[−][src]Trait opentelemetry::api::metrics::gauge::Gauge

pub trait Gauge<T, LS>: Instrument<LS> where
    T: Into<MeasurementValue>,
    LS: LabelSet, {
    type Handle: GaugeHandle<T>;
    fn measurement(&self, value: T) -> Measurement<LS>;
    fn acquire_handle(&self, labels: &LS) -> Self::Handle;

    fn set(&self, value: T, label_set: &LS) { ... }
}

An interface for recording values where the metric cannot be expressed as a sum or because the measurement interval is arbitrary.

Associated Types

`type Handle: GaugeHandle<T>`

The handle type for the implementing Gauge.

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Required methods

`fn measurement(&self, value: T) -> Measurement<LS>`

Creates a Measurement object to be used by a Meter when batch recording.

`fn acquire_handle(&self, labels: &LS) -> Self::Handle`

Creates a handle for this gauge. The labels should contain the keys and values for each key specified in the LabelSet.

If the labels do not contain a value for the key specified in the LabelSet, then the missing value will be treated as unspecified.

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Provided methods

`fn set(&self, value: T, label_set: &LS)`

Assigns the passed value to the value of the gauge. The labels should contain the keys and values for each key specified in the LabelSet.

If the labels do not contain a value for the key specified in the LabelSet, then the missing value will be treated as unspecified.

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Implementors

`impl Gauge<f64, HashMap<Cow<'static, str>, Cow<'static, str>, RandomState>> for GaugeVec`[src]

`type Handle = GaugeHandle`

`fn measurement(&self, value: f64) -> Measurement<LabelSet>`[src]

Creates a Measurement object to be used by a Meter when batch recording.

`fn acquire_handle(&self, labels: &LabelSet) -> Self::Handle`[src]

Creates a handle for this instrument.

`impl Gauge<f64, NoopLabelSet> for NoopGauge<f64>`[src]

`type Handle = NoopHandle<f64>`

`fn measurement(&self, value: f64) -> Measurement<NoopLabelSet>`[src]

Returns a no-op Measurement.

`fn acquire_handle(&self, _labels: &NoopLabelSet) -> Self::Handle`[src]

Returns a NoopHandle

`impl Gauge<i64, HashMap<Cow<'static, str>, Cow<'static, str>, RandomState>> for IntGaugeVec`[src]

`type Handle = IntGaugeHandle`

`fn measurement(&self, value: i64) -> Measurement<LabelSet>`[src]

Creates a Measurement object to be used by a Meter when batch recording.

`fn acquire_handle(&self, labels: &LabelSet) -> Self::Handle`[src]

Creates a handle for this instrument.

`impl Gauge<i64, NoopLabelSet> for NoopGauge<i64>`[src]

`type Handle = NoopHandle<i64>`

`fn measurement(&self, value: i64) -> Measurement<NoopLabelSet>`[src]

Returns a no-op Measurement.

`fn acquire_handle(&self, _labels: &NoopLabelSet) -> Self::Handle`[src]

Returns a NoopHandle

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