Vorlage

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

diff --git a/src/main/java/de/juplo/kafka/SimpleConsumer.java b/src/main/java/de/juplo/kafka/SimpleConsumer.java
index 3b0202f..8e557c2 100644 (file)
--- a/src/main/java/de/juplo/kafka/SimpleConsumer.java
+++ b/src/main/java/de/juplo/kafka/SimpleConsumer.java
@@ -9,21 +9,22 @@ import org.apache.kafka.common.errors.WakeupException;
 
 import java.time.Duration;
 import java.util.Arrays;
+import java.util.concurrent.Callable;
 
 
 @Slf4j
 @RequiredArgsConstructor
-public class SimpleConsumer implements Runnable
+public class SimpleConsumer implements Callable<Integer>
 {
   private final String id;
   private final String topic;
-  private final Consumer<String, Message> consumer;
+  private final Consumer<String, String> consumer;
 
   private long consumed = 0;
 
 
   @Override
-  public void run()
+  public Integer call()
   {
     try
     {
@@ -32,11 +33,11 @@ public class SimpleConsumer implements Runnable
 
       while (true)
       {
-        ConsumerRecords<String, Message> records =
+        ConsumerRecords<String, String> records =
             consumer.poll(Duration.ofSeconds(1));
 
         log.info("{} - Received {} messages", id, records.count());
-        for (ConsumerRecord<String, Message> record : records)
+        for (ConsumerRecord<String, String> record : records)
         {
           handleRecord(
             record.topic(),
@@ -50,11 +51,13 @@ public class SimpleConsumer implements Runnable
     catch(WakeupException e)
     {
       log.info("{} - Consumer was signaled to finish its work", id);
+      return 0;
     }
     catch(Exception e)
     {
       log.error("{} - Unexpected error: {}, unsubscribing!", id, e.toString());
       consumer.unsubscribe();
+      return 1;
     }
     finally
     {