Object obj = context.getAttribute(MailDelivery.ConfigAttributeName_MailDelivery);
if( null == obj ){
throw new ServletException("Mail delivery is not specified ("+MailDelivery.ConfigAttributeName_MailDelivery+")");
}
if( obj instanceof MailDelivery ){
MailDelivery mailDelivery = (MailDelivery)obj;
userMailNotification = new UserMailNotificationImpl(mailDelivery);
} else {
throw new ServletException("Unexpected object for mail delivery: "+obj.getClass().getName());
}
}