Activator.java

package org.eclipse.ecf.internal.examples.webinar;

import org.eclipse.ecf.core.IContainer;
import org.eclipse.ecf.core.IContainerManager;
import org.eclipse.ui.plugin.AbstractUIPlugin;
import org.osgi.framework.BundleContext;
import org.osgi.util.tracker.ServiceTracker;

/**
 * The activator class controls the plug-in life cycle
 */
public class Activator extends AbstractUIPlugin {

	// The plug-in ID
	public static final String PLUGIN_ID = "org.eclipse.ecf.internal.examples.webinar.util";

	// The shared instance
	private static Activator plugin;

	private BundleContext context;

	/**
	 * The constructor
	 */
	public Activator() {
	}

	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.ui.plugin.AbstractUIPlugin#start(org.osgi.framework.BundleContext)
	 */
	public void start(BundleContext context) throws Exception {
		super.start(context);
		this.context = context;
		plugin = this;
	}

	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.ui.plugin.AbstractUIPlugin#stop(org.osgi.framework.BundleContext)
	 */
	public void stop(BundleContext context) throws Exception {
		plugin = null;
		super.stop(context);
		this.context = null;
	}

	/**
	 * Returns the shared instance
	 * 
	 * @return the shared instance
	 */
	public static Activator getDefault() {
		return plugin;
	}

	/**
	 * @return array of containers.
	 * 
	 */
	public IContainer[] getContainers() {
		final ServiceTracker tracker = new ServiceTracker(context, IContainerManager.class.getName(), null);
		tracker.open();
		return ((IContainerManager) tracker.getService()).getAllContainers();
	}

}