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.time.Clock;
  11 import java.util.Properties;
  12 import java.util.concurrent.ExecutorService;
  13 import java.util.concurrent.Executors;
  14
  15
  16 @Configuration
  17 @EnableConfigurationProperties(ApplicationProperties.class)
  18 public class ApplicationConfiguration
  19 {
  20   @Bean
  21   public KeyCountingRecordHandler keyCountingRecordHandler()
  22   {
  23     return new KeyCountingRecordHandler();
  24   }
  25
  26   @Bean
  27   public KeyCountingRebalanceListener keyCountingRebalanceListener(
  28       KeyCountingRecordHandler keyCountingRecordHandler,
  29       PartitionStatisticsRepository repository,
  30       ApplicationProperties properties)
  31   {
  32     return new KeyCountingRebalanceListener(
  33         keyCountingRecordHandler,
  34         repository,
  35         properties.getClientId(),
  36         Clock.systemDefaultZone(),
  37         properties.getCommitInterval());
  38   }
  39
  40   @Bean
  41   public EndlessConsumer<String, Long> endlessConsumer(
  42       KafkaConsumer<String, Long> kafkaConsumer,
  43       ExecutorService executor,
  44       KeyCountingRebalanceListener keyCountingRebalanceListener,
  45       KeyCountingRecordHandler keyCountingRecordHandler,
  46       ApplicationProperties properties)
  47   {
  48     return
  49         new EndlessConsumer<>(
  50             executor,
  51             properties.getClientId(),
  52             properties.getTopic(),
  53             kafkaConsumer,
  54             keyCountingRebalanceListener,
  55             keyCountingRecordHandler);
  56   }
  57
  58   @Bean
  59   public ExecutorService executor()
  60   {
  61     return Executors.newSingleThreadExecutor();
  62   }
  63
  64   @Bean(destroyMethod = "close")
  65   public KafkaConsumer<String, Long> kafkaConsumer(ApplicationProperties properties)
  66   {
  67     Properties props = new Properties();
  68
  69     props.put("bootstrap.servers", properties.getBootstrapServer());
  70     props.put("partition.assignment.strategy", "org.apache.kafka.clients.consumer.CooperativeStickyAssignor");
  71     props.put("group.id", properties.getGroupId());
  72     props.put("client.id", properties.getClientId());
  73     props.put("auto.offset.reset", properties.getAutoOffsetReset());
  74     props.put("auto.commit.interval.ms", (int)properties.getCommitInterval().toMillis());
  75     props.put("metadata.max.age.ms", "1000");
  76     props.put("key.deserializer", StringDeserializer.class.getName());
  77     props.put("value.deserializer", LongDeserializer.class.getName());
  78
  79     return new KafkaConsumer<>(props);
  80   }
  81 }