[grpc-kotlin] Server-side deadlines / timeouts

[Thomas Cesare-Herriau]

Hi all!

tl;dr: I'm looking for the right Kotlin idiomatic way to setup server-side deadlines.

The grpc-kotlin wrapper to grpc-java already supports setting Deadlines on Client Stubs (using the withDeadline function on stubs), however there is no "Kotlin coroutine" equivalent to the io.grpc.Context#withDeadline function that allows wrapping any operation into a Cancellable context with a deadline.

The problem is that the io.grpc.Context#withDeadline API requires using a ScheduledExecutorService, which as I understand it, would require bypassing Kotlin coroutine architecture. An alternative is to use withTimeout: however this results in 2 separate contextual timeouts (the withTimeout one and a potential propagated gRPC Deadline in the context).

Am I missing something? What would be the recommended approach?

Thanks!