【发布时间】:2014-11-19 14:54:41
【问题描述】:
我有一个 Spring Web 应用程序。每当在应用程序中出现错误时,我都会将错误放在错误上下文中(代码如下)。然后,我在异常处理程序中检索错误并返回一条消息。现在,假设输入 A,如果错误消息是“人不存在” 现在,对于第一次调用 spring web 应用程序,我得到了正确的输出:“Person is not there” 但是,对于第二个电话:我得到输出:“人不存在”,“人不存在” 因此,即使我使用的是 ThreadLocal,它也会记住我的最后一个请求。有人可以帮忙吗
我的 ErrorContext 代码:
公共类 ErrorContext {
private static ThreadLocal<ErrorContext> thisObj = new ThreadLocal<ErrorContext>();
/**
* List of errors.
*/
private ArrayList<ApplicationError> errorList;
/**
* Default private constructor.
*/
private ErrorContext() {
errorList = new ArrayList<ApplicationError>();
}
/**
* Initialize the ThreadLocal variable.
*/
public static void initialize() {
if (thisObj.get() == null)
thisObj.set(new ErrorContext());
else {
ErrorContext errorContext = (ErrorContext) thisObj.get();
if (errorContext.getErrors() != null)
errorContext.getErrors().clear();
}
}
/**
* Returns a new instance of the class.
*
* @return {@link ErrorContext}.
*/
public static ErrorContext getInstance() {
if (thisObj.get() == null) {
thisObj.set(new ErrorContext());
}
return (ErrorContext) thisObj.get();
}
/**
* Add the error code to the List.
*
* @param errorCode
* errorCode obtained.
*/
public void addError(final ApplicationError error) {
errorList.add(error);
}
/**
* Return the List of errorCodes.
*
* @return List of error codes.
*/
public List<ApplicationError> getErrors() {
return errorList;
}
/**
* @author anbapri resets the context.
*/
public static void resetContext() {
thisObj.set(new ErrorContext());
ErrorContext errorContext = (ErrorContext) thisObj.get();
if (errorContext.getErrors() != null)
errorContext.getErrors().clear();
}
/**
* Returns true if ErrorContext has error, otherwise false.
*
* @return
*/
public boolean hasError() {
return !errorList.isEmpty();
}
}
我的响应处理程序
{
包 com.db.wscis.core.web.handler;
导入 java.util.ArrayList; 导入 java.util.List; 导入 java.util.Locale;
导入 javax.servlet.http.HttpServletRequest;
导入 org.apache.commons.logging.Log; 导入 org.apache.commons.logging.LogFactory; 导入 org.springframework.beans.factory.annotation.Autowired; 导入 org.springframework.context.MessageSource; 导入 org.springframework.context.i18n.LocaleContextHolder; 导入 org.springframework.http.HttpStatus; 导入 org.springframework.web.bind.annotation.ControllerAdvice; 导入 org.springframework.web.bind.annotation.ExceptionHandler; 导入 org.springframework.web.bind.annotation.ResponseBody; 导入 org.springframework.web.bind.annotation.ResponseStatus;
导入 com.db.wscis.core.util.exception.ApplicationError; 导入 com.db.wscis.core.util.exception.ApplicationException; 导入 com.db.wscis.core.util.exception.ErrorContext; 导入 com.db.wscis.core.web.model.ApplicationErrorRes; 导入 com.db.wscis.core.web.model.BaseResponse; 导入 com.db.wscis.core.web.model.ResponseObject;
@ControllerAdvice 公共类 RestExceptionProcessor {
private static final Log logger = LogFactory
.getLog(RestExceptionProcessor.class);
@Autowired
private MessageSource messageSource;
@ExceptionHandler(Exception.class)
@ResponseStatus(value = HttpStatus.NOT_FOUND)
@ResponseBody
public ResponseObject handleException(HttpServletRequest req, Exception excpt) {
logger.error("",excpt);
// Locale locale = LocaleContextHolder.getLocale();
ResponseObject res = new ResponseObject();
// String errorMessageDesc;
res.setResultMessage("failure");
//Business validation exception
if (excpt instanceof ApplicationException) {
List<ApplicationError> errorMessages = ErrorContext.getInstance()
.getErrors();
List<ApplicationErrorRes> errorMessageRes=new ArrayList<ApplicationErrorRes>();
for(int i=0;i<errorMessages.size();i++){
ApplicationErrorRes appErrorRes= mapApplicationErrorToApplicationErrorRes(errorMessages.get(i));
errorMessageRes.add(appErrorRes);
}
res.setApplicationErrors(errorMessageRes);
}
//Other generic exception
else {
ArrayList<Exception> exceptionList=new ArrayList<Exception>();
exceptionList.add(excpt);
res.setExceptionList(exceptionList);
}
return res;
}
private ApplicationErrorRes mapApplicationErrorToApplicationErrorRes(ApplicationError appError){
ApplicationErrorRes res=new ApplicationErrorRes();
res.setErrorCode(appError.getErrorCode());
res.setErrorLevel(appError.getErrorLevel());
res.setErrorMessage(appError.getErrorMessage());
return res;
}
} }
【问题讨论】:
-
为什么不在ApplicationException中存储ApplicationError?
标签: spring thread-local