Add Channel helper

pubsub.go

@@ -280,6 +280,26 @@ func (c *PubSub) resubscribe() {
 	}
 }
 
+// Channel returns a channel for concurrently receiving messages.
+// The channel is closed with PubSub.
+func (c *PubSub) Channel() <-chan *Message {
+	ch := make(chan *Message, 100)
+	go func() {
+		for {
+			msg, err := c.ReceiveMessage()
+			if err != nil {
+				if err == pool.ErrClosed {
+					break
+				}
+				continue
+			}
+			ch <- msg
+		}
+		close(ch)
+	}()
+	return ch
+}
+
 func remove(ss []string, es ...string) []string {
 	if len(es) == 0 {
 		return ss[:0]