support additional async return types

[Ladicek]

We should support additional asynchronous return types, in addition to just CompletionStage. That is:

• Mutiny: Uni
• RxJava: Single, Maybe, Completable
• Reactor: Mono

We can probably ignore stream types (Multi, Observable/Flowable, Flux) for now.

[Ladicek]

See also #218 (comment)

[schulzp]

Hi @Ladicek!

I'd highly appreciate support for Uni and the like. It would save us the @Asynchronous overhead as we're already using Vert.X' asynchronous web client. Is this part of any roadmap, already?

[Ladicek]

Hi @schulzp, I think what you're after is #218. This issue is just about allowing different return types for @Asynchronous methods. (Actually perhaps you want a combination of both :-) )

If you care about not having to use @Asynchronous, or more generally about its semantics of "always run this on an extra thread", you can comment on #218 and also on eclipse/microprofile-fault-tolerance#533 -- hearing from community folks would be very good.

As for roadmap, unfortunately there's none at the moment, as I have very little time to spare on SmallRye Fault Tolerance :-(

[Ladicek]

Done in #310.