25 lines
797 B
Go
25 lines
797 B
Go
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package metrics
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// Counter describes a metric that accumulates values monotonically.
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// An example of a counter is the number of received HTTP requests.
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type Counter interface {
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With(labelValues ...string) Counter
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Add(delta float64)
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}
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// Gauge describes a metric that takes specific values over time.
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// An example of a gauge is the current depth of a job queue.
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type Gauge interface {
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With(labelValues ...string) Gauge
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Set(value float64)
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}
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// Histogram describes a metric that takes repeated observations of the same
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// kind of thing, and produces a statistical summary of those observations,
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// typically expressed as quantiles or buckets. An example of a histogram is
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// HTTP request latencies.
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type Histogram interface {
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With(labelValues ...string) Histogram
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Observe(value float64)
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}
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