Rust service

README.md

@@ -105,9 +105,17 @@ go install google.golang.org/grpc/cmd/protoc-gen-go-grpc@v1.2
 
 ### Rust services
 
+Update `rustc`
+
+```sh
+rustup update
+```
+
 #### [Tonic](https://github.com/hyperium/tonic)
 
 Tonic is a gRPC over HTTP/2 implementation focused on high performance, interoperability, and flexibility. This library was created to have first class support of async/await and to act as a core building block for production systems written in Rust.
 
+[Hello world tutorial](https://github.com/hyperium/tonic/blob/master/examples/helloworld-tutorial.md)
+
 
 [Rust and gRPC: A complete guide](https://blog.logrocket.com/rust-and-grpc-a-complete-guide/)

src/protos/serve_currenttime.proto

@@ -1,4 +1,5 @@
 syntax = "proto3";
+package serve_currenttime;
 
 service ServeCurrentTime {
   rpc GetCurrentTime(GetCurrentTimeRequest) returns (GetCurrentTimeResponse);

src/serve_currenttime/Cargo.toml

@@ -5,8 +5,14 @@ edition = "2021"
 
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
 
-[dependencies]
-
 [[bin]]
-    name = "server"
-    path = "src/server.rs"
+name = "serve_currenttime"
+path = "src/main.rs"
+
+[dependencies]
+tonic = "0.8"
+prost = "0.11"
+tokio = { version = "1.19.2", features = ["macros", "rt-multi-thread"] }
+
+[build-dependencies]
+tonic-build = "0.8"

src/serve_currenttime/Makefile

@@ -0,0 +1,2 @@
+run:
+	cargo run --bin serve_currenttime

src/serve_currenttime/build.rs

@@ -0,0 +1,4 @@
+fn main() -> Result<(), Box<dyn std::error::Error>> {
+    tonic_build::compile_protos("../protos/serve_currenttime.proto")?;
+    Ok(())
+}

src/serve_currenttime/src/main.rs

@@ -1,3 +1,61 @@
-fn main() {
-    println!("Hello, world!");
+use serve_currenttime::{
+    serve_current_time_server::{ServeCurrentTime, ServeCurrentTimeServer},
+    GetCurrentTimeRequest, GetCurrentTimeResponse,
+};
+
+// use serve_currenttime::{
+//     serve_currenttime_server::{ServeCurrentTime, ServeCurrentTimeServer},
+//     GetCurrentTimeRequest, GetCurrentTimeResponse,
+// };
+
+use tonic::{transport::Server, Request, Response, Status};
+
+pub mod serve_currenttime {
+    tonic::include_proto!("serve_currenttime");
+}
+
+#[tokio::main]
+async fn main() -> Result<(), Box<dyn std::error::Error>> {
+    let address = "[::1]:8080".parse().unwrap();
+    let voting_service = ServeCurrentTimeService::default();
+
+    Server::builder()
+        .add_service(ServeCurrentTimeServer::new(voting_service))
+        .serve(address)
+        .await?;
+    Ok(())
+}
+
+#[derive(Debug, Default)]
+pub struct ServeCurrentTimeService {}
+
+#[tonic::async_trait]
+impl ServeCurrentTime for ServeCurrentTimeService {
+    async fn get_current_time(
+        &self,
+        request: Request<GetCurrentTimeRequest>,
+    ) -> Result<Response<GetCurrentTimeResponse>, Status> {
+        let r = request.into_inner();
+
+        Ok(Response::new(GetCurrentTimeResponse {
+            formatted_time: "xxx".to_string(),
+            hours: 11,
+            minutes: 22,
+            seconds: 33,
+            milliseconds: 44,
+        }))
+
+        // match r.vote {
+        //     0 => Ok(Response::new(serve_currenttime::GetCurrentTimeResponse {
+        //         confirmation: { format!("Happy to confirm that you upvoted for {}", r.url) },
+        //     })),
+        //     1 => Ok(Response::new(serve_currenttime::GetCurrentTimeResponse {
+        //         confirmation: { format!("Confirmation that you downvoted for {}", r.url) },
+        //     })),
+        //     _ => Err(Status::new(
+        //         tonic::Code::OutOfRange,
+        //         "Invalid vote provided",
+        //     )),
+        // }
+    }
 }