X-Git-Url: http://juplo.de/gitweb/?a=blobdiff_plain;f=src%2Fmain%2Fjava%2Fde%2Fjuplo%2Fkafka%2FApplicationConfiguration.java;h=4923b09ec1bad97610416c26b659ebdf0432fa1f;hb=1709f0e4f41be7e3b955d19769697a517633827d;hp=431041c9a068a028e86c102561dcadaa11692408;hpb=c4fd031abdae00bdbd934216579f0a38ddd46783;p=demos%2Fkafka%2Ftraining

diff --git a/src/main/java/de/juplo/kafka/ApplicationConfiguration.java b/src/main/java/de/juplo/kafka/ApplicationConfiguration.java
index 431041c..4923b09 100644
--- a/src/main/java/de/juplo/kafka/ApplicationConfiguration.java
+++ b/src/main/java/de/juplo/kafka/ApplicationConfiguration.java
@@ -1,22 +1,26 @@
 package de.juplo.kafka;
 
 import org.apache.kafka.clients.consumer.ConsumerRecord;
-import org.apache.kafka.clients.consumer.KafkaConsumer;
-import org.apache.kafka.common.serialization.LongDeserializer;
-import org.apache.kafka.common.serialization.StringDeserializer;
+import org.apache.kafka.common.TopicPartition;
+import org.apache.kafka.common.serialization.ByteArraySerializer;
+import org.apache.kafka.common.serialization.StringSerializer;
+import org.springframework.boot.autoconfigure.kafka.KafkaProperties;
 import org.springframework.boot.context.properties.EnableConfigurationProperties;
 import org.springframework.context.annotation.Bean;
 import org.springframework.context.annotation.Configuration;
-import org.springframework.kafka.support.serializer.JsonDeserializer;
+import org.springframework.kafka.core.*;
+import org.springframework.kafka.listener.DeadLetterPublishingRecoverer;
+import org.springframework.kafka.listener.DefaultErrorHandler;
+import org.springframework.kafka.support.serializer.DelegatingByTypeSerializer;
+import org.springframework.kafka.support.serializer.JsonSerializer;
+import org.springframework.util.backoff.FixedBackOff;
 
-import java.util.Properties;
-import java.util.concurrent.ExecutorService;
-import java.util.concurrent.Executors;
+import java.util.Map;
 import java.util.function.Consumer;
 
 
 @Configuration
-@EnableConfigurationProperties(ApplicationProperties.class)
+@EnableConfigurationProperties({ KafkaProperties.class, ApplicationProperties.class })
 public class ApplicationConfiguration
 {
   @Bean
@@ -29,42 +33,41 @@ public class ApplicationConfiguration
   }
 
   @Bean
-  public EndlessConsumer<String, ClientMessage> endlessConsumer(
-      KafkaConsumer<String, ClientMessage> kafkaConsumer,
-      ExecutorService executor,
-      Consumer<ConsumerRecord<String, ClientMessage>> handler,
-      ApplicationProperties properties)
+  public ProducerFactory<String, Object> producerFactory(KafkaProperties properties) {
+    return new DefaultKafkaProducerFactory<>(
+        properties.getProducer().buildProperties(),
+        new StringSerializer(),
+        new DelegatingByTypeSerializer(Map.of(
+            byte[].class, new ByteArraySerializer(),
+            ClientMessage.class, new JsonSerializer<>())));
+  }
+
+  @Bean
+  public KafkaTemplate<String, Object> kafkaTemplate(
+      ProducerFactory<String, Object> producerFactory) {
+
+    return new KafkaTemplate<>(producerFactory);
+  }
+
+  @Bean
+  public DeadLetterPublishingRecoverer recoverer(
+      ApplicationProperties properties,
+      KafkaOperations<?, ?> template)
   {
-    return
-        new EndlessConsumer<>(
-            executor,
-            properties.getClientId(),
-            properties.getTopic(),
-            kafkaConsumer,
-            handler);
+    return new DeadLetterPublishingRecoverer(
+        template,
+        (record, exception) -> new TopicPartition(properties.getDlqTopic(), record.partition()));
   }
 
   @Bean
-  public ExecutorService executor()
+  public DefaultErrorHandler errorHandler(DeadLetterPublishingRecoverer recoverer)
   {
-    return Executors.newSingleThreadExecutor();
+    return new DefaultErrorHandler(recoverer, new FixedBackOff(0l, 0l));
   }
 
   @Bean(destroyMethod = "close")
-  public KafkaConsumer<String, ClientMessage> kafkaConsumer(ApplicationProperties properties)
+  public org.apache.kafka.clients.consumer.Consumer<String, ClientMessage> kafkaConsumer(ConsumerFactory<String, ClientMessage> factory)
   {
-    Properties props = new Properties();
-
-    props.put("bootstrap.servers", properties.getBootstrapServer());
-    props.put("group.id", properties.getGroupId());
-    props.put("client.id", properties.getClientId());
-    props.put("auto.offset.reset", properties.getAutoOffsetReset());
-    props.put("metadata.max.age.ms", "1000");
-    props.put("key.deserializer", StringDeserializer.class.getName());
-    props.put("value.deserializer", JsonDeserializer.class.getName());
-    props.put(JsonDeserializer.TYPE_MAPPINGS, "message:" + ClientMessage.class.getName());
-    props.put(JsonDeserializer.TRUSTED_PACKAGES, "de.juplo.kafka");
-
-    return new KafkaConsumer<>(props);
+    return factory.createConsumer();
   }
 }