osgi and equinox-阅读笔记

The system bundle is a special bundle that represents the OSGi framework itself, from within that framework. It has the following roles:

• Exports packages from the JRE (excluding java.*), for example javax.swing, org.w3c.com etc.
• Exports the OSGi framework packages such as org.osgi.framework.
• Stopping the system bundle has the effect of shutting down the OSGi framework.
• Updating the system bundle has the effect of restarting the OSGi framework (requires support from the launcher).

The system bundle always has a bundle id of 0 (zero), so in code we can safely obtain a reference to it as follows:

Bundle systemBundle = context.getBundle(0);