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