Merge pull request #392 from spiral/plugin/metricsv2.0.0-alpha18

[RR2] Metrics plugin 2.0

1 files changed, 10 insertions, 0 deletions

diff --git a/util/events.go b/util/events.go
index 9e12c4f7..21ebc29b 100755
--- a/util/events.go
+++ b/util/events.go
@@ -1,5 +1,11 @@
 package util
 
+type EventsHandler interface {
+	NumListeners() int
+	AddListener(listener EventListener)
+	Push(e interface{})
+}
+
 // Event listener listens for the events produced by worker, worker pool or other servce.
 type EventListener func(event interface{})
 
@@ -8,6 +14,10 @@ type EventHandler struct {
 	listeners []EventListener
 }
 
+func NewEventsHandler() EventsHandler {
+	return &EventHandler{listeners: make([]EventListener, 0, 2)}
+}
+
 // NumListeners returns number of event listeners.
 func (eb *EventHandler) NumListeners() int {
 	return len(eb.listeners)