Struct ContextMetricsSampler 

pub struct ContextMetricsSampler<'a> { /* private fields */ }

Tracks successive context metrics snapshots and computes deltas between them.

Implementations

impl<'a> ContextMetricsSampler<'a>

pub fn new(context: &'a Context) -> Self

pub fn snapshot(&self) -> ContextMetricsSnapshot

pub fn sample(&mut self) -> Option<ContextMetricsDelta>

pub fn sample_snapshot( &mut self, current: ContextMetricsSnapshot, ) -> Option<ContextMetricsDelta>

Computes a delta from a caller-supplied snapshot using its wall-clock captured_at timestamp. This clears the monotonic baseline used by sample() and sample_snapshot_at().

pub fn sample_snapshot_at( &mut self, current: ContextMetricsSnapshot, sampled_at: Instant, ) -> Option<ContextMetricsDelta>

Computes a delta from a caller-supplied snapshot and monotonic capture instant. The first call after sample_snapshot() establishes a new monotonic baseline and returns None.

pub fn reset(&mut self)

pub fn previous(&self) -> Option<&ContextMetricsSnapshot>

pub fn delta(&mut self) -> Option<ContextMetricsDelta>

Convenience alias for sample().

Trait Implementations

impl<'a> Clone for ContextMetricsSampler<'a>

fn clone(&self) -> ContextMetricsSampler<'a>

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl<'a> Debug for ContextMetricsSampler<'a>

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

Formats the value using the given formatter.