From 3bba05ff61932be47cceed2bcd39b6a134f3e3c5 Mon Sep 17 00:00:00 2001
From: Lennart Heinrich <lennart.heinrich@edu.fhdw.de>
Date: Fri, 21 Nov 2025 22:05:11 +0100
Subject: [PATCH] messaging sequence diagram

---
 plantuml/messaging-sequence.puml | 104 +++++++++++++++++++++++++++++++
 1 file changed, 104 insertions(+)
 create mode 100644 plantuml/messaging-sequence.puml

diff --git a/plantuml/messaging-sequence.puml b/plantuml/messaging-sequence.puml
new file mode 100644
index 0000000..bd7a67e
--- /dev/null
+++ b/plantuml/messaging-sequence.puml
@@ -0,0 +1,104 @@
+@startuml Messaging Sequenzdiagramm
+
+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
+
+group "Persistence: Request verarbeiten und Response produzieren"
+
+Transaction -> CommandWrapper : process(cmdW)
+CommandWrapper -> Command : <<reflection>>\ndeserialize(cmdW)
+CommandWrapper <-- Command : cmd
+
+CommandWrapper -> Command : process(cmd)
+
+Command -> CDI : select(Class)
+Command <-- CDI : Processor
+
+Command -> Processor : process(cmd)
+note over Processor : Verarbeitung\ndes Commands
+Command <-- Processor : resp
+
+CommandWrapper <-- Command : resp
+Transaction <-- CommandWrapper : resp
+
+Transaction -> CommandResponse : serialize(resp).copyIds(cmdW)
+Transaction <-- CommandResponse : respW
+
+Transaction -> Interceptor : intercept(respW)
+note over Interceptor : (asynchron;\nDetails nicht\ndargestellt)
+Transaction <-- Interceptor
+
+Transaction -> Transaction : commit()
+
+Transaction -> Kafka : produce(respW)
+Transaction <-- Kafka : Ack
+
+end
+
+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
+