org.ops4j.pax.coin.repository
Class AbstractTracker<T,U>

java.lang.Object
  org.ops4j.pax.coin.repository.AbstractTracker<T,U>

Direct Known Subclasses:

ConfigPluginTracker, ConfigProviderTracker, ResourceScannerTracker

public class AbstractTracker<T,U>
extends java.lang.Object

Tracks services in OSGi Service Registry and registers/unregisters them with a configured repository.

Since:

0.3.0, February 27, 2008

Author:

Alin Dreghiciu

Constructor Summary

AbstractTracker(org.osgi.framework.BundleContext bundleContext, Repository<T> repository, java.lang.Class<U> clazz, java.lang.String name)
Constructor.

Method Summary

protected T	create(org.osgi.framework.ServiceReference reference, java.lang.Object service) Creates the object of repository type from the service.
void	start() Starts tracking.
void	stop() Stops tracking.

Methods inherited from class java.lang.Object

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

Constructor Detail

AbstractTracker

public AbstractTracker(org.osgi.framework.BundleContext bundleContext,
                       Repository<T> repository,
                       java.lang.Class<U> clazz,
                       java.lang.String name)

Constructor.

Parameters:

bundleContext - bundle context

repository - repository

clazz - class of tracked services

name - name tracked service type.

Throws:

org.ops4j.lang.NullArgumentException - - If bundle context is null - If repository is null - If clazz is null - If name is null or empty

Method Detail

start

public void start()

Starts tracking.

stop

public void stop()

Stops tracking.

create

protected T create(org.osgi.framework.ServiceReference reference,
                   java.lang.Object service)

Creates the object of repository type from the service.

Parameters:

reference - service refrence of the tracked service

service - tracked service

Returns:

created object