Spring-Version des Endless-Stream-Producer's

[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..30fefab 100644 (file)
--- a/src/main/java/de/juplo/kafka/EndlessProducer.java
+++ b/src/main/java/de/juplo/kafka/EndlessProducer.java
@@ -1,12 +1,13 @@
 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.StringSerializer;
+import org.apache.kafka.clients.producer.RecordMetadata;
+import org.springframework.kafka.core.KafkaTemplate;
+import org.springframework.kafka.support.SendResult;
+import org.springframework.util.concurrent.ListenableFuture;
 
 import javax.annotation.PreDestroy;
-import java.util.Properties;
 import java.util.concurrent.ExecutionException;
 import java.util.concurrent.ExecutorService;
 
@@ -16,9 +17,8 @@ public class EndlessProducer implements Runnable
 {
   private final ExecutorService executor;
   private final String id;
-  private final String topic;
   private final int throttleMs;
-  private final KafkaProducer<String, String> producer;
+  private final KafkaTemplate<String, String> kafkaTemplate;
 
   private boolean running = false;
   private long i = 0;
@@ -26,25 +26,14 @@ public class EndlessProducer implements Runnable
 
   public EndlessProducer(
       ExecutorService executor,
-      String bootstrapServer,
       String clientId,
-      String topic,
-      String acks,
-      int throttleMs)
+      int throttleMs,
+      KafkaTemplate<String, String> kafkaTemplate)
   {
     this.executor = executor;
     this.id = clientId;
-    this.topic = topic;
     this.throttleMs = throttleMs;
-
-    Properties props = new Properties();
-    props.put("bootstrap.servers", bootstrapServer);
-    props.put("client.id", clientId);
-    props.put("acks", acks);
-    props.put("key.serializer", StringSerializer.class.getName());
-    props.put("value.serializer", StringSerializer.class.getName());
-
-    this.producer = new KafkaProducer<>(props);
+    this.kafkaTemplate = kafkaTemplate;
   }
 
   @Override
@@ -89,17 +78,14 @@ public class EndlessProducer implements Runnable
   {
     final long time = System.currentTimeMillis();
 
-    final ProducerRecord<String, String> record = new ProducerRecord<>(
-        topic,  // Topic
-        key,    // Key
-        value   // Value
-    );
-
-    producer.send(record, (metadata, e) ->
-    {
-      long now = System.currentTimeMillis();
-      if (e == null)
+    ListenableFuture<SendResult<String, String>> listenableFuture = kafkaTemplate.sendDefault(key, value);
+    listenableFuture.addCallback(
+      result ->
       {
+        long now = System.currentTimeMillis();
+        RecordMetadata metadata = result.getRecordMetadata();
+        ProducerRecord<String, String> record = result.getProducerRecord();
+
         // HANDLE SUCCESS
         produced++;
         log.debug(
@@ -112,27 +98,27 @@ public class EndlessProducer implements Runnable
             metadata.timestamp(),
             now - time
         );
-      }
-      else
+      },
+      e ->
       {
+        long now = System.currentTimeMillis();
+
         // HANDLE ERROR
         log.error(
-            "{} - ERROR key={} timestamp={} latency={}ms: {}",
+            "{} - ERROR key={} latency={}ms: {}",
             id,
-            record.key(),
-            metadata == null ? -1 : metadata.timestamp(),
+            key,
             now - time,
             e.toString()
         );
-      }
-    });
+      });
 
     long now = System.currentTimeMillis();
     log.trace(
         "{} - Queued #{} key={} latency={}ms",
         id,
         value,
-        record.key(),
+        key,
         now - time
     );
   }
@@ -170,8 +156,6 @@ public class EndlessProducer implements Runnable
     }
     finally
     {
-      log.info("{} - Closing the KafkaProducer", id);
-      producer.close();
       log.info("{}: Produced {} messages in total, exiting!", id, produced);
     }
   }