Vaadin Keycloak OAuth2 Integration

Keycloak is an open source identity and access management solution. This article shows how to configure Vaadin and Spring Security to use OAuth2 with Keycloak.

Automate Docker with GitOps & Portainer

GitOps is a branch of DevOps that focuses on using git repositories to manage infrastructure and application code deployments. The main difference between the two is that in[...]

Build Secure Web Apps with Vaadin & Spring Boot

Almost all web application frameworks include their security-relevant functions and provide the respective interfaces to external security solutions. As a Java-based full-stack[...]

Agile Softwarearchitektur

Dieser Artikel zeigt auf, wie agile Softwareentwicklungsteams den wichtigen Aspekt der Softwarearchitektur handhaben und integrieren können.

Level Up Your Vaadin Apps with Vaadin Editable Grid

Vaadin has a fantastic Grid component that also can be made editable. But the configuration of the behavior, especially if you want to use the UI with the keyboard, can be[...]

Beyond Angular and React: Building Web Apps with Vaadin

Single-page web applications have today practically become standard. Angular, React, and Vue.js are the best-known representatives in this category of web frameworks. But would[...]

Vaadin BeanValidationBinder with Custom Resource Bundle

The BeanValidationBinder from Vaadin uses the default message bundle ValidationMessages from Bean Validation for translations. But often one has already a resource bundle with[...]

The Real Value of Microservices

For several years, the microservices architecture has established itself as a quasi-standard and is deployed in many projects. That it is not a catch-all solution is well known.[...]

Deploy Vaadin Application on Heroku

Heroku is a platform as a service (PaaS) that enables developers to build, run, and operate applications entirely in the cloud. I’ve used Heroku for some smaller projects in[...]

Vaadin UI Testing with Playwright

In my Vaadin projects, I usually use Karibu Testing for unit and/or Vaadins TestBench for end-to-end tests. Karibu Testing is an open source testing framework developed by Martin[...]

Connect App Engine to Cloud SQL

How to connect from an application running on Google Cloud App Engine to a PostgreSQL database running in Cloud SQL.

Deploy to Google Cloud App Engine with GitHub Actions

In my previous post, I was explaining how to deploy to Google Cloud. The final missing part was to deploy it automatically with GitHub actions. The authentication will be done[...]