dashboard.py 文件源码

def update_charts(q, event, size):
    try:
        os.nice(10)
    except AttributeError:
        logging.warn("can't be nice to windows")
    q.put((CRAWL_MESSAGE, 4, 'Chart engine starting...'))
    base_map = graphics.create_map()
    last_qso_timestamp = 0
    q.put((CRAWL_MESSAGE, 4, ''))

    try:
        while not event.is_set():
            t0 = time.time()
            last_qso_timestamp = load_data(size, q, base_map, last_qso_timestamp)
            t1 = time.time()
            delta = t1 - t0
            update_delay = config.DATA_DWELL_TIME - delta
            if update_delay < 0:
                update_delay = config.DATA_DWELL_TIME
            logging.debug('Next data update in %f seconds', update_delay)
            event.wait(update_delay)
    except Exception, e:
        logging.exception('Exception in update_charts', exc_info=e)
        q.put((CRAWL_MESSAGE, 4, 'Chart engine failed.', graphics.YELLOW, graphics.RED))