Home » Author Archives: Jakub Nabrdalik

Author Archives: Jakub Nabrdalik

Jakub is a software developer: programmer, architect, analyst, team leader, project manager and coach at TouK. Infected with eXtreme Programming and Software Craftsmanship. Test driving and pair programming web and enterprise applications since 2005 in several languages.

Getting rid of null parameters with a simple spring aspect


What is the most hated and at the same time the most popular exception in the world? I bet it’s the NullPointerException. NullPointerException can mean anything, from simple “ups, I didn’t think that can be null” to hours and days of debugging of third-party libraries (try using Dozer for complicated transformations, I dare you). The funny thing is, it’s trivial ...

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Bash’ing your git deployment


Chuck Norris deploys after every commit. Smart men deploy after every successful build on their Continuous Integration server. Educated men, deploy code directly from their distributed version control systems. I, being neither, had to write my deployment script in bash. We’re using git and while doing so I wanted us to: deploy from working copy, but… make sure that you ...

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Spring MVC for Atom Feeds


How to add feeds (Atom) to your web application with just two classes? How about Spring MVC? Here are my assumptions: you are using Spring framework you have some entity, say “News”, that you want to publish in your feeds your ‘News’ entity has creationDate, title, and shortDescription you have some repository/dao, say ‘NewsRepository’, that will return the news from ...

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Google Guava v07 examples


We have something called Weekly Technology Workshops at TouK, that is, every Friday at 16:00 somebody has a presentation for everyone willing to come. We present stuff we learn and work on at home, but we also have a bulletin board with topics that people would like to listen about. Last week Maciej Próchniak had a talk about Clojure, this ...

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Test Driven Traps, part 2


The Story of a Unit in Unit Tests In the previous part of this article, you could see some bad, though popular, test samples. But I’m not a professional critic (also known as a troll, or a hater), to grumble about without having anything constructive to say. Years of TDD have taught me more than just how bad the things ...

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Test Driven Traps, part 1


Have you ever been in a situation, where a simple change of code, broke a few hundred tests? Have you ever had the idea that tests slow you down, inhibit your creativity, make you afraid to change the code. If you had, it means you’ve entered the Dungeon-of-very-bad-tests, the world of things that should not be. I’ve been there. I’ve ...

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