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Mastering Eclipse Plug-in Development

You're reading from   Mastering Eclipse Plug-in Development Build modular applications on Eclipse by defining custom extension points and using OSGi services

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Product type Paperback
Published in Aug 2014
Publisher
ISBN-13 9781783287796
Length 362 pages
Edition 1st Edition
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Authors (2):
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Bandlem Limited Bandlem Limited
Author Profile Icon Bandlem Limited
Bandlem Limited
Alex Blewitt Alex Blewitt
Author Profile Icon Alex Blewitt
Alex Blewitt
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OSGi upgrade strategies


While many open source libraries already natively support OSGi, there are still some that do not have the required metadata added by default. Fortunately, there are a number of strategies that can be used to enable the libraries to be used in OSGi runtimes such as Eclipse, or repositories such as Eclipse Orbit (http://eclipse.org/orbit/) that contain corrected bundles.

Embedding the library directly

If the library is only needed in one bundle, then the most expedient mechanism is to embed the JAR(s) into that bundle. Since all libraries in a bundle share the same classpath, this allows the library to run without being aware of the fact that it is running in an OSGi environment. This can be done by embedding the JAR into the bundle and using a Bundle-ClassPath header that refers to the library:

Bundle-ClassPath: .,lib/example.jar

Note that the dot (.) must be present if the bundle itself contains classes, or to enable other resources to be loaded. This approach works well...

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