Exception Handling in Rest web service!

Step-1

Define some custom exception :-

public class LanguageNotFoundException extends RuntimeException {

public LanguageNotFoundException(String message){
super(message);
}

public LanguageNotFoundException(String message,Exception exe){
super(message,exe);
}
}


public class UserTokenNotValidException extends RuntimeException {

private String userToken;

public String getUserToken() {
return userToken;
}

public void setUserToken(String userToken) {
this.userToken = userToken;
}
}


Step-2

@ControllerAdvice ->>>Spring 3.2

@ControllerAdvice
public class GPSGlobalExceptionHandler {

@Autowired
@Qualifier("UserService")
private UserService userService;

/**
     * Initiate Logger for this class
     */

    private static final Log logger = LogFactory.getLog(GPSGlobalExceptionHandler.class);

@ResponseStatus(HttpStatus.BAD_REQUEST)
@ExceptionHandler(LanguageNotFoundException.class)
@ResponseBody QuizErrorInfo handleLanguageException(HttpServletRequest req, Exception ex) {
QuizErrorInfo errorInfo=new QuizErrorInfo(HttpStatus.BAD_REQUEST.toString(),"4000" , ex.getMessage(), ex.getClass().toString(), req.getRequestURL().toString());
errorDBLogger(ex, req.getRequestURL().toString());
ex.printStackTrace();
if(logger.isErrorEnabled()){
logger.error(errorInfo);
logger.error(ex.getStackTrace());
}
return errorInfo;
}

@ExceptionHandler(MethodArgumentNotValidException.class)
 @ResponseStatus(HttpStatus.BAD_REQUEST)
 @ResponseBody
 public QuizErrorInfo processValidationError(HttpServletRequest req,MethodArgumentNotValidException ex) {
errorDBLogger(ex, req.getRequestURL().toString());
   BindingResult result = ex.getBindingResult();
   List<FieldError> fieldErrors = result.getFieldErrors();
   String errors= processFieldErrors(fieldErrors);
   QuizErrorInfo errorInfo=new QuizErrorInfo(HttpStatus.BAD_REQUEST.toString(),"3000" , errors, ex.getClass().toString(), req.getRequestURL().toString());
   return errorInfo;
 }

}


Step-3
public class QuizErrorInfo {
private String status;
private String code;
private String message;
private String ex;
private String moreInfo;


public QuizErrorInfo(String status, String code, String message, String ex,
String moreInfo) {
this.status = status;
this.code = code;
this.message = message;
this.ex = ex;
this.moreInfo = moreInfo;
}

}