Hi all 👋 I have a (potentially) dumb question regarding

CoroutineScope

s I have a class that allocates some resources on its constructor

init { // }

and the client has to explicitly call

.dispose()

when it's done with it (I'm on Android so this is done in

onDestroy()

)

lateinit var foo : Foo
onCreate() {
  foo = Foo() // resources get allocated (init openGL context, open a file, etc)
}

onDestroy() {
  foo.dispose() // must not forget!
}

I was thinking that it would be really nice to have these resources cleaned up automatically (something like RAII in c++) That got me thinking, if there was a way to get a callback when the parent coroutine scope is being cancelled... I could do the cleanup then

if you're on Android, why not LifecycleObserver?

fair point, I could use LifecycleObserver (and probably should)

as a total hack,

launch {
    suspendCancellableCoroutine { continuation ->
        continuation.invokeOnCancellation { dispose() }
    }
}

but that seems like a terrible idea since it'll keep the scope alive forever until explicitly cancelled

yeah, agree, I think I'm going to stick with LifecycleObserver