Tagged Questions
29
votes
6answers
10k views
How essential is it to make a service layer?
I started building an app in 3 layers (DAL, BL, UI) [it mainly handles CRM, some sales reports and inventory].
A colleague told me that I must move to service layer pattern, that developers came to ...
16
votes
2answers
5k views
Alternative patterns for web development? (non-MVC)
Recently I've been reading some blog posts regarding MVC and how it doesn't fit the web. I've learned about alternative patterns like the RMR Architecture.
I'm curious what other patterns people are ...
56
votes
16answers
19k views
Is it better to return NULL or empty values from functions/methods where the return value is not present?
I am looking for a recommendation here. I am struggling with whether it is better to return NULL or an empty value from a method when the return value is not present or cannot be determined.
Take ...
7
votes
1answer
330 views
Does current evidence support the adoption of Contextual over Canonical Data Models?
The "canonical" idea is pervasive in software; patterns like Canonical Model, Canonical Schema, Canonical Data Model and so on, seem to come up again and again in development.
Like many developers, ...
5
votes
6answers
363 views
Re-architecting a classic inheritance design
I have the opportunity to rewrite a core piece of a project (C#) that is inheritance-heavy and feels increasingly restrictive in how it is designed. The scenario is pretty simple, imagine an ...
3
votes
2answers
230 views
Tester/Doer pattern: Assume the caller conforms to the pattern or be defensive and repeat the check?
Assume a simple class that implements the Tester/Doer pattern:
public class FooCommandHandler : ICommandHandler
{
public bool CanHandle(object command)
{
return command is FooCommand;
...
0
votes
1answer
120 views
Architecture for writing add-ins for closed-source software
currently I'm designing an add-in for the modelling tool Enterprise Architect. The general architecture is shown in the picture below.
Basically every action where the add-in can react to is ...
