Exception handling and transport of exceptions

[joseffilzmaier]

Hey there, thank you for the library, it's looking really neat!

Client target: Android Server target: JVM

I am using the default RPC implementation (i think it's called kRPC) and have have a few remarks/questions regarding exceptions/error handling: Right now, if i make a request from the client and the server throws an exception, the whole whole exception, stacktrace inclusive, is being transferred to the client.

I have a few issues with this approach:

• I would like to not send the whole stack trace if an exception occurs. Is there any way currently or planned so that i can customize what happens in case of an exception?
• The exception handling client side does not work as expected on my end: If i wrap the suspending function call with a try/catch i cannot catch it - It still crashes my whole app. I am currently not sure where the exception is thrown, but i believe it to be in some kind of background coroutine that has no Exception Handler set. It would be nice if i would simply be able to catch the exception client side somehow.

Are there any plans on improving remote exception handling, or am i missing some information here?

[Mr3zee]

Hey! Thank you for the feedback! We are working on the improved exception handling and we'll take this into account!

[Rattlyy]

I suggest you try using runCatching {} and return Result<> classes instead

[lsafer-meemer]

I suggest you try using runCatching {} and return Result<> classes instead

Are Result classes serializable? and if so, how could we guarantee that the class of the exception thrown exists at the client?

The true solution for this issue would either be "either" from arrow-kt with the EitherSerializer added to the serializers module:

val CustomSerializersModule = SerializersModule {
    contextual(Either::class) { (leftSerializer, rightSerializer) ->
        EitherSerializer(leftSerializer, rightSerializer)
    }
}

Or union types when they come someday: https://youtrack.jetbrains.com/issue/KT-68296/Union-Types-for-Errors