set up gprc server

planetwars-server/Cargo.toml

@@ -26,9 +26,14 @@ toml = "0.5"
 planetwars-matchrunner = { path = "../planetwars-matchrunner" }
 config = { version = "0.12", features = ["toml"] }
 thiserror = "1.0.31"
+prost = "0.10"
+tonic = "0.7.2"
 
 # TODO: remove me
 shlex = "1.1"
 
+[build-dependencies]
+tonic-build = "0.7.2"
+
 [dev-dependencies]
 parking_lot = "0.11"

planetwars-server/build.rs

@@ -0,0 +1,9 @@
+extern crate tonic_build;
+
+fn main() -> Result<(), Box<dyn std::error::Error>> {
+    tonic_build::configure()
+        .build_server(true)
+        .build_client(false)
+        .compile(&["../proto/bot_api.proto"], &["../proto"])?;
+    Ok(())
+}

planetwars-server/src/modules/bot_api.rs

@@ -0,0 +1,30 @@
+pub mod pb {
+    tonic::include_proto!("grpc.planetwars.bot_api");
+}
+
+use std::net::SocketAddr;
+
+use tonic;
+use tonic::transport::Server;
+use tonic::{Request, Response, Status};
+
+pub struct BotApiServer {}
+
+#[tonic::async_trait]
+impl pb::test_service_server::TestService for BotApiServer {
+    async fn greet(&self, req: Request<pb::Hello>) -> Result<Response<pb::HelloResponse>, Status> {
+        Ok(Response::new(pb::HelloResponse {
+            response: format!("hallo {}", req.get_ref().hello_message),
+        }))
+    }
+}
+
+pub async fn run_bot_api() {
+    let server = BotApiServer {};
+    let addr = SocketAddr::from(([127, 0, 0, 1], 50051));
+    Server::builder()
+        .add_service(pb::test_service_server::TestServiceServer::new(server))
+        .serve(addr)
+        .await
+        .unwrap()
+}

planetwars-server/src/modules/mod.rs

@@ -1,5 +1,6 @@
 // This module implements general domain logic, not directly
 // tied to the database or API layers.
+pub mod bot_api;
 pub mod bots;
 pub mod matches;
 pub mod ranking;

proto/bot_api.proto

@@ -0,0 +1,15 @@
+syntax = "proto3";
+
+package grpc.planetwars.bot_api;
+
+message Hello {
+  string hello_message = 1;
+}
+
+message HelloResponse {
+  string response = 1;
+}
+
+service TestService {
+  rpc greet(Hello) returns (HelloResponse);
+}