Struct AppState 

pub struct AppState {
    pub smtp: SmtpTransport,
    pub rate_limiter: Arc<RateLimiter>,
    pub metrics: Arc<Metrics>,
    pub status_store: Arc<dyn StatusStore>,
    /* private fields */
}

Shared application state, cloned into every Axum request via Arc.

config is wrapped in ArcSwap for atomic hot-swap on SIGHUP (RFC 305). All code accesses config via state.config(), which returns a snapshot Arc<AppConfig> valid for the lifetime of one request.

Fields

smtp: SmtpTransport

rate_limiter: Arc<RateLimiter>

metrics: Arc<Metrics>

status_store: Arc<dyn StatusStore>

Submission status store (RFC 086/087).

Implementations

impl AppState

pub fn new(config: AppConfig) -> Arc<Self>

Build application state from a validated config.

pub fn config(&self) -> Arc<AppConfig>

Load a snapshot of the current config.

Returns an Arc<AppConfig> that remains valid even if a concurrent SIGHUP reload replaces the stored config.

pub fn new_with_store( config: AppConfig, store: Arc<dyn StatusStore>, ) -> Arc<Self>

Create an AppState with a pre-built status store (useful for tests and SQLite).

pub fn reload_config(&self, new_config: AppConfig)

Replace the stored config atomically (called on SIGHUP, RFC 305).

SIGHUP-reloadable status fields: ttl_seconds, max_records, cleanup_interval_seconds. Apply SIGHUP reload. Restart-required fields that changed cause a warning and are ignored — only reloadable fields take effect (RFC 811).