A while back, my Synology NAS 2415+ broke down after 6 years of trusted service. • Diagnosis: faulty motherboard. • Original price: € 980,00. • Motherboard replacement: € 680,00. • Conclusion: not worth repairing. • Solution: time for a serious upgrade. After looking around and…
Sorting XML with Groovy
Manipulating the Order of Elements in a JMeter Response When testing a SOAP webservice, one of the things you want to test is what you’re getting back from the server. Do the elements in the response match the expectations? When testing your backend services with…
Multipart FileUpload – Handling File Upload in JMeter
A while back, I wrote a blog about the breaking changes between JAX-RS 1.1 and JAX-RS 2.0 with regards to multipart fileupload. In it, I discussed a generic solution that both works for JAX-RS 1.1 and JAX-RS 2.0. In this blog I like to take…
Programmeren is kinderspel
Ondanks dat ik bijna altijd programmeer in Java, met een enkel uitstapje naar PHP en wat vingeroefeningen in andere talen, vandaag toch een blog over iets totaal anders. Hoewel… Het is een typische dag in Corona-tijd: ik ben thuis aan het werk voor mijn opdrachtgever…
Journey of a Craftsman
This year Craftsmen celebrates its 5th birthday, and my (professional) coding career turns 20. Pondering about how time flies I find myself sometimes thinking of the ‘good old days’, like a regular old man 😉 After initially coding on a mainframe I got the opportunity…
Welcome *standalone* Eclipse MicroProfile specifications
Introduction to the standalone specifications Almost two years ago I wrote an introduction to the Eclipse MicroProfile specification. You can find these here (part 1) and here (part 2). Now that there are four new specifications available since version 3.3 (we are now at version…
jOOQ and Spring Transactions, without blockage
Recently, I ran into a bug causing corrupt data in an application that our team was maintaining. The application was running stable for several years. What happened? In this blog, I will show what I did to find the cause of the bug, and how…
Distributed load testing with Locust
In recent years, many companies have moved their software applications to the cloud. One of the most important advantages of the cloud is its scalability. Running into performance issues? Just add some more CPU, or memory, or spin up an additional instance of your application….
Fault tolerance: Goodbye Hystrix, Hello Resilience4J!
Working with microservices the most vulnerable and error prone dependencies are dependencies to other services outside your own network. When those services are temporarily unavailable or malfunction it is necessary to take measures to cope with these failing services. Such as avoiding to keep calling…
Multipart FileUpload – breaking changes between JAX-RS 1.1 and JAX-RS 2.0: now what?
For a project, we had to migrate from WebSphere 8.5 with Java EE 6 to Liberty with Java EE 7. With these kinds of migrations, you tend to run into some trouble, where things no longer work as you expect. Now, as a part of…
Game On! Op Devoxx4Kids!
Hou je van gamen? Dan hebben we goed nieuws! Zaterdag 21 maart kun je helemaal los. We hebben drie geweldige challenges voor je. Waarmee je al gamend ook nog eens een leert programmeren! Dus check je agenda, overleg met je ouders, en meld je snel…
Test method naming, the right way
Phil Karlton once said: “There are only two hard things in Computer Science: cache invalidation and naming things.” Absolutely true. Today, most of us are pretty conscious about giving things the right name, like classes, methods, fields and local variables, and naming things correctly is…