Add tracing

problem_04/bin/server.rs

@@ -2,16 +2,22 @@ use std::collections::HashMap;
 use std::sync::Mutex;
 use std::{io, net::SocketAddr, str, sync::Arc};
 use tokio::{net::UdpSocket, sync::mpsc};
+use tracing::info;
 
 #[tokio::main]
 async fn main() -> io::Result<()> {
-    let sock = UdpSocket::bind("0.0.0.0:8080".parse::<SocketAddr>().unwrap()).await?;
+    tracing_subscriber::fmt::try_init().unwrap();
+
+    let sock = UdpSocket::bind("0.0.0.0:1222".parse::<SocketAddr>().unwrap()).await?;
+    info!("listening to new connections");
+
     let r = Arc::new(sock);
     let s = r.clone();
     let (tx, mut rx) = mpsc::channel::<(Vec<u8>, SocketAddr)>(1_000);
     let storage = Arc::new(Mutex::new(HashMap::<String, String>::new()));
 
     tokio::spawn(async move {
+        info!("Send back!");
         while let Some((bytes, addr)) = rx.recv().await {
             let _ = s.send_to(&bytes, &addr).await.unwrap();
         }
@@ -19,6 +25,7 @@ async fn main() -> io::Result<()> {
 
     let mut buf = [0; 1024];
     loop {
+        info!("Recv loop");
         let (len, addr) = r.recv_from(&mut buf).await?;
         let message = str::from_utf8(&buf[..len]).unwrap().trim_matches('\n');