exception-handling

问题 When I try to raise transient exception manually, it is always handled as AggregateException . Since it is handled as AggregateException , it is not handled as transient error in my retry policy and not retried for the predefined retry count. Transient errors are shown here . Therefore I have tried CommunicationException and ServerErrorException but it is handled as an AggregateException. When I look for AggregateException, it says "Represents one or more errors that occur during application

问题 I frequently encounter a problem where I need to apply a function to a large iterator of data, but that function sometimes raises a known error that I want to ignore. Unfortunately, neither list compressions nor the map function has a good way to handle errors. What is the best way to skip/deal with errors quickly in python? For example, say I have a list of data and a function, the function raises a ValueError whenever the data is a str. I want it to skip these values. One way to do this

问题 I've been studying a lot of the common ways that developers design/architect an application on domain driven design (Still trying to understand the concept as a whole). Some of the examples that I saw included the use of events via an event aggregator. I liked the concept because it truly keeps the different elements/domains of an application decoupled. A concern that I have is: how do you rollback an operation in the case of an error? For example: Say I have an order application that has to

问题 The problem that I am facing is primarily on Exception Handling! When an exception occurs I want to put that data in another log table with the error message. However, in DB2 I am not able to figure out a way to retrieve the corresponding error message for the raised SQLSTATE. PS: I have a stored procedure for this migration and I am not using any other language to call it. We could do this through SQLERRM in oracle; probably it should be a small thing, still for some strange reasons I have

问题 I am trying to implement an Custom ExceptionTranslationFilter in order to handle all of my exception in regards of the authentication ( in which the validity of the toke to be used during authentication happens on my custom filter class). As per searching on the internet there are no available sources for the proper java configuration. Please see my current configuration. protected void configure(HttpSecurity http) throws Exception { http.anonymous().and() .servletApi().and() .headers().and()

问题 Handling files (opening) is an activity particularly prone to error. If you were to write a function to do this (although trivial), what is the best way to write it in wrt handling errors? Is the following good? if (File.Exists(path)) { using (Streamwriter ....) { // write code } } else // throw error if exceptional else report to user Would the above (although not syntactially correct) a good way to do this? 回答1: First you can verify if you have access to the file, after, if the file exists

问题 I'm working on the back-end of my website and I'm wondering how far I should be going to test for errors and throwing exceptions accordingly? Testing in the sense of improper usage of methods and functions. Not errors under correct usage. My biggest concern is code bloat and uglying it up with a bunch of if/elses, type checks, and other such tests. Should you go so far as to consider every possible way someone could use an object, catch all the improper uses, and throw exceptions to make it

问题 I'm working on the back-end of my website and I'm wondering how far I should be going to test for errors and throwing exceptions accordingly? Testing in the sense of improper usage of methods and functions. Not errors under correct usage. My biggest concern is code bloat and uglying it up with a bunch of if/elses, type checks, and other such tests. Should you go so far as to consider every possible way someone could use an object, catch all the improper uses, and throw exceptions to make it

问题 I'd like to have something like a "catch-all" for exceptions thrown from a inside a Control or a Form that reside within the current thread , but without resorting to using the Application.ThreadException of the entire thread. Why? Because I'd like to keep the exception handling modular. All the code that can cause the problems is being run within a Form ( DummyForm ) that is running within the current thread. I'd like to be able to wrap all of them in some other exception (

问题 Recently i migrate the project from vb6 to vb.net with framework 2.0 in visual studio 2008 in xp system it is working fine in that. After that i changed the framework to 3.5 and opened the project in vs2010 in xp only there also it is working fine for me. Now i changed my Operating system to windows 7. here i opened the project i got some issues i solved and then build it it is succeed. but when i am trying to run i got error like below An error occurred creating the form. See Exception