Merge pull request #742 from joshtriplett/simple-state-example

Add simple state example

Author: jbr

examples/state.rs

@@ -0,0 +1,33 @@
+use std::sync::atomic::{AtomicU32, Ordering};
+use std::sync::Arc;
+
+#[derive(Clone)]
+struct State {
+    value: Arc<AtomicU32>,
+}
+
+impl State {
+    fn new() -> Self {
+        Self {
+            value: Arc::new(AtomicU32::new(0)),
+        }
+    }
+}
+
+#[async_std::main]
+async fn main() -> tide::Result<()> {
+    tide::log::start();
+    let mut app = tide::with_state(State::new());
+    app.at("/").get(|req: tide::Request<State>| async move {
+        let state = req.state();
+        let value = state.value.load(Ordering::Relaxed);
+        Ok(format!("{}\n", value))
+    });
+    app.at("/inc").get(|req: tide::Request<State>| async move {
+        let state = req.state();
+        let value = state.value.fetch_add(1, Ordering::Relaxed) + 1;
+        Ok(format!("{}\n", value))
+    });
+    app.listen("127.0.0.1:8080").await?;
+    Ok(())
+}