Merge branch 'arikfb-master'

json.go

@@ -0,0 +1,62 @@
+package metrics
+
+import (
+	"encoding/json"
+)
+
+// Output each metric in the given registry periodically using the given
+// logger.  The interval is to be given in seconds.
+func (r StandardRegistry) MarshalJSON() ([]byte, error) {
+	data := make(map[string]map[string]interface{})
+
+	r.Each(func(name string, i interface{}) {
+		values := make(map[string]interface{})
+
+		switch m := i.(type) {
+		case Counter:
+			values["count"] = m.Count()
+		case Gauge:
+			values["value"] = m.Value()
+		case Healthcheck:
+			m.Check()
+			values["error"] = m.Error()
+		case Histogram:
+			ps := m.Percentiles([]float64{0.5, 0.75, 0.95, 0.99, 0.999})
+			values["count"] = m.Count()
+			values["min"] = m.Min()
+			values["max"] = m.Max()
+			values["mean"] = m.Mean()
+			values["stddev"] = m.StdDev()
+			values["median"] = ps[0]
+			values["75%%"] = ps[1]
+			values["95%%"] = ps[2]
+			values["99%%"] = ps[3]
+			values["99.9%%"] = ps[4]
+		case Meter:
+			values["count"] = m.Count()
+			values["1m.rate"] = m.Rate1()
+			values["5m.rate"] = m.Rate5()
+			values["15m.rate"] = m.Rate15()
+			values["mean.rate"] = m.RateMean()
+		case Timer:
+			ps := m.Percentiles([]float64{0.5, 0.75, 0.95, 0.99, 0.999})
+			values["count"] = m.Count()
+			values["min"] = m.Min()
+			values["max"] = m.Max()
+			values["mean"] = m.Mean()
+			values["stddev"] = m.StdDev()
+			values["median"] = ps[0]
+			values["75%%"] = ps[1]
+			values["95%%"] = ps[2]
+			values["99%%"] = ps[3]
+			values["99.9%%"] = ps[4]
+			values["1m.rate"] = m.Rate1()
+			values["5m.rate"] = m.Rate5()
+			values["15m.rate"] = m.Rate15()
+			values["mean.rate"] = m.RateMean()
+		}
+
+		data[name] = values
+	})
+	return json.Marshal(data)
+}