public interface UnfilteredServiceListener extends ServiceListener
ServiceEvent listener that does not filter based upon any
filter string specified to
BundleContext.addServiceListener(ServiceListener, String). Using an
UnfilteredServiceListener and specifying a filter string to
BundleContext.addServiceListener(ServiceListener, String) allows the
listener to receive all ServiceEvent objects while still advising
ListenerHook implementation of the service interests in the filter
string.
For example, an implementation of Declarative Services would add an
UnfilteredServiceListener with a filter string listing all the
services referenced by all the service components. The Declarative Services
implementation would receive all ServiceEvent objects for internal
processing and a Remote Services discovery service implementation can observe
the service interests of the service components using a ListenerHook.
When the set of service components being processed changes, the Declarative
Services implementation would re-add the UnfilteredServiceListener
with an updated filter string.
When a ServiceEvent is fired, it is synchronously delivered to an
UnfilteredServiceListener. The Framework may deliver
ServiceEvent objects to an UnfilteredServiceListener out of
order and may concurrently call and/or reenter an
UnfilteredServiceListener.
An UnfilteredServiceListener object is registered with the Framework
using the BundleContext.addServiceListener method.
UnfilteredServiceListener objects are called with a
ServiceEvent object when a service is registered, modified, or is in
the process of unregistering.
ServiceEvent object delivery to UnfilteredServiceListener
objects are not filtered by the filter specified when the listener was
registered. If the Java Runtime Environment supports permissions, then some
filtering is done. ServiceEvent objects are only delivered to the
listener if the bundle which defines the listener object's class has the
appropriate ServicePermission to get the service using at least one
of the named classes under which the service was registered.
ServiceEvent,
ServicePermissionserviceChangedCopyright © 2007-2017 FuseSource, Corp.. All Rights Reserved.