I am trying to make a multi-user DB application. My question is how do I keep the multiple users' browser view in sync when a user updates the database? I want to avoid polling the server client-side to see if it has been updated. Is there any way the server can push a notification to all the other clients that the database has been updated and that it needs to refresh the data (I refresh will be done via AJAX so I can avoid a hard refresh). My problem: User A logs in and viewing table A. User B logs in and viewing table A. User C logs in and viewing table B. User A updates table A. User B viewing old table A. User C still viewing table B. Solution I want: User A updates table A. User B viewing updated table A. (push notification received and table is updated) User C still viewing table B. (push notification ignored) Any help would be appreciated.
on 2009-01-24 20:10
on 2009-01-25 06:54
Have you looked at Comet? http://en.wikipedia.org/wiki/Comet_(programming) Do a quick search for Comet and Ruby - a few of the results point to Juggernaut, a Rails plugin that implements Comet: 1. http://ajaxian.com/archives/juggernaut-comet-for-rails 2. http://dineshakadinks.blogspot.com/2008/03/comet-r... Good luck. Summarize back what you find if you get a chance. -- Bosco