juplo.de Git - demos/kafka/wordcount/blob - src/main/java/de/juplo/kafka/wordcount/splitter/SplitterApplication.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.common.serialization.Serdes;
   6 import org.apache.kafka.streams.StreamsConfig;
   7 import org.springframework.boot.SpringApplication;
   8 import org.springframework.boot.autoconfigure.SpringBootApplication;
   9 import org.springframework.boot.context.properties.EnableConfigurationProperties;
  10 import org.springframework.context.ConfigurableApplicationContext;
  11 import org.springframework.context.annotation.Bean;
  12 import org.springframework.kafka.support.serializer.JsonDeserializer;
  13 import org.springframework.kafka.support.serializer.JsonSerde;
  14 import org.springframework.kafka.support.serializer.JsonSerializer;
  15
  16 import java.util.Properties;
  17 import java.util.concurrent.CompletableFuture;
  18
  19 import static org.apache.kafka.streams.errors.StreamsUncaughtExceptionHandler.StreamThreadExceptionResponse.SHUTDOWN_CLIENT;
  20
  21
  22 @SpringBootApplication
  23 @EnableConfigurationProperties(SplitterApplicationProperties.class)
  24 @Slf4j
  25 public class SplitterApplication
  26 {
  27         @Bean(initMethod = "start", destroyMethod = "stop")
  28         public SplitterStreamProcessor streamProcessor(
  29                         SplitterApplicationProperties properties,
  30                         ConfigurableApplicationContext context)
  31         {
  32                 Properties propertyMap = new Properties();
  33
  34                 propertyMap.put(StreamsConfig.APPLICATION_ID_CONFIG, properties.getApplicationId());
  35                 propertyMap.put(StreamsConfig.BOOTSTRAP_SERVERS_CONFIG, properties.getBootstrapServer());
  36                 propertyMap.put(StreamsConfig.DEFAULT_KEY_SERDE_CLASS_CONFIG, Serdes.StringSerde.class.getName());
  37                 propertyMap.put(StreamsConfig.DEFAULT_VALUE_SERDE_CLASS_CONFIG, JsonSerde.class.getName());
  38                 propertyMap.put(JsonDeserializer.TRUSTED_PACKAGES, Recording.class.getName()    );
  39                 propertyMap.put(JsonDeserializer.VALUE_DEFAULT_TYPE, Recording.class.getName());
  40                 propertyMap.put(JsonSerializer.ADD_TYPE_INFO_HEADERS, false);
  41                 propertyMap.put(ConsumerConfig.AUTO_OFFSET_RESET_CONFIG, "earliest");
  42
  43                 SplitterStreamProcessor streamProcessor = new SplitterStreamProcessor(
  44                                 properties.getInputTopic(),
  45                                 properties.getOutputTopic(),
  46                                 propertyMap);
  47
  48                 streamProcessor.streams.setUncaughtExceptionHandler((Throwable e) ->
  49         {
  50                 log.error("Unexpected error!", e);
  51                 CompletableFuture.runAsync(() ->
  52                 {
  53                         log.info("Stopping application...");
  54                         SpringApplication.exit(context, () -> 1);
  55                 });
  56                 return SHUTDOWN_CLIENT;
  57         });
  58
  59
  60                 return streamProcessor;
  61         }
  62
  63         public static void main(String[] args)
  64         {
  65                 SpringApplication.run(SplitterApplication.class, args);
  66         }
  67 }