Struct AppState 

#[non_exhaustive]
pub struct AppState {
    pub config: Config,
    pub middlewares: LoadedMiddlewares,
    pub tracer: TraceEmitter,
    /* private fields */
}

Shared state, held once and read by reference from each per-request task via Arc<AppState> — see Server::app_state.

RFC 071: no Clone, deliberately

Before RFC 071, Server::app_state was a plain AppState behind Arc<Mutex<_>>, and service() called .lock().await.clone() once per request — an O(config size) deep clone (rule sets included) on every request, serialised through the lock. Neither half is needed: nothing mutates AppState after startup (see the interior-mutability note on Server::app_state), so a plain Arc shares it, and removing Clone here closes the door on silently reintroducing the per-request deep clone this RFC exists to remove.

Fields (Non-exhaustive)

Non-exhaustive structs could have additional fields added in future. Therefore, non-exhaustive structs cannot be constructed in external crates using the traditional Struct { .. } syntax; cannot be matched against without a wildcard ..; and struct update syntax will not work.

config: Config

middlewares: LoadedMiddlewares

tracer: TraceEmitter

Live match-trace channel. Shared across all request handler tasks.

Implementations

impl AppState

pub fn new( config: Config, middlewares: LoadedMiddlewares, tracer: TraceEmitter, ) -> Self