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 KeyCountingRecordHandler keyCountingRecordHandler()
  21   {
  22     return new KeyCountingRecordHandler();
  23   }
  24
  25   @Bean
  26   public KeyCountingRebalanceListener keyCountingRebalanceListener(
  27       KeyCountingRecordHandler keyCountingRecordHandler,
  28       ApplicationProperties properties)
  29   {
  30     return new KeyCountingRebalanceListener(
  31         keyCountingRecordHandler,
  32         properties.getClientId());
  33   }
  34
  35   @Bean
  36   public EndlessConsumer<String, Long> endlessConsumer(
  37       KafkaConsumer<String, Long> kafkaConsumer,
  38       ExecutorService executor,
  39       KeyCountingRebalanceListener keyCountingRebalanceListener,
  40       KeyCountingRecordHandler keyCountingRecordHandler,
  41       ApplicationProperties properties)
  42   {
  43     return
  44         new EndlessConsumer<>(
  45             executor,
  46             properties.getClientId(),
  47             properties.getTopic(),
  48             kafkaConsumer,
  49             keyCountingRebalanceListener,
  50             keyCountingRecordHandler);
  51   }
  52
  53   @Bean
  54   public ExecutorService executor()
  55   {
  56     return Executors.newSingleThreadExecutor();
  57   }
  58
  59   @Bean(destroyMethod = "close")
  60   public KafkaConsumer<String, Long> kafkaConsumer(ApplicationProperties properties)
  61   {
  62     Properties props = new Properties();
  63
  64     props.put("bootstrap.servers", properties.getBootstrapServer());
  65     props.put("partition.assignment.strategy", "org.apache.kafka.clients.consumer.CooperativeStickyAssignor");
  66     props.put("group.id", properties.getGroupId());
  67     props.put("client.id", properties.getClientId());
  68     props.put("auto.offset.reset", properties.getAutoOffsetReset());
  69     props.put("auto.commit.interval.ms", (int)properties.getCommitInterval().toMillis());
  70     props.put("metadata.max.age.ms", "1000");
  71     props.put("key.deserializer", StringDeserializer.class.getName());
  72     props.put("value.deserializer", LongDeserializer.class.getName());
  73
  74     return new KafkaConsumer<>(props);
  75   }
  76 }