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.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         properties.getClientId());
  29   }
  30
  31   @Bean
  32   public AdderResults adderResults()
  33   {
  34     return new AdderResults();
  35   }
  36
  37   @Bean
  38   public ApplicationRebalanceListener rebalanceListener(
  39       ApplicationRecordHandler recordHandler,
  40       AdderResults adderResults,
  41       StateRepository stateRepository,
  42       Consumer<String, String> consumer,
  43       ApplicationProperties properties)
  44   {
  45     return new ApplicationRebalanceListener(
  46         recordHandler,
  47         adderResults,
  48         stateRepository,
  49         properties.getClientId(),
  50         properties.getTopic(),
  51         consumer);
  52   }
  53
  54   @Bean
  55   public EndlessConsumer<String, String> endlessConsumer(
  56       KafkaConsumer<String, String> kafkaConsumer,
  57       ExecutorService executor,
  58       ApplicationRebalanceListener rebalanceListener,
  59       ApplicationRecordHandler recordHandler,
  60       ApplicationProperties properties)
  61   {
  62     return
  63         new EndlessConsumer<>(
  64             executor,
  65             properties.getClientId(),
  66             properties.getTopic(),
  67             kafkaConsumer,
  68             rebalanceListener,
  69             recordHandler);
  70   }
  71
  72   @Bean
  73   public ExecutorService executor()
  74   {
  75     return Executors.newSingleThreadExecutor();
  76   }
  77
  78   @Bean(destroyMethod = "close")
  79   public KafkaConsumer<String, String> kafkaConsumer(ApplicationProperties properties)
  80   {
  81     Properties props = new Properties();
  82
  83     props.put("bootstrap.servers", properties.getBootstrapServer());
  84     props.put("partition.assignment.strategy", "org.apache.kafka.clients.consumer.CooperativeStickyAssignor");
  85     props.put("group.id", properties.getGroupId());
  86     props.put("client.id", properties.getClientId());
  87     props.put("enable.auto.commit", false);
  88     props.put("auto.offset.reset", properties.getAutoOffsetReset());
  89     props.put("metadata.max.age.ms", "1000");
  90     props.put("key.deserializer", StringDeserializer.class.getName());
  91     props.put("value.deserializer", StringDeserializer.class.getName());
  92
  93     return new KafkaConsumer<>(props);
  94   }
  95 }