Suggestion Needed: Integrating gRPC to Apache Mesos

[chh...@mesosphere.io]

Hi all,

I'm from the Apache Mesos community and I'm new to gRPC.

I've asked around in the gRPC Gitter channel but got no response,

so please let me ask my question again here.

We're planning on supporting the Container Storage Interface which is gRPC-based.

Since Mesos itself already has its own actor-based programming library handling asynchronous http requests,

I was wondering if it is possible to write our own gRPC request/response encoder/decoder

so we can integrate gRPC into our event loop and implement our own gRPC client,

and if it is worthwhile doing this. I appreciate if anyone can share their opinion or experience on this.

I've also followed this discussion: https://groups.google.com/forum/#!topic/grpc-io/CzgL7yB4JdQ

Is there any update related to this issue?

Thanks!

Chun-Hung

[Vijay Pai]

Hi there,

For your first question, gRPC is fundamentally a wire format protocol specified in https://github.com/grpc/grpc/blob/master/doc/PROTOCOL-HTTP2.md . As long as you support that wire format, you can implement gRPC in many ways. There are community-created implementations like grpc/grpc-haskell that use the grpc/grpc core in their implementations, as well as google/dorusu-js that doesn't use the grpc core at all but just implements the wire protocol in its own way. That said, the gRPC team only supports the languages under the officially supported repositories.

As for the second question, there is currently no completion queue implementation for gRPC core that allows integration with an external event loop, but there has been interest from a variety of sources, so it's still an open feature request.

- Vijay

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