OSGI basic

General

• describe the unit of modularization in OSGi
• describe the relationship of OSGi bundles to eclipse plugins
• describe OSGi layers and their responsibilities

The manifest

• identify the OSGi bundle meta data descriptor from a list of jar entries
• detect incorrect bundles from a list of jar entries
• From a selection of manifest headers identify the mandatory ones
• be able to tell the default values for the following headers
  • Bundle-Classpath
  • Bundle-ManifestVersion
  • Bundle-Version

Bundle contents

• know how bundles are packaged usually (technically speaking)
• identify legal/illegal contents of a bundle

Common syntax knowledge

• from a list of version-strings identify incorrect ones
• be able to order version-strings
• detect incorrect header syntax

Import/export directives

• show how to use the following directives to extend/enable visibility of java packages:
  • export-package
  • import-package
  • private-package
• find missing import-package for a given (small) bundle
• find redundant import-package for a given (small) bundle
• configure a bundle so that it substitutes a package
• avoid using require-bundle header using import-package
• Show how you can make a given importing package optional

Lifecycle Layer: Bundle States

• Show the difference of the following bundle states: INSTALLED, RESOLVED, ACTIVE
• predict the bundle-identifier after a framework restart
• show how you can execute bundle code directly on bundle startup / stop
• identify the system bundle from a list of bundles
• predict the behaviour if the system bundles shuts down
• show the requirements to start a bundle

Basic API

• from a list of interfaces, determine the one that provides the main lifecycle methods for a bundle
• show how can get the system bundleContext reference
• show how you programmatically shutdown the framework
• identify a valid BundleActivator implementation
• predict the bundle state if an uncatched exception is thrown inside BundleActivator.start() or BundleActivator.stop()
• predict the outcome of calling the following lifecycle-methods on the System Bundle:
  • start
  • stop
  • update
  • uninstall