OSGi Concepts

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The OSGi Alliance - Open Services Gateway initiative - is an open standards organization founded in March 1999 that originally specified and continues to maintain the OSGi standard. OSGi technology seems to be remarkably difficult to those unfamiliar with it.

Definitions:

1. The OSGi technology is a set of specifications that define a dynamic component system for Java.[1]

A software component is a unit of composition that can be developed independently with contractually specified interfaces and explicit context dependencies.[2]

OSGi enables the development of applications from components that could be:

• reusable
• dynamically composed
• hide their implementation
• communicate their dependencies and services

2. Bundle is the name for a component in the OSGi Architecture.

(generic bundle definition - a group of things fastened together for convenient handling[3] )

OSGi Layering