consul/vendor/github.com/circonus-labs/circonus-gometrics/gauge.go

78 lines
1.7 KiB
Go

package circonusgometrics
// A Gauge is an instantaneous measurement of a value.
//
// Use a gauge to track metrics which increase and decrease (e.g., amount of
// free memory).
import (
"fmt"
)
// Gauge sets a gauge to a value
func (m *CirconusMetrics) Gauge(metric string, val interface{}) {
m.SetGauge(metric, val)
}
// SetGauge sets a gauge to a value
func (m *CirconusMetrics) SetGauge(metric string, val interface{}) {
m.gm.Lock()
defer m.gm.Unlock()
m.gauges[metric] = m.gaugeValString(val)
}
// RemoveGauge removes a gauge
func (m *CirconusMetrics) RemoveGauge(metric string) {
m.gm.Lock()
defer m.gm.Unlock()
delete(m.gauges, metric)
}
// SetGaugeFunc sets a gauge to a function [called at flush interval]
func (m *CirconusMetrics) SetGaugeFunc(metric string, fn func() int64) {
m.gfm.Lock()
defer m.gfm.Unlock()
m.gaugeFuncs[metric] = fn
}
// RemoveGaugeFunc removes a gauge function
func (m *CirconusMetrics) RemoveGaugeFunc(metric string) {
m.gfm.Lock()
defer m.gfm.Unlock()
delete(m.gaugeFuncs, metric)
}
// gaugeValString converts an interface value (of a supported type) to a string
func (m *CirconusMetrics) gaugeValString(val interface{}) string {
vs := ""
switch v := val.(type) {
default:
// ignore it, unsupported type
case int:
vs = fmt.Sprintf("%d", v)
case int8:
vs = fmt.Sprintf("%d", v)
case int16:
vs = fmt.Sprintf("%d", v)
case int32:
vs = fmt.Sprintf("%d", v)
case int64:
vs = fmt.Sprintf("%d", v)
case uint:
vs = fmt.Sprintf("%d", v)
case uint8:
vs = fmt.Sprintf("%d", v)
case uint16:
vs = fmt.Sprintf("%d", v)
case uint32:
vs = fmt.Sprintf("%d", v)
case uint64:
vs = fmt.Sprintf("%d", v)
case float32:
vs = fmt.Sprintf("%f", v)
case float64:
vs = fmt.Sprintf("%f", v)
}
return vs
}