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