Trait AsyncInstrument

pub trait AsyncInstrument<T>: Send + Sync {
    // Required methods
    fn observe(&self, measurement: T, attributes: &[KeyValue]);
    fn as_any(&self) -> Arc<dyn Any>;
}

An SDK implemented instrument that records measurements via callback.

Required Methods

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

Observes the state of the instrument.

It is only valid to call this within a callback.

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

Used for SDKs to downcast instruments in callbacks.

Implementors

impl<M> AsyncInstrument<M> for ObservableGauge<M>

impl<T> AsyncInstrument<T> for NoopAsyncInstrument

impl<T> AsyncInstrument<T> for ObservableCounter<T>

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