Spring — DWR — Ext JS Chat Application

[GitHub Repository for Code Samples]
https://github.com/sumithpuri/skp-code-marathon-kabootar

I was curious to explore the capabilities of Reverse Ajax. That's when I created this simple chat application using Spring/DWR/Ext JS.

From my experience, I can easily say that DWR is easy to learn and configure, especially when you are planning to integrate with Spring on the application tier. DWR has a powerful API to perform all relevant operations, right from accessing page script sessions to util classes for sending updates to the client.

I used Ext JS for creating the user interface, which renders stunning displays for elements like forms, buttons, etc. Ext JS has a very steep learning curve and each operation requires a lot of configuration and reference. Also, I found that the event handling mechanism, though complete, is very complex to use. I relied on external Javascript coding for handling events. On the upside, the documentation and support are really good for this framework. Despite this, I would instantly recommend the use of Ext JS for large-sized customer-facing web-based applications, especially for the internet. For medium-scale projects or enterprise-based projects, I would think twice.

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