hi all! I am making some home-made application where I use a data flow like:
Repository <-> UseCase <-> ViewModel <-> View
So basically UseCase with MVVM
I can find some basic introductions about the usecase pattern, but does anyone have some in-depth article/repo example?
I am looking for information about things like this:
• Things like observing data (should I first fetch data and after that observe on it, within the useCase)
• when to fire a use case and for specific things (like would you fire a usecase to validate input while typing, or only while submitting?)
• Should I observe fields from a usecase, or only the output from the execution?
• What are the rules where to put specific logic, in the view model or usecase (or both)?
j
Javier
10/21/2020, 1:33 PM
UseCases generally should be used in ViewModels (or presenters), and views observe
UseCases maybe is not returning a
Flow
(or whatever API you are using), for example, if your app only gets data from network, you don't need to pass a
Flow
from datasources -> repositories -> use cases, you only need a
