conversation kotlinlang #coroutines

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Title

s

sitepodmatt

02/14/2019, 4:23 AM

g

gildor

02/14/2019, 4:35 AM

This code will hang forever because coroutineScope never return because produce coroutine will never finish

s

sitepodmatt

02/14/2019, 5:00 AM

ah yeah will need to wrap the while in async { } I guess

g

gildor

02/14/2019, 5:20 AM

no, this code semantically incorrect, you have to pass coroutine scope to launch produce as any other coroutine

Function coroutineScope just will not work with such use case because coroutineScope suspend until all child coroutines are finished

s

sitepodmatt

02/14/2019, 6:01 AM

hmmm Id need to use withContext(dispatcher.someother) { } inside produce ?

g

gildor

02/14/2019, 6:16 AM

Why? no

This is now what I want to say. I meant that

coroutineScope{}

is special kind of scope builder that created to use as suspend function, but it just cannot be used with produce inside, because design to suspend until all child coroutines will finish

suspend fun CoroutineScope.createChangeStream() : ReceiveChannel<String> {
        return produce<String> {
                while(true) {
                    send("Changed")
                    delay(1000)
                }
        }
    }

👍 1

just use this approach

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