X-Git-Url: https://juplo.de/gitweb/?a=blobdiff_plain;f=src%2Fmain%2Fjava%2Fde%2Fjuplo%2Fkafka%2FAdderBusinessLogic.java;h=ecd9590de696b14501145682be4dbd58a0b6c955;hb=d576eea9bc9208d9e5003bd8c8c132bed96b5c40;hp=549228ce656075a5f6445b0fabe4066aefb98d8d;hpb=f4848341ef2fee62e3c62c63deed277a4f1a2d8a;p=demos%2Fkafka%2Ftraining

diff --git a/src/main/java/de/juplo/kafka/AdderBusinessLogic.java b/src/main/java/de/juplo/kafka/AdderBusinessLogic.java
index 549228c..ecd9590 100644
--- a/src/main/java/de/juplo/kafka/AdderBusinessLogic.java
+++ b/src/main/java/de/juplo/kafka/AdderBusinessLogic.java
@@ -22,21 +22,32 @@ public class AdderBusinessLogic
   }
 
 
-  public synchronized void startSum(String user)
+  public synchronized Optional<Long> getSum(String user)
+  {
+    return Optional.ofNullable(state.get(user));
+  }
+
+  public synchronized void addToSum(String user, Integer value)
   {
-    if (state.containsKey(user))
-      throw new IllegalStateException("Sumation for " + user + " already in progress, state: " + state.get(user));
+    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);
 
-    state.put(user, 0l);
+    long result = state.get(user) + value;
+    state.put(user, result);
   }
 
-  public synchronized Optional<Long> getSum(String user)
+  public synchronized Long calculate(String user)
   {
-    return Optional.ofNullable(state.get(user));
+    if (!state.containsKey(user))
+      throw new IllegalStateException("No sumation for " + user + " in progress");
+
+    return state.remove(user);
   }
 
-  public synchronized Long endSum(String user)
+  protected Map<String, Long> getState()
   {
-    return null;
+    return state;
   }
 }