prometheus::Info Class Reference

A info metric to represent textual information which should not change during process lifetime. More...

Public Member Functions
	Info ()=default
	Create a info.
ClientMetric	Collect () const
	Get the current value of the info. More...

Static Public Attributes
static const MetricType	metric_type {MetricType::Info}

Detailed Description

A info metric to represent textual information which should not change during process lifetime.

This class represents the metric type info: https://github.com/OpenObservability/OpenMetrics/blob/98ae26c87b1c3bcf937909a880b32c8be643cc9b/specification/OpenMetrics.md#info Prometheus does not provide this type directly, it is used by emulating a gauge with value 1: https://prometheus.io/docs/concepts/metric_types/#gauge

The value of the info cannot change. Example of infos are:

• the application's version
• revision control commit
• version of the compiler

The class is thread-safe. No concurrent call to any API of this type causes a data race.

Member Function Documentation

Collect()

ClientMetric prometheus::Info::Collect

(

)

const

Get the current value of the info.

Collect is called by the Registry when collecting metrics.