"Failed to process metadata.", e);
            }
        })
                .orElseThrow(() -> new SsoMessageException(
                        messages -> messages.addErrorsFailedToProcessSsoRequest(UserMessages.GLOBAL_PROPERTY_KEY, "Invalid state."),

     */
    public String getServerPath() {
        return getSessionManager().getAttribute(Constants.SEARCH_ENGINE_API_ACCESS_TOKEN, String.class)
                .map(token -> ADMIN_SERVER + token)
                .orElseThrow(() -> new FessSystemException("Cannot create an access token."));
    }

    /**
     * Generates and saves a new access token for the current session.
     * The token is used to authenticate API requests.

    }
    
    private ChannelInfo selectLeastLoaded(Collection<ChannelInfo> channels) {
        return channels.stream()
            .min(Comparator.comparingLong(ChannelInfo::getRequestsPending))
            .orElseThrow();
    }
    
    private ChannelInfo selectWeightedRandom(Collection<ChannelInfo> channels) {
        // Calculate total weight
        int totalWeight = channels.stream()