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 org.springframework.boot.SpringApplication;
   4 import org.springframework.boot.autoconfigure.SpringBootApplication;
   5 import org.springframework.boot.context.properties.EnableConfigurationProperties;
   6 import org.springframework.context.annotation.Bean;
   7 import org.springframework.expression.common.LiteralExpression;
   8 import org.springframework.integration.annotation.InboundChannelAdapter;
   9 import org.springframework.integration.annotation.ServiceActivator;
  10 import org.springframework.integration.config.EnableIntegration;
  11 import org.springframework.integration.kafka.inbound.KafkaMessageSource;
  12 import org.springframework.integration.kafka.outbound.KafkaProducerMessageHandler;
  13 import org.springframework.kafka.core.ConsumerFactory;
  14 import org.springframework.kafka.core.KafkaTemplate;
  15 import org.springframework.kafka.listener.ConsumerProperties;
  16 import org.springframework.messaging.MessageHandler;
  17
  18
  19 @SpringBootApplication
  20 @EnableConfigurationProperties(SplitterApplicationProperties.class)
  21 @EnableIntegration
  22 public class SplitterApplication
  23 {
  24         @InboundChannelAdapter(channel = "recordings")
  25         @Bean
  26         KafkaMessageSource<String, String> source(
  27                         ConsumerFactory<String, String> cf,
  28                         SplitterApplicationProperties properties)
  29         {
  30                 return new KafkaMessageSource<>(cf, new ConsumerProperties(properties.getInputTopic()));
  31         }
  32
  33         @Bean
  34         @ServiceActivator(inputChannel = "words")
  35         MessageHandler handler(
  36                         KafkaTemplate<String, String> kafkaTemplate,
  37                         SplitterApplicationProperties properties)
  38         {
  39                 KafkaProducerMessageHandler<String, String> handler =
  40                                 new KafkaProducerMessageHandler<>(kafkaTemplate);
  41                 handler.setTopicExpression(new LiteralExpression(properties.getOutputTopic()));
  42                 return handler;
  43         }
  44
  45         public static void main(String[] args)
  46         {
  47                 SpringApplication.run(SplitterApplication.class, args);
  48         }
  49 }