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 WordcountRecordHandler wordcountRecordHandler(
  22       PartitionStatisticsRepository repository,
  23       Consumer<String, String> consumer,
  24       ApplicationProperties properties)
  25   {
  26     return new WordcountRecordHandler(
  27         repository,
  28         properties.getClientId(),
  29         properties.getTopic(),
  30         Clock.systemDefaultZone(),
  31         properties.getCommitInterval(),
  32         consumer);
  33   }
  34
  35   @Bean
  36   public WordcountRebalanceListener wordcountRebalanceListener(
  37       WordcountRecordHandler wordcountRecordHandler)
  38   {
  39     return new WordcountRebalanceListener(wordcountRecordHandler);
  40   }
  41
  42   @Bean
  43   public EndlessConsumer<String, String> endlessConsumer(
  44       KafkaConsumer<String, String> kafkaConsumer,
  45       ExecutorService executor,
  46       WordcountRebalanceListener wordcountRebalanceListener,
  47       WordcountRecordHandler wordcountRecordHandler,
  48       ApplicationProperties properties)
  49   {
  50     return
  51         new EndlessConsumer<>(
  52             executor,
  53             properties.getClientId(),
  54             properties.getTopic(),
  55             kafkaConsumer,
  56             wordcountRebalanceListener,
  57             wordcountRecordHandler);
  58   }
  59
  60   @Bean
  61   public ExecutorService executor()
  62   {
  63     return Executors.newSingleThreadExecutor();
  64   }
  65
  66   @Bean(destroyMethod = "close")
  67   public KafkaConsumer<String, String> kafkaConsumer(ApplicationProperties properties)
  68   {
  69     Properties props = new Properties();
  70
  71     props.put("bootstrap.servers", properties.getBootstrapServer());
  72     props.put("partition.assignment.strategy", "org.apache.kafka.clients.consumer.CooperativeStickyAssignor");
  73     props.put("group.id", properties.getGroupId());
  74     props.put("client.id", properties.getClientId());
  75     props.put("enable.auto.commit", false);
  76     props.put("auto.offset.reset", properties.getAutoOffsetReset());
  77     props.put("metadata.max.age.ms", "1000");
  78     props.put("key.deserializer", StringDeserializer.class.getName());
  79     props.put("value.deserializer", StringDeserializer.class.getName());
  80
  81     return new KafkaConsumer<>(props);
  82   }
  83 }