Kafka回调函数

Controller

    /**
     * 回调方法中监控消息是否发送成功 或 失败时做补偿处理
     */
    @GetMapping("/callback/{message}")
    public String sendMessageCallback(@PathVariable("message") String callbackMessage) {
        kafkaProducer.sendMessageCallback(callbackMessage);
        return "niu bi a";
    }

Service :kafka producer

    /**
     * callback
     */
    public void sendMessageCallback(String callbackMessage) {
        kafkaTemplate.send("topic1", callbackMessage).addCallback(new ListenableFutureCallback<SendResult<String, Object>>() {
            @Override
            public void onFailure(Throwable ex) {
                System.out.println("发送消息失败：" + ex.getMessage());
            }
            @Override
            public void onSuccess(SendResult<String, Object> result) {
                System.out.println("发送消息成功：" + result.getRecordMetadata().topic() + "-"
                        + result.getRecordMetadata().partition() + "-" + result.getRecordMetadata().offset());
            }
        });
    }
}

消费者：

@Service
public class KafkaConsumer3 {
    @KafkaListener(topics = "topic1", groupId = KafkaConstants.KAFKA_GROUP_ID_THREE)
    public void receiveTopicMessage(String message) {
        System.out.println("KafkaConsumer3 ---> receiveTopicMessage：接收消息，内容为：" + message);
    }
}

结果：

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Kafka问题1：
win端查看topic内容，中文乱码：
输入：CHCP 65001

原因：kafka默认编码是utf-8，但win10是gbk，所以中文乱码，需在cmd下设置本机局部编码格式位utf-8