Our previous article unpacked Bytecode further and discussed ConstantPool, today I’ll go through several resources for working with it now. Java bytecode is the Java Virtual Machine’s (JVM) intermediate representation of Java code. While Java bytecode is not meant to be human-readable, it may be edited and manipulated for several reasons. This article examines the tools and methods used to …

This article shows how to configure Vaadin and Spring Security to use OAuth2 with Keycloak. Keycloak First, we must start Keycloak and configure a realm. The easiest way is to start Keycloak with Docker. Caution: This is just for development purposes. Don’t use the setup in production. docker run -d -p 8180:8080 -e KEYCLOAK_ADMIN=admin -e KEYCLOAK_ADMIN_PASSWORD=admin quay.io/keycloak/keycloak:20.0.1 start-dev Now you …

In this podcast,  we are talking to some of the key people working on different IDEs, Integrated Development Environments. Those are applications that provide tools to computer programmers for software development. An IDE typically consists of at least a source code editor, build automation tools, and a debugger. Let’s learn how these tools evolved, and the challenges they face to …

FOSDEM is around the corner and a group of great speakers is lined up to talk about the OpenJDK and the many different ways in which to make use of it. Each comes from a different part of the OpenJDK ecosystem, with different perspectives, and therefore unique insights into what to expect for this year. Tip—in each expectation/prediction for 2023 …

Again, i.e., following on from good times in 2022 and 2021, we have a really great schedule with inspiring speakers for FOSDEM in Brussels, on Sunday, February 5, providing a place for friends of OpenJDK in the Foojay.io Developer Room. It’s all free and fun and we’re also organizing a get together with drinks and food the evening before, on …

Most Apache Kafka benchmarks appear to test high throughput but not low latency. Kafka was traditionally used for high throughput rather than latency-sensitive messaging, but it does have a low-latency configuration. (Mostly setting linger.ms=0 and reducing buffer sizes). In this configuration, you can get below 1-millisecond latency a good percentage of the time for modest throughputs. Benchmarks tend to focus …

This article is a tutorial that guides you through the process of releasing a Java module with JReleaser to Maven Central and Github Actions. JReleaser is a tool that streamlines the release process for Java projects, allowing developers to quickly and efficiently publish their modules to Maven Central. If you just want to publish your Maven project by hand, then …

In de afgelopen jaren zijn microservices enorm in populariteit gestegen. Veel organisaties gebruiken deze bouwstijl om de beperkingen van grote, monolithische backends te vermijden. Hoewel hier veel over geschreven is, blijven veel bedrijven worstelen met “monolithische frontends”. Auteur: Peter Eigermans In dit artikel zullen we een trend beschrijven die ‘frontend monolieten’ opsplitst in veel kleinere, beter beheersbare stukken. En hoe …

In dit artikel lees je meer over hoe je versiebeheer kunt doen op entiteiten. Het bijhouden van data wijzigen in de breedste zin van het woord. Dit is een van de requirements die een project binnen sluipt met een simpele requirement, zoals de historie moet bewaard worden en later steeds meer uitgebreid moet worden tot aan auditing toe. Als je …

In september 2019 begon ik als Agile Test Coach bij Simacan. Mijn opdracht? “Verbeter de kwaliteit van het testen.” En wie testen er? De ontwikkelaars; er zijn geen medewerkers die de specifieke rol van tester hebben. De complexiteit van regressietesten in een operationele microservices architectuur is één van de uitdagingen die ontwikkelaars tegenkomen bij het testen. Testautomatisering helpt er natuurlijk …