Hey guys, I've a question regarding best practices...

# android

[Doru N.]

Hey guys, I've a question regarding best practices on where should the thread switching to background (ie. coroutines context switching Dispatchers.IO) take place in a clean architecture app? Should that take place inside the Repository (in the data layer), or in the UseCase-s (domain layer)? Would really hope to hear your opinions on that with some Advantages / disadvantages presented.

[mkrussel]

Both Google and JetBrains recommends all suspend functions to be main safe.

If you follow that, then you can call all suspend functions from the main thread.

In general I would switch to background thread at the point where you will be blocking the coroutine instead of suspending it.

[Paul Woitaschek]

@mkrussel do you have a link for that?

[Doru N.]

I was curious on the point where this thread switching (or withContext(Dispatcher.IO) in case of coroutines) should take place. I was thinking about doing that at the Repository level, but calling multiple functions from the Repo in the UseCase would inefficiently switch threads to IO and back for each call.

[mkrussel]

https://developer.android.com/kotlin/coroutines#use-coroutines-for-main-safety

[mkrussel]

https://developer.android.com/kotlin/coroutines/coroutines-best-practices#main-safe