Struct ObservableCounter

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

An async instrument that records increasing values.

Implementations

impl<T> ObservableCounter<T>

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

Create a new observable counter.

impl<T> ObservableCounter<T>

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

Records an increment 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 ObservableCounter<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 ObservableCounter<T>

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

Returns a copy of the value.

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

Performs copy-assignment from source.

impl<T> Debug for ObservableCounter<T>

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

Formats the value using the given formatter.

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

type Error = MetricsError

The type returned in the event of a conversion error.

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

Performs the conversion.

impl TryFrom<AsyncInstrumentBuilder<'_, ObservableCounter<u64>, u64>> for ObservableCounter<u64>

type Error = MetricsError

The type returned in the event of a conversion error.

fn try_from( builder: AsyncInstrumentBuilder<'_, ObservableCounter<u64>, u64>, ) -> Result<Self, Self::Error>

Performs the conversion.