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add yielder type to axum examples #4

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Merged
GlenDC merged 1 commit into from
Sep 10, 2025
Merged

add yielder type to axum examples #4

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106 changes: 55 additions & 51 deletions examples/axum-activity-feed.rs
View file
Open in desktop
Original file line number Diff line number Diff line change
@@ -1,9 +1,9 @@
use {
asynk_strim::stream_fn,
asynk_strim::{Yielder, stream_fn},
axum::{
Router,
extract::Path,
response::{Html, IntoResponse, Sse},
response::{Html, IntoResponse, Sse, sse::Event},
routing::{get, post},
},
core::{convert::Infallible, error::Error, time::Duration},
Expand Down Expand Up @@ -80,36 +80,38 @@ async fn generate(ReadSignals(signals): ReadSignals<Signals>) -> impl IntoRespon
let mut done = signals.done;

// Start the SSE stream
Sse::new(stream_fn(move |mut yielder| async move {
// Signal event generation start
let patch = PatchSignals::new(r#"{{"generating": true}}"#);
let sse_event = patch.write_as_axum_sse_event();
yielder.yield_item(Ok::<_, Infallible>(sse_event)).await;

// Yield the events elements and signals to the stream
for _ in 1..=signals.events {
total += 1;
done += 1;
// Append a new entry to the activity feed
let elements = event_entry(&Status::Done, total, "Auto");
let patch = PatchElements::new(elements)
.selector("#feed")
.mode(ElementPatchMode::After);
Sse::new(stream_fn(
move |mut yielder: Yielder<Result<Event, Infallible>>| async move {
// Signal event generation start
let patch = PatchSignals::new(r#"{{"generating": true}}"#);
let sse_event = patch.write_as_axum_sse_event();
yielder.yield_item(Ok::<_, Infallible>(sse_event)).await;

// Update the event counts
let patch = PatchSignals::new(format!(r#"{{"total": {total}, "done": {done}}}"#));
yielder.yield_item(Ok(sse_event)).await;

// Yield the events elements and signals to the stream
for _ in 1..=signals.events {
total += 1;
done += 1;
// Append a new entry to the activity feed
let elements = event_entry(&Status::Done, total, "Auto");
let patch = PatchElements::new(elements)
.selector("#feed")
.mode(ElementPatchMode::After);
let sse_event = patch.write_as_axum_sse_event();
yielder.yield_item(Ok(sse_event)).await;

// Update the event counts
let patch = PatchSignals::new(format!(r#"{{"total": {total}, "done": {done}}}"#));
let sse_event = patch.write_as_axum_sse_event();
yielder.yield_item(Ok(sse_event)).await;
tokio::time::sleep(Duration::from_millis(signals.interval)).await;
}

// Signal event generation end
let patch = PatchSignals::new(r#"{{"generating": false}}"#);
let sse_event = patch.write_as_axum_sse_event();
yielder.yield_item(Ok::<_, Infallible>(sse_event)).await;
tokio::time::sleep(Duration::from_millis(signals.interval)).await;
}

// Signal event generation end
let patch = PatchSignals::new(r#"{{"generating": false}}"#);
let sse_event = patch.write_as_axum_sse_event();
yielder.yield_item(Ok::<_, Infallible>(sse_event)).await;
}))
yielder.yield_item(Ok(sse_event)).await;
},
))
}

/// Creates one event with a given status
Expand All @@ -118,27 +120,29 @@ async fn event(
ReadSignals(signals): ReadSignals<Signals>,
) -> impl IntoResponse {
// Create the event stream, since we're patching both an element and a signal.
Sse::new(stream_fn(move |mut yielder| async move {
// Signal the updated event counts
let total = signals.total + 1;
let signals = match status {
Status::Done => format!(r#"{{"total": {total}, "done": {}}}"#, signals.done + 1),
Status::Warn => format!(r#"{{"total": {total}, "warn": {}}}"#, signals.warn + 1),
Status::Fail => format!(r#"{{"total": {total}, "fail": {}}}"#, signals.fail + 1),
Status::Info => format!(r#"{{"total": {total}, "info": {}}}"#, signals.info + 1),
};
let patch = PatchSignals::new(signals);
let sse_signal = patch.write_as_axum_sse_event();
yielder.yield_item(Ok::<_, Infallible>(sse_signal)).await;

// Patch an element and append it to the feed
let elements = event_entry(&status, total, "Manual");
let patch = PatchElements::new(elements)
.selector("#feed")
.mode(ElementPatchMode::After);
let sse_event = patch.write_as_axum_sse_event();
yielder.yield_item(Ok::<_, Infallible>(sse_event)).await;
}))
Sse::new(stream_fn(
move |mut yielder: Yielder<Result<Event, Infallible>>| async move {
// Signal the updated event counts
let total = signals.total + 1;
let signals = match status {
Status::Done => format!(r#"{{"total": {total}, "done": {}}}"#, signals.done + 1),
Status::Warn => format!(r#"{{"total": {total}, "warn": {}}}"#, signals.warn + 1),
Status::Fail => format!(r#"{{"total": {total}, "fail": {}}}"#, signals.fail + 1),
Status::Info => format!(r#"{{"total": {total}, "info": {}}}"#, signals.info + 1),
};
let patch = PatchSignals::new(signals);
let sse_signal = patch.write_as_axum_sse_event();
yielder.yield_item(Ok(sse_signal)).await;

