Clean up main crate and more work on macro

Signed-off-by: Lucio Franco <[email protected]>

tonic-examples/src/helloworld/server.rs

@@ -0,0 +1,67 @@
+#![feature(async_await)]
+
+use std::time::Duration;
+use tokio::{timer::Delay, net::TcpListener};
+use tonic::{Request, Response, Status};
+use tower_h2::Server;
+
+mod proto {
+    #[derive(Clone, PartialEq, prost::Message)]
+    pub struct HelloRequest {
+        #[prost(string, tag = "1")]
+        pub name: std::string::String,
+    }
+    /// The response message containing the greetings
+    #[derive(Clone, PartialEq, prost::Message)]
+    pub struct HelloReply {
+        #[prost(string, tag = "1")]
+        pub message: std::string::String,
+    }
+}
+
+#[derive(Default, Clone)]
+pub struct MyGreeter {
+    data: String,
+}
+
+#[tonic::server(service = "helloworld.Greeter", proto = "proto")]
+impl MyGreeter {
+    pub async fn say_hello(&self, request: Request<proto::HelloRequest>) -> Result<Response<proto::HelloReply>, Status> {
+        println!("Got a request: {:?}", request);
+
+        let string = &self.data;
+
+        let when = tokio::clock::now() + Duration::from_millis(100);
+        Delay::new(when).await;
+
+        println!("My data: {:?}", string);
+
+        Delay::new(when).await;
+        
+        let reply = HelloReply {
+            message: "Zomg, it works!".into(),
+        };
+        Ok(Response::new(reply))
+    }
+}
+
+#[tokio::main]
+async fn main() -> Result<(), Box<dyn std::error::Error>> {
+    let addr = "[::1]:50051".parse().unwrap();
+    let mut bind = TcpListener::bind(&addr)?;
+
+    let greeter = MyGreeter::default();
+    let mut server = Server::new(GrpcServer::new(greeter), Default::default());
+
+    while let Ok((sock, _addr)) = bind.accept().await {
+        if let Err(e) = sock.set_nodelay(true) {
+            return Err(e.into());
+        }
+
+        if let Err(e) = server.serve(sock).await {
+            println!("H2 ERROR: {}", e);
+        }
+    }
+
+    Ok(())
+}