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/*******************************************************************************
* Copyright (c) 2006, 2013 Cognos Incorporated, IBM Corporation
* 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
* Chris Aniszczyk <zx@us.ibm.com> - bug 209294
*******************************************************************************/
package org.eclipse.equinox.internal.cm;
import org.osgi.framework.*;
import org.osgi.service.cm.ConfigurationAdmin;
/**
* Activator start the ConfigurationAdminFactory but also handles passing in the Service
* Registration needed by Asynch threads. Asynch threads are controlled by ConfigurationAdminFactory
* start and stop. It requires some care to handle pending events as the service is registered before
* activating the threads. (see EventDispatcher)
*/
public class Activator implements BundleActivator {
private static final String EVENT_ADMIN_CLASS = "org.osgi.service.event.EventAdmin"; //$NON-NLS-1$
private LogTracker logTracker;
private ServiceRegistration<ConfigurationAdmin> registration;
private ConfigurationAdminFactory factory;
private ConfigurationEventAdapter eventAdapter;
private static BundleContext bundleContext;
private static synchronized void setBundleContext(BundleContext context) {
bundleContext = context;
}
public static synchronized String getProperty(String key) {
if (bundleContext != null)
return bundleContext.getProperty(key);
return null;
}
public void start(BundleContext context) throws Exception {
setBundleContext(context);
logTracker = new LogTracker(context, System.err);
logTracker.open();
if (checkEventAdmin()) {
eventAdapter = new ConfigurationEventAdapter(context);
eventAdapter.start();
}
factory = new ConfigurationAdminFactory(context, logTracker);
factory.start();
context.addBundleListener(factory);
registration = context.registerService(ConfigurationAdmin.class, factory, null);
}
public void stop(BundleContext context) throws Exception {
registration.unregister();
registration = null;
context.removeBundleListener(factory);
factory.stop();
factory = null;
if (eventAdapter != null) {
eventAdapter.stop();
eventAdapter = null;
}
logTracker.close();
logTracker = null;
setBundleContext(null);
}
private static boolean checkEventAdmin() {
// cannot support scheduling without the event admin package
try {
Class.forName(EVENT_ADMIN_CLASS);
return true;
} catch (ClassNotFoundException e) {
return false;
}
}
}
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