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114 lines
3.4 KiB
Go
114 lines
3.4 KiB
Go
// Copyright 2019 The go-ethereum Authors
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// This file is part of the go-ethereum library.
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//
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// The go-ethereum library is free software: you can redistribute it and/or modify
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// it under the terms of the GNU Lesser General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// The go-ethereum library is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU Lesser General Public License for more details.
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//
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// You should have received a copy of the GNU Lesser General Public License
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// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
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package metrics
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import (
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"bytes"
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"fmt"
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"strconv"
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"github.com/VictoriaMetrics/metrics"
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)
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var (
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typeGaugeTpl = "# TYPE %s gauge\n"
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typeCounterTpl = "# TYPE %s counter\n"
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typeSummaryTpl = "# TYPE %s summary\n"
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keyValueTpl = "%s %v\n\n"
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keyCounterTpl = "%s %v\n"
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keyQuantileTagValueTpl = "%s {quantile=\"%s\"} %v\n"
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)
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// collector is a collection of byte buffers that aggregate Prometheus reports
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// for different metric types.
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type collector struct {
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buff *bytes.Buffer
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}
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// newCollector creates a new Prometheus metric aggregator.
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func newCollector() *collector {
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return &collector{
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buff: &bytes.Buffer{},
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}
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}
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func (c *collector) addCounter(name string, m *metrics.Counter) {
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c.writeCounter(name, m.Get())
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}
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func (c *collector) addGauge(name string, m *metrics.Gauge) {
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c.writeGauge(name, m.Get())
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}
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func (c *collector) addFloatCounter(name string, m *metrics.FloatCounter) {
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c.writeGauge(name, m.Get())
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}
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func (c *collector) addHistogram(name string, m *metrics.Histogram) {
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c.buff.WriteString(fmt.Sprintf(typeSummaryTpl, name))
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c.writeSummarySum(name, fmt.Sprintf("%f", m.GetSum()))
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c.writeSummaryCounter(name, len(m.GetDecimalBuckets()))
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c.buff.WriteRune('\n')
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}
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func (c *collector) addTimer(name string, m *metrics.Summary) {
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pv := m.GetQuantiles()
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ps := m.GetQuantileValues()
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var sum float64 = 0
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c.buff.WriteString(fmt.Sprintf(typeSummaryTpl, name))
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for i := range pv {
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c.writeSummaryPercentile(name, strconv.FormatFloat(pv[i], 'f', -1, 64), ps[i])
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sum += ps[i]
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}
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c.writeSummaryTime(name, fmt.Sprintf("%f", m.GetTime().Seconds()))
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c.writeSummarySum(name, fmt.Sprintf("%f", sum))
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c.writeSummaryCounter(name, len(ps))
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c.buff.WriteRune('\n')
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}
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func (c *collector) writeGauge(name string, value interface{}) {
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//c.buff.WriteString(fmt.Sprintf(typeGaugeTpl, name))
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c.buff.WriteString(fmt.Sprintf(keyValueTpl, name, value))
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}
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func (c *collector) writeCounter(name string, value interface{}) {
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//c.buff.WriteString(fmt.Sprintf(typeCounterTpl, name))
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c.buff.WriteString(fmt.Sprintf(keyValueTpl, name, value))
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}
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func (c *collector) writeSummaryCounter(name string, value interface{}) {
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name = name + "_count"
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c.buff.WriteString(fmt.Sprintf(keyCounterTpl, name, value))
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}
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func (c *collector) writeSummaryPercentile(name, p string, value interface{}) {
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c.buff.WriteString(fmt.Sprintf(keyQuantileTagValueTpl, name, p, value))
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}
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func (c *collector) writeSummarySum(name string, value string) {
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name = name + "_sum"
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c.buff.WriteString(fmt.Sprintf(keyCounterTpl, name, value))
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}
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func (c *collector) writeSummaryTime(name string, value string) {
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name = name + "_time"
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c.buff.WriteString(fmt.Sprintf(keyCounterTpl, name, value))
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}
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