130 lines
2.9 KiB
Go
130 lines
2.9 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] = val
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}
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// AddGauge adds value to existing gauge
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func (m *CirconusMetrics) AddGauge(metric string, val interface{}) {
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m.gm.Lock()
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defer m.gm.Unlock()
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v, ok := m.gauges[metric]
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if !ok {
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m.gauges[metric] = val
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return
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}
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switch 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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m.gauges[metric] = v.(int) + val.(int)
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case int8:
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m.gauges[metric] = v.(int8) + val.(int8)
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case int16:
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m.gauges[metric] = v.(int16) + val.(int16)
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case int32:
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m.gauges[metric] = v.(int32) + val.(int32)
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case int64:
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m.gauges[metric] = v.(int64) + val.(int64)
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case uint:
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m.gauges[metric] = v.(uint) + val.(uint)
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case uint8:
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m.gauges[metric] = v.(uint8) + val.(uint8)
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case uint16:
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m.gauges[metric] = v.(uint16) + val.(uint16)
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case uint32:
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m.gauges[metric] = v.(uint32) + val.(uint32)
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case uint64:
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m.gauges[metric] = v.(uint64) + val.(uint64)
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case float32:
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m.gauges[metric] = v.(float32) + val.(float32)
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case float64:
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m.gauges[metric] = v.(float64) + val.(float64)
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}
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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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// GetGaugeTest returns the current value for a gauge. (note: it is a function specifically for "testing", disable automatic submission during testing.)
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func (m *CirconusMetrics) GetGaugeTest(metric string) (interface{}, error) {
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m.gm.Lock()
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defer m.gm.Unlock()
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if val, ok := m.gauges[metric]; ok {
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return val, nil
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}
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return nil, fmt.Errorf("Gauge metric '%s' not found", 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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// getGaugeType returns accurate resmon type for underlying type of gauge value
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func (m *CirconusMetrics) getGaugeType(v interface{}) string {
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mt := "n"
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switch v.(type) {
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case int:
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mt = "i"
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case int8:
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mt = "i"
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case int16:
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mt = "i"
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case int32:
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mt = "i"
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case uint:
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mt = "I"
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case uint8:
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mt = "I"
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case uint16:
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mt = "I"
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case uint32:
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mt = "I"
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case int64:
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mt = "l"
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case uint64:
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mt = "L"
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}
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return mt
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}
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