@Startup
@Singleton
@DependsOn("adminServiceBean")
public class InstallServicesBean {

    private static Logger logger = LoggerFactory.getLogger(InstallServicesBean.class);

    @Inject
    private MyServiceListener listener;
    
    @Inject
    private MyServiceBean adminService;
    

    @PostConstruct
    public void installService() {
        BundleContext m_context = ServiceActivator.m_context;

        String filter = "(" + Constants.OBJECTCLASS + "=" + BaseService.class.getName() + ")";
        ServiceReference[] refs = null;

        try {
            m_context.addServiceListener(listener, filter);
            logger.debug("Added a service listener to install services");
            refs = m_context.getServiceReferences(null, filter);
        } catch (InvalidSyntaxException e) {
            logger.error("InvalidSyntaxException: ", e);
        }
        if (refs != null) {
            for (ServiceReference r : refs) {
                //send pseudo events for existing services
                listener.serviceChanged(new ServiceEvent(ServiceEvent.REGISTERED, r));
            }
        }
    }

    private class MyServiceListener implements ServiceListener {


        public synchronized void serviceChanged(ServiceEvent event) {
            switch (event.getType()) {
                case ServiceEvent.REGISTERED:
                    //try {//lookup  EJB every time, otherwise we get exception "Attempt to invoke when container is in Undeployed"
                    //    adminService = (MyServiceBean) new InitialContext().lookup("java:global/com.ex.test-war/adminServiceBean");
                    //} catch (NamingException e) {
                    //    logger.error("MyServiceListener - exception: ",e);
                    //}
                    //do something
                    adminService.installService(serviceName);
                    break;
            }
        }
    }

}