Year 2009 Retrospect

For the past few years of my career I worked mainly on designing and developing J2SE and J2EE enabled enterprise batch solutions and spent some time on database scripting and performance tuning. These years were spent on developing more enterprisy stuff.

The year 2009 was a year of whole and sole open source technologies. It was more about Web Technologies. I did some projects using Flex and Apache Wicket following Scrum methodology. I played around with open source CMS solutions like Magnolia and even Drupal (crazy it may sound but it works)!! As far as knowledge sharing is concerned, I did a tech talk on Esper – CEP Engine and imparted a training on Advanced RDBMS techniques. Also, I did some PoC’ on different libraries. Apart from this I got an opportunity to work with co-developers of Spring Framework and different open source projects at JTeam. All in all it was a good year of learning though not the best.

Esper – Complex Event Processing Engine

Recently I presented a talk about Esper at JTeam Tech Meeting. Please go through the slides if you are interested in understanding more about Complex Event Processing and Esper . The first half of the presentation covers conceptual knowledge of Complex Event Processing, its advantages over traditional approaches and use cases. The second part covers API details of Esper – The Open Source CEP Engine written in Java.

Generating Dynamic PDF Using iText

iText is a library that allows you to generate PDF files on the fly.

In the following blog post I would show how to
1. Create PDF using PDF Template and PDF Form
2. Appending documents