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.

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.

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.

If you are working with Spring Boot there are several ways to initialize the database.