X-Git-Url: https://juplo.de/gitweb/?a=blobdiff_plain;f=src%2Fmain%2Fjava%2Fde%2Fjuplo%2Fkafka%2FSumBusinessLogic.java;h=27ddebb8b4e1a2bf8d62869337244cec75ebb1b5;hb=5f35354fd694f78599d66ee9e01fb4c0d89cc5bb;hp=38485d259162b3e3b1ac6f84f9510e2e8ec404f7;hpb=d8a6e834cd82b2dbad257348932837032b2ae100;p=demos%2Fkafka%2Ftraining

diff --git a/src/main/java/de/juplo/kafka/SumBusinessLogic.java b/src/main/java/de/juplo/kafka/SumBusinessLogic.java
index 38485d2..27ddebb 100644
--- a/src/main/java/de/juplo/kafka/SumBusinessLogic.java
+++ b/src/main/java/de/juplo/kafka/SumBusinessLogic.java
@@ -34,6 +34,17 @@ public class SumBusinessLogic
     return Optional.ofNullable(state.get(user));
   }
 
+  public synchronized void addToSum(String user, Integer value)
+  {
+    if (!state.containsKey(user))
+      throw new IllegalStateException("No sumation for " + user + " in progress");
+    if (value == null || value < 1)
+      throw new IllegalArgumentException("Not a positive number: " + value);
+
+    long result = state.get(user) + value;
+    state.put(user, result);
+  }
+
   public synchronized Long endSum(String user)
   {
     if (!state.containsKey(user))
@@ -41,4 +52,9 @@ public class SumBusinessLogic
 
     return state.get(user);
   }
+
+  protected Map<String, Long> getState()
+  {
+    return state;
+  }
 }