About Jakub Holy

Jakub is an experienced Java[EE] developer working for a lean & agile consultancy in Norway. He is interested in code quality, developer productivity, testing, and in how to make projects succeed.

List/Grid Author Archives Subscribe to the RSS feed of Jakub Holy

devops-logo

Frustration-Driven Development – Towards DevOps, Lean, Clojure

My wife has mentioned that she likes my passion for doing things right in software development. That made me thinking, why do I actually care so much and do not just enjoy the coding itself? It boils down to that I am not happy un ...
devops-logo

The Risks Of Big-Bang Deployments And Techniques For Step-wise Deployment

If you ever need to persuade management why it might be better to deploy a larger change in multiple stages and push it to customers gradually, read on. A deployment of many changes is risky. We want therefore to deploy them in a ...
jboss-resteasy-logo

JBoss Modules Suck, It’s Impossible To Use Custom Resteasy/JAX-RS Under JBoss 7

Since JBoss EAP 6.1 / AS 7.2.0 is modular and you can exclude what modules are visible to your webapp, you would expect it to be easy to ignore the built-in implementation of JAX-RS (Rest Easy 2.3.6) and use a custom one (3.0.6). ...
scala-logo

Surfacing Hidden Design: Seeking A Better Alternative To Interrelated Mutable Fields

What is better, a bunch of mutable boolean fields and methods operating on them, or an explicit expression of the individual states and transitions between them? Lets study an example from a simulation of the progression of a mult ...
java-logo

Simplicity vs. Robustness – Demonstrated On Lock File Handling

Today we will discuss a conflict between the design values of keeping things simple, stupid (KISS) and robustness, between underdesign and overdesign. We were writing a batch Java application and needed to ensure that at maximum o ...
datomic-logo

Making Sense Out of Datomic, The Revolutionary Non-NoSQL Database

I have finally managed to understand one of the most unusual databases of today, Datomic, and would like to share it with you. Thanks to Stuart Halloway and his workshop! Why? Why?!? As we shall see shortly, Datomic is very differ ...
software-development-2-logo

Simple vs. Easy: Writing A Generic Code To Avoid Duplication (Representation of Data To Import)

In our batch jobs for data import we had many similar classes for holding the data being imported. Technically they are all different, with different fields, yet conceptually they are all same. I find this conceptual duplication d ...
software-development-2-logo

Bad Code: Too Many Object Conversions Between Application Layers And How to Avoid Them

Have you ever worked with an application where you had to copy data from one object to another and another and so on before you actually could do something with it? Have you ever written code to convert data from XML to a DTO to a ...
apache-maven-logo

Accessing An Artifact’s Maven And SCM Versions At Runtime

You can easily tell Maven to include the version of the artifact and its Git/SVN/… revision in the JAR manifest file and then access that information at runtime via getClass().getPackage.getImplementationVersion(). (All credit g ...
software-development-2-logo

The Sprinting Centipede Strategy: How to Improve Software Without Breaking It

Our code has been broken for weeks. Compiler errors, failing tests, incorrect behavior plagued our team. Why? Because we have been struck by a Blind Frog Leap. By doing multiple concurrent changes to a key component in the hope of ...
Java Code Geeks and all content copyright © 2010-2014, Exelixis Media Ltd | Terms of Use
All trademarks and registered trademarks appearing on Java Code Geeks are the property of their respective owners.
Java is a trademark or registered trademark of Oracle Corporation in the United States and other countries.
Java Code Geeks is not connected to Oracle Corporation and is not sponsored by Oracle Corporation.

Sign up for our Newsletter

15,153 insiders are already enjoying weekly updates and complimentary whitepapers! Join them now to gain exclusive access to the latest news in the Java world, as well as insights about Android, Scala, Groovy and other related technologies.

As an extra bonus, by joining you will get our brand new e-books, published by Java Code Geeks and their JCG partners for your reading pleasure! Enter your info and stay on top of things,

  • Fresh trends
  • Cases and examples
  • Research and insights
  • Two complimentary e-books
Get tutored by the Geeks! JCG Academy is a fact... Join Now
Hello. Add your message here.