kafka消费

https://blog.csdn.net/AlbenXie/article/details/120341867
配置

// 设置为批量消费，每个批次数量在Kafka配置参数中设置
factory.setBatchListener(true);

type: batch
------------------------

concurrency: 在消费的时候，一共生成n个消费者来消费消息，类似于多线程，但数量一般小于等于分区数

public void listenBatch2(ConsumerRecord<String,String> record, Acknowledgment acknowledgment) {

@KafkaListener(topics = "#{kafkaConfig.topicName}")

//    public void listen3(ConsumerRecord<String,String> record, Acknowledgment acknowledgment){

//    @KafkaListener(topics = "testkafka", concurrency = "3")
    public void listenBatch1(List<ConsumerRecord<String, String>> record, Acknowledgment acknowledgment) {

String msg = record.value();

//    @KafkaListener(topics = "topic2", concurrency = "3", groupId = "0")
    public void listenRealtimeData2(String msg, Acknowledgment acknowledgment) {

// 转换为对象
JSONArray jsonArray = JSON.parseArray(msg);
XXX xxxList = jsonArray.toJavaList(XXX.class);

ListenableFuture<SendResult<String, String>> send =

kafkaTemplate.send("test-topic", JSONObject.toJSONString(对象));

//                    send.addCallback(new ListenableFutureCallback<SendResult<String, String>>() {
//                        //发送消息成功回调
//                        @Override
//                        public void onSuccess(SendResult<String, String> result) {
                            //getRecordMetadata里面存在发送的topic和partition等信息
//                            String topic = result.getRecordMetadata().topic();
//                            int partition = result.getRecordMetadata().partition();
//                            long offset = result.getRecordMetadata().offset();
//                            log.info("发送消息成功回调topic->：" + topic + "-partition=" + partition + "-offset=" + offset);
//                        }
//                        //发送消息失败回调
//                        @Override
//                        public void onFailure(Throwable ex) {
//                            log.info("发送消息失败回调=：" + ex.getMessage());
//                        }
//                    });

@KafkaListener(containerFactory ="firstKafkaListenerContainerFactory", topics = "topic1",
        concurrency = "3", groupId = "a8")
public void listenTermAlarmBatch(List<String> msg, Acknowledgment acknowledgment) {

for(String jsonStr : msg) {

JSONArray jsonArray = JSON.parseArray(jsonStr);
XXXX xxxList= jsonArray.toJavaList(XXXX.class);

for (XXXX xxx: xxxList) {

---

根据key,对应处理

//        String msg = record.value();
//        JSONObject jsMsg = JSON.parseObject(msg);
//        for (Map.Entry<String, Object> entry : jsMsg.entrySet()) {
//            ProtocolTypeEnum protocolTypeEnum = ProtocolTypeEnum.valueOf(entry.getKey());
//            protocolTypeEnum.preHandle(entry.getValue().toString());
//        }