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org.osgi.framework
public interface: BundleActivator [javadoc | source]

All Known Implementing Classes:
    EmbeddedActivator

Customizes the starting and stopping of a bundle.

BundleActivator is an interface that may be implemented when a bundle is started or stopped. The Framework can create instances of a bundle's BundleActivator as required. If an instance's BundleActivator.start method executes successfully, it is guaranteed that the same instance's BundleActivator.stop method will be called when the bundle is to be stopped. The Framework must not concurrently call a BundleActivator object.

BundleActivator is specified through the Bundle-Activator Manifest header. A bundle can only specify a single BundleActivator in the Manifest file. Fragment bundles must not have a BundleActivator. The form of the Manifest header is:

Bundle-Activator: class-name

where class-name is a fully qualified Java classname.

The specified BundleActivator class must have a public constructor that takes no parameters so that a BundleActivator object can be created by Class.newInstance().

Method from org.osgi.framework.BundleActivator Summary:
start,   stop
Method from org.osgi.framework.BundleActivator Detail:
 public  void start(BundleContext context) throws Exception
    Called when this bundle is started so the Framework can perform the bundle-specific activities necessary to start this bundle. This method can be used to register services or to allocate any resources that this bundle needs.

    This method must complete and return to its caller in a timely manner.

 public  void stop(BundleContext context) throws Exception
    Called when this bundle is stopped so the Framework can perform the bundle-specific activities necessary to stop the bundle. In general, this method should undo the work that the BundleActivator.start method started. There should be no active threads that were started by this bundle when this bundle returns. A stopped bundle must not call any Framework objects.

    This method must complete and return to its caller in a timely manner.