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Introduction

plugins

  • Plugins are software programs that can be dynamically added to existing programs to add / enhance the functionality.
  • They are also called Add-ons or Bundles (the OSGi term).
  • You may have seen plugins in the software that you use, Internet browsers, text/graphics editors, games, etc.
  • Examples include Adobe Flash and Adobe Reader for browsers, and countless Photoshop filters.The java standard for Plugins is OSGi (http://www.osgi.org), this is what IGB (written in java) uses.
  • Users can search for plugins and choose ones that address their needs.
  • The user can add the plugin (download and install) whenever they want.
  • They can remove a plugin if they no longer need it.
  • The plugins can also be updated dynamically when the author(s) make changes.

OSGi

  • The java standard for Plugins is OSGi (http://www.osgi.org), this is what IGB (written in java) uses.

Explain:

  • What is a bundle? Give an example.
  • What is OSGi and how does it work?
    • Explain what an Activator is.
  • Provide references to tutorials developers new to the concept of bundles can read to get familiar with the topic.
  • Explain the concept of extension point.
  • Explain the advantages of bundles, plug-ins. (Ann can write this part after talking more with Michael and Lance.)

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