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/*******************************************************************************
* Copyright (c) 2007 Versant Corp.
* 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:
* Markus Kuppe (mkuppe <at> versant <dot> com) - initial API and implementation
******************************************************************************/
package org.eclipse.ecf.internal.provider.discovery;
import java.util.*;
import org.eclipse.ecf.discovery.service.IDiscoveryService;
import org.eclipse.ecf.provider.discovery.CompositeDiscoveryContainer;
import org.osgi.framework.*;
import org.osgi.util.tracker.ServiceTracker;
/**
*
*/
public class Activator implements BundleActivator {
// The shared instance
private static Activator plugin;
public static final String PLUGIN_ID = "org.eclipse.ecf.provider.discovery"; //$NON-NLS-1$
/**
* Returns the shared instance
*
* @return the shared instance
*/
public static Activator getDefault() {
return plugin;
}
private volatile ServiceTracker tracker;
/**
* The constructor
*/
public Activator() {
plugin = this;
}
/*
* (non-Javadoc)
* @see org.eclipse.core.runtime.Plugins#start(org.osgi.framework.BundleContext)
*/
public void start(final BundleContext context) throws Exception {
// get all previously registered IDS from OSGi
tracker = new ServiceTracker(context, IDiscoveryService.class.getName(), null);
tracker.open();
Object[] services = tracker.getServices();
List discoveries = services == null ? new ArrayList() : new ArrayList(Arrays.asList(services));
// register the composite discovery service)
final CompositeDiscoveryContainer cdc = new CompositeDiscoveryContainer(discoveries);
cdc.connect(null, null);
Properties props = new Properties();
props.put(IDiscoveryService.CONTAINER_ID, cdc.getID());
props.put(IDiscoveryService.CONTAINER_NAME, CompositeDiscoveryContainer.NAME);
context.registerService(IDiscoveryService.class.getName(), cdc, props);
// add a service listener to add/remove IDS dynamically
context.addServiceListener(new ServiceListener() {
/* (non-Javadoc)
* @see org.osgi.framework.ServiceListener#serviceChanged(org.osgi.framework.ServiceEvent)
*/
public void serviceChanged(ServiceEvent arg0) {
IDiscoveryService anIDS = (IDiscoveryService) context.getService(arg0.getServiceReference());
switch (arg0.getType()) {
case ServiceEvent.REGISTERED :
cdc.addContainer(anIDS);
break;
case ServiceEvent.UNREGISTERING :
cdc.removeContainer(anIDS);
break;
default :
break;
}
}
}, "(" + Constants.OBJECTCLASS + "=" + IDiscoveryService.class.getName() + ")"); //$NON-NLS-1$//$NON-NLS-2$ //$NON-NLS-3$
}
/*
* (non-Javadoc)
* @see org.eclipse.core.runtime.Plugin#stop(org.osgi.framework.BundleContext)
*/
public void stop(BundleContext context) throws Exception {
if (tracker != null) {
tracker.close();
tracker = null;
}
plugin = null;
}
}
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