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.LongDeserializer;
   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.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   {
  22     return new ApplicationRecordHandler();
  23   }
  24
  25   @Bean
  26   public EndlessConsumer<String, Long> endlessConsumer(
  27       KafkaConsumer<String, Long> kafkaConsumer,
  28       ExecutorService executor,
  29       ApplicationRecordHandler recordHandler,
  30       ApplicationProperties properties)
  31   {
  32     return
  33         new EndlessConsumer<>(
  34             executor,
  35             properties.getClientId(),
  36             properties.getTopic(),
  37             kafkaConsumer,
  38             recordHandler);
  39   }
  40
  41   @Bean
  42   public ExecutorService executor()
  43   {
  44     return Executors.newSingleThreadExecutor();
  45   }
  46
  47   @Bean(destroyMethod = "close")
  48   public KafkaConsumer<String, Long> kafkaConsumer(ApplicationProperties properties)
  49   {
  50     Properties props = new Properties();
  51
  52     props.put("bootstrap.servers", properties.getBootstrapServer());
  53     props.put("partition.assignment.strategy", "org.apache.kafka.clients.consumer.CooperativeStickyAssignor");
  54     props.put("group.id", properties.getGroupId());
  55     props.put("client.id", properties.getClientId());
  56     props.put("auto.offset.reset", properties.getAutoOffsetReset());
  57     props.put("auto.commit.interval.ms", (int)properties.getCommitInterval().toMillis());
  58     props.put("metadata.max.age.ms", "1000");
  59     props.put("key.deserializer", StringDeserializer.class.getName());
  60     props.put("value.deserializer", LongDeserializer.class.getName());
  61
  62     return new KafkaConsumer<>(props);
  63   }
  64 }