Add unique id counter to request tracing span. (fixes #112)

Signed-off-by: Jason Volk <jason@zemos.net>

src/core/metrics/mod.rs

@@ -1,4 +1,4 @@
-use std::sync::atomic::AtomicU32;
+use std::sync::atomic::{AtomicU32, AtomicU64};
 
 use tokio::runtime;
 use tokio_metrics::TaskMonitor;
@@ -19,8 +19,9 @@ pub struct Metrics {
 	runtime_intervals: std::sync::Mutex<Option<RuntimeIntervals>>,
 
 	// TODO: move stats
+	pub requests_count: AtomicU64,
+	pub requests_handle_finished: AtomicU64,
 	pub requests_handle_active: AtomicU32,
-	pub requests_handle_finished: AtomicU32,
 	pub requests_panic: AtomicU32,
 }
 
@@ -48,8 +49,9 @@ impl Metrics {
 			#[cfg(tokio_unstable)]
 			runtime_intervals: std::sync::Mutex::new(runtime_intervals),
 
+			requests_count: AtomicU64::new(0),
+			requests_handle_finished: AtomicU64::new(0),
 			requests_handle_active: AtomicU32::new(0),
-			requests_handle_finished: AtomicU32::new(0),
 			requests_panic: AtomicU32::new(0),
 		}
 	}

src/router/request.rs

@@ -15,7 +15,18 @@ use tracing::Span;
 use tuwunel_core::{Result, debug, debug_error, debug_warn, err, error, trace};
 use tuwunel_service::Services;
 
-#[tracing::instrument(name = "request", level = "debug", skip_all)]
+#[tracing::instrument(
+	name = "request",
+	level = "debug",
+	skip_all,
+	fields(
+		id = %services
+			.server
+			.metrics
+			.requests_count
+			.fetch_add(1, Ordering::Relaxed)
+	)
+)]
 pub(crate) async fn handle(
 	State(services): State<Arc<Services>>,
 	req: http::Request<axum::body::Body>,