I was trying to implement a generic way to create a message

Question

I was trying to implement a generic way to create a message in gRPC without creating a Kotlin specific code generator I wondered if there was a way to just pass SendRequest as a type and infer the SendRequest Builder indeed I cannot things like T Builder

Nikky · Answer

is it maybe possible to derive Messgae from Message Builder so your only type arguemnt would be Message Builder

Nikky · Answer

or is builder having generic parameters that can be used

coder82 · Answer

uhmm let me check maybe

coder82 · Answer

I need to dig into the gRPC generated code

coder82 · Answer

uhm found getDefaultInstanceForType I might be able to use that

coder82 · Answer

ok I ll give it a shot and see

Nikky · Answer

but that will not be available for getting the returntype probably

coder82 · Answer

yes it s a bit difficult indeed

coder82 · Answer

from Message there is a way to get Message Builder but still then I don t have it s type

coder82 · Answer

and viceversa

coder82 · Answer

From Message Builder I can get Message

gildor · Answer

A bit offtopic just want mention that there are a few projects that provide Kotlin specific generators for gRPC Like <https github com marcoferrer kroto plus>

coder82 · Answer

yes am aware of that but he relies on code generation

gildor · Answer

yes sure

gildor · Answer

same way as grpc for java

gildor · Answer

nothing wrong to write some helper for gRPC java code tho Just thought that it worth to mention

coder82 · Answer

I suggested some helpers here at the end <https github com Kotlin kotlinx coroutines issues 360>

coder82 · Answer

hopefully they can pick as a suggestion for the integration proposal

gildor · Answer

I really against any gRPC integration in kotlinx coroutines

coder82 · Answer

ah why

gildor · Answer

Because each integration should depend on particular generation code

gildor · Answer

probably just better to keep it separately

gildor · Answer

also default Java generated code just doesn t allow to write simple coroutine adapter

coder82 · Answer

indeed I agree with you I figured it out myself code generators I try to avoid if I can

gildor · Answer

I m not really understand what you mean gt The idea of having the code automatically generated is very nice but in my case adding an extra step to the the build is more cumbersome But you already have this step to generate Jva

gildor · Answer

it s just impossible to use gRPC without code generation this is whole point of gRPC to have generated services and data objects

coder82 · Answer

Indeed I see I stumbled into problems

gildor · Answer

good thing that gRPC gradle plugin allows to have custom code generator plugin so you can replace Java code generation with Kotlin code generation and provide data classes coroutines and all other Kotlin features

gildor · Answer

bad thing that it s really big project and hope community at some point focus on some single library kroto plus or grpc kotlin

gildor · Answer

Maybe even gRPC team will help