Version des `EndlessProducer`, der Nachrichten vom Typ `Long` schreibt

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

diff --git a/src/main/java/de/juplo/kafka/EndlessProducer.java b/src/main/java/de/juplo/kafka/EndlessProducer.java
index 7a5b324..9c69f31 100644 (file)
--- a/src/main/java/de/juplo/kafka/EndlessProducer.java
+++ b/src/main/java/de/juplo/kafka/EndlessProducer.java
@@ -3,6 +3,7 @@ package de.juplo.kafka;
 import lombok.extern.slf4j.Slf4j;
 import org.apache.kafka.clients.producer.KafkaProducer;
 import org.apache.kafka.clients.producer.ProducerRecord;
+import org.apache.kafka.common.serialization.LongSerializer;
 import org.apache.kafka.common.serialization.StringSerializer;
 
 import javax.annotation.PreDestroy;
@@ -18,7 +19,7 @@ public class EndlessProducer implements Runnable
   private final String id;
   private final String topic;
   private final int throttleMs;
-  private final KafkaProducer<String, String> producer;
+  private final KafkaProducer<String, Long> producer;
 
   private boolean running = false;
   private long i = 0;
@@ -42,7 +43,7 @@ public class EndlessProducer implements Runnable
     props.put("client.id", clientId);
     props.put("acks", acks);
     props.put("key.serializer", StringSerializer.class.getName());
-    props.put("value.serializer", StringSerializer.class.getName());
+    props.put("value.serializer", LongSerializer.class.getName());
 
     this.producer = new KafkaProducer<>(props);
   }
@@ -54,7 +55,7 @@ public class EndlessProducer implements Runnable
     {
       for (; running; i++)
       {
-        send(Long.toString(i%10), Long.toString(i));
+        send(Long.toString(i%10), i);
 
         if (throttleMs > 0)
         {
@@ -85,11 +86,11 @@ public class EndlessProducer implements Runnable
     }
   }
 
-  void send(String key, String value)
+  void send(String key, Long value)
   {
     final long time = System.currentTimeMillis();
 
-    final ProducerRecord<String, String> record = new ProducerRecord<>(
+    final ProducerRecord<String, Long> record = new ProducerRecord<>(
         topic,  // Topic
         key,    // Key
         value   // Value