X-Git-Url: https://juplo.de/gitweb/?a=blobdiff_plain;f=src%2Fmain%2Fjava%2Fde%2Fjuplo%2Fkafka%2FApplicationRecordHandler.java;fp=src%2Fmain%2Fjava%2Fde%2Fjuplo%2Fkafka%2FApplicationRecordHandler.java;h=3492c0d4015acaee3bdedae05d939b8258ee8449;hb=61581ed5dfbb70f66390e7c3e9c261c6e6aa74d4;hp=0000000000000000000000000000000000000000;hpb=487ca1ac0c73b1c07547d5316d145ed46490ba9d;p=demos%2Fkafka%2Ftraining

diff --git a/src/main/java/de/juplo/kafka/ApplicationRecordHandler.java b/src/main/java/de/juplo/kafka/ApplicationRecordHandler.java
new file mode 100644
index 0000000..3492c0d
--- /dev/null
+++ b/src/main/java/de/juplo/kafka/ApplicationRecordHandler.java
@@ -0,0 +1,40 @@
+package de.juplo.kafka;
+
+import lombok.extern.slf4j.Slf4j;
+import org.apache.kafka.clients.consumer.ConsumerRecord;
+
+import java.util.HashMap;
+import java.util.Map;
+
+
+@Slf4j
+public class ApplicationRecordHandler implements RecordHandler<String, Long>
+{
+  private final Map<Integer, Map<String, Long>> state = new HashMap<>();
+
+
+  @Override
+  public void accept(ConsumerRecord<String, Long> record)
+  {
+    Integer partition = record.partition();
+    String key = record.key() == null ? "NULL" : record.key().toString();
+
+    if (!state.containsKey(partition))
+      state.put(partition, new HashMap<>());
+
+    Map<String, Long> byKey = state.get(partition);
+
+    if (!byKey.containsKey(key))
+      byKey.put(key, 0l);
+
+    long seenByKey = byKey.get(key);
+    seenByKey++;
+    byKey.put(key, seenByKey);
+  }
+
+
+  public Map<Integer, Map<String, Long>> getState()
+  {
+    return state;
+  }
+}