/* | |
* Licensed to the Apache Software Foundation (ASF) under one or more | |
* contributor license agreements. See the NOTICE file distributed with | |
* this work for additional information regarding copyright ownership. | |
* The ASF licenses this file to You under the Apache License, Version 2.0 | |
* (the "License"); you may not use this file except in compliance with | |
* the License. You may obtain a copy of the License at | |
* | |
* http://www.apache.org/licenses/LICENSE-2.0 | |
* | |
* Unless required by applicable law or agreed to in writing, software | |
* distributed under the License is distributed on an "AS IS" BASIS, | |
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | |
* See the License for the specific language governing permissions and | |
* limitations under the License. | |
*/ | |
package org.apache.felix.webconsole.plugins.obr.internal; | |
import org.apache.felix.webconsole.SimpleWebConsolePlugin; | |
import org.osgi.framework.BundleActivator; | |
import org.osgi.framework.BundleContext; | |
import org.osgi.framework.Constants; | |
import org.osgi.framework.Filter; | |
import org.osgi.framework.ServiceReference; | |
import org.osgi.util.tracker.ServiceTracker; | |
import org.osgi.util.tracker.ServiceTrackerCustomizer; | |
/** | |
* Activator is the main starting class. | |
*/ | |
public class Activator implements BundleActivator, ServiceTrackerCustomizer, Constants | |
{ | |
private ServiceTracker tracker; | |
private BundleContext context; | |
private SimpleWebConsolePlugin plugin; | |
/** | |
* @see org.osgi.framework.BundleActivator#start(org.osgi.framework.BundleContext) | |
*/ | |
public final void start(BundleContext context) throws Exception | |
{ | |
this.context = context; | |
Filter filter = context.createFilter("(|" //$NON-NLS-1$ | |
+ '(' + OBJECTCLASS + "=org.osgi.service.obr.RepositoryAdmin)" //$NON-NLS-1$ | |
+ '(' + OBJECTCLASS + "=org.apache.felix.bundlerepository.RepositoryAdmin)" //$NON-NLS-1$ | |
+ ')'); | |
this.tracker = new ServiceTracker(context, filter, this); | |
this.tracker.open(); | |
} | |
/** | |
* @see org.osgi.framework.BundleActivator#stop(org.osgi.framework.BundleContext) | |
*/ | |
public final void stop(BundleContext context) throws Exception | |
{ | |
if (tracker != null) | |
{ | |
tracker.close(); | |
tracker = null; | |
} | |
} | |
// - begin tracker | |
/** | |
* @see org.osgi.util.tracker.ServiceTrackerCustomizer#modifiedService(org.osgi.framework.ServiceReference, | |
* java.lang.Object) | |
*/ | |
public final void modifiedService(ServiceReference reference, Object service) | |
{/* unused */ | |
} | |
/** | |
* @see org.osgi.util.tracker.ServiceTrackerCustomizer#addingService(org.osgi.framework.ServiceReference) | |
*/ | |
public final Object addingService(ServiceReference reference) | |
{ | |
SimpleWebConsolePlugin plugin = this.plugin; | |
if (plugin == null) | |
{ | |
this.plugin = plugin = new WebConsolePlugin().register(context); | |
} | |
return context.getService(reference); | |
} | |
/** | |
* @see org.osgi.util.tracker.ServiceTrackerCustomizer#removedService(org.osgi.framework.ServiceReference, | |
* java.lang.Object) | |
*/ | |
public final void removedService(ServiceReference reference, Object service) | |
{ | |
SimpleWebConsolePlugin plugin = this.plugin; | |
if (tracker.getTrackingCount() == 0 && plugin != null) | |
{ | |
plugin.unregister(); | |
this.plugin = null; | |
} | |
} | |
} |