105 lines
4.0 KiB
Go
105 lines
4.0 KiB
Go
package metrics
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import (
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"bufio"
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"fmt"
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"log"
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"net"
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"strconv"
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"strings"
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"time"
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)
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// GraphiteConfig provides a container with configuration parameters for
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// the Graphite exporter
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type GraphiteConfig struct {
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Addr *net.TCPAddr // Network address to connect to
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Registry Registry // Registry to be exported
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FlushInterval time.Duration // Flush interval
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DurationUnit time.Duration // Time conversion unit for durations
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Prefix string // Prefix to be prepended to metric names
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Percentiles []float64 // Percentiles to export from timers and histograms
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}
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// Graphite is a blocking exporter function which reports metrics in r
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// to a graphite server located at addr, flushing them every d duration
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// and prepending metric names with prefix.
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func Graphite(r Registry, d time.Duration, prefix string, addr *net.TCPAddr) {
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GraphiteWithConfig(GraphiteConfig{
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Addr: addr,
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Registry: r,
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FlushInterval: d,
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DurationUnit: time.Nanosecond,
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Prefix: prefix,
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Percentiles: []float64{0.5, 0.75, 0.95, 0.99, 0.999},
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})
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}
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// GraphiteWithConfig is a blocking exporter function just like Graphite,
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// but it takes a GraphiteConfig instead.
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func GraphiteWithConfig(c GraphiteConfig) {
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for _ = range time.Tick(c.FlushInterval) {
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if err := graphite(&c); nil != err {
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log.Println(err)
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}
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}
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}
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func graphite(c *GraphiteConfig) error {
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now := time.Now().Unix()
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du := float64(c.DurationUnit)
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conn, err := net.DialTCP("tcp", nil, c.Addr)
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if nil != err {
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return err
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}
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defer conn.Close()
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w := bufio.NewWriter(conn)
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c.Registry.Each(func(name string, i interface{}) {
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switch metric := i.(type) {
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case Counter:
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fmt.Fprintf(w, "%s.%s.count %d %d\n", c.Prefix, name, metric.Count(), now)
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case Gauge:
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fmt.Fprintf(w, "%s.%s.value %d %d\n", c.Prefix, name, metric.Value(), now)
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case GaugeFloat64:
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fmt.Fprintf(w, "%s.%s.value %f %d\n", c.Prefix, name, metric.Value(), now)
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case Histogram:
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h := metric.Snapshot()
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ps := h.Percentiles(c.Percentiles)
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fmt.Fprintf(w, "%s.%s.count %d %d\n", c.Prefix, name, h.Count(), now)
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fmt.Fprintf(w, "%s.%s.min %d %d\n", c.Prefix, name, h.Min(), now)
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fmt.Fprintf(w, "%s.%s.max %d %d\n", c.Prefix, name, h.Max(), now)
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fmt.Fprintf(w, "%s.%s.mean %.2f %d\n", c.Prefix, name, h.Mean(), now)
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fmt.Fprintf(w, "%s.%s.std-dev %.2f %d\n", c.Prefix, name, h.StdDev(), now)
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for psIdx, psKey := range c.Percentiles {
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key := strings.Replace(strconv.FormatFloat(psKey*100.0, 'f', -1, 64), ".", "", 1)
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fmt.Fprintf(w, "%s.%s.%s-percentile %.2f %d\n", c.Prefix, name, key, ps[psIdx], now)
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}
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case Meter:
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m := metric.Snapshot()
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fmt.Fprintf(w, "%s.%s.count %d %d\n", c.Prefix, name, m.Count(), now)
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fmt.Fprintf(w, "%s.%s.one-minute %.2f %d\n", c.Prefix, name, m.Rate1(), now)
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fmt.Fprintf(w, "%s.%s.five-minute %.2f %d\n", c.Prefix, name, m.Rate5(), now)
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fmt.Fprintf(w, "%s.%s.fifteen-minute %.2f %d\n", c.Prefix, name, m.Rate15(), now)
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fmt.Fprintf(w, "%s.%s.mean %.2f %d\n", c.Prefix, name, m.RateMean(), now)
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case Timer:
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t := metric.Snapshot()
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ps := t.Percentiles(c.Percentiles)
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fmt.Fprintf(w, "%s.%s.count %d %d\n", c.Prefix, name, t.Count(), now)
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fmt.Fprintf(w, "%s.%s.min %d %d\n", c.Prefix, name, int64(du)*t.Min(), now)
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fmt.Fprintf(w, "%s.%s.max %d %d\n", c.Prefix, name, int64(du)*t.Max(), now)
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fmt.Fprintf(w, "%s.%s.mean %.2f %d\n", c.Prefix, name, du*t.Mean(), now)
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fmt.Fprintf(w, "%s.%s.std-dev %.2f %d\n", c.Prefix, name, du*t.StdDev(), now)
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for psIdx, psKey := range c.Percentiles {
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key := strings.Replace(strconv.FormatFloat(psKey*100.0, 'f', -1, 64), ".", "", 1)
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fmt.Fprintf(w, "%s.%s.%s-percentile %.2f %d\n", c.Prefix, name, key, ps[psIdx], now)
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}
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fmt.Fprintf(w, "%s.%s.one-minute %.2f %d\n", c.Prefix, name, t.Rate1(), now)
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fmt.Fprintf(w, "%s.%s.five-minute %.2f %d\n", c.Prefix, name, t.Rate5(), now)
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fmt.Fprintf(w, "%s.%s.fifteen-minute %.2f %d\n", c.Prefix, name, t.Rate15(), now)
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fmt.Fprintf(w, "%s.%s.mean-rate %.2f %d\n", c.Prefix, name, t.RateMean(), now)
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}
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w.Flush()
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})
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return nil
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}
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