Question

我正在从VM上托管的Spring boot rest api向我的Kafka主题发送一条简单消息。当它运行时，我将得到预期的正常响应，并将该响应发送到前端，但是当kafka未运行时，它也会向前移动而不会给出异常，从而发送响应。

我已经尝试过接收响应并设置超时时间

SendResult<String, String> result=kafkaTemplate.send(kafkaTopic, message).get(5, TimeUnit.SECONDS);

logger.debug("result set returned:"+result.toString()+" also"+result.hashCode());
if (result.hashCode()>0)
     return ServiceResponse.createSuccessResponse();
else {
     response.setError("Server timeout error");
     return response;
}

这是我完整的代码：

@CrossOrigin
@RequestMapping(value="/start", method= RequestMethod.GET, headers="Accept=application/json")
public ServiceResponse startWork(@RequestParam("message") String message) {

    ServiceResponse response=null;

    try {
         response=new ServiceResponse();    
         Map<String, Object> props = new HashMap<>();
         props.put(ProducerConfig.BOOTSTRAP_SERVERS_CONFIG, kafkaURL);
         props.put("acks","all");
         props.put("retries", 0);
         props.put(ProducerConfig.KEY_SERIALIZER_CLASS_CONFIG, StringSerializer.class);
         props.put(ProducerConfig.VALUE_SERIALIZER_CLASS_CONFIG, StringSerializer.class);

         ProducerFactory<String, String> producerFactory=new DefaultKafkaProducerFactory<>(props);

         KafkaTemplate<String, String> kafkaTemplate = new KafkaTemplate<>(producerFactory);

         logger.debug("Sending meesage to kafka topic :"+kafkaTopic+" url is "+kafkaURL);
         SendResult<String, String> result=kafkaTemplate.send(kafkaTopic, message).get(5, TimeUnit.SECONDS);


         logger.debug("result set returned:"+result.toString()+" also"+result.hashCode());
         if (result.hashCode()>0)
             return ServiceResponse.createSuccessResponse();
         else
         {
             response.setError("Server timeout error");
             return response;
         }       
    } catch(Exception e) {
          response.setError("Couldn't send to kafka topic");
          return response;
    }

}

但是每次我在前端获得成功响应时，都会出现否错误。结果，我每次都会得到一个长的正整数。因此，如果成功阻止，那就去。

Spring Kafka确认并处理错误

0 个答案: