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.time.Clock;
  11 import java.util.Properties;
  12 import java.util.concurrent.ExecutorService;
  13 import java.util.concurrent.Executors;
  14
  15
  16 @Configuration
  17 @EnableConfigurationProperties(ApplicationProperties.class)
  18 public class ApplicationConfiguration
  19 {
  20   @Bean
  21   public ApplicationRecordHandler recordHandler(AdderResults adderResults)
  22   {
  23     return new ApplicationRecordHandler(adderResults);
  24   }
  25
  26   @Bean
  27   public AdderResults adderResults()
  28   {
  29     return new AdderResults();
  30   }
  31
  32   @Bean
  33   public ApplicationRebalanceListener rebalanceListener(
  34       ApplicationRecordHandler recordHandler,
  35       AdderResults adderResults,
  36       StateRepository stateRepository,
  37       Consumer<String, String> consumer,
  38       ApplicationProperties properties)
  39   {
  40     return new ApplicationRebalanceListener(
  41         recordHandler,
  42         adderResults,
  43         stateRepository,
  44         properties.getClientId(),
  45         properties.getTopic(),
  46         Clock.systemDefaultZone(),
  47         properties.getCommitInterval(),
  48         consumer);
  49   }
  50
  51   @Bean
  52   public EndlessConsumer<String, String> endlessConsumer(
  53       KafkaConsumer<String, String> kafkaConsumer,
  54       ExecutorService executor,
  55       ApplicationRebalanceListener rebalanceListener,
  56       ApplicationRecordHandler recordHandler,
  57       ApplicationProperties properties)
  58   {
  59     return
  60         new EndlessConsumer<>(
  61             executor,
  62             properties.getClientId(),
  63             properties.getTopic(),
  64             kafkaConsumer,
  65             rebalanceListener,
  66             recordHandler);
  67   }
  68
  69   @Bean
  70   public ExecutorService executor()
  71   {
  72     return Executors.newSingleThreadExecutor();
  73   }
  74
  75   @Bean(destroyMethod = "close")
  76   public KafkaConsumer<String, String> kafkaConsumer(ApplicationProperties properties)
  77   {
  78     Properties props = new Properties();
  79
  80     props.put("bootstrap.servers", properties.getBootstrapServer());
  81     props.put("partition.assignment.strategy", "org.apache.kafka.clients.consumer.CooperativeStickyAssignor");
  82     props.put("group.id", properties.getGroupId());
  83     props.put("client.id", properties.getClientId());
  84     props.put("enable.auto.commit", false);
  85     props.put("auto.offset.reset", properties.getAutoOffsetReset());
  86     props.put("metadata.max.age.ms", "1000");
  87     props.put("key.deserializer", StringDeserializer.class.getName());
  88     props.put("value.deserializer", StringDeserializer.class.getName());
  89
  90     return new KafkaConsumer<>(props);
  91   }
  92 }