* @return true if the CPU load is within the acceptable range, false otherwise.
     */
    public boolean calibrateCpuLoad(final long timeoutInMillis) {
        final short percent = ComponentUtil.getFessConfig().getAdaptiveLoadControlAsInteger().shortValue();
        if (percent <= 0) {
            return true;
        }
        short current = getSystemCpuPercent();
        if (current < percent) {
            return true;
        }

     * @return The value of found property. (NotNull: if not found, exception but basically no way)
     * @throws NumberFormatException When the property is not integer.
     */
    Integer getAdaptiveLoadControlAsInteger();

    /**
     * Get the value for the key 'supported.uploaded.js.extentions'. <br>
     * The value is, e.g. js <br>
     * comment: Supported JavaScript file extensions for upload.