// Patch an element and append it to the feed
let elements = event_entry(&status, total, "Manual");
let patch = PatchElements::new(elements)
.selector("#feed")
.mode(ElementPatchMode::After);
let sse_event = patch.write_as_axum_sse_event();
yielder.yield_item(Ok(sse_event)).await;
},
))
}

/// Returns an HTML string for the entry
Expand Down
24 changes: 13 additions & 11 deletions examples/axum-hello.rs
View file
Open in desktop
Original file line number Diff line number Diff line change
@@ -1,8 +1,8 @@
use {
asynk_strim::stream_fn,
asynk_strim::{Yielder, stream_fn},
axum::{
Router,
response::{Html, IntoResponse, Sse},
response::{Html, IntoResponse, Sse, sse::Event},
routing::get,
},
core::{convert::Infallible, error::Error, time::Duration},
Expand Down Expand Up @@ -49,15 +49,17 @@ pub struct Signals {
}

async fn hello_world(ReadSignals(signals): ReadSignals<Signals>) -> impl IntoResponse {
Sse::new(stream_fn(move |mut yielder| async move {
for i in 0..MESSAGE.len() {
let elements = format!("<div id='message'>{}</div>", &MESSAGE[0..i + 1]);
let patch = PatchElements::new(elements);
let sse_event = patch.write_as_axum_sse_event();
Sse::new(stream_fn(
move |mut yielder: Yielder<Result<Event, Infallible>>| async move {
for i in 0..MESSAGE.len() {
let elements = format!("<div id='message'>{}</div>", &MESSAGE[0..i + 1]);
let patch = PatchElements::new(elements);
let sse_event = patch.write_as_axum_sse_event();

yielder.yield_item(Ok::<_, Infallible>(sse_event)).await;
yielder.yield_item(Ok(sse_event)).await;

tokio::time::sleep(Duration::from_millis(signals.delay)).await;
}
}))
tokio::time::sleep(Duration::from_millis(signals.delay)).await;
}
},
))
}
48 changes: 27 additions & 21 deletions examples/axum-live-reload.rs
View file
Open in desktop
Original file line number Diff line number Diff line change
@@ -1,8 +1,8 @@
use {
asynk_strim::stream_fn,
asynk_strim::{Yielder, stream_fn},
axum::{
Router,
response::{Html, IntoResponse, Sse},
response::{Html, IntoResponse, Sse, sse::Event},
routing::get,
},
core::{convert::Infallible, error::Error, time::Duration},
Expand Down Expand Up @@ -72,17 +72,21 @@ async fn hotreload() -> impl IntoResponse {
// tracking against a date or version stored in a cookie
// or by some other means.

use asynk_strim::Yielder;
use axum::response::sse;
use datastar::prelude::ExecuteScript;
static ONCE: atomic::AtomicBool = atomic::AtomicBool::new(false);

Sse::new(stream_fn(move |mut yielder| async move {
if !ONCE.swap(true, atomic::Ordering::SeqCst) {
let script = ExecuteScript::new("window.location.reload()");
let sse_event = script.write_as_axum_sse_event();
yielder.yield_item(Ok::<_, Infallible>(sse_event)).await;
}
std::future::pending().await
}))
Sse::new(stream_fn(
|mut yielder: Yielder<Result<sse::Event, Infallible>>| async move {
if !ONCE.swap(true, atomic::Ordering::SeqCst) {
let script = ExecuteScript::new("window.location.reload()");
let sse_event = script.write_as_axum_sse_event();
yielder.yield_item(Ok(sse_event)).await;
}
std::future::pending().await
},
))
}

const MESSAGE: &str = "Hello, world!";
Expand All @@ -93,15 +97,17 @@ pub struct Signals {
}

async fn hello_world(ReadSignals(signals): ReadSignals<Signals>) -> impl IntoResponse {
Sse::new(stream_fn(move |mut yielder| async move {
for i in 0..MESSAGE.len() {
let elements = format!("<div id='message'>{}</div>", &MESSAGE[0..i + 1]);
let patch = PatchElements::new(elements);
let sse_event = patch.write_as_axum_sse_event();

yielder.yield_item(Ok::<_, Infallible>(sse_event)).await;

tokio::time::sleep(Duration::from_millis(signals.delay)).await;
}
}))
Sse::new(stream_fn(
move |mut yielder: Yielder<Result<Event, Infallible>>| async move {
for i in 0..MESSAGE.len() {
let elements = format!("<div id='message'>{}</div>", &MESSAGE[0..i + 1]);
let patch = PatchElements::new(elements);
let sse_event = patch.write_as_axum_sse_event();

yielder.yield_item(Ok(sse_event)).await;

tokio::time::sleep(Duration::from_millis(signals.delay)).await;
}
},
))
}
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