Google Push Notification
The Google APIs provides push notification that let you watch for changes to resources
Google Drive Push Notification
- https://www.youtube.com/watch?v=r3g_oT03nmQ (Google Drive SDK: Push notifications - YouTube)
- https://github.com/googledrive/pushnotifications-playground (googledrive/pushnotifications-playground)
Google APIs provides Push NotificationYou can visit Google APIs Explorer - search watch. There are few APIs support push notification now. Not all of them.