package metrics import ( "bufio" "fmt" "log" "net" "strconv" "strings" "time" ) // GraphiteConfig provides a container with configuration parameters for // the Graphite exporter type GraphiteConfig struct { Addr *net.TCPAddr // Network address to connect to Registry Registry // Registry to be exported FlushInterval time.Duration // Flush interval DurationUnit time.Duration // Time conversion unit for durations Prefix string // Prefix to be prepended to metric names Percentiles []float64 // Percentiles to export from timers and histograms } // Graphite is a blocking exporter function which reports metrics in r // to a graphite server located at addr, flushing them every d duration // and prepending metric names with prefix. func Graphite(r Registry, d time.Duration, prefix string, addr *net.TCPAddr) { GraphiteWithConfig(GraphiteConfig{ Addr: addr, Registry: r, FlushInterval: d, DurationUnit: time.Nanosecond, Prefix: prefix, Percentiles: []float64{0.5, 0.75, 0.95, 0.99, 0.999}, }) } // GraphiteWithConfig is a blocking exporter function just like Graphite, // but it takes a GraphiteConfig instead. func GraphiteWithConfig(c GraphiteConfig) { log.Printf("WARNING: This go-metrics client has been DEPRECATED! It has been moved to https://github.com/cyberdelia/go-metrics-graphite and will be removed from rcrowley/go-metrics on August 12th 2015") for range time.Tick(c.FlushInterval) { if err := graphite(&c); nil != err { log.Println(err) } } } // GraphiteOnce performs a single submission to Graphite, returning a // non-nil error on failed connections. This can be used in a loop // similar to GraphiteWithConfig for custom error handling. func GraphiteOnce(c GraphiteConfig) error { log.Printf("WARNING: This go-metrics client has been DEPRECATED! It has been moved to https://github.com/cyberdelia/go-metrics-graphite and will be removed from rcrowley/go-metrics on August 12th 2015") return graphite(&c) } func graphite(c *GraphiteConfig) error { now := time.Now().Unix() du := float64(c.DurationUnit) conn, err := net.DialTCP("tcp", nil, c.Addr) if nil != err { return err } defer conn.Close() w := bufio.NewWriter(conn) c.Registry.Each(func(name string, i interface{}) { switch metric := i.(type) { case Counter: fmt.Fprintf(w, "%s.%s.count %d %d\n", c.Prefix, name, metric.Snapshot().Count(), now) case CounterFloat64: fmt.Fprintf(w, "%s.%s.count %f %d\n", c.Prefix, name, metric.Snapshot().Count(), now) case Gauge: fmt.Fprintf(w, "%s.%s.value %d %d\n", c.Prefix, name, metric.Snapshot().Value(), now) case GaugeFloat64: fmt.Fprintf(w, "%s.%s.value %f %d\n", c.Prefix, name, metric.Snapshot().Value(), now) case GaugeInfo: fmt.Fprintf(w, "%s.%s.value %s %d\n", c.Prefix, name, metric.Snapshot().Value().String(), now) case Histogram: h := metric.Snapshot() ps := h.Percentiles(c.Percentiles) fmt.Fprintf(w, "%s.%s.count %d %d\n", c.Prefix, name, h.Count(), now) fmt.Fprintf(w, "%s.%s.min %d %d\n", c.Prefix, name, h.Min(), now) fmt.Fprintf(w, "%s.%s.max %d %d\n", c.Prefix, name, h.Max(), now) fmt.Fprintf(w, "%s.%s.mean %.2f %d\n", c.Prefix, name, h.Mean(), now) fmt.Fprintf(w, "%s.%s.std-dev %.2f %d\n", c.Prefix, name, h.StdDev(), now) for psIdx, psKey := range c.Percentiles { key := strings.Replace(strconv.FormatFloat(psKey*100.0, 'f', -1, 64), ".", "", 1) fmt.Fprintf(w, "%s.%s.%s-percentile %.2f %d\n", c.Prefix, name, key, ps[psIdx], now) } case Meter: m := metric.Snapshot() fmt.Fprintf(w, "%s.%s.count %d %d\n", c.Prefix, name, m.Count(), now) fmt.Fprintf(w, "%s.%s.one-minute %.2f %d\n", c.Prefix, name, m.Rate1(), now) fmt.Fprintf(w, "%s.%s.five-minute %.2f %d\n", c.Prefix, name, m.Rate5(), now) fmt.Fprintf(w, "%s.%s.fifteen-minute %.2f %d\n", c.Prefix, name, m.Rate15(), now) fmt.Fprintf(w, "%s.%s.mean %.2f %d\n", c.Prefix, name, m.RateMean(), now) case Timer: t := metric.Snapshot() ps := t.Percentiles(c.Percentiles) fmt.Fprintf(w, "%s.%s.count %d %d\n", c.Prefix, name, t.Count(), now) fmt.Fprintf(w, "%s.%s.min %d %d\n", c.Prefix, name, t.Min()/int64(du), now) fmt.Fprintf(w, "%s.%s.max %d %d\n", c.Prefix, name, t.Max()/int64(du), now) fmt.Fprintf(w, "%s.%s.mean %.2f %d\n", c.Prefix, name, t.Mean()/du, now) fmt.Fprintf(w, "%s.%s.std-dev %.2f %d\n", c.Prefix, name, t.StdDev()/du, now) for psIdx, psKey := range c.Percentiles { key := strings.Replace(strconv.FormatFloat(psKey*100.0, 'f', -1, 64), ".", "", 1) fmt.Fprintf(w, "%s.%s.%s-percentile %.2f %d\n", c.Prefix, name, key, ps[psIdx], now) } fmt.Fprintf(w, "%s.%s.one-minute %.2f %d\n", c.Prefix, name, t.Rate1(), now) fmt.Fprintf(w, "%s.%s.five-minute %.2f %d\n", c.Prefix, name, t.Rate5(), now) fmt.Fprintf(w, "%s.%s.fifteen-minute %.2f %d\n", c.Prefix, name, t.Rate15(), now) fmt.Fprintf(w, "%s.%s.mean-rate %.2f %d\n", c.Prefix, name, t.RateMean(), now) } w.Flush() }) return nil }