This document discusses how Glassfish can be used for hacking and experimenting. It describes how the author used Glassfish along with Hazelcast and a JMS wrapper to create a demo that implements a JMS broker backed by a Hazelcast data grid. The author notes that Glassfish is hacker friendly due to its modular architecture and Java EE standards. Some areas that could be improved in Glassfish are mentioned, such as providing more descriptive error messages and making the source code available outside of SVN.

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2. Hacking on Glassfish!
Jaromir Hamala, Senior Consultant
(and passionate developer!)
C2B2 Consulting Ltd.

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How You Are Using GlassFish
Hacking!
 Glassfish as the hacker friendly Java EE platform
 Taking advantage of modular architecture
 And Java EE standards!
 It’s fast to start with! (yet very reliable!)
 Low footprint

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What Worked with GlassFish
Did I mention it’s highly hackable? 
 JMS broker or Data Grid?
 JMS backed by Data Grid!
 Demo Time!
https://github.com/jerrinot/hazelcastmq

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Ingredients
 Hazelcast DataGrid (implements topic and queue ootb)
 JMS wrapper (written by Mike Pilone)
https://github.com/mpilone/hazelcastmq
 Generic JMS RA http://genericjmsra.java.net/
 1 Rainy Saturday
– (or pretty much any Sunday if you live in the UK)

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How GlassFish Can Be Better
 Better / More descriptive error messages
 No downloadable tarball with source code
 SVN only
http://www.joe-ks.com/archives_aug2009/CatFish.htm
public class FlushJMSDestination {
[…]
if (!success) {
//todo: enable localized string
throw new Exception();//localStrings.getLocalString("admin.mbeans.rmb.error_purging_jms_dest"));
}

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