juplo.de Git - demos/kafka/training/blob - src/main/java/de/juplo/kafka/Application.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.SpringApplication;
   7 import org.springframework.boot.autoconfigure.SpringBootApplication;
   8 import org.springframework.boot.context.properties.EnableConfigurationProperties;
   9 import org.springframework.context.annotation.Bean;
  10
  11 import java.util.Properties;
  12 import java.util.concurrent.Executors;
  13
  14
  15 @SpringBootApplication
  16 @EnableConfigurationProperties(ApplicationProperties.class)
  17 public class Application
  18 {
  19   @Bean
  20   public EndlessConsumer endlessConsumer(
  21       KafkaConsumer<String, String> kafkaConsumer,
  22       ApplicationProperties properties)
  23   {
  24     EndlessConsumer consumer =
  25         new EndlessConsumer(
  26             Executors.newFixedThreadPool(1),
  27             properties.getClientId(),
  28             properties.getTopic(),
  29             kafkaConsumer);
  30
  31     consumer.start();
  32
  33     return consumer;
  34   }
  35
  36   @Bean(destroyMethod = "close")
  37   public KafkaConsumer<String, String> kafkaConsumer(ApplicationProperties properties)
  38   {
  39     Properties props = new Properties();
  40
  41     props.put("bootstrap.servers", properties.getBootstrapServer());
  42     props.put("group.id", properties.getGroupId());
  43     props.put("client.id", properties.getClientId());
  44     props.put("auto.offset.reset", properties.getAutoOffsetReset());
  45     props.put("metadata.max.age.ms", "1000");
  46     props.put("key.deserializer", StringDeserializer.class.getName());
  47     props.put("value.deserializer", LongDeserializer.class.getName());
  48
  49     return new KafkaConsumer<>(props);
  50   }
  51
  52
  53   public static void main(String[] args)
  54   {
  55     SpringApplication.run(Application.class, args);
  56   }
  57 }