From: Kai Moritz <kai@juplo.de>
Date: Fri, 1 Nov 2024 08:55:43 +0000 (+0100)
Subject: Audit-Headers für den `ExampleProducer` implementiert
X-Git-Tag: producer/simple-producer--auditheaders--2025-03-18--19-42
X-Git-Url: https://juplo.de/gitweb/?a=commitdiff_plain;h=b382f70b7a889726bfc0c3443f441b8995ebf9c7;p=demos%2Fkafka%2Ftraining

Audit-Headers für den `ExampleProducer` implementiert
---

diff --git a/README.sh b/README.sh
index 3d98ace7..7cec701b 100755
--- a/README.sh
+++ b/README.sh
@@ -1,6 +1,6 @@
 #!/bin/bash
 
-IMAGE=juplo/simple-producer:1.0-SNAPSHOT
+IMAGE=juplo/simple-producer:1.0-auditheaders-SNAPSHOT
 
 if [ "$1" = "cleanup" ]
 then
@@ -10,7 +10,7 @@ then
 fi
 
 docker compose -f docker/docker-compose.yml up -d --remove-orphans kafka-1 kafka-2 kafka-3
-docker compose -f docker/docker-compose.yml rm -svf producer
+docker compose -f docker/docker-compose.yml rm -svf setup peter ute
 
 if [[
   $(docker image ls -q $IMAGE) == "" ||
@@ -26,11 +26,14 @@ fi
 docker compose -f docker/docker-compose.yml up --remove-orphans setup || exit 1
 
 
-docker compose -f docker/docker-compose.yml up -d producer
-sleep 5
+docker compose -f docker/docker-compose.yml up -d peter ute
+sleep 10
 
-docker compose -f docker/docker-compose.yml exec cli kafkacat -b kafka:9092 -t test -c 20 -f'topic=%t\tpartition=%p\toffset=%o\tkey=%k\tvalue=%s\n'
 
-docker compose -f docker/docker-compose.yml stop producer
-docker compose -f docker/docker-compose.yml exec cli kafkacat -b kafka:9092 -t test -e -f'topic=%t\tpartition=%p\toffset=%o\tkey=%k\tvalue=%s\n'
-docker compose -f docker/docker-compose.yml logs producer
+echo
+echo "Empfangen:"
+docker compose -f docker/docker-compose.yml exec cli kafkacat -b kafka:9092 -t test -e -c 100
+
+echo
+echo "Empfangen (mit Headern!):"
+docker compose -f docker/docker-compose.yml exec cli kafkacat -b kafka:9092 -t test -e -c 100 -J
diff --git a/docker/docker-compose.yml b/docker/docker-compose.yml
index 5b19de74..ece29538 100644
--- a/docker/docker-compose.yml
+++ b/docker/docker-compose.yml
@@ -136,9 +136,29 @@ services:
       - kafka-3
 
   producer:
-    image: juplo/simple-producer:1.0-SNAPSHOT
+    image: juplo/simple-producer:1.0-auditheaders-SNAPSHOT
     command: kafka:9092 test producer
 
+  foo:
+    image: juplo/simple-producer:1.0-auditheaders-SNAPSHOT
+    command: kafka:9092 test foo
+
+  bar:
+    image: juplo/simple-producer:1.0-auditheaders-SNAPSHOT
+    command: kafka:9092 test bar
+
+  consumer:
+    image: juplo/simple-consumer:1.0-SNAPSHOT
+    command: kafka:9092 test my-group consumer
+
+  peter:
+    image: juplo/simple-consumer:1.0-SNAPSHOT
+    command: kafka:9092 test my-group peter
+
+  ute:
+    image: juplo/simple-consumer:1.0-SNAPSHOT
+    command: kafka:9092 test my-group ute
+
 volumes:
   zookeeper-data:
   zookeeper-log:
diff --git a/pom.xml b/pom.xml
index 3da4d59e..fdcdff64 100644
--- a/pom.xml
+++ b/pom.xml
@@ -15,7 +15,7 @@
   <artifactId>simple-producer</artifactId>
   <name>Super Simple Producer</name>
   <description>A Simple Producer, programmed with pure Java, that sends messages via Kafka</description>
-  <version>1.0-SNAPSHOT</version>
+  <version>1.0-auditheaders-SNAPSHOT</version>
 
   <properties>
     <java.version>21</java.version>
diff --git a/src/main/java/de/juplo/kafka/ExampleProducer.java b/src/main/java/de/juplo/kafka/ExampleProducer.java
index 0bab4426..ea24b338 100644
--- a/src/main/java/de/juplo/kafka/ExampleProducer.java
+++ b/src/main/java/de/juplo/kafka/ExampleProducer.java
@@ -6,12 +6,16 @@ import org.apache.kafka.clients.producer.KafkaProducer;
 import org.apache.kafka.clients.producer.ProducerRecord;
 import org.apache.kafka.common.serialization.StringSerializer;
 
+import java.math.BigInteger;
 import java.util.Properties;
 
 
 @Slf4j
 public class ExampleProducer
 {
+  public final static String HEADER_ID = "id";
+  public final static String HEADER_PRODUCED = "#";
+
   private final String id;
   private final String topic;
   private final Producer<String, String> producer;
@@ -71,6 +75,11 @@ public class ExampleProducer
       value   // Value
     );
 
+    record
+      .headers()
+      .add(HEADER_ID, id.getBytes())
+      .add(HEADER_PRODUCED, BigInteger.valueOf(produced).toByteArray());
+
     producer.send(record, (metadata, e) ->
     {
       long now = System.currentTimeMillis();