On Dec 18, 2017, at 4:53 PM, Stuart Douglas <stuart.w.douglas@gmail.com> wrote:

On Tue, Dec 19, 2017 at 3:20 AM, Rostislav Svoboda <rsvoboda@redhat.com> wrote:

tl;dr: I'm not sure WF is the right place for GRPC integration

1) footprint
  io.grpc: grpc-core grpc-protobuf grpc-stub with deps take 6.1 MB (using version 1.5.0)

Not much we can do about that, but it won’t be loaded unless you are using it.

Also once we have provisioning then it could be easily removed and/or kept as an optional feature.

2) speed of development
  version 1.5.0 in July
  version 1.8.0 in November
  speed itself is not the main problem, point 3) is more concerning

3) changes in minor releases
I tried mvn clean package -Dgrpc.version=1.8.0 on undertow-grpc and got compilation failure with 18 errors

Yea, that is somewhat annoying. I don’t think it affects the wire protocol though, just the Java SPI (even though they provide an integration SPI I don't think anyone has really tried to use it before, and provide a transport outside what is already provided in the distribution).

Even with the SPI  it looks fairly reasonable: going through the history it appears they deprecate stuff first, then many releases later remove the deprecated methods. Of course I might have missed something.