Struct MetricsLayer 

pub struct MetricsLayer<H> { /* private fields */ }

Tower layer that invokes HttpMetricsHook for request lifecycle metrics.

Route labels come from Self::route when set, then from Axum axum::extract::MatchedPath, and finally "<unknown>".

Implementations

impl<H> MetricsLayer<H>

where H: HttpMetricsHook,

pub fn new(hook: H) -> Self

Creates a metrics layer without a route label.

pub fn route(self, route: impl Into<Cow<'static, str>>) -> Self

Adds a stable route label to emitted metrics.

Prefer route patterns such as "/users/:id" over concrete paths to keep label cardinality bounded.

Trait Implementations

impl<H: Clone> Clone for MetricsLayer<H>

fn clone(&self) -> MetricsLayer<H>

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl<H: Debug> Debug for MetricsLayer<H>

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl<S, H> Layer<S> for MetricsLayer<H>

where H: HttpMetricsHook,

type Service = MetricsService<S, H>

The wrapped service

fn layer(&self, inner: S) -> Self::Service

Wrap the given service with the middleware, returning a new service that has been decorated with the middleware.