split messaging sequence diagram

plantuml/messaging-sequence-left.puml

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+@startuml Messaging Sequenzdiagramm Links
+
+group "Backend: Request produzieren und warten"
+
+Endpoint -> RequestReply: request(cmdW)
+
+RequestReply -> AtomicReference : <<create>>
+RequestReply <-- AtomicReference : responseRef
+
+RequestReply -> RequestReply : responses.put(\nrequestId,\nresponseRef)
+
+RequestReply -> Kafka: produce(cmdW)
+RequestReply <-- Kafka : Ack
+
+RequestReply -> AtomicReference : wait()
+
+end
+
+note over Kafka : asynchron
+
+group "Persistence: Request konsumieren und enqueuen"
+
+Quarkus -> Kafka: poll()
+Quarkus <-- Kafka: cmdW
+
+Quarkus -> CommandObserver: process(cmdW)
+
+CommandObserver -> Transaction: get(txId)
+CommandObserver <-- Transaction: tx
+
+CommandObserver -> Transaction: queue(tx, cmdW)
+CommandObserver <-- Transaction
+
+Quarkus <-- CommandObserver
+Kafka <-- Quarkus : Ack
+
+end
+
+note over Transaction : asynchron
+
+... Persistence: Request verarbeiten und Response produzieren\n(siehe weiteres Sequenzdiagramm) ...
+
+note over Kafka : asynchron
+
+group "Backend: Response konsumieren und benachrichtigen"
+
+RequestReply -> Kafka : poll()
+RequestReply <-- Kafka : respW
+
+RequestReply -> RequestReply : responses.get(requestId)
+
+RequestReply -> AtomicReference : set(respW)
+RequestReply <-- AtomicReference
+
+RequestReply -> AtomicReference : notifyAll()
+RequestReply <-- AtomicReference
+
+end
+
+note over RequestReply : asynchron
+
+group "Backend: Response zu Request zurückgeben" [synchron nach 1. Block, siehe oben]
+
+RequestReply <-- AtomicReference : wegen wait (siehe oben)
+
+RequestReply -> AtomicReference : get()
+RequestReply <-- AtomicReference : respW
+
+Endpoint <-- RequestReply : respW
+
+end
+
+@enduml
+