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 applicationRecordHandler(
  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   {
  45     return new ApplicationRebalanceListener(
  46         recordHandler,
  47         adderResults,
  48         stateRepository,
  49         kafkaProperties.getClientId());
  50   }
  51
  52   @Bean
  53   public EndlessConsumer<String, Message> endlessConsumer(
  54       Consumer<String, Message> kafkaConsumer,
  55       ExecutorService executor,
  56       ApplicationRebalanceListener rebalanceListener,
  57       RecordHandler recordHandler,
  58       KafkaProperties kafkaProperties,
  59       ApplicationProperties applicationProperties)
  60   {
  61     return
  62         new EndlessConsumer<>(
  63             executor,
  64             kafkaProperties.getClientId(),
  65             applicationProperties.getTopic(),
  66             kafkaConsumer,
  67             rebalanceListener,
  68             recordHandler);
  69   }
  70
  71   @Bean
  72   public ExecutorService executor()
  73   {
  74     return Executors.newSingleThreadExecutor();
  75   }
  76
  77   @Bean(destroyMethod = "close")
  78   public Consumer<String, Message> kafkaConsumer(ConsumerFactory<String, Message> factory)
  79   {
  80     return factory.createConsumer();
  81   }
  82 }