When using Kotlin Coroutines is it best practice to use GlobalScope.launch() or to inherit GlobalScope?

Question

I've seen two different uses of Coroutines at my company and I'm wondering which is best?

Usage 1

GlobalScope.launch(Dispatchers.IO) {
    loadMyData()
}

Usage 2

class MyClass(): GlobalScope {
. . .
    launch(Dispatchers.IO){
        loadMyData()
    }
. . . 
}

Is one better than the other? what are the pros and cons of each?

`GlobalScope` is not recommended to use. Please, see thread https://stackoverflow.com/questions/54335365/why-not-use-globalscope-launch/ — Sergio, Feb 06 '19 at 06:38
Possible duplicate of [Why not use GlobalScope.launch?](https://stackoverflow.com/questions/54335365/why-not-use-globalscope-launch) — Joffrey, Feb 06 '19 at 20:08

score 0 · Answer 1 · answered Feb 20 '19 at 09:50

There's a third option as well

class MyClass(): CoroutineScope by GlobalScope

But there's a simple question which you should ask when considering how to implement it: Do you want MyClass to be a CoroutineScope which could be used by other parts of code base as well?

Most of the time the answer should be no and therefore it might be better to use GlobalScope directly.

Also I'm assuming, GlobalScope is the scope to use here and not go into details of why to consider not using it.

When using Kotlin Coroutines is it best practice to use GlobalScope.launch() or to inherit GlobalScope?

1 Answers1