Reverse AJAX
Getahead’s DWR (Direct Web Remoting) is a javascript framework that enables Ajax with j2ee applications. Recently etahead launched a new use of AJAX called reverse AJAX. In reverse AJAX the response is a push from the server to the clients rather than the traditional pull. The server code pushes the javascript to the clients who are connected to the server. Read this article from Ajaxian on uses of reverse Ajax.
