Spring Boot FeignClient 如何捕獲業務異常信息
Spring Boot FeignClient 捕獲業務異常信息
因項目重構采用spring cloud,feign不可避免。目前spring cloud在國內還不是很成熟,所以踩坑是免不瞭的。最近處理全局異常的問題,搜瞭個遍也沒找到合適的解決方案
1.全局異常處理
import com.bossien.common.comm.entity.ResponseDto; import org.slf4j.Logger; import org.slf4j.LoggerFactory; import org.springframework.web.bind.annotation.ControllerAdvice; import org.springframework.web.bind.annotation.ExceptionHandler; import org.springframework.web.bind.annotation.ResponseBody; @ControllerAdvice public class GlobalExceptionHandler { private static final Logger logger = LoggerFactory.getLogger(GlobalExceptionHandler.class); /** * @Author: lixg * @Description: 系統異常捕獲處理 */ @ResponseBody @ExceptionHandler(value = Exception.class) public ResponseDto errorExceptionHandler(Exception ex) {//APIResponse是項目中對外統一的出口封裝,可以根據自身項目的需求做相應更改 logger.error("捕獲到 Exception 異常", ex); //異常日志入庫 return new ResponseDto(ResponseDto.RESPONSE_FAIL, "系統繁忙,請稍後再試"); } /** * @Author: lixg * @Description: 自定義異常捕獲處理 */ @ResponseBody @ExceptionHandler(value = BusinessException.class)//BusinessException是自定義的一個異常 public ResponseDto businessExceptionHandler(BusinessException ex) { logger.error("捕獲到 BusinessException 異常: code=" + ex.getCode() + " , errorMessage=" + ex.getErrorMessage()); return new ResponseDto(ex.getCode(), ex.getErrorMessage()); } }
2.請求參數解析handler
import com.alibaba.fastjson.JSONObject; import com.ocean.common.comm.entity.ResponseDto; import com.ocean.common.core.exception.BusinessException; import org.slf4j.Logger; import org.slf4j.LoggerFactory; /*** * @author lixg * * feign請求響應對象處理 */ public class ResponseHandler { private final static Logger logger = LoggerFactory.getLogger(ResponseHandler.class); /** * 解析請求響應對象 * @param responseDto * @param clazz * @return * @throws BusinessException */ public static Object getResponseData(ResponseDto responseDto, Class clazz) throws BusinessException { if(EmptyUtil.isEmpty(responseDto)){ throw new BusinessException(BusinessException.OBJECT_IS_NULL,"請求響應為空!"); } if(ResponseDto.RESPONSE_SUCCESS.equals(responseDto.getCode())){ try { String json = JSONObject.toJSONString(responseDto.getData()); return JSONObject.parseObject(json, clazz); }catch (Exception e){ logger.error("響應對象轉換異常:"+clazz.getName(),e); throw new BusinessException(BusinessException.OBJECT_IS_NULL,"響應對象轉換失敗!"); } }else{ throw new BusinessException(responseDto.getCode(),responseDto.getMessage()); } } }
3.業務feign接口
package com.bossien.usercenter.user.feign; import com.bossien.common.comm.entity.ResponseDto; import com.bossien.common.comm.util.PageModel; import com.bossien.common.comm.constant.SearchEntity; import com.bossien.common.core.exception.BusinessException; import com.bossien.usercenter.user.entity.User; import org.springframework.cloud.openfeign.FeignClient; import org.springframework.stereotype.Repository; import org.springframework.web.bind.annotation.RequestBody; import org.springframework.web.bind.annotation.RequestMapping; import org.springframework.web.bind.annotation.RequestMethod; import org.springframework.web.bind.annotation.RequestParam; import java.util.List; import java.util.Map; @FeignClient(value="bossien-usercenter-service",path = "/userFeign") @Repository public interface UserFeign { @RequestMapping(value = "getUserInfo",method = RequestMethod.GET) User getUserInfo(@RequestParam("userId") Long userId); @RequestMapping(value = "getUserInfoByTicket",method = RequestMethod.GET) ResponseDto getUserInfoByTicket(@RequestParam("ticket") String ticket) throws BusinessException; }
總結:
@controllerAdvice或者HandlerExceptionResolver是不能直接捕獲到FeignException,所以需要在Feign層面拿到具體異常重新封裝。最後總算把cloud service內部的異常安全(一樣的錯誤碼、一樣的錯誤信息)送給瞭client!!
