grpc Server running on Android

[anilm...@gmail.com]

Is there an example or implementation of GRPC server (Java/C++) running on Android?

I am following grpc java server example to implement the server i

private class GrpcServerTask extends AsyncTask<Void, Void, String>{

    @Override

    protected void onPreExecute() {

    }

    @Override

    protected String doInBackground(Void... params) {

        int port = 50051;

        Server server;

        try {

            server = ServerBuilder.forPort(port)

                    .addService(new GreeterImpl())

                    .build()

                    .start();

        } catch (Exception e) {

            e.printStackTrace();

        }

        return null;

    }

}

private class GreeterImpl extends GreeterGrpc.GreeterImplBase {

    @Override

    public void sayHello(HelloRequest req, StreamObserver<HelloReply> responseObserver) {

        HelloReply reply = HelloReply.newBuilder().setMessage("Hello " + req.getName()).build();

        responseObserver.onNext(reply);

        responseObserver.onCompleted();

    }

}

I keep getting the error io.grpc.ManagedChannelProvider$ProviderNotFoundException: No functional server found. Try adding a dependency on the grpc-netty artifact

on executing new GrpcServerTask().execute();

Thanks,

Anil

[Carl Mastrangelo]

There isn't support for running a Java Server on Android currently.  If you want to do in process communication, we do have support for that.

As for your specific error, it happens because we use a ServiceLoader to find implementations.  We don't have such a file on Android.  You may want to use C++ in your case.

[Carl Mastrangelo]

As a followup, I am kind of curious what your use case is?  

I have created a tracking issue here https://github.com/grpc/grpc-java/issues/2273 .  Feel free to ping that issue.