From: Kai Moritz <kai@juplo.de>
Date: Sat, 13 Aug 2022 13:19:54 +0000 (+0200)
Subject: GRÜN: Erwartungen implementiert
X-Git-Tag: sumup-adder---lvm-2-tage~33
X-Git-Url: http://juplo.de/gitweb/?a=commitdiff_plain;h=47657918b484fad60ac4062177cfeb569275d3d3;p=demos%2Fkafka%2Ftraining

GRÜN: Erwartungen implementiert
---

diff --git a/src/main/java/de/juplo/kafka/AdderBusinessLogic.java b/src/main/java/de/juplo/kafka/AdderBusinessLogic.java
index 2e3d126..a3848c4 100644
--- a/src/main/java/de/juplo/kafka/AdderBusinessLogic.java
+++ b/src/main/java/de/juplo/kafka/AdderBusinessLogic.java
@@ -1,13 +1,31 @@
 package de.juplo.kafka;
 
 
+import java.util.HashMap;
+import java.util.Map;
+
+
 public class AdderBusinessLogic
 {
+  private final Map<String, Long> state;
+
+
   public AdderBusinessLogic()
   {
+    this(new HashMap<>());
   }
 
+  public AdderBusinessLogic(Map<String, Long> state)
+  {
+    this.state = state;
+  }
+
+
   public synchronized void startSum(String user)
   {
+    if (state.containsKey(user))
+      throw new IllegalStateException("Sumation for " + user + " already in progress, state: " + state.get(user));
+
+    state.put(user, 0l);
   }
 }