Vorlage für das Empfangen von Nachrichten aus einer geteilten Lib

diff --git a/src/main/java/de/juplo/kafka/ApplicationConfiguration.java b/src/main/java/de/juplo/kafka/ApplicationConfiguration.java
index f114fed..e006172 100644 (file)
--- a/src/main/java/de/juplo/kafka/ApplicationConfiguration.java
+++ b/src/main/java/de/juplo/kafka/ApplicationConfiguration.java
@@ -5,7 +5,6 @@ import org.apache.kafka.clients.consumer.Consumer;
 import org.apache.kafka.clients.consumer.KafkaConsumer;
 import org.apache.kafka.clients.consumer.StickyAssignor;
 import org.apache.kafka.common.serialization.StringDeserializer;
-import org.springframework.kafka.support.serializer.JsonDeserializer;
 import org.springframework.boot.context.properties.EnableConfigurationProperties;
 import org.springframework.context.ConfigurableApplicationContext;
 import org.springframework.context.annotation.Bean;
@@ -20,7 +19,7 @@ public class ApplicationConfiguration
 {
   @Bean
   public ExampleConsumer exampleConsumer(
-      Consumer<String, Message> kafkaConsumer,
+      Consumer<String, String> kafkaConsumer,
       ApplicationProperties properties,
       ConfigurableApplicationContext applicationContext)
   {
@@ -33,7 +32,7 @@ public class ApplicationConfiguration
   }
 
   @Bean(destroyMethod = "")
-  public KafkaConsumer<String, Message> kafkaConsumer(ApplicationProperties properties)
+  public KafkaConsumer<String, String> kafkaConsumer(ApplicationProperties properties)
   {
     Properties props = new Properties();
     props.put("bootstrap.servers", properties.getBootstrapServer());
@@ -50,7 +49,7 @@ public class ApplicationConfiguration
     props.put("metadata.maxage.ms", 5000); //  5 Sekunden
     props.put("partition.assignment.strategy", StickyAssignor.class.getName());
     props.put("key.deserializer", StringDeserializer.class.getName());
-    props.put("value.deserializer", JsonDeserializer.class.getName());
+    props.put("value.deserializer", StringDeserializer.class.getName());
     props.put("spring.json.trusted.packages", "de.juplo.messages");
 
     return new KafkaConsumer<>(props);

diff --git a/src/main/java/de/juplo/kafka/ExampleConsumer.java b/src/main/java/de/juplo/kafka/ExampleConsumer.java
index 9305190..031e9d7 100644 (file)
--- a/src/main/java/de/juplo/kafka/ExampleConsumer.java
+++ b/src/main/java/de/juplo/kafka/ExampleConsumer.java
@@ -18,7 +18,7 @@ public class ExampleConsumer implements Runnable
 {
   private final String id;
   private final String topic;
-  private final Consumer<String, Message> consumer;
+  private final Consumer<String, String> consumer;
   private final Thread workerThread;
   private final Runnable closeCallback;
 
@@ -29,7 +29,7 @@ public class ExampleConsumer implements Runnable
   public ExampleConsumer(
     String clientId,
     String topic,
-    Consumer<String, Message> consumer,
+    Consumer<String, String> consumer,
     Runnable closeCallback)
   {
     this.id = clientId;
@@ -54,11 +54,11 @@ public class ExampleConsumer implements Runnable
 
       while (running)
       {
-        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(),
@@ -93,16 +93,16 @@ public class ExampleConsumer implements Runnable
     Integer partition,
     Long offset,
     String key,
-    Message value)
+    String value)
   {
     consumed++;
     log.info("{} - partition={}-{}, offset={}: {}={}", id, topic, partition, offset, key, value);
-    switch (value.getType())
-    {
-      case ADD  -> addNumber((Add)value);
-      case CALC -> calcSum((Calculate)value);
-      default   -> log.error("{} - Ignoring message of unknown typ {}", id, value.getType());
-    }
+    // switch (value.getType())
+    // {
+    //   case ADD  -> addNumber((Add)value);
+    //   case CALC -> calcSum((Calculate)value);
+    //   default   -> log.error("{} - Ignoring message of unknown typ {}", id, value.getType());
+    // }
   }
 
   private void addNumber(Add add)