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 }