add queue package

core/queue/util.go

@@ -0,0 +1,12 @@
+package queue
+
+import "strings"
+
+func generateName(pushers []Pusher) string {
+	names := make([]string, len(pushers))
+	for i, pusher := range pushers {
+		names[i] = pusher.Name()
+	}
+
+	return strings.Join(names, ",")
+}