Initial Codebase (untested)

internal/stats.go

@@ -0,0 +1,44 @@
+package internal
+
+import (
+	"expvar"
+	"runtime"
+	"time"
+)
+
+// var (
+//   stats *expvar.Map
+// )
+
+// func init() {
+// 	stats = NewStats("stats")
+// }
+
+// TimeVar ...
+type TimeVar struct{ v time.Time }
+
+// Set ...
+func (o *TimeVar) Set(date time.Time) { o.v = date }
+
+// Add ...
+func (o *TimeVar) Add(duration time.Duration) { o.v = o.v.Add(duration) }
+
+// String ...
+func (o *TimeVar) String() string { return o.v.Format(time.RFC3339) }
+
+// NewStats ...
+func NewStats(name string) *expvar.Map {
+	stats := expvar.NewMap(name)
+
+	stats.Set("goroutines", expvar.Func(func() interface{} {
+		return runtime.NumGoroutine()
+	}))
+	stats.Set("cgocall", expvar.Func(func() interface{} {
+		return runtime.NumCgoCall()
+	}))
+	stats.Set("cpus", expvar.Func(func() interface{} {
+		return runtime.NumCPU()
+	}))
+
+	return stats
+}