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.Optional;
  12 import java.util.Properties;
  13 import java.util.concurrent.ExecutorService;
  14 import java.util.concurrent.Executors;
  15
  16
  17 @Configuration
  18 @EnableConfigurationProperties(ApplicationProperties.class)
  19 public class ApplicationConfiguration
  20 {
  21   @Bean
  22   public ApplicationRecordHandler recordHandler(
  23       AdderResults adderResults,
  24       ApplicationProperties properties)
  25   {
  26     return new ApplicationRecordHandler(
  27         adderResults,
  28         Optional.ofNullable(properties.getThrottle()),
  29         properties.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       Consumer<String, String> consumer,
  44       ApplicationProperties properties)
  45   {
  46     return new ApplicationRebalanceListener(
  47         recordHandler,
  48         adderResults,
  49         stateRepository,
  50         properties.getClientId(),
  51         properties.getTopic(),
  52         Clock.systemDefaultZone(),
  53         properties.getCommitInterval(),
  54         consumer);
  55   }
  56
  57   @Bean
  58   public EndlessConsumer<String, String> endlessConsumer(
  59       KafkaConsumer<String, String> kafkaConsumer,
  60       ExecutorService executor,
  61       ApplicationRebalanceListener rebalanceListener,
  62       ApplicationRecordHandler recordHandler,
  63       ApplicationProperties properties)
  64   {
  65     return
  66         new EndlessConsumer<>(
  67             executor,
  68             properties.getClientId(),
  69             properties.getTopic(),
  70             kafkaConsumer,
  71             rebalanceListener,
  72             recordHandler);
  73   }
  74
  75   @Bean
  76   public ExecutorService executor()
  77   {
  78     return Executors.newSingleThreadExecutor();
  79   }
  80
  81   @Bean(destroyMethod = "close")
  82   public KafkaConsumer<String, String> kafkaConsumer(ApplicationProperties properties)
  83   {
  84     Properties props = new Properties();
  85
  86     props.put("bootstrap.servers", properties.getBootstrapServer());
  87     props.put("partition.assignment.strategy", "org.apache.kafka.clients.consumer.CooperativeStickyAssignor");
  88     props.put("group.id", properties.getGroupId());
  89     props.put("client.id", properties.getClientId());
  90     props.put("enable.auto.commit", false);
  91     props.put("auto.offset.reset", properties.getAutoOffsetReset());
  92     props.put("metadata.max.age.ms", "1000");
  93     props.put("key.deserializer", StringDeserializer.class.getName());
  94     props.put("value.deserializer", StringDeserializer.class.getName());
  95
  96     return new KafkaConsumer<>(props);
  97   }
  98 }