ORTOOLS support in GoLang

[Dheeraj Panyam]

 Does  the ORTOOLS suite have a swig interface for GoLang. Can I code the Vehicle Routing System in GO?

[core...@google.com]

Hi,

Currently there is no plan to support GoLang...
We provide C++ (native), and binding on Python (2.7, 3.5, 3.6), Java and C#

[NF]

Hello,

I also would like to use OR-Tools in Golang.

Especially on Google App Engine.

Any plan to support GAE/Go?

[Laurent Perron]

Right now, we have no plan for that as we just miss the knowledge to build go interface, writing the necessary go files (and the time to do it :-) ).

Out of curiosity, what solver do you wish to use?

For the CP-SAT and the linear solver, there is a protobuf interface, so a server on Google Compute Engine, and a grpc call from App Engine to the server, passing a protobuf in between the two could do the trick.

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[NF]

Hello,

Thanks for response.

I would like to use MIP solver.

Can I use it via gRPC?

[NF]

Hello,

I would like to know if MIP solver supports gRPC.

Also is there any document for using or-tools via gRPC?

2018年8月31日金曜日 17時29分11秒 UTC+9 NF:

[AM]

Hi Laurent

Would you mind describing the steps to create a Google Compute Engine Server via gRPC, e.g.

• Defining a unary gRPC the service to linear_solver.proto,   service OR-Tools { rpc LinearSolver(MPModelRequest) returns (MPSolutionResponse) {}}
• Generating the gRPC server interface
  
• ???
  

Thanks

[Laurent Perron]

I am really not the right person to ask :-)

To view this discussion on the web visit https://groups.google.com/d/msgid/or-tools-discuss/b88f0fb5-b934-4be6-8985-c6ce85859984n%40googlegroups.com.

[AM]

I can develop that but I need one of the OR-Tools contributors to help me.

[Mizux Dev]

Use the OSS Community force luke !

Seems there is a fork with plenty of go related stuff concerning routing...

https://github.com/AirspaceTechnologies/or-tools/tree/airspace/ortools/gen/ortools/go

https://github.com/AirspaceTechnologies/or-tools/tree/airspace/ortools/constraint_solver/go

disclaimer: I didn't play with it and I don't know if if follow the proper way to wrap code to Golang using swig.

[AM]

Thanks. I am using Laurent's idea to create a gRPC/protobuf and change linear_solver_protocol_buffers.cc to be a gRPC server via

syntax = "proto3";

import "or-tools/ortools/linear_solver/linear_solver.proto";

package operations_research;service MPService {
rpc MPModel(MPModelRequest) returns (MPSolutionResponse) {};
}

Then I can use any language which gRPC supports to interact with or-tools. To me, that is an easier way to create a swig wrapper for Golang