JAVA FAQS

–     3 Main Roles:

•      Model

•      Encapsulates application state

•      Responds to state queries

•      Exposes application

•      Notifies Views of changes

»    EJB Entity Beans

»    Command Beans (Websphere)

•      View

•      Renders the models

•    Requests updates from the Models

•      Sends user gestures to the Controller

•      Allows the Controller to select the View

»    JSPs

»    Servlets

»    JavaBeans

•      Controller

•      Defines application behavior

•      Maps user actions to Model updates

•      Selects View for response

•    One for each functionality