juplo.de Git - demos/kafka/wordcount/blob - src/main/java/de/juplo/kafka/wordcount/top10/Top10ApplicationConfiguration.java

   1 package de.juplo.kafka.wordcount.top10;
   2
   3 import lombok.extern.slf4j.Slf4j;
   4 import org.apache.kafka.clients.consumer.ConsumerConfig;
   5 import org.apache.kafka.streams.StreamsConfig;
   6 import org.springframework.boot.SpringApplication;
   7 import org.springframework.boot.context.properties.EnableConfigurationProperties;
   8 import org.springframework.context.ConfigurableApplicationContext;
   9 import org.springframework.context.annotation.Bean;
  10 import org.springframework.context.annotation.Configuration;
  11 import org.springframework.kafka.support.serializer.JsonDeserializer;
  12 import org.springframework.kafka.support.serializer.JsonSerde;
  13 import org.springframework.kafka.support.serializer.JsonSerializer;
  14
  15 import java.util.Properties;
  16 import java.util.concurrent.CompletableFuture;
  17
  18 import static org.apache.kafka.streams.errors.StreamsUncaughtExceptionHandler.StreamThreadExceptionResponse.SHUTDOWN_CLIENT;
  19
  20
  21 @Configuration
  22 @EnableConfigurationProperties(Top10ApplicationProperties.class)
  23 @Slf4j
  24 public class Top10ApplicationConfiguration
  25 {
  26         @Bean
  27         public Properties streamProcessorProperties(Top10ApplicationProperties properties)
  28         {
  29                 Properties props = new Properties();
  30
  31                 props.put(StreamsConfig.APPLICATION_ID_CONFIG, properties.getApplicationId());
  32                 props.put(StreamsConfig.BOOTSTRAP_SERVERS_CONFIG, properties.getBootstrapServer());
  33                 props.put(StreamsConfig.DEFAULT_KEY_SERDE_CLASS_CONFIG, JsonSerde.class.getName());
  34                 props.put(StreamsConfig.DEFAULT_VALUE_SERDE_CLASS_CONFIG, JsonSerde.class.getName());
  35                 props.put(JsonDeserializer.TRUSTED_PACKAGES, Top10Application.class.getPackageName());
  36                 props.put(JsonDeserializer.KEY_DEFAULT_TYPE, String.class.getName());
  37                 props.put(JsonDeserializer.VALUE_DEFAULT_TYPE, Ranking.class.getName());
  38                 props.put(
  39                                 JsonDeserializer.TYPE_MAPPINGS,
  40                                 "word:" + Key.class.getName() + "," +
  41                                 "counter:" + Entry.class.getName());
  42                 props.put(JsonDeserializer.REMOVE_TYPE_INFO_HEADERS, Boolean.FALSE);
  43                 props.put(
  44                                 JsonSerializer.TYPE_MAPPINGS,
  45                                 "ranking:" + Ranking.class.getName());
  46                 props.put(ConsumerConfig.AUTO_OFFSET_RESET_CONFIG, "earliest");
  47
  48                 return props;
  49         }
  50
  51         @Bean(initMethod = "start", destroyMethod = "stop")
  52         public Top10StreamProcessor streamProcessor(
  53                         Top10ApplicationProperties applicationProperties,
  54                         Properties streamProcessorProperties,
  55                         ConfigurableApplicationContext context)
  56         {
  57                 Top10StreamProcessor streamProcessor = new Top10StreamProcessor(
  58                                 applicationProperties.getInputTopic(),
  59                                 applicationProperties.getOutputTopic(),
  60                                 streamProcessorProperties);
  61
  62                 streamProcessor.streams.setUncaughtExceptionHandler((Throwable e) ->
  63                 {
  64                         log.error("Unexpected error!", e);
  65                         CompletableFuture.runAsync(() ->
  66                         {
  67                                 log.info("Stopping application...");
  68                                 SpringApplication.exit(context, () -> 1);
  69                         });
  70                         return SHUTDOWN_CLIENT;
  71                 });
  72
  73                 return streamProcessor;
  74         }
  75 }