/*
* 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.ds.internal;
import java.util.Hashtable;
import org.apache.felix.inventory.InventoryPrinter;
import org.apache.felix.webconsole.SimpleWebConsolePlugin;
import org.osgi.framework.BundleActivator;
import org.osgi.framework.BundleContext;
import org.osgi.framework.ServiceReference;
import org.osgi.framework.ServiceRegistration;
import org.osgi.util.tracker.ServiceTracker;
import org.osgi.util.tracker.ServiceTrackerCustomizer;
/**
* Activator is the main starting class.
*/
public class Activator implements BundleActivator, ServiceTrackerCustomizer
{
private ServiceTracker tracker;
private BundleContext context;
private SimpleWebConsolePlugin plugin;
private ServiceRegistration printerRegistration;
private ServiceRegistration infoRegistration;
/**
* @see org.osgi.framework.BundleActivator#start(org.osgi.framework.BundleContext)
*/
public final void start(BundleContext context) throws Exception
{
this.context = context;
this.tracker = new ServiceTracker(context, WebConsolePlugin.SCR_SERVICE, 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);
final Object service = context.getService(reference);
final Hashtable props = new Hashtable();
final String name = "Declarative Services Components";
props.put(InventoryPrinter.NAME, name.replace(' ', '_'));
props.put(InventoryPrinter.TITLE, name);
printerRegistration = context.registerService(InventoryPrinter.SERVICE,
new ComponentConfigurationPrinter(service), props);
infoRegistration = new InfoProvider(context.getBundle(), service).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)
{
// remove service
plugin.unregister();
this.plugin = null;
// unregister configuration printer too
ServiceRegistration reg = printerRegistration;
if (reg != null)
{
reg.unregister();
printerRegistration = null;
}
// unregister info provider too
reg = infoRegistration;
if (reg != null)
{
reg.unregister();
infoRegistration = null;
}
}
}
}