Struct MetricsSink 

pub struct MetricsSink { /* private fields */ }

Host-aggregated RED-style metrics (ADR 000009 “metrics are host-aggregated”), derived from the span stream in-process: a sink that tallies rather than retains. Errors are the RunError outcomes (trap / deadline / instantiate / unavailable); short-circuits are counted separately (a filter blocking is not a fault).

Implementations

impl MetricsSink

pub fn new() -> MetricsSink

pub fn snapshot(&self) -> MetricsSnapshot

Trait Implementations

impl Debug for MetricsSink

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

Formats the value using the given formatter.

impl Default for MetricsSink

fn default() -> MetricsSink

Returns the “default value” for a type.

impl TelemetrySink for MetricsSink

fn export(&self, span: &FilterSpan)

fn enabled(&self) -> bool

Whether this sink consumes spans at all. When false, the host skips span construction entirely on the per-request path — build_filter_span allocates (name, attributes, one event per host-log line), which would otherwise be paid per hook call just to be dropped by export. Defaults to true; only a sink that discards everything should override.