How to create a dotnet gRPC server without using concrete instances - grpc

Question

So I am trying to build a .Net Core app that has both REST and gRPC.
Expected results: To have one app running that supports a working REST on one port and gRPC on another.
REST is easy. It's where the app starts. But to configure gRPC's port I saw I needed to create a Server instance:
Server server = new Server
{
Services = { Greeter.BindService(new GreeterImpl()) }
Ports = { new ServerPort("0.0.0.0", 5001, ServerCredentials.Insecure) }
};
server.Start();
That's all fine until we actually put it to use and like any other "Controller" GreeterImpl needs Dependency Injection of services:
private readonly IExampleService _exampleService;
public GreeterImpl (IExampleService exampleService)
{
_exampleService = exampleService;
}
Now the first code snippet will not work since the "new GreeterImpl()" requires an IExampleService.
I searched the web on how to get a ServerServiceDefinition (the thing returned from Greeter.BindService() ) without the use of concrete implementations but found nothing. So, how should this be done or am I on a totally wrong path?

Answer 1

So, I was going at it with the wrong idea. Turns our you can use
app.ApplicationServices.GetService(typeof({YOUR_SERVICE}))
Where "app" is "IApplicationBuilder"
And then just use the resulting service in the ".BindService()".
In the end we don't change the ".BindService()" but pass it a working service to bind.
Important note: You have to register your service first. In my case I used AutoFac to register it