custom-exceptions

问题 I have a Custom class, InvalidCodeException in Project A public class InvalidCodeException : Exception { public InvalidCodeException () { } public InvalidCodeException (string message) : base(message) { } public InvalidCodeException (string message, Exception innerException) : base(message, innerException) { } } a WCF service in Project B. And a client in Project C. Project A is referenced in Project B and C. I am throwing InvalidCodeException from Project B and catching in Project C. Problem

问题 I am trying to handle custom exception handling using Spring MVC. DAO layer exception handler by service layer and service layer wrap that exception and handle that exception by Controller exception handler by Spring MVC. Following is my code: @Override public void saveNewMachineDetails(Machine machine, Configurations configurations) throws DataNotPersist{ logger.info("call service saveNewMachineDetails method"); try{ machineRepository.saveAndFlush(machine); }catch(Exception ex){ // logger

问题 As a followup to my previous question, I was trying to create co-operative user defined exceptions that don't violate LSP. I tried to search the PEPs and use PyCharm but I was unable to get a clear answer. I only found this PEP, but it talks about BaseException , the docs state if you want to create a user defined exception, use Exception . What are the required arguments that should be passed to the Exception constructor without violating LSP ? class StudentValueError(Exception): """Base

问题 I have a custom exception class: public class MyException: Exception { public MyException(MyExceptionEnum myError) : base(myError.ToDescription()) { } public MyException(MyExceptionEnum myError, Exception innerException) : base(myError.ToDescription(), innerException) { } } .ToDescription is a extension method on MyExceptionEnum to provide enum-to-string mapping for the exception error details. Here's how i throw it: if (someCondition) throw new MyException(MyExceptionEnum.SomeError); So i

问题 Before I get to the code, let me explain my aim. My web app displays vehicles for sale. I have a need for a custom 404 page that will display 12 of the latest vehicles added to the database if the user tries to access a page that doesn't exist. I have the following... App\Exceptions\CustomException.php <?php namespace App\Exceptions; use Exception; class CustomException extends Exception { public function __construct() { parent::__construct(); } } App\Exceptions\CustomHandler.php <?php

问题 class AppError(Exception): pass class MissingInputError(AppError): pass class ValidationError(AppError): pass ... def validate(self): """ Validate Input and save it """ params = self.__params if 'key' in params: self.__validateKey(escape(params['key'][0])) else: raise MissingInputError if 'svc' in params: self.__validateService(escape(params['svc'][0])) else: raise MissingInputError if 'dt' in params: self.__validateDate(escape(params['dt'][0])) else: raise MissingInputError def _

问题 class AppError(Exception): pass class MissingInputError(AppError): pass class ValidationError(AppError): pass ... def validate(self): """ Validate Input and save it """ params = self.__params if 'key' in params: self.__validateKey(escape(params['key'][0])) else: raise MissingInputError if 'svc' in params: self.__validateService(escape(params['svc'][0])) else: raise MissingInputError if 'dt' in params: self.__validateDate(escape(params['dt'][0])) else: raise MissingInputError def _

问题 I have a couple of custom exceptions in my business layer that bubble up to my API methods in my ASP.NET application. Currently, they all translate to Http status 500. How do I map these custom exceptions so that I could return different Http status codes? 回答1: This is possible using Response.StatusCode setter and getter. Local Exception handling: For local action exception handling, put the following inside the calling code. var responseCode = Response.StatusCode; try { // Exception was

问题 I am using OdbcConnection class to connect to an external database. As a part of this process, I am also trying to handle the various exceptions thrown by this class (OdbcException). I find that the OdbcException contains a list called Errors which has multiple OdbcErrors. If I provide wrong credentials, I am able to get the access denied error but they are repeated twice in the errors list. The Errors list contains two errors but they are not unique. At the user end I see : ERROR [HY000]

问题 The Python docs state: Programs may name their own exceptions by creating a new exception class (see Classes for more about Python classes). Exceptions should typically be derivedfrom the Exception class, either directly or indirectly. ... When creating a module that can raise several distinct errors, a common practice is to create a base class for exceptions defined by that module, and subclass that to create specific exception classes for different error conditions. From Python’s super()