}

        @Override
        public String getNotificationTo() {
            return notificationTo;
        }

        @Override
        public Integer getLogNotificationIntervalAsInteger() {
            return 300;
        }

        @Override
        public String getIndexLogIndex() {
            return "fess_log";
        }

        @Override

                    postcard.setLevel(level);
                    postcard.setCount(String.valueOf(levelEvents.size()));
                    postcard.setInterval(String.valueOf(fessConfig.getLogNotificationIntervalAsInteger()));
                    postcard.setDetails(details);
                });
            } catch (final Exception e) {
                logger.warn("Failed to send log notification.", e);

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

    /**
     * The simple implementation for configuration.
     * @author FreeGen
     */
    public static class SimpleImpl extends FessEnv.SimpleImpl implements FessConfig {