opentelemetry/metrics/instruments/
gauge.rsuse crate::{
metrics::{AsyncInstrument, AsyncInstrumentBuilder, InstrumentBuilder, MetricsError},
KeyValue,
};
use core::fmt;
use std::any::Any;
use std::sync::Arc;
pub trait SyncGauge<T> {
fn record(&self, value: T, attributes: &[KeyValue]);
}
#[derive(Clone)]
pub struct Gauge<T>(Arc<dyn SyncGauge<T> + Send + Sync>);
impl<T> fmt::Debug for Gauge<T>
where
T: fmt::Debug,
{
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
f.write_fmt(format_args!("Gauge<{}>", std::any::type_name::<T>()))
}
}
impl<T> Gauge<T> {
pub fn new(inner: Arc<dyn SyncGauge<T> + Send + Sync>) -> Self {
Gauge(inner)
}
pub fn record(&self, value: T, attributes: &[KeyValue]) {
self.0.record(value, attributes)
}
}
impl TryFrom<InstrumentBuilder<'_, Gauge<u64>>> for Gauge<u64> {
type Error = MetricsError;
fn try_from(builder: InstrumentBuilder<'_, Gauge<u64>>) -> Result<Self, Self::Error> {
builder
.instrument_provider
.u64_gauge(builder.name, builder.description, builder.unit)
}
}
impl TryFrom<InstrumentBuilder<'_, Gauge<f64>>> for Gauge<f64> {
type Error = MetricsError;
fn try_from(builder: InstrumentBuilder<'_, Gauge<f64>>) -> Result<Self, Self::Error> {
builder
.instrument_provider
.f64_gauge(builder.name, builder.description, builder.unit)
}
}
impl TryFrom<InstrumentBuilder<'_, Gauge<i64>>> for Gauge<i64> {
type Error = MetricsError;
fn try_from(builder: InstrumentBuilder<'_, Gauge<i64>>) -> Result<Self, Self::Error> {
builder
.instrument_provider
.i64_gauge(builder.name, builder.description, builder.unit)
}
}
#[derive(Clone)]
pub struct ObservableGauge<T>(Arc<dyn AsyncInstrument<T>>);
impl<T> fmt::Debug for ObservableGauge<T>
where
T: fmt::Debug,
{
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
f.write_fmt(format_args!(
"ObservableGauge<{}>",
std::any::type_name::<T>()
))
}
}
impl<T> ObservableGauge<T> {
pub fn observe(&self, measurement: T, attributes: &[KeyValue]) {
self.0.observe(measurement, attributes)
}
pub fn as_any(&self) -> Arc<dyn Any> {
self.0.as_any()
}
}
impl<M> AsyncInstrument<M> for ObservableGauge<M> {
fn observe(&self, measurement: M, attributes: &[KeyValue]) {
self.observe(measurement, attributes)
}
fn as_any(&self) -> Arc<dyn Any> {
self.0.as_any()
}
}
impl<T> ObservableGauge<T> {
pub fn new(inner: Arc<dyn AsyncInstrument<T>>) -> Self {
ObservableGauge(inner)
}
}
impl TryFrom<AsyncInstrumentBuilder<'_, ObservableGauge<u64>, u64>> for ObservableGauge<u64> {
type Error = MetricsError;
fn try_from(
builder: AsyncInstrumentBuilder<'_, ObservableGauge<u64>, u64>,
) -> Result<Self, Self::Error> {
builder.meter.instrument_provider.u64_observable_gauge(
builder.name,
builder.description,
builder.unit,
builder.callbacks,
)
}
}
impl TryFrom<AsyncInstrumentBuilder<'_, ObservableGauge<f64>, f64>> for ObservableGauge<f64> {
type Error = MetricsError;
fn try_from(
builder: AsyncInstrumentBuilder<'_, ObservableGauge<f64>, f64>,
) -> Result<Self, Self::Error> {
builder.meter.instrument_provider.f64_observable_gauge(
builder.name,
builder.description,
builder.unit,
builder.callbacks,
)
}
}
impl TryFrom<AsyncInstrumentBuilder<'_, ObservableGauge<i64>, i64>> for ObservableGauge<i64> {
type Error = MetricsError;
fn try_from(
builder: AsyncInstrumentBuilder<'_, ObservableGauge<i64>, i64>,
) -> Result<Self, Self::Error> {
builder.meter.instrument_provider.i64_observable_gauge(
builder.name,
builder.description,
builder.unit,
builder.callbacks,
)
}
}