juplo.de Git - demos/kafka/wordcount/blob - src/main/java/de/juplo/kafka/wordcount/splitter/SplitterApplicationConfiguration.java

   1 package de.juplo.kafka.wordcount.splitter;
   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(SplitterApplicationProperties.class)
  23 @Slf4j
  24 public class SplitterApplicationConfiguration
  25 {
  26         @Bean(initMethod = "start", destroyMethod = "stop")
  27         public SplitterStreamProcessor streamProcessor(
  28                         SplitterApplicationProperties properties,
  29                         Properties streamProcessorProperties,
  30                         ConfigurableApplicationContext context)
  31         {
  32                 SplitterStreamProcessor streamProcessor = new SplitterStreamProcessor(
  33                                 properties.getInputTopic(),
  34                                 properties.getOutputTopic(),
  35                                 streamProcessorProperties);
  36
  37                 streamProcessor.streams.setUncaughtExceptionHandler((Throwable e) ->
  38                 {
  39                         log.error("Unexpected error!", e);
  40                         CompletableFuture.runAsync(() ->
  41                         {
  42                                 log.info("Stopping application...");
  43                                 SpringApplication.exit(context, () -> 1);
  44                         });
  45                         return SHUTDOWN_CLIENT;
  46                 });
  47
  48                 return streamProcessor;
  49         }
  50
  51         @Bean
  52         public Properties streamProcessorProperties(
  53                         SplitterApplicationProperties applicationProperties)
  54         {
  55                 Properties properties = serializationConfig();
  56
  57                 properties.put(StreamsConfig.APPLICATION_ID_CONFIG, applicationProperties.getApplicationId());
  58                 properties.put(StreamsConfig.BOOTSTRAP_SERVERS_CONFIG, applicationProperties.getBootstrapServer());
  59                 properties.put(ConsumerConfig.AUTO_OFFSET_RESET_CONFIG, "earliest");
  60
  61                 return properties;
  62         }
  63
  64         static Properties serializationConfig()
  65         {
  66                 Properties properties = new Properties();
  67
  68                 properties.put(StreamsConfig.DEFAULT_KEY_SERDE_CLASS_CONFIG, JsonSerde.class.getName());
  69                 properties.put(StreamsConfig.DEFAULT_VALUE_SERDE_CLASS_CONFIG, JsonSerde.class.getName());
  70                 properties.put(JsonDeserializer.KEY_DEFAULT_TYPE, User.class.getName());
  71                 properties.put(JsonDeserializer.VALUE_DEFAULT_TYPE, Recording.class.getName());
  72                 properties.put(JsonSerializer.ADD_TYPE_INFO_HEADERS, false);
  73
  74                 return properties;
  75         }
  76 }