Open Elements

March 14, 2023

#Java

Every Six Months an Update: The Path to the Java Release Train

In recent years, there have been various changes in the Java Release Train, leading to confusion and misunderstandings within the community. This post will give an overview of the changes and how you can be better prepared for the next Java releases.

February 28, 2023

Hendrik Ebbers

#Java

Write Once, Run Anywhere - how good is Java's Backwards Compatibility?

As programming paradigms and language features continue to evolve, a question arises: Can Java still maintain the always advertised backwards compatibility?

February 7, 2023

Hendrik Ebbers

#Java

Best Practices and Anti-Pattern for Logging in Java and other Languages

Logging is an important instrument, but it's not easy to find the right amount of information to log. This post will show some best pratices that help to get the best results out of a logging system.

February 21, 2020

Hendrik Ebbers

#Java

#AdoptOpenJDK

How AdoptOpenJDK provides enterprise ready OpenJDK builds

With the new licence of the Oracle JDK a lot of companies need to switch to a new JDK vendor. With AdoptOpenJDK we have a community based alternative that provides free LTS JDK builds. In this post I will have a deeper look at the infrastructure of the AdoptOpenJDK and how each build is tested to offer production ready quality.

February 15, 2020

Hendrik Ebbers

#Java

Back to the future - with Java

Each year several Java applications might show wrong date information for the days around New Year's Eve. This post gives an overview about the problem and describes how you can easily avoid such bugs

January 25, 2019

Hendrik Ebbers

#Java

#OpenJDK

How a single request can kill your enterprise

As developers we always try to create bug free and secure applications. Sometimes the most critical issues are not part of our code but of its dependencies. This post shows how security issues in dependencies can be used to create horrible attack scenarios of your systems. I will show one exploit in a simply Java based server application that can be used to do mostly everything with your whole system.

January 9, 2019

Hendrik Ebbers

#Java

#Docker

#Integration Tests

#Tests

#JavaEE

#JakartaEE

Integration tests with Docker

This post gives an overview how we at Karakun use Docker to create integration tests for JavaEE / JakartaEE based libraries and frameworks.