82 lines
1.9 KiB
Go
82 lines
1.9 KiB
Go
// Copyright 2016 Circonus, Inc. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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package circonusgometrics
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// A Gauge is an instantaneous measurement of a value.
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//
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// Use a gauge to track metrics which increase and decrease (e.g., amount of
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// free memory).
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import (
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"fmt"
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)
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// Gauge sets a gauge to a value
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func (m *CirconusMetrics) Gauge(metric string, val interface{}) {
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m.SetGauge(metric, val)
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}
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// SetGauge sets a gauge to a value
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func (m *CirconusMetrics) SetGauge(metric string, val interface{}) {
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m.gm.Lock()
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defer m.gm.Unlock()
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m.gauges[metric] = m.gaugeValString(val)
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}
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// RemoveGauge removes a gauge
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func (m *CirconusMetrics) RemoveGauge(metric string) {
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m.gm.Lock()
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defer m.gm.Unlock()
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delete(m.gauges, metric)
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}
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// SetGaugeFunc sets a gauge to a function [called at flush interval]
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func (m *CirconusMetrics) SetGaugeFunc(metric string, fn func() int64) {
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m.gfm.Lock()
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defer m.gfm.Unlock()
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m.gaugeFuncs[metric] = fn
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}
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// RemoveGaugeFunc removes a gauge function
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func (m *CirconusMetrics) RemoveGaugeFunc(metric string) {
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m.gfm.Lock()
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defer m.gfm.Unlock()
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delete(m.gaugeFuncs, metric)
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}
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// gaugeValString converts an interface value (of a supported type) to a string
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func (m *CirconusMetrics) gaugeValString(val interface{}) string {
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vs := ""
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switch v := val.(type) {
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default:
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// ignore it, unsupported type
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case int:
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vs = fmt.Sprintf("%d", v)
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case int8:
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vs = fmt.Sprintf("%d", v)
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case int16:
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vs = fmt.Sprintf("%d", v)
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case int32:
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vs = fmt.Sprintf("%d", v)
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case int64:
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vs = fmt.Sprintf("%d", v)
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case uint:
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vs = fmt.Sprintf("%d", v)
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case uint8:
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vs = fmt.Sprintf("%d", v)
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case uint16:
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vs = fmt.Sprintf("%d", v)
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case uint32:
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vs = fmt.Sprintf("%d", v)
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case uint64:
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vs = fmt.Sprintf("%d", v)
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case float32:
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vs = fmt.Sprintf("%f", v)
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case float64:
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vs = fmt.Sprintf("%f", v)
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}
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return vs
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}
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