refactor: Add more debugging facilities into examples

Cargo.toml

@@ -23,3 +23,4 @@ tower = { version = "0.4", features = ["full"] }
 [dev-dependencies]
 eyre = "0.6"
 tracing-subscriber = "0.3"
+console-subscriber = "0.1"

examples/simple.rs

@@ -14,15 +14,18 @@ async fn handle_req(req: Request) -> eyre::Result<Response> {
 
 #[tokio::main]
 async fn main() -> eyre::Result<()> {
-    tracing_subscriber::fmt()
-        .with_max_level(tracing::Level::TRACE)
-        .init();
+    setup_logging();
 
     let incoming = AddrIncoming::new("127.0.0.1:4567").await?;
 
     let make_service = tower::service_fn(|addr: &AddrStream| {
-        tracing::debug!("Accept: {} -> {}", addr.remote_addr, addr.local_addr);
-        futures::future::ok::<_, std::convert::Infallible>(tower::service_fn(handle_req))
+        tracing::debug!(remote_addr = %addr.remote_addr, local_addr = %addr.local_addr, "accept");
+
+        let service = tower::ServiceBuilder::new()
+            .buffer(16)
+            .service_fn(handle_req);
+
+        futures::future::ok::<_, std::convert::Infallible>(service)
     });
 
     let server = Server::new(incoming).serve(make_service);
@@ -30,3 +33,23 @@ async fn main() -> eyre::Result<()> {
 
     Ok(())
 }
+
+// Don't mind this, this is just for debugging.
+fn setup_logging() {
+    use tracing_subscriber::prelude::*;
+
+    tracing_subscriber::registry()
+        .with(console_subscriber::spawn())
+        .with(
+            tracing_subscriber::fmt::layer().with_filter(
+                tracing_subscriber::filter::Targets::new()
+                    .with_default(tracing::Level::DEBUG)
+                    .with_target("boitalettres", tracing::Level::TRACE)
+                    .with_target("simple", tracing::Level::TRACE)
+                    .with_target("tower", tracing::Level::TRACE)
+                    .with_target("tokio_tower", tracing::Level::TRACE)
+                    .with_target("mio", tracing::Level::TRACE),
+            ),
+        )
+        .init();
+}