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#compose
Title
c
Cicero
10/31/2021, 4:13 PMHey, I saw a lot of "Reasons not to use GlobalScope" but what are the alternatives when you can't reach a scope? Do I always need to pass down an activity reference?
I have a singleton watching network state and pushing this state as it changes into a singleton flow.
The way I need to handle some of this processing will always require a thread but it's not guaranteed I will have short access to a scope.
What is your solution? What is our community default solution?
b
Big Chungus
10/31/2021, 4:16 PMYou can create your own coroutine scope with CoroutineScope() factory function and close it when no longer needed
c
Cicero
10/31/2021, 4:18 PM Copy code
fun CoroutineScope.launch(
context: CoroutineContext = EmptyCoroutineContext,
// ...
): JobOk, but then how do I close? Does the run blocking already resolves the issue automagically?
b
Big Chungus
10/31/2021, 4:21 PMScope normally closes itself when all jobs complete, but you can also close it manually
c
Cicero
10/31/2021, 4:22 PMOk, thanks man, I will hit that hint you gave me
Hopefully this will save from all my references to GlobalScope
❤️
b
Big Chungus
10/31/2021, 4:49 PMGood luck!
c
Cicero
10/31/2021, 5:18 PMDidn't really solve my problem, I'm still trying to get around the issue
I need to emit a flow from a place I wouldn't have conventional access to a context.
Should I just create a global reference to my activities context?
b
Big Chungus
10/31/2021, 5:31 PMWell global custom CoroutineScope is still better than GlobalScope, because you can close it whenever you want without having to worry about it being used by some of the libs
☝🏻 1
c
Cicero
10/31/2021, 5:34 PMBut how do I create a scope when there is no scope?
The only reason I'm using Global is to avoid hoisting trough 5 layers just to ask for a scope
Copy code
fun dismissFeedback() {
runBlockingTest{
NetworkFeedback.feedback.emit(Finish)
}
}
fun runBlockingTest(test: suspend CoroutineScope.() -> Unit) =
CoroutineScope(EmptyCoroutineContext).produce<Unit>(block = test)
fun networkRequestTrigger() {
runBlockingTest{
NetworkFeedback.feedback.emit(Request)
}
}❤️
A question o elbow grease
But now I'm curious if this is the best approach 🙂
b
Big Chungus
10/31/2021, 6:30 PMNot sure if it's the best, but definitely better than GlobalScope
💪🏽 1
Might be good to reuse your custom scope between tests, tho
c
Cicero
10/31/2021, 6:34 PMAwesome, this is satisfactory