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