docs(examples): update state example to async/await

examples/state.rs

@@ -0,0 +1,56 @@
+#![feature(async_await)]
+#![deny(warnings)]
+
+use std::sync::{Arc, atomic::{AtomicUsize, Ordering}};
+
+use hyper::{Body, Error, Response, Server};
+use hyper::service::{make_service_fn, service_fn};
+
+#[hyper::rt::main]
+async fn main() {
+    pretty_env_logger::init();
+
+    let addr = ([127, 0, 0, 1], 3000).into();
+
+    // For the most basic of state, we just share a counter, that increments
+    // with each request, and we send its value back in the response.
+    let counter = Arc::new(AtomicUsize::new(0));
+
+    // The closure inside `make_service_fn` is run for each connection,
+    // creating a 'service' to handle requests for that specific connection.
+    let make_service = make_service_fn(move |_| {
+        // While the state was moved into the make_service closure,
+        // we need to clone it here because this closure is called
+        // once for every connection.
+        //
+        // Each connection could send multiple requests, so
+        // the `Service` needs a clone to handle later requests.
+        let counter = counter.clone();
+
+        async move {
+            // This is the `Service` that will handle the connection.
+            // `service_fn` is a helper to convert a function that
+            // returns a Response into a `Service`.
+            Ok::<_, Error>(service_fn(move |_req| {
+                // Get the current count, and also increment by 1, in a single
+                // atomic operation.
+                let count = counter.fetch_add(1, Ordering::AcqRel);
+                async move {
+                    Ok::<_, Error>(
+                        Response::new(Body::from(format!("Request #{}", count)))
+                    )
+                }
+            }))
+        }
+    });
+
+    let server = Server::bind(&addr)
+        .serve(make_service);
+
+    println!("Listening on http://{}", addr);
+
+    if let Err(e) = server.await {
+        eprintln!("server error: {}", e);
+    }
+}
+

examples_disabled/state.rs

@@ -1,55 +0,0 @@
-#![deny(warnings)]
-extern crate hyper;
-extern crate pretty_env_logger;
-extern crate serde_json;
-
-use std::sync::{Arc, atomic::{AtomicUsize, Ordering}};
-
-use hyper::{Body, Response, Server};
-use hyper::service::service_fn_ok;
-use hyper::rt::{self, Future};
-
-fn main() {
-    pretty_env_logger::init();
-
-    let addr = ([127, 0, 0, 1], 3000).into();
-
-    // For the most basic of state, we just share a counter, that increments
-    // with each request, and we send its value back in the response.
-    let counter = Arc::new(AtomicUsize::new(0));
-
-    // new_service is run for each connection, creating a 'service'
-    // to handle requests for that specific connection.
-    let new_service = move || {
-        // While the state was moved into the new_service closure,
-        // we need to clone it here because this closure is called
-        // once for every connection.
-        //
-        // Each connection could send multiple requests, so
-        // the `Service` needs a clone to handle later requests.
-        let counter = counter.clone();
-
-        // This is the `Service` that will handle the connection.
-        // `service_fn_ok` is a helper to convert a function that
-        // returns a Response into a `Service`.
-        //
-        // If you wanted to return a `Future` of a `Response`, such as because
-        // you wish to load data from a database or do other things, you
-        // could change this to `service_fn` instead.
-        service_fn_ok(move |_req| {
-            // Get the current count, and also increment by 1, in a single
-            // atomic operation.
-            let count = counter.fetch_add(1, Ordering::AcqRel);
-            Response::new(Body::from(format!("Request #{}", count)))
-        })
-    };
-
-    let server = Server::bind(&addr)
-        .serve(new_service)
-        .map_err(|e| eprintln!("server error: {}", e));
-
-    println!("Listening on http://{}", addr);
-
-    rt::run(server);
-}
-