juplo.de Git - demos/kafka/training/blob - src/main/java/de/juplo/kafka/Application.java

   1 package de.juplo.kafka;
   2
   3 import lombok.extern.slf4j.Slf4j;
   4 import org.apache.kafka.clients.consumer.Consumer;
   5 import org.springframework.beans.factory.annotation.Autowired;
   6 import org.springframework.boot.ApplicationArguments;
   7 import org.springframework.boot.ApplicationRunner;
   8 import org.springframework.boot.SpringApplication;
   9 import org.springframework.boot.autoconfigure.SpringBootApplication;
  10 import org.springframework.context.annotation.Bean;
  11 import org.springframework.kafka.core.ConsumerFactory;
  12
  13 import javax.annotation.PreDestroy;
  14 import java.util.concurrent.ExecutorService;
  15 import java.util.concurrent.TimeUnit;
  16
  17
  18 @SpringBootApplication
  19 @Slf4j
  20 public class Application implements ApplicationRunner
  21 {
  22   @Autowired
  23   Consumer<String, Message> consumer;
  24   @Autowired
  25   SimpleConsumer simpleConsumer;
  26
  27
  28   @Override
  29   public void run(ApplicationArguments args) throws Exception
  30   {
  31     log.info("Starting EndlessConsumer");
  32     simpleConsumer.start();
  33   }
  34
  35   @PreDestroy
  36   public void shutdown()
  37   {
  38     log.info("Signaling the consumer to quit its work");
  39     consumer.wakeup();
  40   }
  41
  42   @Bean(destroyMethod = "close")
  43   public Consumer<String, Message> kafkaConsumer(ConsumerFactory<String, Message> factory)
  44   {
  45     return factory.createConsumer();
  46   }
  47
  48
  49   public static void main(String[] args)
  50   {
  51     SpringApplication.run(Application.class, args);
  52   }
  53 }