Created
February 1, 2022 13:28
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Getting Started with Apache Kafka and Spring Boot
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| package com.example.kafka; | |
| import org.slf4j.Logger; | |
| import org.slf4j.LoggerFactory; | |
| import org.springframework.beans.factory.annotation.Autowired; | |
| import org.springframework.kafka.core.KafkaTemplate; | |
| import org.springframework.kafka.support.SendResult; | |
| import org.springframework.stereotype.Service; | |
| import org.springframework.util.concurrent.ListenableFuture; | |
| import org.springframework.util.concurrent.ListenableFutureCallback; | |
| @Service | |
| public class Producer { | |
| private static final String TOPIC = "purchases"; | |
| private static final Logger logger = LoggerFactory.getLogger(Producer.class); | |
| @Autowired | |
| private KafkaTemplate<String, String> kafkaTemplate; | |
| public void sendMessage(String key, String value) { | |
| ListenableFuture<SendResult<String, String>> future = kafkaTemplate.send(TOPIC, key, value); | |
| future.addCallback(new ListenableFutureCallback<SendResult<String, String>>() { | |
| @Override | |
| public void onSuccess(SendResult<String, String> result) { | |
| logger.info(String.format("Produced event to topic %s: key = %-10s value = %s", TOPIC, key, value)); | |
| } | |
| @Override | |
| public void onFailure(Throwable ex) { | |
| ex.printStackTrace(); | |
| } | |
| }); | |
| } | |
| } |
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