Activator.java

package osgi.hello.fr;

import org.osgi.framework.BundleActivator;
import org.osgi.framework.BundleContext;
import org.osgi.framework.ServiceRegistration;

import osgi.hello.HelloService;

public class Activator implements BundleActivator {
	HelloService service;
	ServiceRegistration reg;

	@Override
	public void start(BundleContext context) throws Exception {
		System.out.println("Starting HelloServiceFr");
		
		service = new HelloServiceFr();
		
		reg = context.registerService(HelloService.class.getName(), service, null);

	}

	@Override
	public void stop(BundleContext context) throws Exception {
		service = null;
		
		if (reg != null) {
			reg.unregister();
		}
		
	}

}