test(benches): update pipeline benchmark to async/await

Cargo.toml

@@ -151,10 +151,10 @@ required-features = ["runtime"]
 #path = "benches/end_to_end.rs"
 #required-features = ["runtime"]
 
-#[[bench]]
-#name = "pipeline"
-#path = "benches/pipeline.rs"
-#required-features = ["runtime"]
+[[bench]]
+name = "pipeline"
+path = "benches/pipeline.rs"
+required-features = ["runtime"]
 
 #[[bench]]
 #name = "server"

benches/pipeline.rs

@@ -1,21 +1,19 @@
+#![feature(async_await)]
 #![feature(test)]
 #![deny(warnings)]
 
-extern crate futures;
-extern crate hyper;
-extern crate pretty_env_logger;
 extern crate test;
-extern crate tokio;
 
 use std::io::{Read, Write};
 use std::net::{TcpStream};
 use std::sync::mpsc;
+use std::time::Duration;
 
-use futures::Future;
-use futures::sync::oneshot;
+use tokio::runtime::current_thread;
+use tokio::sync::oneshot;
 
 use hyper::{Body, Response, Server};
-use hyper::service::service_fn_ok;
+use hyper::service::{make_service_fn, service_fn};
 
 const PIPELINED_REQUESTS: usize = 16;
 
@@ -23,24 +21,34 @@ const PIPELINED_REQUESTS: usize = 16;
 fn hello_world(b: &mut test::Bencher) {
     let _ = pretty_env_logger::try_init();
     let (_until_tx, until_rx) = oneshot::channel::<()>();
+
     let addr = {
         let (addr_tx, addr_rx) = mpsc::channel();
-        ::std::thread::spawn(move || {
+        std::thread::spawn(move || {
             let addr = "127.0.0.1:0".parse().unwrap();
+
+            let make_svc = make_service_fn(|_| async {
+                Ok::<_, hyper::Error>(service_fn(|_| async {
+                    Ok::<_, hyper::Error>(Response::new(Body::from("Hello, World!")))
+                }))
+            });
             let srv = Server::bind(&addr)
                 .http1_pipeline_flush(true)
-                .serve(|| {
-                    service_fn_ok(move |_| {
-                        Response::new(Body::from("Hello, World!"))
-                    })
-                });
+                .serve(make_svc);
+
             addr_tx.send(srv.local_addr()).unwrap();
-            let fut = srv
-                .map_err(|e| panic!("server error: {}", e))
-                .select(until_rx.then(|_| Ok(())))
-                .then(|_| Ok(()));
-            let mut rt = tokio::runtime::current_thread::Runtime::new().unwrap();
-            rt.spawn(fut);
+
+            let graceful = srv
+                .with_graceful_shutdown(async {
+                    until_rx.await.ok();
+                });
+
+            let mut rt = current_thread::Runtime::new().unwrap();
+            rt.spawn(async {
+                if let Err(e) = graceful.await {
+                    panic!("server error: {}", e);
+                }
+            });
             rt.run().unwrap();
         });
 
@@ -60,7 +68,7 @@ fn hello_world(b: &mut test::Bencher) {
     } * PIPELINED_REQUESTS;
 
     let mut tcp = TcpStream::connect(addr).unwrap();
-    tcp.set_read_timeout(Some(::std::time::Duration::from_secs(3))).unwrap();
+    tcp.set_read_timeout(Some(Duration::from_secs(3))).unwrap();
     let mut buf = [0u8; 8192];
 
     b.bytes = (pipelined_reqs.len() + total_bytes) as u64;