examples/sample.js.debugdisplay/src/sample/js/debugdisplay/Activator.java

package sample.js.debugdisplay;

import java.net.URL;

import org.eclipse.e4.internal.languages.javascript.JSFrameworkImpl;
import org.eclipse.e4.languages.javascript.JSBundle;
import org.eclipse.e4.languages.javascript.JSBundleException;
import org.eclipse.e4.languages.javascript.JSFramework;
import org.osgi.framework.Bundle;
import org.osgi.framework.BundleActivator;
import org.osgi.framework.BundleContext;
import org.osgi.framework.ServiceReference;
import org.osgi.util.tracker.ServiceTracker;
import org.osgi.util.tracker.ServiceTrackerCustomizer;

public class Activator implements BundleActivator, ServiceTrackerCustomizer {
	
	public static final String TEST = "test";
	
	private BundleContext context;
	private ServiceTracker frameworkTracker;
	private JSFramework framework;

	private JSBundle jsBundle;

	public void start(BundleContext bundleContext) throws Exception {
		this.context = bundleContext;

		frameworkTracker = new ServiceTracker(context, JSFramework.class.getName(), this);
		frameworkTracker.open();	
	}

	public void stop(BundleContext bundleContext) throws Exception {
		frameworkTracker.close();
		frameworkTracker = null;
		context = null;
	}

	public Object addingService(ServiceReference reference) {
		framework = (JSFramework) context.getService(reference);
		
		Bundle bundle = context.getBundle();
		URL jsBundleEntry = bundle.getEntry("scripts/bundle.json");
		if (jsBundleEntry == null)
			return null;


		try {
			 jsBundle =((JSFrameworkImpl)framework).installBundle(jsBundleEntry.toString(), bundle);
		} catch (JSBundleException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
		framework.resolve();
		return framework;
	}

	public void modifiedService(ServiceReference reference, Object service) {
	}

	public void removedService(ServiceReference reference, Object service) {
		jsBundle.uninstall();
		framework.resolve();
	}
	

}