Struct ObservableUpDownCounter

pub struct ObservableUpDownCounter<T>(/* private fields */);

An async instrument that records increasing or decreasing values.

Implementations

impl<T> ObservableUpDownCounter<T>

pub fn new(inner: Arc<dyn AsyncInstrument<T>>) -> Self

Create a new observable up down counter.

pub fn observe(&self, value: T, attributes: &[KeyValue])

Records the increment or decrement to the counter.

It is only valid to call this within a callback. If called outside of the registered callback it should have no effect on the instrument, and an error will be reported via the error handler.

pub fn as_any(&self) -> Arc<dyn Any>

Used for SDKs to downcast instruments in callbacks.

Trait Implementations

impl<T> AsyncInstrument<T> for ObservableUpDownCounter<T>

fn observe(&self, measurement: T, attributes: &[KeyValue])

Observes the state of the instrument.

fn as_any(&self) -> Arc<dyn Any>

Used for SDKs to downcast instruments in callbacks.

impl<T: Clone> Clone for ObservableUpDownCounter<T>

fn clone(&self) -> ObservableUpDownCounter<T>

Returns a copy of the value.

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

Performs copy-assignment from source.

impl<T> Debug for ObservableUpDownCounter<T>

where T: Debug,

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

Formats the value using the given formatter.

impl TryFrom<AsyncInstrumentBuilder<'_, ObservableUpDownCounter<f64>, f64>> for ObservableUpDownCounter<f64>

type Error = MetricsError

The type returned in the event of a conversion error.

fn try_from( builder: AsyncInstrumentBuilder<'_, ObservableUpDownCounter<f64>, f64>, ) -> Result<Self, Self::Error>

Performs the conversion.

impl TryFrom<AsyncInstrumentBuilder<'_, ObservableUpDownCounter<i64>, i64>> for ObservableUpDownCounter<i64>

type Error = MetricsError

The type returned in the event of a conversion error.

fn try_from( builder: AsyncInstrumentBuilder<'_, ObservableUpDownCounter<i64>, i64>, ) -> Result<Self, Self::Error>

Performs the conversion.