/*
* 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.packageadmin.internal;
import java.util.Dictionary;
import java.util.Hashtable;
import org.apache.felix.webconsole.ConfigurationPrinter;
import org.apache.felix.webconsole.SimpleWebConsolePlugin;
import org.apache.felix.webconsole.WebConsoleConstants;
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;
/**
* This is the main starting class of the bundle.
*/
public class Activator implements BundleActivator, ServiceTrackerCustomizer
{
private ServiceTracker pkgAdminTracker;
private BundleContext context;
private SimpleWebConsolePlugin plugin;
private ServiceRegistration printerReg;
/**
* @see org.osgi.framework.BundleActivator#start(org.osgi.framework.BundleContext)
*/
public void start(final BundleContext context) throws Exception
{
this.context = context;
this.pkgAdminTracker = new ServiceTracker(context,
"org.osgi.service.packageadmin.PackageAdmin", this); //$NON-NLS-1$
this.pkgAdminTracker.open();
// register configuration printer
final Dictionary/*<String, Object>*/props = new Hashtable/*<String, Object>*/();
props.put(WebConsoleConstants.CONFIG_PRINTER_MODES, new String[] {
ConfigurationPrinter.MODE_ZIP, ConfigurationPrinter.MODE_TXT });
printerReg = context.registerService(
"org.apache.felix.webconsole.ConfigurationPrinter", //$NON-NLS-1$
new WebConsolePrinter(context, pkgAdminTracker), props);
}
/**
* @see org.osgi.framework.BundleActivator#stop(org.osgi.framework.BundleContext)
*/
public void stop(final BundleContext context) throws Exception
{
if (printerReg != null)
{
printerReg.unregister();
printerReg = null;
}
if (this.pkgAdminTracker != null)
{
this.pkgAdminTracker.close();
this.pkgAdminTracker = null;
}
this.context = 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;
Object ret = null;
if (plugin == null)
{
ret = context.getService(reference);
this.plugin = plugin = new WebConsolePlugin(context, ret).register(context);
}
return ret;
}
/**
* @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 (pkgAdminTracker.size() <= 1 && plugin != null)
{
plugin.unregister();
this.plugin = null;
}
}
}