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kotlinlang

Hello if my presenter is written in java and my datasource is in kotlin and I have used coroutines, how do I connect them? Do I have to use the `suspendCancelableCoroutine{..}` ? Then do i need the `launch{}`  somewhere? Or from the java class I call the method of my presenter and that's it? I can avoid the launch?

Java cannot interact with suspending functions in a meaningful way. You have to expose any suspending functions that you want to use from Java in a way that Java can consume - i.e. as a `CompletableFuture` or something similar.
E.g.:
```suspend fun doSomething(): String = TODO()
fun doSomethingFutureAsync(): CompletableFuture&lt;String&gt; = future { doSomething() }```
This uses `future` from `kotlinx-coroutines-jdk8`: <https://github.com/Kotlin/kotlinx.coroutines/tree/master/integration/kotlinx-coroutines-jdk8>.

so no matter what I need to do a suspend fun?

I mean if my presenter is in Java and I have a datasource that has de suspendCancellableCOroutine this method has to be suspend right? otherwise it won't work

Well, you can also just do
```future {
    // suspending code here
}```
Which produces a `CompletableFuture` directly - and lets you suspend.