action.run();
            } catch (final Exception e) {
                logger.warn("Failed to process shutdown task.", e);
            }
        });
    }

    public String getUsername() {
        final RequestManager requestManager = ComponentUtil.getRequestManager();
        return requestManager.findUserBean(FessUserBean.class).map(FessUserBean::getUserId).orElse(Constants.GUEST_USER);
    }