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.KafkaConsumer;
   4 import org.apache.kafka.common.serialization.StringDeserializer;
   5 import org.springframework.boot.context.properties.EnableConfigurationProperties;
   6 import org.springframework.context.annotation.Bean;
   7 import org.springframework.context.annotation.Configuration;
   8
   9 import java.util.Optional;
  10 import java.util.Properties;
  11 import java.util.concurrent.ExecutorService;
  12 import java.util.concurrent.Executors;
  13
  14
  15 @Configuration
  16 @EnableConfigurationProperties(ApplicationProperties.class)
  17 public class ApplicationConfiguration
  18 {
  19   @Bean
  20   public ApplicationRecordHandler recordHandler(
  21       AdderResults adderResults,
  22       ApplicationProperties properties)
  23   {
  24     return new ApplicationRecordHandler(
  25         adderResults,
  26         Optional.ofNullable(properties.getThrottle()),
  27         properties.getClientId());
  28   }
  29
  30   @Bean
  31   public AdderResults adderResults()
  32   {
  33     return new AdderResults();
  34   }
  35
  36   @Bean
  37   public EndlessConsumer<String, String> endlessConsumer(
  38       KafkaConsumer<String, String> kafkaConsumer,
  39       ExecutorService executor,
  40       ApplicationRecordHandler recordHandler,
  41       ApplicationProperties properties)
  42   {
  43     return
  44         new EndlessConsumer<>(
  45             executor,
  46             properties.getClientId(),
  47             properties.getTopic(),
  48             kafkaConsumer,
  49             recordHandler);
  50   }
  51
  52   @Bean
  53   public ExecutorService executor()
  54   {
  55     return Executors.newSingleThreadExecutor();
  56   }
  57
  58   @Bean(destroyMethod = "close")
  59   public KafkaConsumer<String, String> kafkaConsumer(ApplicationProperties properties)
  60   {
  61     Properties props = new Properties();
  62
  63     props.put("bootstrap.servers", properties.getBootstrapServer());
  64     props.put("partition.assignment.strategy", "org.apache.kafka.clients.consumer.StickyAssignor");
  65     props.put("group.id", properties.getGroupId());
  66     props.put("client.id", properties.getClientId());
  67     props.put("auto.offset.reset", properties.getAutoOffsetReset());
  68     props.put("auto.commit.interval.ms", (int)properties.getCommitInterval().toMillis());
  69     props.put("metadata.max.age.ms", "1000");
  70     props.put("key.deserializer", StringDeserializer.class.getName());
  71     props.put("value.deserializer", StringDeserializer.class.getName());
  72
  73     return new KafkaConsumer<>(props);
  74   }
  75 }