WIP

[demos/kafka/training] / src / main / java / de / juplo / kafka / SumRecordHandler.java

diff --git a/src/main/java/de/juplo/kafka/SumRecordHandler.java b/src/main/java/de/juplo/kafka/SumRecordHandler.java
index 82ada38..d4ec38f 100644 (file)
--- a/src/main/java/de/juplo/kafka/SumRecordHandler.java
+++ b/src/main/java/de/juplo/kafka/SumRecordHandler.java
@@ -4,17 +4,14 @@ import lombok.extern.slf4j.Slf4j;
 import org.apache.kafka.clients.consumer.ConsumerRecord;
 
 import java.util.HashMap;
+import java.util.List;
 import java.util.Map;
-import java.util.regex.Pattern;
-
 
 @Slf4j
 public class SumRecordHandler implements RecordHandler<String, String>
 {
-  final static Pattern PATTERN = Pattern.compile("\\W+");
-
-
-  private final Map<Integer, Map<String, Map<String, Long>>> seen = new HashMap<>();
+  private final Map<Integer, Map<String, List<Long>>> seen = new HashMap<>();
+  private final Map<Integer, SumBusinessLogic> state = new HashMap<>();
 
 
   @Override
@@ -22,42 +19,40 @@ public class SumRecordHandler implements RecordHandler<String, String>
   {
     Integer partition = record.partition();
     String user = record.key();
-    Map<String, Map<String, Long>> users = seen.get(partition);
-
-    Map<String, Long> words = users.get(user);
-    if (words == null)
-    {
-      words = new HashMap<>();
-      users.put(user, words);
-    }
-
-    for (String word : PATTERN.split(record.value()))
+    String message = record.value();
+    switch (message)
     {
-      Long num = words.get(word);
-      if (num == null)
-      {
-        num = 1l;
-      }
-      else
-      {
-        num++;
-      }
-      words.put(word, num);
+      case "START":
+        state.get(partition).startSum(user);
+        return;
+
+      case "END":
+        Long result = state.get(partition).endSum(user);
+        log.info("New result for {}: {}", user, result);
+        return;
+
+      default:
+        state.get(partition).addToSum(user, Integer.parseInt(message));
+        return;
     }
   }
 
-  public void addPartition(Integer partition, Map<String, Map<String, Long>> statistics)
+  protected void addPartition(Integer partition, StateDocument document)
   {
-    seen.put(partition, statistics);
+    this.seen.put(partition, document.seen);
+    this.state.put(partition, new SumBusinessLogic(document.state));
   }
 
-  public Map<String, Map<String, Long>> removePartition(Integer partition)
+  protected StateDocument removePartition(Integer partition)
   {
-    return seen.remove(partition);
+    return new StateDocument(
+        partition,
+        this.state.remove(partition).getState(),
+        this.seen.remove(partition));
   }
 
 
-  public Map<Integer, Map<String, Map<String, Long>>> getSeen()
+  public Map<Integer, Map<String, List<Long>>> getSeen()
   {
     return seen;
   }