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.KafkaConsumer;
   4 import org.apache.kafka.common.serialization.StringDeserializer;
   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.time.Clock;
  10 import java.util.Properties;
  11 import java.util.concurrent.ExecutorService;
  12 import java.util.concurrent.Executors;
  13
  14
  15 @Configuration
  16 @EnableConfigurationProperties(ApplicationProperties.class)
  17 public class ApplicationConfiguration
  18 {
  19   @Bean
  20   public ApplicationRecordHandler recordHandler()
  21   {
  22     return new ApplicationRecordHandler();
  23   }
  24
  25   @Bean
  26   public ApplicationRebalanceListener rebalanceListener(
  27       ApplicationRecordHandler recordHandler,
  28       StateRepository stateRepository,
  29       ApplicationProperties properties)
  30   {
  31     return new ApplicationRebalanceListener(
  32         recordHandler,
  33         stateRepository,
  34         properties.getClientId(),
  35         Clock.systemDefaultZone(),
  36         properties.getCommitInterval());
  37   }
  38
  39   @Bean
  40   public EndlessConsumer<String, String> endlessConsumer(
  41       KafkaConsumer<String, String> kafkaConsumer,
  42       ExecutorService executor,
  43       ApplicationRebalanceListener rebalanceListener,
  44       ApplicationRecordHandler recordHandler,
  45       ApplicationProperties properties)
  46   {
  47     return
  48         new EndlessConsumer<>(
  49             executor,
  50             properties.getClientId(),
  51             properties.getTopic(),
  52             kafkaConsumer,
  53             rebalanceListener,
  54             recordHandler);
  55   }
  56
  57   @Bean
  58   public ExecutorService executor()
  59   {
  60     return Executors.newSingleThreadExecutor();
  61   }
  62
  63   @Bean(destroyMethod = "close")
  64   public KafkaConsumer<String, String> kafkaConsumer(ApplicationProperties properties)
  65   {
  66     Properties props = new Properties();
  67
  68     props.put("bootstrap.servers", properties.getBootstrapServer());
  69     props.put("partition.assignment.strategy", "org.apache.kafka.clients.consumer.CooperativeStickyAssignor");
  70     props.put("group.id", properties.getGroupId());
  71     props.put("client.id", properties.getClientId());
  72     props.put("auto.offset.reset", properties.getAutoOffsetReset());
  73     props.put("metadata.max.age.ms", "1000");
  74     props.put("key.deserializer", StringDeserializer.class.getName());
  75     props.put("value.deserializer", StringDeserializer.class.getName());
  76
  77     return new KafkaConsumer<>(props);
  78   }
  79 }