if (!result.isEmpty()) {
                delete(userDN, adminEnv);
            } else {
                logger.info("{} does not exist in LDAP server.", user.getName());
            }
        });

    }

    public void insert(final Role role) {
        if (!fessConfig.isLdapAdminEnabled()) {
            return;
        }

            if (logger.isDebugEnabled()) {
                logger.debug("Failed to process a scroll request.", e);
            }
            writeJsonResponse(HttpServletResponse.SC_INTERNAL_SERVER_ERROR, e);
        }

    }

    protected void processPingRequest(final HttpServletRequest request, final HttpServletResponse response, final FilterChain chain) {
        if (!acceptHttpMethod(request, GET)) {

    ...