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From jburwell <>
Subject [GitHub] cloudstack pull request: CLOUDSTACK-9323: Fix cancel host maintena...
Date Fri, 08 Apr 2016 00:15:11 GMT
Github user jburwell commented on a diff in the pull request:
    --- Diff: tools/marvin/marvin/lib/ ---
    @@ -520,4 +520,22 @@ def verifyRouterState(apiclient, routerid, allowedstates):
         if routers[0].state.lower() not in allowedstates:
             return [FAIL, "state of the router should be in %s but is %s" %
                 (allowedstates, routers[0].state)]
    -    return [PASS, None]
    \ No newline at end of file
    +    return [PASS, None]
    +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:
    +        return INVALID_INPUT
    +    success = False
    +    for i in range(0,no_of_times):
    +        time.sleep(retry_interval)
    +        success = callback(*callback_args)
    +        if success[0]: 
    +            break 
    +    return success
    --- End diff --
    Consider a multi-return -- allowing callers to unambiguously determine success/failure
vs the results of the method
    return (success, result)

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