I still struggle with fully understanding scopes & contexts. Let’s say I have two scopes and wo...

# coroutines

[Marc Knaup]

I still struggle with fully understanding scopes & contexts.

Let’s say I have two scopes and would like to perform some suspendable work that is canceled if either of the two scopes is canceled.

Is this sufficient?

withContext(scope1.coroutineContext) {
    withContext(scope2.coroutineContext) {
        doSomeWork()
    }
}

Similarly with `Job`:

val context2 = scope1.coroutineContext + SupervisorJob()

withContext(scope1.coroutineContext) {
     withContext(context2) {
         doSomeWork()
     }
}

Would the cancellation of one context affect the other context?
Is that the proper way to do that?

[Dominaezzz]

https://github.com/Kotlin/kotlinx.coroutines/issues/1001

[Marc Knaup]

Thank you, that’s exactly the use case: https://github.com/Kotlin/kotlinx.coroutines/issues/1001#issuecomment-478337694

I’ve always assumed that it already works out of the box as it’s such a common use case (at least for me). But turns out the behavior is quite different from what I’ve expected 😕