fix: GREEN - Correct handling of unknown chat-rooms in the Kafka-version

[demos/kafka/chat] / src / main / java / de / juplo / kafka / chat / backend / persistence / kafka / KafkaChatHome.java

diff --git a/src/main/java/de/juplo/kafka/chat/backend/persistence/kafka/KafkaChatHome.java b/src/main/java/de/juplo/kafka/chat/backend/persistence/kafka/KafkaChatHome.java
index 6799040..ab72269 100644 (file)
--- a/src/main/java/de/juplo/kafka/chat/backend/persistence/kafka/KafkaChatHome.java
+++ b/src/main/java/de/juplo/kafka/chat/backend/persistence/kafka/KafkaChatHome.java
@@ -2,6 +2,7 @@ package de.juplo.kafka.chat.backend.persistence.kafka;
 
 import de.juplo.kafka.chat.backend.domain.ChatHome;
 import de.juplo.kafka.chat.backend.domain.ChatRoom;
+import de.juplo.kafka.chat.backend.domain.UnknownChatroomException;
 import lombok.RequiredArgsConstructor;
 import lombok.extern.slf4j.Slf4j;
 import org.apache.kafka.common.utils.Utils;
@@ -23,7 +24,9 @@ public class KafkaChatHome implements ChatHome
   public Mono<ChatRoom> getChatRoom(UUID id)
   {
     int shard = selectShard(id);
-    return chatRoomChannel.getChatRoom(shard, id);
+    return chatRoomChannel
+        .getChatRoom(shard, id)
+        .switchIfEmpty(Mono.error(() -> new UnknownChatroomException(id)));
   }
 
   int selectShard(UUID chatRoomId)