Feign調用異常處理
consumer服務調用Producer服務接口時,提示一下異常
no suitable HttpMessageConverter found for request type
feign.codec.EncodeException: Could not write request: no suitable HttpMessageConverter found for request type [com.xxx.pojo.Xxx] and content type [application/x-www-form-urlencoded] at org.springframework.cloud.openfeign.support.SpringEncoder.encode(SpringEncoder.java:143) ~[spring-cloud-openfeign-core-2.1.0.RELEASE.jar:2.1.0.RELEASE] at feign.ReflectiveFeign$BuildEncodedTemplateFromArgs.resolve(ReflectiveFeign.java:372) ~[feign-core-10.1.0.jar:na] at feign.ReflectiveFeign$BuildTemplateByResolvingArgs.create(ReflectiveFeign.java:224) ~[feign-core-10.1.0.jar:na] at feign.SynchronousMethodHandler.invoke(SynchronousMethodHandler.java:74) ~[feign-core-10.1.0.jar:na] at feign.hystrix.HystrixInvocationHandler$1.run(HystrixInvocationHandler.java:106) ~[feign-hystrix-10.1.0.jar:na] at com.netflix.hystrix.HystrixCommand$2.call(HystrixCommand.java:302) ~[hystrix-core-1.5.18.jar:1.5.18] at com.netflix.hystrix.HystrixCommand$2.call(HystrixCommand.java:298) ~[hystrix-core-1.5.18.jar:1.5.18] at rx.internal.operators.OnSubscribeDefer.call(OnSubscribeDefer.java:46) ~[rxjava-1.2.0.jar:1.2.0] at rx.internal.operators.OnSubscribeDefer.call(OnSubscribeDefer.java:35) ~[rxjava-1.2.0.jar:1.2.0] at rx.internal.operators.OnSubscribeLift.call(OnSubscribeLift.java:48) ~[rxjava-1.2.0.jar:1.2.0] at rx.internal.operators.OnSubscribeLift.call(OnSubscribeLift.java:30) ~[rxjava-1.2.0.jar:1.2.0] at rx.internal.operators.OnSubscribeLift.call(OnSubscribeLift.java:48) ~[rxjava-1.2.0.jar:1.2.0] at rx.internal.operators.OnSubscribeLift.call(OnSubscribeLift.java:30) ~[rxjava-1.2.0.jar:1.2.0] at rx.internal.operators.OnSubscribeLift.call(OnSubscribeLift.java:48) ~[rxjava-1.2.0.jar:1.2.0] at rx.internal.operators.OnSubscribeLift.call(OnSubscribeLift.java:30) ~[rxjava-1.2.0.jar:1.2.0] at rx.Observable.unsafeSubscribe(Observable.java:10151) ~[rxjava-1.2.0.jar:1.2.0] at rx.internal.operators.OnSubscribeDefer.call(OnSubscribeDefer.java:51) ~[rxjava-1.2.0.jar:1.2.0] at rx.internal.operators.OnSubscribeDefer.call(OnSubscribeDefer.java:35) ~[rxjava-1.2.0.jar:1.2.0] at rx.Observable.unsafeSubscribe(Observable.java:10151) ~[rxjava-1.2.0.jar:1.2.0] at rx.internal.operators.OnSubscribeDoOnEach.call(OnSubscribeDoOnEach.java:41) ~[rxjava-1.2.0.jar:1.2.0] at rx.internal.operators.OnSubscribeDoOnEach.call(OnSubscribeDoOnEach.java:30) ~[rxjava-1.2.0.jar:1.2.0] at rx.internal.operators.OnSubscribeLift.call(OnSubscribeLift.java:48) ~[rxjava-1.2.0.jar:1.2.0] at rx.internal.operators.OnSubscribeLift.call(OnSubscribeLift.java:30) ~[rxjava-1.2.0.jar:1.2.0] at rx.Observable.unsafeSubscribe(Observable.java:10151) ~[rxjava-1.2.0.jar:1.2.0] at rx.internal.operators.OperatorSubscribeOn$1.call(OperatorSubscribeOn.java:94) ~[rxjava-1.2.0.jar:1.2.0] at com.netflix.hystrix.strategy.concurrency.HystrixContexSchedulerAction$1.call(HystrixContexSchedulerAction.java:56) ~[hystrix-core-1.5.18.jar:1.5.18] at com.netflix.hystrix.strategy.concurrency.HystrixContexSchedulerAction$1.call(HystrixContexSchedulerAction.java:47) ~[hystrix-core-1.5.18.jar:1.5.18] at com.netflix.hystrix.strategy.concurrency.HystrixContexSchedulerAction.call(HystrixContexSchedulerAction.java:69) ~[hystrix-core-1.5.18.jar:1.5.18] at rx.internal.schedulers.ScheduledAction.run(ScheduledAction.java:55) ~[rxjava-1.2.0.jar:1.2.0] at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511) ~[na:1.8.0_221] at java.util.concurrent.FutureTask.run(FutureTask.java:266) ~[na:1.8.0_221] at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149) ~[na:1.8.0_221] at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) ~[na:1.8.0_221] at java.lang.Thread.run(Thread.java:748) [na:1.8.0_221]
異常原因
如字面意思:
at org.springframework.cloud.openfeign.support.SpringEncoder.encode
缺少HttpMessageConverter 的編碼器
解決方法
缺少那就加進去
將SpringFormEncoder加入到容器中
import feign.codec.Encoder; import feign.form.spring.SpringFormEncoder; import org.springframework.context.annotation.Bean; import org.springframework.context.annotation.Configuration; import org.springframework.context.annotation.Primary; import org.springframework.context.annotation.Scope; /** * @author jianming * @create 2021-02-06-15:42 */ @Configuration public class FeignSupportConfig { @Bean @Primary @Scope("prototype") public Encoder multipartFormEncoder() { return new SpringFormEncoder(); } }
問題處理完成
Consumer的Feign使用
處理需要上述的編碼器,還需在接口中指定ContentType
@Service @FeignClient(value = "XXX-XXX") public interface LoginService { /** * 指定contentType */ @PostMapping(value = "/register", consumes = MediaType.APPLICATION_FORM_URLENCODED_VALUE) public MsgUtils create(User user); }
Producer正常編寫即可!以上為個人經驗,希望能給大傢一個參考,也希望大傢多多支持WalkonNet。
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