Now you are prepared to learn more advanced things. So, in this section, we will see the Wicket core concepts and apply them to the sign-in/sign-out application.
In this section, we will see an overview of the lifecycle in Wicket regarding objects and requests. It is out of the scope of this book to enter in all the details, but, with our explanation, you will understand the basics of the Wicket lifecycle.
It is important to know three kinds of objects and their lifecycles:
Application: An instance of this type lasts for the entire life of an application; in other words, while the application is running. The class that fulfills this role is usually the one that extends
WebApplication, and ...