Is there a recommended way to use the Observer pattern in MVP using GWT?

This is how I did it. The Eventbus lets presenters (extending the abstract class Subscriber ) subscribe to events belonging to different modules in my app. Each module corresponds to a component in my system, and each module has an event type, a presenter, a handler, a view and a model.

I achieved something on these lines for our project. I wanted a event-driven mechanism (think of PropertyChangeSupport and PropertyChangeListener of standard jdk lib) which were missing. I believe there is an extension module and decided to go ahead with my own.

You can google it for propertychangesupport gwt and use it or go with my approach.

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