Hi, is it possible to cancel the scope without can...

# coroutines

[Tomas Kormanak]

Hi, is it possible to cancel the scope without canceling parent scope? I need to cancel all jobs in scope, the scope itself but not parent scope. I am trying to avoid keeping reference to each job by myself and cancel all of them.

coroutineScope {
    val job1 = launch { foo() }
    val job2 = launch { bar() }
    delay(1000)
    job1.cancel()
    job2.cancel()
}

[Tomas Kormanak]

I tried

coroutineScope {
    launch { foo() }
    launch { bar() }
    delay(1000)
    cancel()
}

but it closes parent scope as well.

[Richard Gomez]

It sounds like you want a SuperVisor scope.

[Tomas Kormanak]

I don't think so. As I understand it supervisorScope does not propagate exceptions and does not close itself when child job fails. But when I cancel supervisorScope, it cancels parent scope as well. I might be missing something.

[Richard Gomez]

Yeah, I was thinking that you'd wrap those jobs in a supervisor scope so they can be cancelled/fail without affecting it. However, I could be misremembering its utility.

Perhaps a more apt solution is the cancelChildren function:

Cancels all children jobs of this coroutine using Job.cancel for all of them with an optional cancellation cause. Unlike Job.cancel on this job as a whole, the state of this job itself is not affected.

https://kotlin.github.io/kotlinx.coroutines/kotlinx-coroutines-core/kotlinx.coroutines/cancel-children.html

[Tomas Kormanak]

this seems works:

launch{
  coroutineScope {
    launch { foo() }
    launch { bar() }
    delay(1000)
    cancel()
  }
}