Implement statistics server

stats/server.go

@@ -0,0 +1,39 @@
+package stats
+
+import (
+	"encoding/json"
+	"net/http"
+)
+
+type Server struct {
+	base
+}
+
+func NewServer() *Server {
+	s := &Server{}
+	s.init()
+
+	return s
+}
+
+func (s *Server) ServeHTTP(rw http.ResponseWriter, _ *http.Request) {
+	stats := make(map[string]map[string]interface{})
+	for name, stat := range s.stats {
+		stats[name] = map[string]interface{}{
+			"processed": stat.time.Count(),
+			"errors":    stat.errors.Count(),
+			"min":       float64(stat.time.Min()) / 1000000,
+			"mean":      stat.time.Mean() / 1000000,
+			"95%":       stat.time.Percentile(0.95) / 1000000,
+			"max":       float64(stat.time.Max()) / 1000000,
+			"stddev":    stat.time.StdDev() / 1000000,
+		}
+	}
+
+	encoded, err := json.MarshalIndent(stats, "", "    ")
+	if err != nil {
+		panic(err)
+	}
+
+	rw.Write(encoded)
+}