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Backbase 4 RIA Development by Sergey Ilinsky, Ghica van Emde Boas

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Broadcaster/observer

In the previous chapter, about data binding, we introduced the observer pattern. Data binding is a rather specific use of the observer pattern, where changes to the data made by one observer are notified to other observers so that they are able to update their views. Here, we are looking at a more generic implementation of this pattern.

Observer is a design pattern associated with broadcasting changes in state of a single object (commonly referred to as the broadcaster) to one or more observers. In a web application, the state of an object can be defined by the values of its attributes. Indeed, for a Backbase application, the pattern determines how changes to any of the attributes of a broadcasting element are propagated to ...

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