I suppose I could get the parent job inside my non cancellab kotlinlang #coroutines

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Title

a

ansman

08/31/2020, 3:56 PM

I suppose I could get the parent job inside my non cancellable block and add a cancellation listener which throws a cancellation exception

b

bezrukov

08/31/2020, 5:28 PM

You should be able simply pass parentJob to withContext instead of noncancellable

a

ansman

08/31/2020, 5:29 PM

Ah, of course. A much more elegant solution 👌

I probably need an

ensureActive()

after my

withContext

since I don't think it'll throw if the job has been cancelled during the delay

b

bezrukov

08/31/2020, 5:32 PM

Nope, it should work as is

a

ansman

08/31/2020, 5:45 PM

Did they change this? I thought it was only when it resumes it checks for this?

No, I need an `ensureActive()`:

runBlocking {
    val parent = Job()
    val child = launch {
        withContext(parent) {
            delay(100L)
        }
        println("After")
    }
    delay(50L)
    child.cancel()
}

This code still prints after

Adding a

ensureActive()

before

println

it works as expected

b

bezrukov

08/31/2020, 5:50 PM

Ah, i thought you're about putting ensureActive directly after delay (withing withcontext block)

a

ansman

08/31/2020, 5:50 PM

Ah, yeah that'd do nothing haha

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