Web Dynpro - Controllers

Component Controller:

• This is the parent controller for the Web Dynpro component.
• Only one component controller can exist, and it is visible to all other controller types of the Web Dynpro component.
• It handles the functionality of the entire Web Dynpro component.

View Controller:

• The view controller handles the flow-logic of the specific view of which it is a part. 
• There is a single view controller for each view. 
• A view controller is used, for example, to verify a user's input to a field on
  the View Layout.

Window Controller:

• The window controller manages the navigation between the views via plugs.

Custom Controller:

•  The custom controller is optional and is created by the developer. 
• It can be used to add functionality to the Component Controller. 
• You can create multiple custom controllers for a given Component Controller.

Configuration Controller:

• Configuration controller is a special case of the custom controller, which allows for personalization
  functionality. 
• There can only be one of these per Component Controller.

Interface Controller:

• The interface controller is used in conjunction with an interface view, which allows view assemblies to be presented through the generic Web Dynpro Framework and the sharing of a visual interface
  between components, along with context, methods, attributes, and events.