About me

I’m a Dutch JEE senior consultant/architect at the architecture department of Xebia and I have roughly 9 years of Java/JEE experience.

Interests
My interests are concurrency control, distributed computing, enterprise/software architecture. I don’t care much about classic middleware, but I do care about interesting applications. Especially ones that process large amounts of data, batch processing and distributed/scalable applications. I’m also very interested in software quality/refactoring/patterns and language design.

Spring
To keep my Spring/JEE/Concurrency knowledge up to date I also am a participant at the Spring forum under the name alarmnummer where I try to answer questions where possible (mostly regarding concurrency, databases/transactions and aop).

Open Source Software
I’m working on the following projects:

1. Multiverse: Java based software transactional memory that uses Multi Version Concurrency Control.
2. Prometheus: a concurrency library that extends the JSR-166
3. Concurrency detector: a Java agent that uses runtime analysis to detect which objects/classes/fields are shared by multiple threads. It is a good tool to understand concurrency in a unknown codebase

Presentations

1. November 2008 – J-Fall (Dutch Java Conference) – Java Memory Model
2. April 2009 – J-Spring (Dutch Java Conference) – Software Transactional Memory

And once a month I try to give a presentation at one of our knowledge exchange evenings and in most cases they are about hard core problems like concurrency control in Java/Databases.