Update realtime functionality

main.go

@@ -45,6 +45,16 @@ func main() {
 	listener.Collections = []string{COLLECTION_NAME}
 	listener.initialize()
 
-	log.Printf("zzz...\n")
+	for {
+		select {
+		case event := <-listener.Create:
+			log.Printf("Create event: %+v\n", event)
+		case event := <-listener.Update:
+			log.Printf("Update event: %+v\n", event)
+		case event := <-listener.Delete:
+			log.Printf("Delete event: %+v\n", event)
+		}
+	}
+
 	time.Sleep(1 * time.Hour)
 }