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/*******************************************************************************
* Copyright (c) 2005, 2007 Cognos Incorporated, IBM Corporation and others.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* Contributors:
* Cognos Incorporated - initial API and implementation
* IBM Corporation - bug fixes and enhancements
*******************************************************************************/
package org.eclipse.equinox.http.registry.internal;
import org.eclipse.core.runtime.IExtensionRegistry;
import org.osgi.framework.*;
import org.osgi.service.packageadmin.PackageAdmin;
import org.osgi.util.tracker.ServiceTracker;
import org.osgi.util.tracker.ServiceTrackerCustomizer;
public class Activator implements BundleActivator, ServiceTrackerCustomizer {
private ServiceTracker httpServiceTracker;
private ServiceTracker packageAdminTracker;
private ServiceTracker registryTracker;
private PackageAdmin packageAdmin;
private IExtensionRegistry registry;
private BundleContext context;
public void start(BundleContext context) throws Exception {
this.context = context;
packageAdminTracker = new ServiceTracker(context, PackageAdmin.class.getName(), this);
packageAdminTracker.open();
registryTracker = new ServiceTracker(context, IExtensionRegistry.class.getName(), this);
registryTracker.open();
}
public void stop(BundleContext context) throws Exception {
packageAdminTracker.close();
packageAdminTracker = null;
registryTracker.close();
registryTracker = null;
this.context = null;
}
public Object addingService(ServiceReference reference) {
Object service = context.getService(reference);
if (service instanceof PackageAdmin && packageAdmin == null)
packageAdmin = (PackageAdmin) service;
if (service instanceof IExtensionRegistry && registry == null)
registry = (IExtensionRegistry) service;
if (packageAdmin != null && registry != null) {
httpServiceTracker = new HttpServiceTracker(context, packageAdmin, registry);
httpServiceTracker.open();
}
return service;
}
public void modifiedService(ServiceReference reference, Object service) {
// ignore
}
public void removedService(ServiceReference reference, Object service) {
if (service == packageAdmin)
packageAdmin = null;
if (service == registry)
registry = null;
if (packageAdmin == null || registry == null) {
if (httpServiceTracker != null) {
httpServiceTracker.close();
httpServiceTracker = null;
}
}
context.ungetService(reference);
}
}
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