1 package de.juplo.kafka;
3 import lombok.extern.slf4j.Slf4j;
4 import org.springframework.beans.factory.annotation.Autowired;
5 import org.springframework.boot.ApplicationArguments;
6 import org.springframework.boot.ApplicationRunner;
7 import org.springframework.boot.SpringApplication;
8 import org.springframework.boot.autoconfigure.SpringBootApplication;
9 import org.springframework.kafka.core.KafkaTemplate;
10 import org.springframework.kafka.support.SendResult;
11 import org.springframework.util.concurrent.ListenableFuture;
16 @SpringBootApplication
17 public class Application implements ApplicationRunner
20 KafkaTemplate<String, String> kafkaTemplate;
23 void send(String key, String value)
25 ListenableFuture<SendResult<String, String>> listenableFuture =
26 kafkaTemplate.sendDefault(key, value);
28 listenableFuture.addCallback(
30 "Sent {}={} to partition={}, offset={}",
31 result.getProducerRecord().key(),
32 result.getProducerRecord().value(),
33 result.getRecordMetadata().partition(),
34 result.getRecordMetadata().offset()),
35 e -> log.error("ERROR sendig message", e));
39 public void run(ApplicationArguments args)
41 for (int i = 0; i < 100; i++)
43 send(Long.toString(i%10), Long.toString(i));
48 public static void main(String[] args)
50 SpringApplication.run(Application.class, args);