X-Git-Url: https://juplo.de/gitweb/?p=demos%2Fkafka%2Foutbox;a=blobdiff_plain;f=delivery%2Fsrc%2Fmain%2Fjava%2Fde%2Fjuplo%2Fkafka%2Foutbox%2Fdelivery%2FOutboxProducer.java;h=2ad4b7e38acaf45cac25d712d9e2985223604074;hp=49f777fde694e6caca1fb72794698a2f88651cae;hb=0f0d035e62ec8035809108c2881065d24ca1b62d;hpb=8af60124c6506ccb535fab943dd2f8de72b926d8

diff --git a/delivery/src/main/java/de/juplo/kafka/outbox/delivery/OutboxProducer.java b/delivery/src/main/java/de/juplo/kafka/outbox/delivery/OutboxProducer.java
index 49f777f..2ad4b7e 100644
--- a/delivery/src/main/java/de/juplo/kafka/outbox/delivery/OutboxProducer.java
+++ b/delivery/src/main/java/de/juplo/kafka/outbox/delivery/OutboxProducer.java
@@ -17,8 +17,7 @@ import org.springframework.stereotype.Component;
 import javax.annotation.PreDestroy;
 
 import static org.apache.kafka.clients.CommonClientConfigs.BOOTSTRAP_SERVERS_CONFIG;
-import static org.apache.kafka.clients.producer.ProducerConfig.KEY_SERIALIZER_CLASS_CONFIG;
-import static org.apache.kafka.clients.producer.ProducerConfig.VALUE_SERIALIZER_CLASS_CONFIG;
+import static org.apache.kafka.clients.producer.ProducerConfig.*;
 
 
 @Component
@@ -26,6 +25,7 @@ public class OutboxProducer
 {
   final static Logger LOG = LoggerFactory.getLogger(OutboxProducer.class);
 
+  public final static String HEADER = "#";
 
   private final OutboxRepository repository;
   private final KafkaProducer<String, String> producer;
@@ -43,6 +43,7 @@ public class OutboxProducer
     props.put(BOOTSTRAP_SERVERS_CONFIG, properties.bootstrapServers);
     props.put(KEY_SERIALIZER_CLASS_CONFIG, StringSerializer.class.getName());
     props.put(VALUE_SERIALIZER_CLASS_CONFIG, StringSerializer.class.getName());
+    props.put(ENABLE_IDEMPOTENCE_CONFIG, true);
 
     this.producer = new KafkaProducer<>(props);
     this.topic = properties.topic;
@@ -68,7 +69,7 @@ public class OutboxProducer
         new ProducerRecord<>(topic, item.getKey(), item.getValue());
 
     sequenceNumber = item.getSequenceNumber();
-    record.headers().add("SEQ#", Longs.toByteArray(sequenceNumber));
+    record.headers().add(HEADER, Longs.toByteArray(sequenceNumber));
 
     producer.send(record, (metadata, e) ->
     {