code: private boolean domainsAvailable() {
  		domainsFileLock.readLock().lock();
  		logger.trace("LOCK readlock");
  		try {
  			File f = getDomainFile();
  
  			if (!f.exists() || f.length() <= 0 )
  				return false;
  
  			// Re-download old copies of "latest"
  			if(updateFrequency != null && requestedVersion == DEFAULT_VERSION ) {
  				long mod = f.lastModified();
  				// Time of last update
  				Date lastUpdate = new Date();
  				Calendar cal = Calendar.getInstance();
  				cal.setTime(lastUpdate);
  				cal.add(Calendar.DAY_OF_WEEK, -updateFrequency);
  				long updateTime = cal.getTimeInMillis();
  				// Check if file predates last update
  				if( mod < updateTime ) {
  					logger.info("{} is out of date.",f);
  					return false;
  				}
  			}
  			return true;
  		} finally {
  			logger.trace("UNLOCK readlock");
  			domainsFileLock.readLock().unlock();
  		}
  	}
docs: Checks that the domains file has been downloaded
  @return