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 GitOps, the git repository is the source of truth for the deployment state, while in DevOps, it is the application or server configuration files.

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 framework, Vaadin is compatible with the most popular Java security solutions.

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 complicated. In this blog post, I show you how this can be achieved.

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 this client architecture apply to every use case? Or are there alternatives that would better suit themselves and would be less time- and cost-consuming in development?

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 translations for the Vaadin application. So how can we override this resource bundle?

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. But how do microservices influence the lifecycle of an application, and which paradigms are important for other styles of architecture?

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 the past and, it was very easy to use. So why not try to run a Vaadin application on this platform.

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 Vysny and TestBench the commercial UI testing framework based on Selenium. Testing with TestBench/Selenium is often slow and flaky. I encountered non-reproducible problems when running the test. [...]

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 with Workload Identity Federation.

Deploy Vaadin App to Google Cloud App Engine with Java 17

Today I tried to deploy a Vaadin application to Google Cloud App Engine It was not as straightforward as expected so I want to share my findings.

Build Master-Detail App with Hilla

In this post, I’ll explain how to use the web application framework Hilla to create a master-detail view with a Grid to display the data and a Form to edit the data.