From: Kai Moritz <kai@juplo.de>
Date: Tue, 12 Nov 2024 02:31:03 +0000 (+0100)
Subject: Vorlage für die Übung zum `JsonSerializer`
X-Git-Tag: producer/spring-producer--json--vorlage--2024-11-13--si
X-Git-Url: http://juplo.de/gitweb/?a=commitdiff_plain;h=0816c4ae4a9829f384715a7991cf2c8fe2a5843c;p=demos%2Fkafka%2Ftraining

Vorlage für die Übung zum `JsonSerializer`
---

diff --git a/README.sh b/README.sh
deleted file mode 100755
index 68deb85..0000000
--- a/README.sh
+++ /dev/null
@@ -1,42 +0,0 @@
-#!/bin/bash
-
-IMAGE=juplo/spring-producer:1.0-json-SNAPSHOT
-
-if [ "$1" = "cleanup" ]
-then
-  docker compose -f docker/docker-compose.yml down -t0 -v --remove-orphans
-  mvn clean
-  exit
-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
-
-if [[
-  $(docker image ls -q $IMAGE) == "" ||
-  "$1" = "build"
-]]
-then
-  mvn clean install || exit
-else
-  echo "Using image existing images:"
-  docker image ls $IMAGE
-fi
-
-docker compose -f docker/docker-compose.yml up --remove-orphans setup || exit 1
-
-
-docker compose -f docker/docker-compose.yml up -d producer
-docker compose -f docker/docker-compose.yml up -d consumer-1 consumer-2
-sleep 15
-
-docker compose -f docker/docker-compose.yml stop producer
-
-echo
-echo "Von consumer-1 empfangen:"
-docker compose -f docker/docker-compose.yml logs consumer-1 | grep '\ test\/.'
-echo
-echo "Von consumer-2 empfangen:"
-docker compose -f docker/docker-compose.yml logs consumer-2 | grep '\ test\/.'
-
-docker compose -f docker/docker-compose.yml stop consumer-1 consumer-2
diff --git a/src/main/java/de/juplo/kafka/ApplicationConfiguration.java b/src/main/java/de/juplo/kafka/ApplicationConfiguration.java
index d5ce01a..7540dd3 100644
--- a/src/main/java/de/juplo/kafka/ApplicationConfiguration.java
+++ b/src/main/java/de/juplo/kafka/ApplicationConfiguration.java
@@ -7,7 +7,6 @@ import org.springframework.boot.context.properties.EnableConfigurationProperties
 import org.springframework.context.ConfigurableApplicationContext;
 import org.springframework.context.annotation.Bean;
 import org.springframework.context.annotation.Configuration;
-import org.springframework.kafka.support.serializer.JsonSerializer;
 
 import java.time.Duration;
 import java.util.Properties;
@@ -20,7 +19,7 @@ public class ApplicationConfiguration
   @Bean
   public ExampleProducer exampleProducer(
       ApplicationProperties properties,
-      Producer<String, SumupMessage> kafkaProducer,
+      Producer<String, String> kafkaProducer,
       ConfigurableApplicationContext applicationContext)
   {
     return
@@ -35,7 +34,7 @@ public class ApplicationConfiguration
   }
 
   @Bean(destroyMethod = "")
-  public KafkaProducer<String, SumupMessage> kafkaProducer(ApplicationProperties properties)
+  public KafkaProducer<String, String> kafkaProducer(ApplicationProperties properties)
   {
     Properties props = new Properties();
     props.put("bootstrap.servers", properties.getBootstrapServer());
@@ -50,8 +49,7 @@ public class ApplicationConfiguration
     props.put("linger.ms", properties.getProducerProperties().getLinger().toMillis());
     props.put("compression.type", properties.getProducerProperties().getCompressionType());
     props.put("key.serializer", StringSerializer.class.getName());
-    props.put("value.serializer", JsonSerializer.class.getName());
-    props.put("spring.json.type.mapping", "ADD:de.juplo.kafka.AddNumberMessage,CALC:de.juplo.kafka.CalculateSumMessage");
+    props.put("value.serializer", StringSerializer.class.getName());
 
     return new KafkaProducer<>(props);
   }
diff --git a/src/main/java/de/juplo/kafka/ExampleProducer.java b/src/main/java/de/juplo/kafka/ExampleProducer.java
index 2360704..51eba2a 100644
--- a/src/main/java/de/juplo/kafka/ExampleProducer.java
+++ b/src/main/java/de/juplo/kafka/ExampleProducer.java
@@ -13,7 +13,7 @@ public class ExampleProducer implements Runnable
   private final String id;
   private final String topic;
   private final Duration throttle;
-  private final Producer<String, SumupMessage> producer;
+  private final Producer<String, String> producer;
   private final Thread workerThread;
   private final Runnable closeCallback;
 
@@ -25,7 +25,7 @@ public class ExampleProducer implements Runnable
     String id,
     String topic,
     Duration throttle,
-    Producer<String, SumupMessage> producer,
+    Producer<String, String> producer,
     Runnable closeCallback)
   {
     this.id = id;
@@ -54,7 +54,7 @@ public class ExampleProducer implements Runnable
           ? new CalculateSumMessage(number)
           : new AddNumberMessage(number, i);
 
-        send(Long.toString(number), message);
+        send(Long.toString(number), message.toString());
 
         if (throttle.isPositive())
         {
@@ -83,11 +83,11 @@ public class ExampleProducer implements Runnable
     }
   }
 
-  void send(String key, SumupMessage value)
+  void send(String key, String value)
   {
     final long time = System.currentTimeMillis();
 
-    final ProducerRecord<String, SumupMessage> record = new ProducerRecord<>(
+    final ProducerRecord<String, String> record = new ProducerRecord<>(
         topic,  // Topic
         key,    // Key
         value   // Value