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Introduction

1. • 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
   ). The plugins can also be updated dynamically when the author(s
   • )
   make changes
   • .
   • You may have seen plugins in the software that you use, Internet browsers,
   eclipse,
   • 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.

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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