Latest Posts

Local transaction already has 1 non-XA Resource

While developing a bit of functionality that transferred data from one database to another in my current JEE 6 web application I came upon the exception below. Surprisingly for exceptions from deep within system this one is actually quite informative if you understand what it’s saying: the key is knowing that XA means distributed transaction. Transactions can be […]

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Creating a Connection Pool in GlassFish 3.1

Database connection pools are by far the simplest and quickest way to get a database connection from a JEE application. This article describes how to set up a new connection pool in GlassFish 3.1. Version 3.0.x of GlassFish used configuration screens that were very similar but in a slightly different place in the menu.

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Joomla Modules and Plugins

Joomla has literally thousands of extensions that add various bits of functionality to a Joomla based website. This article covers those Joomla extensions that I find particularly useful or well put together. You can find these and other extensions are the Joomla Extensions site.

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Kubuntu 11.04 Email Package Updates

I’ve just built myself a new ITX based system to use as an integration server (amongst other things) for work. I hit a few bumps along the way so as usual I’ll let you know what they were.

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Swing Look and Feel Choices

Java on the desktop has, for the most part, been a bit of a joke. For years it has suffered from clunky badly supported development and a small range of absolutely awful look and feel options. That seems to be changing slowly but I do wonder if it’s not too little too late. Either way […]

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ReadyNAS Ultra 4 – Rsync over SSH

You might wonder why an article about the ReadyNAS Ultra 4 is filed under the Linux category but there is a very good reason for this. Under the hood the ReadyNAS Ultra range (and the Pro range) are basically just little Debian based machines running Intel Atom x86 processors. This, from my point of view, […]

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JEE 6 and Dates

I’ve been having some problems with dates recently in the application I’m currently working on. I need to be able to specify a date that indicates when a particular piece of information becomes valid. Sounds simple enough, yes? I thought so until I actually came to try and implement it. The problem I faced stemmed […]

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Checkstyle Rule Suppression

I recently started using Sonar to automatically check the quality of the code I write – turns out it’s mostly ok with a few systematically bad points that I will work on improving. One of the problems I faced though was what to do about a barrage of false positives from a small number of […]

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JPA 2 Eager Fetching on a Collection

Quick little JPA 2 issue that I faced today that I’m sure many other people have run into especially when starting out. The problem was and error message such as the one shown below when attempting to display the contents of a Set of other entities in a JSF page

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