manager.py 文件源码

def wrap_instance_event(function):
    """Wraps a method to log the event taken on the instance, and result.

    This decorator wraps a method to log the start and result of an event, as
    part of an action taken on an instance.
    """

    @functools.wraps(function)
    def decorated_function(self, context, *args, **kwargs):
        wrapped_func = safe_utils.get_wrapped_function(function)
        keyed_args = inspect.getcallargs(wrapped_func, self, context, *args,
                                         **kwargs)
        instance_uuid = keyed_args['instance']['uuid']

        event_name = 'compute_{0}'.format(function.__name__)
        with compute_utils.EventReporter(context, event_name, instance_uuid):
            return function(self, context, *args, **kwargs)

    return decorated_function