The framework architecture
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Ajax

AJAX = Asynchronous JavaScript and XML.

AJAX is a technique for creating fast and dynamic web pages.

AJAX allows web pages to be updated asynchronously by exchanging small amounts of data with the server behind the scenes. This means that it is possible to update parts of a web page, without reloading the whole page.

Classic web pages, (which do not use AJAX) must reload the entire page if the content should change.

Examples of applications using AJAX: Google Maps, Gmail, Youtube, and Facebook tabs.

Mortar Project use Ajax tools like:

DWR

DWR is Easy Ajax for Java. It allows you to easily expose Java objects (including Spring beans) as JavaScript objects. It’s one of the best available libraries for Ajax development. To learn more about DWR and how it works, see Developing AJAX Applications the Easy Way by Joe Walker.

 


Ext JS (pronounced E-X-T-J-S) is a JavaScript library for building interactive web applications using techniques such as AjaxDHTML and DOM scripting.

Originally built as an add-on library extension of YUI by Jack Slocum, Ext JS includes interoperability with jQuery and Prototype. Beginning with version 1.1, Ext JS retains no dependencies on external libraries, instead making their use optional.

To learn more about ExtJs and how it works, see ExtJs Documentation by Sencha.