溫馨提示×
您好，登錄后才能下訂單哦！
點擊 登錄注冊 即表示同意《億速云用戶服務條款》
您好，登錄后才能下訂單哦！
本篇內容介紹了“Feign調用全局異常處理的解決方法”的有關知識，在實際案例的操作過程中，不少人都會遇到這樣的困境，接下來就讓小編帶領大家學習一下如何處理這些情況吧！希望大家仔細閱讀，能夠學有所成！
TestService#addRecord(ParamVO) failed and no fallback available.；
對于failed and no fallback available.這種異常信息，是因為項目開啟了熔斷：
feign.hystrix.enabled: true
當調用服務時拋出了異常，卻沒有定義fallback方法，就會拋出上述異常。由此引出了第一個解決方式。
自定義Feign解析器：
import com.alibaba.fastjson.JSONException;
import com.alibaba.fastjson.JSONObject;
import com.crecgec.baseboot.jsoncore.exception.BaseException;
import feign.Response;
import feign.Util;
import feign.codec.ErrorDecoder;
import org.springframework.context.annotation.Configuration;
import java.io.IOException;
@Configuration
public class FeignErrorDecoder implements ErrorDecoder {
@Override
public Exception decode(String methodKey, Response response) {
try {
// 這里直接拿到我們拋出的異常信息
String message = Util.toString(response.body().asReader());
try {
JSONObject jsonObject = JSONObject.parseObject(message);
return new BaseException(jsonObject.getString("resultMsg"), jsonObject.getInteger("resultCode"));
} catch (JSONException e) {
e.printStackTrace();
}
} catch (IOException ignored) {
}
return decode(methodKey, response);
}
}public class BaseException extends RuntimeException {
private int status ;
public int getStatus() {
return status;
}
public void setStatus(int status) {
this.status = status;
}
public BaseException() {
}
public BaseException(String message, int status) {
super(message);
this.status = status;
}
public BaseException(String message) {
super(message);
}
public BaseException(String message, Throwable cause) {
super(message, cause);
}
public BaseException(Throwable cause) {
super(cause);
}
public BaseException(String message, Throwable cause, boolean enableSuppression, boolean writableStackTrace) {
super(message, cause, enableSuppression, writableStackTrace);
}
}public class ResultSet {
/**
* 返回的狀態碼
*/
private Integer resultCode;
/**
* 返回的消息
*/
private String resultMsg;
/**
* 返回的數據
*/
private Object data;
public ResultSet() {
}
public ResultSet(Integer resultCode, String resultMsg) {
this.resultCode = resultCode;
this.resultMsg = resultMsg;
}
public ResultSet(Integer resultCode, String resultMsg, Object data) {
this.resultCode = resultCode;
this.resultMsg = resultMsg;
this.data = data;
}
public Integer getResultCode() {
return resultCode;
}
public void setResultCode(Integer resultCode) {
this.resultCode = resultCode;
}
public String getResultMsg() {
return resultMsg;
}
public void setResultMsg(String resultMsg) {
this.resultMsg = resultMsg;
}
public Object getData() {
return data;
}
public void setData(Object data) {
this.data = data;
}
}@ExceptionHandler(value = BaseException.class)
public ResultSet defaultErrorHandler(HttpServletRequest req, HttpServletResponse resp, BaseException e) {
ResultSet resultSet = new ResultSet();
if (e.getStatus() == 400) {
resultSet.setResultCode(-1);
resultSet.setResultMsg(e.getMessage());
resultSet.setData(null);
resp.setStatus(400);
} else {
resp.setStatus(500);
if(logger.isErrorEnabled()){
logger.error("系統異常，請聯系系統開發人員進行處理", e);
}
resultSet.setResultCode(-1);
resultSet.setResultMsg(e.getMessage());
resultSet.setData(null);
}
return resultSet;
}這樣就能完成了feign接收異常處理的自定義異常信息！
第三方系統調用我方系統@FeignClient接口時報錯
com.netflix.hystrix.exception.HystrixRuntimeException: WorkFlowTaskOperateService#processWorkFlowTaskSyncCallback(TaskProcessDTO) failed and no fallback available.
我方系統出現FeignException.
第三方調用者拋出的異常:HystrixRuntimeException
一檢查我們系統確實沒有指定fallback和configuration,并且調用方開啟了feign.hystrix.enabled: true
@FeignClient(value = "taxplan-workflow")
修改方法：
第三方調用在Application.java添加處理Feign異常的全局處理方法
@Bean
public Feign.Builder feignBuilder() {
return Feign.builder().requestInterceptor(new RequestInterceptor() {
@Override
public void apply(RequestTemplate requestTemplate) {
Map<String, String> customHeaders = WebUtils.getCustomHeaders();
customHeaders.forEach((k, v) -> {
requestTemplate.header(k, v);
});
}
}).errorDecoder(new CustomErrorDecoder());
}這里使用了RequestInterceptor攔截器,可以定制請求頭,如果不想定制,可以改為
return Feign.builder().errorDecoder(new CustomErrorDecoder());
實現ErrorDecoder接口,其中ExceptionCode是枚舉類.
public Exception decode(String methodKey, Response response) {
if (response.status() >= 400 && response.status() <= 499) {
return new BaseBizException(ExceptionCode.CALL_INNER_ERROR, "Client error.httpStatusCode:" + response.status());
} else {
if (response.status() >= 500 && response.status() <= 599 && response.body() != null) {
try {
String content = CharStreams.toString(new InputStreamReader(response.body().asInputStream(), StandardCharsets.UTF_8));
Map responseBody = (Map) JSONObject.parseObject(content, Map.class);
if (responseBody.containsKey("code")) {
return new BaseBizException(responseBody.get("code").toString(), Objects.toString(responseBody.get("msg")));
}
} catch (Exception var5) {
}
}
return new BaseBizException(ExceptionCode.CALL_INNER_ERROR);
}
}ExceptionCode枚舉類如下:可以自定義增加刪除
public enum ExceptionCode {
ILLEGAL_STATE(4001, "非法訪問"),
PARAM_REQUIRED(4002, "參數不能為空"),
PARAM_FORMAT_ILLEGAL(4003, "參數格式錯誤"),
REQUEST_DATA_DUPLICATION(4004, "重復請求"),
REQUEST_DATA_ERROR(4005, "請求數據錯誤"),
REQUEST_DATA_NOT_MATCH(4006, "請求數據不一致"),
RECORD_NOT_EXIST(5001, "記錄不存在"),
RECORD_EXISTED(5002, "記錄已存在"),
RECORD_ILLEGAL_STATE(5003, "數據異常"),
BALANCE_NOT_ENOUGH(5103, "余額不足"),
CALL_INNER_ERROR(5800, "調用內部服務接口異常"),
THIRD_PART_ERROR(5801, "調用第三方接口異常"),
SYSTEM_ERROR(9999, "系統異常");
public final int code;
public final String defaultMessage;
private ExceptionCode(int code, String defaultMessage) {
this.code = code;
this.defaultMessage = defaultMessage;
}
}“Feign調用全局異常處理的解決方法”的內容就介紹到這里了，感謝大家的閱讀。如果想了解更多行業相關的知識可以關注億速云網站，小編將為大家輸出更多高質量的實用文章！
免責聲明：本站發布的內容（圖片、視頻和文字）以原創、轉載和分享為主，文章觀點不代表本網站立場，如果涉及侵權請聯系站長郵箱：is@yisu.com進行舉報，并提供相關證據，一經查實，將立刻刪除涉嫌侵權內容。
