In preparation for a potential customer project, I had to refresh my knowledge of Angular. The best way to do that is to create a small demo application. I used Angular 15 with Spring Boot 3 and JWT to secure the REST API. Often an authorization server like Keycloak is used for authorization and token generation. However, I tried to keep the example as simple as possible and generate the JWT as part of the application.

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

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.

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.

When using a database the question is how to manage the versions of the schema and how to use the database in testing. Container technologies became a defacto standard. Why not use containers for development and your database?

Analyzing and visualizing the message flow between business functions was the goal of my current project. At first, we considered using a UML tool for this job, but we came to the conclusion that it might not be as flexible as we need it to be. Finally, I’ve got the assignment to create a custom web application.

Have you ever had to write an application that didn’t do much other than display and change data? And did you use a Single Page Application framework like Angular, a REST API, and Hibernate?

The new Java version 16 includes a new feature: Records

When using grids, trees, or any other of the multi-valued component with Vaadin you often want to display data from a database table, and typically you have more than a few rows in the database.
In this case loading, thousands or even millions of records don’t make sense and would be a huge performance problem.

No matter if you are using frameworks like JPA, MyBatis or Spring Data JDBC you always end up declaring the SQL statements as a Java String.