ServiceLocator.java

 private static final String SERVICE_INTEGRANTE = "java:global/core/ServiceDeIntegrante";

    public Service lookup() {
        try {
            Properties properties = new Properties();
            properties.put(InitialContext.INITIAL_CONTEXT_FACTORY,
                    "com.sun.enterprise.naming.SerialInitContextFactory");
            properties.setProperty("org.omg.CORBA.ORBInitialHost", "localhost");
            properties.setProperty("org.omg.CORBA.ORBInitialPort", "3700");
            Context context = new InitialContext(properties);
            return  (Service) context.lookup(SERVICE_INTEGRANTE);
        } catch (NamingException ex) {
            Logger.getLogger(ServiceLocator.class.getName()).log(Level.SEVERE, null, ex);
        }
        return null;
    }