46 lines
826 B
Go
46 lines
826 B
Go
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package metrics
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import (
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"time"
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)
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// Increment only metric
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type Counter interface {
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Inc()
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Add(float64) // Only positive
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}
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// Increse and decrese metric
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type Gauge interface {
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Set(float64) // Introduced discontinuity
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Inc()
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Dec()
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Add(float64)
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Sub(float64)
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}
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type Histogram interface {
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Observe(float64) // Adds observation to Histogram
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}
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type Summary interface {
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Observe(float64) // Adds observation to Summary
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}
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// Consult http://godoc.org/github.com/prometheus/client_golang/prometheus#SummaryOpts
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type SummaryOpts struct {
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Objectives map[float64]float64
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MaxAge time.Duration
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AgeBuckets uint32
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BufCap uint32
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}
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type Creator interface {
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Counter() Counter
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Gauge() Gauge
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Histogram(buckets []float64) Histogram
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// opts cannot be nil, use empty summary instance
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Summary(opts SummaryOpts) Summary
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}
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