First8 staat voor vakmanschap. Al onze collega’s zijn een groot aanhanger van Open Source en in het bijzonder het Java-platform. Wij zijn gespecialiseerd in het pragmatisch ontwikkelen van bedrijfskritische Java toepassingen waarbij integratie van systemen, hoge eisen aan beveiliging en veel transacties een belangrijke rol spelen. Op deze pagina vind je onze blogs.
SOLID Principle

Cleaning up switch cases with clean code for easy testing

I was reading an article about property-based testing the other day. This article started with the problem that it could be difficult to test all the cases of a function and that this was cumbersome and error prone. This triggered me to think about why such a function would be difficult to test. The switch statement During the years I … Lees verder Cleaning up switch cases with clean code for easy testing

How to start with declarative Jenkins pipelines

So, we have been using pipelines-as-code in Jenkins for a while now and we generally are using scripted pipelines, Groovy scripts that run in Jenkins. Very flexible, but it is missing something for me. While we were used to the webforms of Jenkins before pipelines, these constructs aren’t always available in scripted pipelines. Enter declarative pipelines. These are pipelines-as-code as … Lees verder How to start with declarative Jenkins pipelines

How to reuse pipelines with Jenkins Shared Libraries

As a continuous delivery engineer I really want software teams to work fast and safe, with ease and having fun. Happy teams are productive, learning and innovative teams. Authoring pipelines is an important aspect of a safe and smooth development cycle. Every new piece of code should be tried, tested, reworked and eventually (potentially) promoted for real use. However, there … Lees verder How to reuse pipelines with Jenkins Shared Libraries

Functional Java by Example | Part 8 – More Pure Functions

This is part 8, the last instalment of the series called “Functional Java by Example”. The example I’m evolving in each part of the series is some kind of “feed handler” which processes documents. In the last instalment we’ve seen some pattern matching, using the Vavr library, and treated failures as data too, e.g. take an alternative path and return … Lees verder Functional Java by Example | Part 8 – More Pure Functions

Testing with state using GraphWalker | Part 1 – Persistence

In this first installment of Testing with state using GraphWalker, we’ll look at integration testing the persistence layer of a Spring application. So, our tests will target the database and the data repositories. Statefulness The database itself is inherently stateful. As a result, if we connect a data repository to an actual database, it will also show stateful behavior. For … Lees verder Testing with state using GraphWalker | Part 1 – Persistence

How to solve a support case at Red Hat with success

In this blog post, I will walk you through the process up starting support cases at Red Hat. Including examples of what we did to solve our case. However, these blog posts might still help you when starting support cases at other companies. Our case One of the cases we have started is a case regarding a bug in JBoss … Lees verder How to solve a support case at Red Hat with success

The CDF is here! Why a continuous delivery foundation?

  March 12th 2019 a new vendor neutral foundation was created: the CDF! CDF is founded by Cloudbees and Google. For now the project has Jenkins (including the ‘jenkins-x’ project), Spinnaker (Netflix) and Tekton (kubernetes / google) on board and many companies as founding members. It was announced as definitive at FOSDEM in februari.   Some background on continuous delivery … Lees verder The CDF is here! Why a continuous delivery foundation?