How do I await a completableFuture inside an effect {} block?

The same as you would regularly do with KotlinX Coroutines, https://kotlinlang.org/api/kotlinx.coroutines/kotlinx-coroutines-jdk8/

I think I might be misunderstanding something then, using kotlinx-coroutines-jdk8 with the .await() extension gives me a type F!. How do I actually work with this? I was trying to achieve something similar as the awaitFirst() in the coroutines reactive streams API

F!

? 🤔 This should give you simply

A

, https://kotlinlang.org/api/kotlinx.coroutines/kotlinx-coroutines-jdk8/kotlinx.coroutines.future/await.html. It might return a platform type

!

which means that Kotlin didn't find

@NonNull

or

@Nullable

and it's up to you to check the Java API and deal with potential

null

coming from Java.

hmmm, maybe it's intellij then

Are you using a Java https://docs.oracle.com/javase/8/docs/api/java/util/concurrent/CompletableFuture.html instead of a Kotlin Coroutines https://kotlinlang.org/api/kotlinx.coroutines/kotlinx-coroutines-core/kotlinx.coroutines/-completable-deferred/ ?

Yeah, there's a function in the coroutines-jdk8 module that has transformers. I had just messed up some generic types so everything was a bit wonky. Got it working now 🙂