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 com.fasterxml.jackson.databind.ObjectMapper;
   4 import lombok.extern.slf4j.Slf4j;
   5 import org.apache.kafka.clients.consumer.ConsumerConfig;
   6 import org.apache.kafka.streams.StreamsConfig;
   7 import org.springframework.boot.SpringApplication;
   8 import org.springframework.boot.context.properties.EnableConfigurationProperties;
   9 import org.springframework.context.ConfigurableApplicationContext;
  10 import org.springframework.context.annotation.Bean;
  11 import org.springframework.context.annotation.Configuration;
  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 @Configuration
  23 @EnableConfigurationProperties(Top10ApplicationProperties.class)
  24 @Slf4j
  25 public class Top10ApplicationConfiguration
  26 {
  27         @Bean
  28         public Properties streamProcessorProperties(Top10ApplicationProperties properties)
  29         {
  30                 Properties props = new Properties();
  31
  32                 props.put(StreamsConfig.APPLICATION_ID_CONFIG, properties.getApplicationId());
  33                 props.put(StreamsConfig.BOOTSTRAP_SERVERS_CONFIG, properties.getBootstrapServer());
  34                 props.put(StreamsConfig.DEFAULT_KEY_SERDE_CLASS_CONFIG, JsonSerde.class.getName());
  35                 props.put(StreamsConfig.DEFAULT_VALUE_SERDE_CLASS_CONFIG, JsonSerde.class.getName());
  36                 props.put(JsonSerializer.ADD_TYPE_INFO_HEADERS, false);
  37                 props.put(JsonDeserializer.TRUSTED_PACKAGES, Top10Application.class.getPackageName());
  38                 props.put(JsonDeserializer.KEY_DEFAULT_TYPE, Word.class.getName());
  39                 props.put(JsonDeserializer.VALUE_DEFAULT_TYPE, Counter.class.getName());
  40                 props.put(JsonDeserializer.USE_TYPE_INFO_HEADERS, false);
  41                 props.put(ConsumerConfig.AUTO_OFFSET_RESET_CONFIG, "earliest");
  42
  43                 return props;
  44         }
  45
  46         @Bean(initMethod = "start", destroyMethod = "stop")
  47         public Top10StreamProcessor streamProcessor(
  48                         Top10ApplicationProperties applicationProperties,
  49                         Properties streamProcessorProperties,
  50                         ConfigurableApplicationContext context)
  51         {
  52                 Top10StreamProcessor streamProcessor = new Top10StreamProcessor(
  53                                 applicationProperties.getInputTopic(),
  54                                 applicationProperties.getOutputTopic(),
  55                                 streamProcessorProperties);
  56
  57                 streamProcessor.streams.setUncaughtExceptionHandler((Throwable e) ->
  58                 {
  59                         log.error("Unexpected error!", e);
  60                         CompletableFuture.runAsync(() ->
  61                         {
  62                                 log.info("Stopping application...");
  63                                 SpringApplication.exit(context, () -> 1);
  64                         });
  65                         return SHUTDOWN_CLIENT;
  66                 });
  67
  68                 return streamProcessor;
  69         }
  70 }