Struct DurationGuard 

pub struct DurationGuard { /* private fields */ }

On Drop, records the elapsed time since construction into the named histogram with the supplied labels. Recording on drop guarantees a sample even if the surrounding future is cancelled or panics.

Implementations

impl DurationGuard

pub fn new(name: impl Into<KeyName>, labels: Vec<Label>) -> Self

pub fn disarm(&mut self)

Disarm the guard so dropping it records nothing. Used when the timed span turns out not to represent real work — e.g. the terminal empty poll at the end of a source page stream, which would otherwise record a spurious ~0 sample into the page-duration histogram.

pub fn with_connector( name: impl Into<KeyName>, pipeline: SharedString, row: SharedString, connector: SharedString, ) -> Self

Build the canonical (name, pipeline, row, connector) label trio.

Trait Implementations

impl Drop for DurationGuard

fn drop(&mut self)

Executes the destructor for this type.

fn pin_drop(self: Pin<&mut Self>)

🔬This is a nightly-only experimental API. (pin_ergonomics)

Execute the destructor for this type, but different to Drop::drop, it requires self to be pinned.