From d8a6e834cd82b2dbad257348932837032b2ae100 Mon Sep 17 00:00:00 2001
From: Kai Moritz <kai@juplo.de>
Date: Sat, 13 Aug 2022 15:35:44 +0200
Subject: [PATCH] =?utf8?q?GR=C3=9CN:=20Erwartungen=20implementiert?=
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---
 src/main/java/de/juplo/kafka/SumBusinessLogic.java | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/src/main/java/de/juplo/kafka/SumBusinessLogic.java b/src/main/java/de/juplo/kafka/SumBusinessLogic.java
index 73db4cf..38485d2 100644
--- a/src/main/java/de/juplo/kafka/SumBusinessLogic.java
+++ b/src/main/java/de/juplo/kafka/SumBusinessLogic.java
@@ -36,6 +36,9 @@ public class SumBusinessLogic
 
   public synchronized Long endSum(String user)
   {
-    return null;
+    if (!state.containsKey(user))
+      throw new IllegalStateException("No sumation for " + user + " in progress");
+
+    return state.get(user);
   }
 }
-- 
2.20.1