Feature: C Client

[rupurt]

Current behavior

Add an officially supported C client. This would enable any language that supports the C ABI to create bindings e.g. C++, Zig, ...

Suggested solution

No response

Additional context

No response

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Contributing Docs

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[yanivbh1]

Hey @rupurt,
Thanks for the request.
Adding it to the "future discussion" board.

[g41797]

Hey @rupurt,
could you please add short description of required flows?
(this is also a check that you still need this functionality)

i am thinking about possibility to add gRPC access to memphis
it will allow to generate code of the client side and as far as i understand c++ is supported by gRPC
i am not sure regarding C :-(

[ChibangLW]

I am looking for a C++ SDK. gRPC would definitely solve produce and consume but would probably not work for other SDK functions like creating a station.

I started on compiling the go SDK as a c library and building a C++ wrapper around it. It worked for simple string consume and produce. I haven't had time to dive deeper into all functions, e.g. protobuf or json.

[g41797]

I'd like to clarify proposed solution:

• proto files - definitions of structures and apis
• generation of go code for client and server
• implementation of go based gRPC server process (memphis bridge)
  • receive grpc "requests"
  • "translates" to memphis
  • this process runs as stand alone or as part of memphis containers
• you can generate C++/PHP/etc client code and use it in own application

see grpcadapter repo

[g41797]

Supported APIs:

service AdapterService {
	rpc CreateStation(CreateStationRequest) returns (Status) {}
	rpc DestroyStation(DestroyStationRequest) returns (Status) {}
	rpc Produce(stream ProduceMessages) returns (Status) {}
	rpc Consume(stream ConsumeMessages) returns (stream ConsumeResponse) {}
}

see proto files