Data-Centric Applications with Vaadin 8

Coding authorization using request data

Let's study a strategy to implement authorization outside UI components. Web frameworks can be classified as:

• Component-based frameworks
• Request/response-based frameworks

Vaadin Framework is a component-based framework. It abstracts away the concept of request and response. You don't have to think much about it when developing a Vaadin application, and that's one of the key features of the framework. Thanks to its ability to allow developers to implement a web application by directly using the Java programming language, developers can use any object-oriented technique to implement features such as authorization. In fact, in the previous section, we explored how to do so using simple Java if statements. ...