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.ConsumerRecord;
   4 import org.apache.kafka.clients.consumer.KafkaConsumer;
   5 import org.apache.kafka.common.serialization.LongDeserializer;
   6 import org.apache.kafka.common.serialization.StringDeserializer;
   7 import org.springframework.boot.context.properties.EnableConfigurationProperties;
   8 import org.springframework.context.annotation.Bean;
   9 import org.springframework.context.annotation.Configuration;
  10
  11 import java.time.Clock;
  12 import java.util.Properties;
  13 import java.util.concurrent.ExecutorService;
  14 import java.util.concurrent.Executors;
  15 import java.util.function.Consumer;
  16
  17
  18 @Configuration
  19 @EnableConfigurationProperties(ApplicationProperties.class)
  20 public class ApplicationConfiguration
  21 {
  22   @Bean
  23   public Consumer<ConsumerRecord<String, Long>> consumer()
  24   {
  25     return (record) ->
  26     {
  27       // Handle record
  28     };
  29   }
  30
  31   @Bean
  32   public EndlessConsumer<String, Long> endlessConsumer(
  33       KafkaConsumer<String, Long> kafkaConsumer,
  34       ExecutorService executor,
  35       Consumer<ConsumerRecord<String, Long>> handler,
  36       PartitionStatisticsRepository repository,
  37       ApplicationProperties properties)
  38   {
  39     return
  40         new EndlessConsumer<>(
  41             executor,
  42             repository,
  43             properties.getClientId(),
  44             properties.getTopic(),
  45             Clock.systemDefaultZone(),
  46             properties.getCommitInterval(),
  47             kafkaConsumer,
  48             handler);
  49   }
  50
  51   @Bean
  52   public ExecutorService executor()
  53   {
  54     return Executors.newSingleThreadExecutor();
  55   }
  56
  57   @Bean(destroyMethod = "close")
  58   public KafkaConsumer<String, Long> kafkaConsumer(ApplicationProperties properties)
  59   {
  60     Properties props = new Properties();
  61
  62     props.put("bootstrap.servers", properties.getBootstrapServer());
  63     props.put("partition.assignment.strategy", "org.apache.kafka.clients.consumer.CooperativeStickyAssignor");
  64     props.put("group.id", properties.getGroupId());
  65     props.put("client.id", properties.getClientId());
  66     props.put("enable.auto.commit", false);
  67     props.put("auto.offset.reset", properties.getAutoOffsetReset());
  68     props.put("metadata.max.age.ms", "1000");
  69     props.put("key.deserializer", StringDeserializer.class.getName());
  70     props.put("value.deserializer", LongDeserializer.class.getName());
  71
  72     return new KafkaConsumer<>(props);
  73   }
  74 }