Struct MetricsHandle 

pub struct MetricsHandle { /* private fields */ }

Handle to the installed exporter. Cheap to clone.

Implementations

impl MetricsHandle

pub fn render(&self) -> String

Render the current exposition-format snapshot (empty for the no-op exporter).

pub fn render_fn(&self) -> Arc<dyn Fn() -> String + Send + Sync>

The render function seam handed to the admin server.

pub fn exports(&self) -> bool

Whether this handle renders an exposition. False for the no-op exporter and for the detached handle a foreign recorder leaves behind.

The admin server serves /metrics only when it does, so a scrape of a pipeline exporting nothing is a 404 rather than an empty success.

pub fn upkeep_tick(&self)

One maintenance tick: drains histogram state and refreshes process metrics. Cheap; call on an interval.

pub fn spawn_upkeep(&self, period: Duration) -> JoinHandle<()>

Spawn the periodic upkeep task on the current tokio runtime.

Trait Implementations

impl Clone for MetricsHandle

fn clone(&self) -> MetricsHandle

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for MetricsHandle

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

Formats the value using the given formatter.