try {
            return excludeFilterCache.get(sessionId);
        } catch (final ExecutionException e) {
            throw new CrawlerSystemException(e);
        }
    }

    public void setFilterCacheExpireAfterWrite(final int filterCacheExpireAfterWrite) {
        this.filterCacheExpireAfterWrite = filterCacheExpireAfterWrite;
    }

    public void setMaxLoadSize(final int maxLoadSize) {