fix: GREEN - Fixed NPE in `ShardedChatHome.getChatRoom()` for foreign shard

[demos/kafka/chat] / src / main / java / de / juplo / kafka / chat / backend / domain / ShardedChatHome.java

diff --git a/src/main/java/de/juplo/kafka/chat/backend/domain/ShardedChatHome.java b/src/main/java/de/juplo/kafka/chat/backend/domain/ShardedChatHome.java
index 4b8c7f1..6d2f079 100644 (file)
--- a/src/main/java/de/juplo/kafka/chat/backend/domain/ShardedChatHome.java
+++ b/src/main/java/de/juplo/kafka/chat/backend/domain/ShardedChatHome.java
@@ -40,7 +40,10 @@ public class ShardedChatHome implements ChatHome
   @Override
   public Mono<ChatRoom> getChatRoom(UUID id)
   {
-    return chatHomes[selectShard(id)].getChatRoom(id);
+    int shard = selectShard(id);
+    if (chatHomes[shard] == null)
+      throw new ShardNotOwnedException(shard);
+    return chatHomes[shard].getChatRoom(id);
   }
 
   @Override