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Mastering Eclipse Plug-in Development by Dr. Alex Blewitt

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Design patterns

A design pattern is a reusable element of software architecture that can be applied to different situations. This section presents the two most common OSGi-specific patterns: whiteboard and extender.

The whiteboard pattern

The OSGi whiteboard pattern is one in which updates are communicated by bundles to a central location. This approach can be compared to that of a shared whiteboard where someone updates an entry on the whiteboard and others can come and have a look at it, without needing any direct connection or coupling between them, as illustrated in the following diagram:

The whiteboard pattern

Provided that the individual has a reference to the shared ...

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