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Andreas Schaefer

Andreas Schaefer is a System Architect for J2EE at SeeBeyond Inc. working on the development of advance JCA resource adapters. He is a member of JSR-77 expert group and a former JBoss core developer. Currently he is focusing on AOP frameworks and how they can be used to create the next generation of an application server. These ideas and much more can be found on his personal weblog. Since Andy jr. became his boss in July 2002 he enjoys to be a father as much as he likes to investigate and solve problems with the computer.


schaefa's blog

How to do Conditional Compilation with Java

Posted by schaefa on January 20, 2005 at 4:50 PM PST

These instructions are a way to do conditional compilation with Java like the C/C++ #ifdef. In Java there is no preprocessor and so we need to work around this missing feature. This work around is using Ant's copy and filter feature to create the source with the different code in it.

Ever Heard of Ant2, XDoclet2 or Maven2: Correntions

Posted by schaefa on December 10, 2004 at 12:41 PM PST

I feel obligated to add some corrections to my original email to avoid confusions and distress by the developer of Maven 2 because any open-source developers deserves respect for the time and effort he/she spends on such project help all of us.

Ever Heard of Ant2, XDoclet2 or Maven2

Posted by schaefa on December 9, 2004 at 3:09 PM PST

Lately I was made to look into Maven 2 and started wondering why so many complete rewrites of popular open-source projects never make it. In my view it comes down to the resistance of people to changes which has nothing to do with software development at all.

Sun vs. Does Sun own Java or only the Java(tm) Language

Posted by schaefa on December 1, 2004 at 12:52 PM PST

I do not like legal discussions or disputes because here in the US it is quite often big money against little money and as a single person you are silenced by big corporations' power. I also know that I go on a slippery slope here but I think it is important for all of us to know where and how the name Java can be used and why some 'entities' can use Java in their name and other do not.

Maven: Jump Start

Posted by schaefa on November 30, 2004 at 3:02 PM PST

I started to love Maven not only for its scripting abilities but also for the fact that one could start a simple project in a few minutes which is even faster than to build a project with shell scripts. So if you are in doubt about Java just create a simple Maven project and test it with life code.

Unit Test are at least as important as the Code itself: Part II

Posted by schaefa on November 3, 2004 at 11:35 AM PST

In one of the comments to the original blog about Unit Tests I was told that tests can never be as important as the code itself. I want to use this opportunity to explain a little bit more why I still think that developers should pay way more attention to testing even thought that test code is not delivered and/or sold.

All equals() are not born equal

Posted by schaefa on October 29, 2004 at 2:37 PM PDT

During a discussion with a colleague we started talking about the problems of equals() with inheritance. He mentioned Joshua Bloch's Effective Java book which covers this topic quit well but more or less said that this problem cannot be resolved. This was enough to get me hooked onto this problem and I came up with a solution quite fast.

Proposal to fix the Cloneable Problem

Posted by schaefa on October 13, 2004 at 9:02 AM PDT

I know that probably backward compatibility is the main reason to keep java.lang.Cloneable as it is. Nevertheless as I hopefully showed in my rant about this still unresolved issue this shortcoming of the Cloneable interface is still haunting us.

Cloneable: How an old Bug can bite for a very long time

Posted by schaefa on October 12, 2004 at 5:15 PM PDT

I cannot remember when I complained about the missing public Object clone() method in the java.lang.Cloneable interface for the first time but in the latest release of Java (1.5) this bug hurts us developers even more.

Unit Test are at least as Important as the Coding Itself

Posted by schaefa on October 12, 2004 at 2:08 PM PDT

Tom talked in The Problem with Unit Testing about Unit testing. Even though that I agree with most of it I disagree with the view that Unit Testing is only a safety net. The only person responsible of the quality of the software is the author himself and he/she should be held accountable for that.