mirror of
https://github.com/actix/actix-website
synced 2024-11-28 02:22:57 +01:00
36 lines
1014 B
Rust
36 lines
1014 B
Rust
// <setup_mutable>
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use actix_web::{web, App, HttpServer};
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use std::sync::Mutex;
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struct AppStateWithCounter {
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counter: Mutex<i32>, // <- Mutex is necessary to mutate safely across threads
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}
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async fn index(data: web::Data<AppStateWithCounter>) -> String {
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let mut counter = data.counter.lock().unwrap(); // <- get counter's MutexGuard
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*counter += 1; // <- access counter inside MutexGuard
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format!("Request number: {}", counter) // <- response with count
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}
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// </setup_mutable>
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// <make_app_mutable>
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#[actix_web::main]
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async fn main() -> std::io::Result<()> {
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let counter = web::Data::new(AppStateWithCounter {
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counter: Mutex::new(0),
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});
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HttpServer::new(move || {
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// move counter into the closure
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App::new()
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// Note: using app_data instead of data
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.app_data(counter.clone()) // <- register the created data
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.route("/", web::get().to(index))
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})
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.bind("127.0.0.1:8080")?
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.run()
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.await
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}
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// </make_app_mutable>
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