Add statistics groups

satan.go

@@ -45,8 +45,8 @@ type Publisher interface {
 }
 
 type Statistics interface {
-	Add(daemonName string, dur time.Duration)
+	Add(name string, dur time.Duration)
-	Error(daemonName string)
+	Error(name string)
 }
 
 type task struct {

stats/group.go

@@ -0,0 +1,29 @@
+package stats
+
+import (
+	"time"
+
+	"github.com/localhots/satan"
+)
+
+type Group struct {
+	backends []satan.Statistics
+}
+
+func NewGroup(backends ...satan.Statistics) *Group {
+	return &Group{
+		backends: backends,
+	}
+}
+
+func (g *Group) Add(name string, dur time.Duration) {
+	for _, b := range g.backends {
+		b.Add(name, dur)
+	}
+}
+
+func (g *Group) Error(name string) {
+	for _, b := range g.backends {
+		b.Error(name)
+	}
+}