Returning Services within a Service Definition File

[ebitogu]

I have a bunch of proto files with each meant for a specific task as below:

The first one is called location.proto

syntax = "proto3";

package location;

import "protos/auth.proto";

service LocationManager{
    rpc updateLocation(LocationUpdateRequest) returns (LocationUpdateResponse);
}

enum LocationUpdateTarget{
    CUSTOMER = 0;
    RIDER = 1;
}

message Location{
     double longitude = 3;
     double latitude = 4;
}

message LocationUpdateRequest{
    auth.AuthParams authParams = 1;
    LocationUpdateTarget locationUpdateTarget = 2;
    Location location = 3;
}

message LocationUpdateResponse{
    int32 statusCode = 1;
}

And then I have the index.proto file that is referencing the above location.proto file as below:

syntax = "proto3";

package service_locator;

import "protos/location.proto";
import "protos/order.proto";

service ServiceLocator{
    rpc getLocationService (noparams) returns (location.LocationManager());
    // rpc getOrderService (noparams) returns (order.OrderManager());
}

message noparams{}

Whenever I pass the index.proto file to the grpc-protoloader I am getting the following error

Error: illegal token '(', ')' expected (line 12)

I have no idea where the error is coming from and no idea what it means.

What could I be doing wrong with my index.proto file?

Thanks in anticipation for your help.

[murgatroid99]

Your ServiceLocator definition does not look valid. An RPC can't return a service or method, it can only return a message. And this syntax location.LocationManager() with the parentheses doesn't look like any protobuf syntax I'm familiar with.