protected void insert(final String entryDN, final Attributes entry, final Supplier<Hashtable<String, String>> envSupplier) {
        try (DirContextHolder holder = getDirContext(envSupplier)) {
            logger.debug("Inserting {}", entryDN);
            holder.get().createSubcontext(entryDN, entry);
        } catch (final NamingException e) {
            throw new LdapOperationException("Failed to add " + entryDN, e);
        }
    }

        defaultSettings.put("onelogin.saml2.sp.entityid", "http://localhost:8080/sso/metadata");
        defaultSettings.put("onelogin.saml2.sp.assertion_consumer_service.url", "http://localhost:8080/sso/");
        defaultSettings.put("onelogin.saml2.sp.assertion_consumer_service.binding", "urn:oasis:names:tc:SAML:2.0:bindings:HTTP-POST");

                        entry.map.put(domain, new HashMap<String, CacheEntry<DfsReferralDataInternal>>());
                        if ( log.isTraceEnabled() ) {
                            log.trace("Inserting cache entry for domain " + domain + ": " + dr);
                        }
                        dr = dr.next();
                    }
                    while ( dr != start );