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OSGi™ Core Release 5 |
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public interface UnfilteredServiceListener
A 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
,
ServicePermission
Method Summary |
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Methods inherited from interface org.osgi.framework.ServiceListener |
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serviceChanged |
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