRecovery := getEventStreamRecovery(stream, table.RecoveryEventType, table.EventType)
 
 			eventStreams = append(eventStreams, zalandov1.EventStream{
-				EventStreamFlow:   streamFlow,
-				EventStreamSink:   streamSink,
-				EventStreamSource: streamSource})
+				EventStreamFlow:     streamFlow,
+				EventStreamRecovery: streamRecovery,
+				EventStreamSink:     streamSink,
+				EventStreamSource:   streamSource})
 		}
 	}
 
@@ -204,6 +206,28 @@ func getEventStreamSink(stream acidv1.Stream, eventType string) zalandov1.EventS
 	}
 }
 
+func getEventStreamRecovery(stream acidv1.Stream, recoveryEventType, eventType string) zalandov1.EventStreamRecovery {
+	if (stream.EnableRecovery != nil && !*stream.EnableRecovery) ||
+		(stream.EnableRecovery == nil && recoveryEventType == "") {
+		return zalandov1.EventStreamRecovery{
+			Type: constants.EventStreamRecoveryNoneType,
+		}
+	}
+
+	if stream.EnableRecovery != nil && *stream.EnableRecovery && recoveryEventType == "" {
+		recoveryEventType = fmt.Sprintf("%s-%s", eventType, constants.EventStreamRecoverySuffix)
+	}
+
+	return zalandov1.EventStreamRecovery{
+		Type: constants.EventStreamRecoveryDLQType,
+		Sink: &zalandov1.EventStreamSink{
+			Type:         constants.EventStreamSinkNakadiType,
+			EventType:    recoveryEventType,
+			MaxBatchSize: stream.BatchSize,
+		},
+	}
+}
+
 func getTableSchema(fullTableName string) (tableName, schemaName string) {
 	schemaName = "public"
 	tableName = fullTableName
@@ -381,7 +405,8 @@ func sameStreams(curEventStreams, newEventStreams []zalandov1.EventStream) (matc
 		for _, curStream := range curEventStreams {
 			if reflect.DeepEqual(newStream.EventStreamSource, curStream.EventStreamSource) &&
 				reflect.DeepEqual(newStream.EventStreamFlow, curStream.EventStreamFlow) &&
-				reflect.DeepEqual(newStream.EventStreamSink, curStream.EventStreamSink) {
+				reflect.DeepEqual(newStream.EventStreamSink, curStream.EventStreamSink) &&
+				reflect.DeepEqual(newStream.EventStreamRecovery, curStream.EventStreamRecovery) {
 				match = true
 				break
 			}