Questions tagged [error-handling]
Questions related to handling errors and exceptions. According to Wikipedia, Exception handling is the process of responding to the occurrence, during computation, of exceptions – anomalous or exceptional events requiring special processing – often changing the normal flow of program execution. It is provided by specialized programming language constructs or computer hardware mechanisms.
308 questions
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API Design: Should I explicitly check for and throw on nullptr parameters if I have full control?
Say I have the following header
#ifndef WINDOW_HPP
#define WINDOW_HPP
// includes...
namespace window
{
struct Window
{
GLFWwindow *handle = nullptr;
};
struct ...
user393053
29
votes
14
answers
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Avoiding throw because we are not sure the exceptions will always be caught
I'm a junior in my company, and one of the coding rules they have is:
"a constructor object must never fail" (i.e., never throw). So what if I give them an invalid parameter? Then, the ...
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1
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Error codes in a legacy C++ project [closed]
Background
I have a large C++ project which uses system error codes from errno.h, in C style.
int Cls::foo(A arg, O* out) {
if (!validate(arg)) return -EINVAL;
if (!out) return -EINVAL;
return 0;...
- 1,445
2
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4
answers
494
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Watchdog/recovery mechanism for realtime embedded system (using heartbeat, exceptions and Posix signals)?
We have a large(ish) real-time embedded system. It's VxWorks, if that makes any difference. It has some C code in DKMs, but is 95%+ in C++.
It has absolutely no exception handling, nor Posix signal ...
- 4,308
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2
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107
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Deserializing serial protocol enums: Recoverable or unrecoverable errors?
I am currently implementing a library in Rust that implements a proprietary serial protocol.
The protocol specifies several enum values, that mostly are returned by the hardware as u8s (bytes), but ...
- 109
1
vote
2
answers
281
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Choosing a strategy for representing and handling errors (or more generally status codes) in java 8
I asked this questions on StackOverflow but it's definitely a bit too broad.
Even for this website, although the question is about software design, it might not be enough "focused".
I am ...
- 11
0
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1
answer
594
views
HTTP error 404 or 500 from an internal call to a separate API?
I have an endpoint in API 1 (my api) that queries API 2 (another companies api) to view and edit objects stored in API 2's database. API 1 is essentially acting as a wrapper service around API 2, ...
0
votes
1
answer
217
views
Bubbling errors upstream in async message-based services
Imagine a simple set up of an API and a 2nd service, where the API pushes some msgs to the message queue and the service pulls them and processes them.
Now, if an error occurs while processing a msg, ...
- 191
1
vote
3
answers
965
views
Should I use the "die" idiom in C++?
If we implement the following function:
template <typename... Ts>
[[noreturn]] inline bool die(std::string_view message_format = "", Ts&&... args);
We can then write:
if (...
- 2,808
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3
answers
235
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How to signal a dealbreaker error from a c-tor?
Context: 128kB RAM, freeRTOS.
Considered solutions:
Exceptions. Discouraged by both the memory size and the code style guide.
Late bool init(...);. Has worked for a decade but has it's problems - can ...
- 7,189
-3
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3
answers
100
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How to Validate Output Binary During/After Compilation on Platform without ECC Memory [closed]
On a platform with ECC memory, you can assure the compiled binary is 100% legit with EDAC daemon. (single-bit error will be corrected automatically, and multi-bit error will be logged so you can just ...
-2
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2
answers
325
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Why does most software break or refuse to continue immediately if the folder where their data is stored is not available? [closed]
Most software creates a directory (usually in ~/Library or ~/Library/Application Support in MacOS) to store user preferences, browser history, etc. Most software attempts to create their data ...
user403833
0
votes
2
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173
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How can I avoid re-running code when exceptions are thrown and user re-submits?
I have a checkout process that 1) creates a user account in Stripe and my database, 2) creates a paymentMethod in Stripe and logs the last4 in the database, 3) creates the subscription in Stripe and ...
0
votes
2
answers
2k
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Is "error first" better than "if-else", why? [duplicate]
I have an eternal discussion in my work about why "error first" is "worng".
In order to ensure what I try to tell with error first is the following code pattern:
if condition:
...
- 387
0
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1
answer
103
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What is the current practice in handling connection errors when the service "offers" multiple IP addresses?
With the current implementation of getaddrinfo(), I'm not given any information about a timeout of the IP address(es) returned. The library implementing that function has the information, but I haven'...
- 241
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2
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API: should a problem with data be announced by a HTTP code or in the response body?
After years of (amateur, dirty) personal API development I finally decided to follow some best practices.
My problem: the API may have problems, say, retrieving some data. It will gracefully handle ...
- 1,661
2
votes
3
answers
2k
views
Error handling. Is it always necessary?
So, today I was reading a piece of code I found this function:
Public Function FolderExists(sPath As String) As Boolean
Dim FSO As New FileSystemObject
On Error GoTo errHandler
sPath = ...
- 209
3
votes
2
answers
9k
views
Error handling for repository: exceptions or wrapping return value?
The question is about a desktop application I'm creating in C# and WPF.
As very common I'm using the repository pattern in my Data Access Layer for my CRUD operations. All data comes from the ...
- 331
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0
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661
views
Best way to trigger javascript error to go to catch block
I have a couple of doubts regarding the quality of my code. I'm working on a helper function (for KoaJS) where I'm validating a Firebase ID token. If it is valid, I return the decoded token; otherwise ...
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vote
4
answers
1k
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Is having 3 return types for a function, in order to facilitate error handling a bad idea?
I have a function which returns either true/false, each return plays nicely with the function name: isOnline, however, there are cases in which I want to throw an error inside of it. Maybe the status ...
5
votes
1
answer
189
views
Clean way to handle different exceptions in Javascript?
I'm Java developer and I'm now learning Javascript creating a personal project.
I don't know how to handle different errors in Javascript in a clean way and I can't find a good solution on the web.
I'...
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11
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Is there a general solution to the problem of "sudden unexpected bursts of errors" in software?
Let me explain what I mean.
I have made a complex, highly polished over years PHP framework/library for my own use. I very aggressively log the smallest notice and immediately deal with it as soon as ...
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1
answer
287
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Is it good practice to use try/catch like Python in Java?
I mainly use Python and just started learning Java. For now, I've tried using try/catch for basic file read/write as follows
public String[] readFile(String fileName){
try{
// read file
} ...
1
vote
3
answers
286
views
Which of these model error handling strategies makes most sense?
I am building an API in expressjs and, currently, mongo/mongoose. I currently have some model methods that return true or false, some that return a value or false, and some that return a value or ...
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votes
1
answer
8k
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How to handle errors from back-end in front-end and different languages?
I have a rest api and a reactjs front end, in some cases, the api will send an error to the front end and I need to display that error. My app will support multiple languages, so the error must be ...
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