MVP

Model-View-Presenter

To get the most out of my posts in the Model-View-Presenter category here, you’ll want to start with

• Chris Lowe’s excellent GWT MVP example, which utilizes David Peterson’s excellent frameworks
• gwt-presenter and
• gwt-dispatch

The GWT MVP and related concepts I’m most excited about are:

• Each view implements an interface defined in the presenter, which improves code organization and testability.
• The event bus (GWT HandlerManager) allows views, widgets, and services to collaborate in a highly decoupled fashion. The ability to create custom Events and EventHandlers in GWT 1.6+ is extremely powerful.
• The notion of a PlaceRequest as implemented by gwt-presenter simplifies navigation and browser history management.
• The Command pattern as implemented by a dispatcher service in gwt-dispatch cleanly enables features like undo and provides a hook to easily pass a security token and other parameters with every service request.

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