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

            final int totalCount = process(options);
            if (totalCount != 0) {
                logger.info("Processed {} thumbnail task(s).", totalCount);

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

            // Register mock ThumbnailManager