DevX.com have an introductory article to using the StAX XML API. Whereas the DOM API loads the entire document into memory and treats it as a tree structure and SAX parses the document one-time on the fly, pushing events to document code when matching nodes are found, StAX takes a different approach, somewhere between both. StAX treats the XML as a stream, and can pull content from the stream on demand, when needed.
Building a Web App with the Tapestry Web Framework
DevX.com have a good introductory article on building a web app using the Tapestry Web Framework.
The article walks you through setting up a simple webapp, defining pages and application logic, and defining events in the web page to methods on Java classes – Tapestry uses an event based model.
The database engine that holds the most relational data in the world, and yet no-one talks about it.
The developer of this database engine claim that more relational data is stored in this database across the world than any other. The largest OLTP database in the world (in terms of data size, is the Land Registry, at 23,101 GB) is also stored using this database (according to the Winter Corporation survey). So is the largest in terms of millions of rows (UPS; 89,621 million).
So what is this database that no-one talks about? The Register’s Developer site has an interesting article laying out these facts and more, and questions why DB2 does not receive more press or advertising from IBM. They suggest that IBM has possibly become complacent and feel that they have no need to advertise or push the product – why should they if they are already the database market leader (in some but not all areas). Seems a dangerous policy to me.
Hibernate 3.1.1 released this week
The Hibernate team released 3.1.1. this week. Release notes on the SourceForge site.
Doesn’t seem to be any major functional changes or additions in this release, the list is a small collection of bug fixes and some improvements.