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 AdderRecordHandler sumRecordHandler()
  22   {
  23     return new AdderRecordHandler();
  24   }
  25
  26   @Bean
  27   public AdderRebalanceListener sumRebalanceListener(
  28       AdderRecordHandler adderRecordHandler,
  29       PartitionStatisticsRepository repository,
  30       Consumer<String, String> consumer,
  31       ApplicationProperties properties)
  32   {
  33     return new AdderRebalanceListener(
  34         adderRecordHandler,
  35         repository,
  36         properties.getClientId(),
  37         properties.getTopic(),
  38         Clock.systemDefaultZone(),
  39         properties.getCommitInterval(),
  40         consumer);
  41   }
  42
  43   @Bean
  44   public EndlessConsumer<String, String> endlessConsumer(
  45       KafkaConsumer<String, String> kafkaConsumer,
  46       ExecutorService executor,
  47       AdderRebalanceListener adderRebalanceListener,
  48       AdderRecordHandler adderRecordHandler,
  49       ApplicationProperties properties)
  50   {
  51     return
  52         new EndlessConsumer<>(
  53             executor,
  54             properties.getClientId(),
  55             properties.getTopic(),
  56             kafkaConsumer,
  57             adderRebalanceListener,
  58             adderRecordHandler);
  59   }
  60
  61   @Bean
  62   public ExecutorService executor()
  63   {
  64     return Executors.newSingleThreadExecutor();
  65   }
  66
  67   @Bean(destroyMethod = "close")
  68   public KafkaConsumer<String, String> kafkaConsumer(ApplicationProperties properties)
  69   {
  70     Properties props = new Properties();
  71
  72     props.put("bootstrap.servers", properties.getBootstrapServer());
  73     props.put("partition.assignment.strategy", "org.apache.kafka.clients.consumer.CooperativeStickyAssignor");
  74     props.put("group.id", properties.getGroupId());
  75     props.put("client.id", properties.getClientId());
  76     props.put("enable.auto.commit", false);
  77     props.put("auto.offset.reset", properties.getAutoOffsetReset());
  78     props.put("metadata.max.age.ms", "1000");
  79     props.put("key.deserializer", StringDeserializer.class.getName());
  80     props.put("value.deserializer", StringDeserializer.class.getName());
  81
  82     return new KafkaConsumer<>(props);
  83   }
  84 }