Kafka回調函數

Controller

    /**
     * 回調方法中監控消息是否發送成功 或 失敗時做補償處理
     */
    @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("發送消息失敗：" + ex.getMessage());
            }
            @Override
            public void onSuccess(SendResult<String, Object> result) {
                System.out.println("發送消息成功：" + result.getRecordMetadata().topic() + "-"
                        + result.getRecordMetadata().partition() + "-" + result.getRecordMetadata().offset());
            }
        });
    }
}

消費者：

@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，內容為：" + message);
    }
}

結果：

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Kafka問題1：
win端查看topic內容，中文亂碼：
輸入：CHCP 65001

原因：kafka默認編碼是utf-8，但win10是gbk，所以中文亂碼，需在cmd下設置本機局部編碼格式位utf-8