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nospam@example.com (Jettro Coenradie) — Sat, 19 Jan 2008 20:58:56 +0100

Welcome to the last entry of this blog. No I am not quitting, I am just moving. I just installed a new blog software framework. I was starting to dislike the way to interact and I wanted something that contained more out of the box. I am in the middle of moving to wordpress software. There is a very good reason to do this. I had found a great tool on the mac called MarsEdit. And again this could not be used with serendipity. I hope I did make a good choice. Since there is a lot of information in the old blog, I did not take this blog offline. It will stay to exist, but I will not make changes there anymore.

I hope to see you at the new version of the blog (check the page at http://www.gridshore.nl). You can attach you feedreader to the following url: feed://www.gridshore.nl/feed/

NLJUG, the dutch java user group

nospam@example.com (Jettro Coenradie) — Wed, 16 May 2007 20:45:03 +0200

We did it, Allard and I have been choosen to give a presentation at the NLJUG JSpring the 13th of June 2007. We are going to give a presentation about Webservice versioning using osgi.

A lot of companies are using or starting to use webservices and/or a Service Oriented Architecture. For each of these companies there comes a time to think about backwards compatibility and versioning. The solution is not always obvious. There are multiple options, we will discuss some of them and explain the concerns we have with them at our current projects. Our presentation deals mostly with a solution based on apache axis and the eclipse equinox implementation of the OSGi framework. The presentation uses a case of a congress registration system for demonstrating the problem of a plain webservice project. We will present our osgi based solution to the versioning problem. In a demo, we show that we can solve the versioning problem within one deployment with one ear/war file. Even better, we can do it at runtime, so no need to redeploy, no downtime. We can do an upgrade and roll it back without one second downtime. At the end of the presentation you will have basic understanding of osgi concepts. You will have the ambition to try it out yourself, that is when you take out your notes, go to our website and download all our material. This is when the real fun part starts.

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NLJUG, the dutch java user group