org.osgi.util.tracker.ServiceTrackerCustomizer Interface Reference

Inheritance diagram for org.osgi.util.tracker.ServiceTrackerCustomizer:

org.osgi.util.tracker.ServiceTracker

List of all members.


Detailed Description

The ServiceTrackerCustomizer interface allows a ServiceTracker object to customize the service objects that are tracked.

The ServiceTrackerCustomizer object is called when a service is being added to the ServiceTracker object. The ServiceTrackerCustomizer can then return an object for the tracked service. The ServiceTrackerCustomizer object is also called when a tracked service is modified or has been removed from the ServiceTracker object.

The methods in this interface may be called as the result of a ServiceEvent being received by a ServiceTracker object. Since ServiceEvent s are synchronously delivered by the Framework, it is highly recommended that implementations of these methods do not register (BundleContext.registerService), modify ( ServiceRegistration.setProperties) or unregister ( ServiceRegistration.unregister) a service while being synchronized on any object.

Version:
Revision
1.10

Definition at line 45 of file ServiceTrackerCustomizer.java.


Public Member Functions

Object addingService (ServiceReference reference)
 A service is being added to the ServiceTracker object.
void modifiedService (ServiceReference reference, Object service)
 A service tracked by the ServiceTracker object has been modified.
void removedService (ServiceReference reference, Object service)
 A service tracked by the ServiceTracker object has been removed.

Member Function Documentation

Object org.osgi.util.tracker.ServiceTrackerCustomizer.addingService ( ServiceReference  reference  ) 

A service is being added to the ServiceTracker object.

This method is called before a service which matched the search parameters of the ServiceTracker object is added to it. This method should return the service object to be tracked for this ServiceReference object. The returned service object is stored in the ServiceTracker object and is available from the getService and getServices methods.

Parameters:
reference Reference to service being added to the ServiceTracker object.
Returns:
The service object to be tracked for the ServiceReference object or null if the ServiceReference object should not be tracked.

Implemented in org.osgi.util.tracker.ServiceTracker.

void org.osgi.util.tracker.ServiceTrackerCustomizer.modifiedService ( ServiceReference  reference,
Object  service 
)

A service tracked by the ServiceTracker object has been modified.

This method is called when a service being tracked by the ServiceTracker object has had it properties modified.

Parameters:
reference Reference to service that has been modified.
service The service object for the modified service.

Implemented in org.osgi.util.tracker.ServiceTracker.

Referenced by org.osgi.util.tracker.ServiceTracker.Tracked.track().

void org.osgi.util.tracker.ServiceTrackerCustomizer.removedService ( ServiceReference  reference,
Object  service 
)

A service tracked by the ServiceTracker object has been removed.

This method is called after a service is no longer being tracked by the ServiceTracker object.

Parameters:
reference Reference to service that has been removed.
service The service object for the removed service.

Implemented in org.osgi.util.tracker.ServiceTracker.

Referenced by org.osgi.util.tracker.ServiceTracker.Tracked.untrack().


The documentation for this interface was generated from the following file:
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