// Register mock FessConfig
            FessConfig mockConfig = new FessConfig.SimpleImpl() {
                @Override
                public Integer getThumbnailSystemMonitorIntervalAsInteger() {
                    return 60;
                }
            };
            ComponentUtil.register(mockConfig, "fessConfig");

            // Register mock ThumbnailManager

            systemMonitorTask = TimeoutManager.getInstance()
                    .addTimeoutTarget(new SystemMonitorTarget(), ComponentUtil.getFessConfig().getThumbnailSystemMonitorIntervalAsInteger(),
                            true);

            if (ComponentUtil.getFessConfig().isLogNotificationEnabled()) {
                logNotificationTarget = new LogNotificationTarget();