Trait StandaloneMetric

pub trait StandaloneMetric: Metric {
    // Required methods
    fn update<'life0, 'async_trait>(
        &'life0 self,
    ) -> Pin<Box<dyn Future<Output = ()> + Send + 'async_trait>>
       where Self: 'async_trait,
             'life0: 'async_trait;
    fn update_interval(&self) -> Duration;

    // Provided methods
    fn register_and_spawn(
        self,
        registry: &Registry,
    ) -> Result<(), PrometheusError> { ... }
    fn spawn(self) { ... }
}

Standalone metric API.

Metrics of this kind know how to update themselves, so we may just spawn and forget the asynchronous self-update task.

Required Methods

fn update<'life0, 'async_trait>( &'life0 self, ) -> Pin<Box<dyn Future<Output = ()> + Send + 'async_trait>>

where Self: 'async_trait, 'life0: 'async_trait,

Update metric values.

fn update_interval(&self) -> Duration

Metrics update interval.

Provided Methods

fn register_and_spawn(self, registry: &Registry) -> Result<(), PrometheusError>

Register and spawn metric. Metric is only spawned if it is registered for the first time.

fn spawn(self)

Spawn the self update task that will keep update metric value at given intervals.

Dyn Compatibility

This trait is not dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety", so this trait is not object safe.

Implementors

impl StandaloneMetric for FloatJsonValueMetric

impl StandaloneMetric for GlobalMetrics