Function wait_until

tools/marvin/marvin/lib/utils.py:600–616

Utility method to try out the callback method at most no_of_times with a interval of retry_interval, Will return immediately if callback returns True. The callback method should be written to return a list of values first being a boolean

(retry_interval=2, no_of_times=2, callback=None, *callback_args)

def wait_until(retry_interval=2, no_of_times=2, callback=None, *callback_args):
    """ Utility method to try out the callback method at most no_of_times with a interval of retry_interval,
        Will return immediately if callback returns True. The callback method should be written to return a list of values first being a boolean """

    if callback is None:
        raise ("Bad value for callback method !")

    wait_result = False
    for i in range(0,no_of_times):
        time.sleep(retry_interval)
        wait_result, return_val = callback(*callback_args)
        if not(isinstance(wait_result, bool)):
            raise ("Bad parameter returned from callback !")
        if wait_result :
            break

    return wait_result, return_val