def do_clean_board(cursor=None):
thq = Board.all()
if cursor:
thq.with_cursor(cursor)
board = thq.get()
if not board:
logging.info("stop board clean")
return
threads = Thread.load_list(board.thread, board.key().name())
board.thread = [th for (th,data) in threads if data]
fill_board(board)
board.put()
Cache.remove("board", board.key().name())
deferred.defer(do_clean_board, thq.cursor())
