juplo.de Git - demos/kafka/training/blob - src/main/java/de/juplo/kafka/ApplicationConfiguration.java

   1 package de.juplo.kafka;
   2
   3 import org.apache.kafka.clients.consumer.Consumer;
   4 import org.apache.kafka.clients.consumer.KafkaConsumer;
   5 import org.apache.kafka.common.serialization.StringDeserializer;
   6 import org.springframework.boot.context.properties.EnableConfigurationProperties;
   7 import org.springframework.context.annotation.Bean;
   8 import org.springframework.context.annotation.Configuration;
   9
  10 import java.util.Properties;
  11
  12
  13 @Configuration
  14 @EnableConfigurationProperties({ ApplicationProperties.class })
  15 public class ApplicationConfiguration
  16 {
  17   @Bean
  18   public SimpleConsumer simpleConsumer(
  19       Consumer<String, String> kafkaConsumer,
  20       ApplicationProperties applicationProperties)
  21   {
  22     return
  23         new SimpleConsumer(
  24             applicationProperties.getClientId(),
  25             applicationProperties.getTopic(),
  26             kafkaConsumer);
  27   }
  28
  29   @Bean
  30   public Consumer<String, String> kafkaConsumer(ApplicationProperties properties)
  31   {
  32     Properties props = new Properties();
  33     props.put("bootstrap.servers", properties.getBootstrapServers());
  34     props.put("group.id", properties.getGroupId()); // ID für die Offset-Commits
  35     props.put("client.id", properties.getClientId()); // Nur zur Wiedererkennung
  36     props.put("auto.offset.reset", properties.getAutoOffsetReset());
  37     props.put("partition.assignment.strategy", "org.apache.kafka.clients.consumer.CooperativeStickyAssignor");
  38     props.put("key.deserializer", StringDeserializer.class.getName());
  39     props.put("value.deserializer", StringDeserializer.class.getName());
  40
  41     return new KafkaConsumer<>(props);
  42   }
  43 }