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 cc3150e..9c69f31 100644 (file)
--- a/src/main/java/de/juplo/kafka/EndlessProducer.java
+++ b/src/main/java/de/juplo/kafka/EndlessProducer.java
@@ -3,13 +3,13 @@ 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;
 import java.util.Properties;
 import java.util.concurrent.ExecutionException;
 import java.util.concurrent.ExecutorService;
-import java.util.concurrent.Future;
 
 
 @Slf4j
@@ -19,12 +19,11 @@ 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;
   private long produced = 0;
-  private Future<?> future = null;
 
   public EndlessProducer(
       ExecutorService executor,
@@ -44,7 +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);
   }
@@ -56,7 +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)
         {
@@ -75,16 +74,24 @@ public class EndlessProducer implements Runnable
     }
     catch (Exception e)
     {
-
+      log.error("{} - Unexpected Exception:", id, e);
+    }
+    finally
+    {
+      synchronized (this)
+      {
+        running = false;
+        log.info("{} - Stopped - produced {} messages so far", id, produced);
+      }
     }
   }
 
-  void send(String key, String value)
+  void send(String key, Long value)
   {
     final long time = System.currentTimeMillis();
 
-    final ProducerRecord<String, String> record = new ProducerRecord<>(
-        "test", // Topic
+    final ProducerRecord<String, Long> record = new ProducerRecord<>(
+        topic,  // Topic
         key,    // Key
         value   // Value
     );
@@ -138,7 +145,7 @@ public class EndlessProducer implements Runnable
 
     log.info("{} - Starting - produced {} messages before", id, produced);
     running = true;
-    future = executor.submit(this);
+    executor.submit(this);
   }
 
   public synchronized void stop() throws ExecutionException, InterruptedException
@@ -148,8 +155,6 @@ public class EndlessProducer implements Runnable
 
     log.info("{} - Stopping...", id);
     running = false;
-    future.get();
-    log.info("{} - Stopped - produced {} messages so far", id, produced);
   }
 
   @PreDestroy