Package org.apache.felix.http.base.internal.whiteboard.tracker

Class WhiteboardServiceTracker<T>

java.lang.Object

org.osgi.util.tracker.ServiceTracker<T,org.osgi.framework.ServiceReference<T>>

org.apache.felix.http.base.internal.whiteboard.tracker.WhiteboardServiceTracker<T>

All Implemented Interfaces:

org.osgi.util.tracker.ServiceTrackerCustomizer<T,org.osgi.framework.ServiceReference<T>>

Direct Known Subclasses:

FilterTracker, ListenersTracker, PreprocessorTracker, ResourceTracker, ServletTracker

public abstract class WhiteboardServiceTracker<T>
extends org.osgi.util.tracker.ServiceTracker<T,org.osgi.framework.ServiceReference<T>>

Service tracker for all whiteboard services except servlet context helper. This tracker does not get/unget the service objects itself, but just forwards the service reference by creating an info data object. Each sub class creates a different data object.

Field Summary

Fields inherited from class org.osgi.util.tracker.ServiceTracker

context, filter

Constructor Summary

Constructors

Constructor	Description
WhiteboardServiceTracker(WhiteboardManager contextManager, org.osgi.framework.BundleContext bundleContext, String filterExpr)	Create a new tracker

Method Summary

Modifier and Type	Method	Description
org.osgi.framework.ServiceReference<T>	addingService(org.osgi.framework.ServiceReference<T> ref)
void	close()
protected abstract WhiteboardServiceInfo<T>	getServiceInfo(org.osgi.framework.ServiceReference<T> ref)	Implemented by sub classes to create the correct whiteboard service info object.
void	modifiedService(org.osgi.framework.ServiceReference<T> ref, org.osgi.framework.ServiceReference<T> service)
void	removedService(org.osgi.framework.ServiceReference<T> ref, org.osgi.framework.ServiceReference<T> service)

Methods inherited from class org.osgi.util.tracker.ServiceTracker

getService, getService, getServiceReference, getServiceReferences, getServices, getServices, getTracked, getTrackingCount, isEmpty, open, open, remove, size, waitForService

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

WhiteboardServiceTracker

public WhiteboardServiceTracker(WhiteboardManager contextManager,
                                org.osgi.framework.BundleContext bundleContext,
                                String filterExpr)

Create a new tracker

Parameters:

contextManager - The context manager

bundleContext - The bundle context.

filterExpr - The filter expression for the services to track

Method Detail

close

public void close()

Overrides:

close in class org.osgi.util.tracker.ServiceTracker<T,org.osgi.framework.ServiceReference<T>>

addingService

public final org.osgi.framework.ServiceReference<T> addingService(org.osgi.framework.ServiceReference<T> ref)

Specified by:

addingService in interface org.osgi.util.tracker.ServiceTrackerCustomizer<T,org.osgi.framework.ServiceReference<T>>

Overrides:

addingService in class org.osgi.util.tracker.ServiceTracker<T,org.osgi.framework.ServiceReference<T>>

modifiedService

public final void modifiedService(org.osgi.framework.ServiceReference<T> ref,
                                  org.osgi.framework.ServiceReference<T> service)

Specified by:

modifiedService in interface org.osgi.util.tracker.ServiceTrackerCustomizer<T,org.osgi.framework.ServiceReference<T>>

Overrides:

modifiedService in class org.osgi.util.tracker.ServiceTracker<T,org.osgi.framework.ServiceReference<T>>

removedService

public final void removedService(org.osgi.framework.ServiceReference<T> ref,
                                 org.osgi.framework.ServiceReference<T> service)

Specified by:

removedService in interface org.osgi.util.tracker.ServiceTrackerCustomizer<T,org.osgi.framework.ServiceReference<T>>

Overrides:

removedService in class org.osgi.util.tracker.ServiceTracker<T,org.osgi.framework.ServiceReference<T>>

getServiceInfo

protected abstract WhiteboardServiceInfo<T> getServiceInfo(org.osgi.framework.ServiceReference<T> ref)

Implemented by sub classes to create the correct whiteboard service info object.

Parameters:

ref - The service reference

Returns:

A whiteboard service info