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.time.Clock;
  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(AdderResults adderResults)
  21   {
  22     return new ApplicationRecordHandler(adderResults);
  23   }
  24
  25   @Bean
  26   public AdderResults adderResults()
  27   {
  28     return new AdderResults();
  29   }
  30
  31   @Bean
  32   public ApplicationRebalanceListener rebalanceListener(
  33       ApplicationRecordHandler recordHandler,
  34       AdderResults adderResults,
  35       StateRepository stateRepository,
  36       ApplicationProperties properties)
  37   {
  38     return new ApplicationRebalanceListener(
  39         recordHandler,
  40         adderResults,
  41         stateRepository,
  42         properties.getClientId());
  43   }
  44
  45   @Bean
  46   public EndlessConsumer<String, String> endlessConsumer(
  47       KafkaConsumer<String, String> kafkaConsumer,
  48       ExecutorService executor,
  49       ApplicationRebalanceListener rebalanceListener,
  50       ApplicationRecordHandler recordHandler,
  51       ApplicationProperties properties)
  52   {
  53     return
  54         new EndlessConsumer<>(
  55             executor,
  56             properties.getClientId(),
  57             properties.getTopic(),
  58             kafkaConsumer,
  59             rebalanceListener,
  60             recordHandler);
  61   }
  62
  63   @Bean
  64   public ExecutorService executor()
  65   {
  66     return Executors.newSingleThreadExecutor();
  67   }
  68
  69   @Bean(destroyMethod = "close")
  70   public KafkaConsumer<String, String> kafkaConsumer(ApplicationProperties properties)
  71   {
  72     Properties props = new Properties();
  73
  74     props.put("bootstrap.servers", properties.getBootstrapServer());
  75     props.put("partition.assignment.strategy", "org.apache.kafka.clients.consumer.CooperativeStickyAssignor");
  76     props.put("group.id", properties.getGroupId());
  77     props.put("client.id", properties.getClientId());
  78     props.put("auto.offset.reset", properties.getAutoOffsetReset());
  79     props.put("auto.commit.interval.ms", (int)properties.getCommitInterval().toMillis());
  80     props.put("metadata.max.age.ms", "1000");
  81     props.put("key.deserializer", StringDeserializer.class.getName());
  82     props.put("value.deserializer", StringDeserializer.class.getName());
  83
  84     return new KafkaConsumer<>(props);
  85   }
  86 }