Jean-Francois Arcand works for Ning.com. Previously he has worked for Sun Microsystems where he created Grizzly (NIO Framework) , Atmosphere and was a significant contributor to the GlassFish Application Server. Jean-Francois is a DZone MVB and is not an employee of DZone and has posted 23 posts at DZone. You can read more from them at their website. View Full User Profile

The New Atlassian JIRA Studio Activity Bar is Powered by the Atmosphere Framework

03.15.2010
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Last week Atlassian released their new JIRA Studio, which is a hosted software development suite that supports every role of a high-performing development team throughevery stage of your development process.. One of the new feature is called the Activity Bar and it is powered by Atmosphere!

Atmosphere is hidding inside the  "Recent Issues" window above :-). You can read the official annoucement here and why Atmosphere was choosen instead of Servlet 3.0 or private implementation like Jetty and Grizzly.

Technically, the Activity Bar is using the atmosphere-jersey module as it makes it quite simple to write asynchronous applications: only five annotations to learn: @Suspend, @Resume, @Broadcast, @Schedule and @Cluster. As the name implies, this module build around the powerful Project Jersey and atmosphere-runtime, which is our portable layer on top of all private/non portable asynchronous Java API. The Activity Bar is also using the atmosphere-guice module (an improved version of), which bring the power of Google Guice to Atmosphere. Finally, the Activity Bar is using an API called AtmosphereResourceEventListener, which is extremely useful when writing asynchronous application. Why? Because when you suspend connections, you want to make sure all the resources associated with your connections get cleaned if the remote browser close the connection. Without such API, your application can easily produces OOM as some resources may stay associated with dead connections forever. Always think about that before choosing a Comet framework!

Wow! It has been a pleisure to work with Richard Wallace and his team. Since we are using JIRA @ Ning, I should soon work with my own framework!

For any questions or to download Atmosphere, go to our main site and use our Nabble forum (no subscription needed) or follow the team or myself and tweet your questions there! Or download our latest presentation to get an overview of what the framework is.

From http://weblogs.java.net/blog/jfarcand

Published at DZone with permission of Jean-Francois Arcand, author and DZone MVB.

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