code: public void addExcludeFromSpiderRegex(String ignoredRegex) throws DatabaseException {
  		// Validate its a valid regex first
  		Pattern.compile(ignoredRegex, Pattern.CASE_INSENSITIVE);
  
  		this.excludeFromSpiderRegexs.add(ignoredRegex);
  		model.getDb().getTableSessionUrl().setUrls(RecordSessionUrl.TYPE_EXCLUDE_FROM_SPIDER, this.excludeFromSpiderRegexs);
  	}
docs: Adds the given regular expression to the list of regular expressions used to exclude URLs from the spiders (e.g.
  traditional, AJAX).
  
  @param ignoredRegex the regular expression to be added
  @throws IllegalArgumentException if the regular expression is not valid.
  @throws DatabaseException if an error occurred while persisting the list.