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.springframework.boot.autoconfigure.kafka.KafkaProperties;
   5 import org.springframework.boot.context.properties.EnableConfigurationProperties;
   6 import org.springframework.context.annotation.Bean;
   7 import org.springframework.context.annotation.Configuration;
   8
   9 import java.util.Optional;
  10 import org.springframework.kafka.core.ConsumerFactory;
  11
  12 import java.util.concurrent.ExecutorService;
  13 import java.util.concurrent.Executors;
  14
  15
  16 @Configuration
  17 @EnableConfigurationProperties({ KafkaProperties.class, ApplicationProperties.class })
  18 public class ApplicationConfiguration
  19 {
  20   @Bean
  21   public ApplicationRecordHandler recordHandler(
  22       AdderResults adderResults,
  23       KafkaProperties kafkaProperties,
  24       ApplicationProperties applicationProperties)
  25   {
  26     return new ApplicationRecordHandler(
  27         adderResults,
  28         Optional.ofNullable(applicationProperties.getThrottle()),
  29         kafkaProperties.getClientId());
  30   }
  31
  32   @Bean
  33   public AdderResults adderResults()
  34   {
  35     return new AdderResults();
  36   }
  37
  38   @Bean
  39   public ApplicationRebalanceListener rebalanceListener(
  40       ApplicationRecordHandler recordHandler,
  41       AdderResults adderResults,
  42       StateRepository stateRepository,
  43       KafkaProperties kafkaProperties,
  44       ApplicationProperties applicationProperties)
  45   {
  46     return new ApplicationRebalanceListener(
  47         recordHandler,
  48         adderResults,
  49         stateRepository,
  50         kafkaProperties.getClientId());
  51   }
  52
  53   @Bean
  54   public EndlessConsumer<String, Message> endlessConsumer(
  55       Consumer<String, Message> kafkaConsumer,
  56       ExecutorService executor,
  57       ApplicationRebalanceListener rebalanceListener,
  58       ApplicationRecordHandler recordHandler,
  59       KafkaProperties kafkaProperties,
  60       ApplicationProperties applicationProperties)
  61   {
  62     return
  63         new EndlessConsumer<>(
  64             executor,
  65             kafkaProperties.getClientId(),
  66             applicationProperties.getTopic(),
  67             kafkaConsumer,
  68             rebalanceListener,
  69             recordHandler);
  70   }
  71
  72   @Bean
  73   public ExecutorService executor()
  74   {
  75     return Executors.newSingleThreadExecutor();
  76   }
  77
  78   @Bean(destroyMethod = "close")
  79   public Consumer<String, Message> kafkaConsumer(ConsumerFactory<String, Message> factory)
  80   {
  81     return factory.createConsumer();
  82   }
  83 }