public void delete(Member persistentInstance) {
		log.debug("deleting Member instance");
		try {
			Session session = getSession();
			Transaction tr = session.beginTransaction();
			session.delete(persistentInstance);
			tr.commit();
			session.flush();
			session.close();
			log.debug("delete successful");
		} catch (RuntimeException re) {
			log.error("delete failed", re);
			throw re;
		}
	}