Twaattin is a Twitter client meant to showcase Vaadin features step-by-step in the context of Learning Vaadin 7.

• Chapter 4 describes components. Twattin starts in this chapter by setting basic component classes for the application.
• Chapter 5 is about the event-listener model. At this point, Twaattin is updated to add behavior triggered by user actions, in particular a login feature.
• Chapter 6 describes Table components. At this step, Twaattin displays tweets of the logged-in user in such a component.
• Chapter 7 goes through Vaadin advanced features, and more specifically Server Push. Now, Twattin is enhanced with this push ability, so that newer tweets are automatically displayed with no user interaction.
• Chapter 9 tells about custom component building. Twaattin tweet-displaying table is replaced by a tweet-displaying component.