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KafkaProducerService.java
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KafkaProducerService.java
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package com.purnima.jain.service;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Value;
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;
import com.purnima.jain.avro.dto.PersonDto;
import com.purnima.jain.domain.model.Person;
@Service
public class KafkaProducerService implements ProducerService {
private static final Logger logger = LoggerFactory.getLogger(KafkaProducerService.class);
@Value("${spring.kafka.topic-name}")
private String topicName;
private KafkaTemplate<String, PersonDto> kafkaTemplate;
@Autowired
KafkaProducerService(KafkaTemplate<String, PersonDto> kafkaTemplate) {
this.kafkaTemplate = kafkaTemplate;
}
public void sendMessage(Person person) {
PersonDto personDto = PersonDto.newBuilder()
.setFirstName(person.getFirstName())
.setLastName(person.getLastName())
.build();
logger.info("Sending message to Kafka :: personDto :: {}", personDto);
ListenableFuture<SendResult<String, PersonDto>> future = kafkaTemplate.send(topicName, personDto);
future.addCallback(new ListenableFutureCallback<SendResult<String, PersonDto>>() {
@Override
public void onSuccess(SendResult<String, PersonDto> result) {
logger.info("Sent message=[" + personDto + "] with offset=[" + result.getRecordMetadata().offset() + "]");
}
@Override
public void onFailure(Throwable ex) {
logger.info("Unable to send message=[" + personDto + "] due to : " + ex.getMessage());
}
});
}
}