model.py 文件源码

def __init__(
        self,
        loop=None,
        max_frame_size=None,
        bakery_client=None,
        jujudata=None,
    ):
        """Instantiate a new Model.

        The connect method will need to be called before this
        object can be used for anything interesting.

        If jujudata is None, jujudata.FileJujuData will be used.

        :param loop: an asyncio event loop
        :param max_frame_size: See
            `juju.client.connection.Connection.MAX_FRAME_SIZE`
        :param bakery_client httpbakery.Client: The bakery client to use
            for macaroon authorization.
        :param jujudata JujuData: The source for current controller information.
        """
        self._connector = connector.Connector(
            loop=loop,
            max_frame_size=max_frame_size,
            bakery_client=bakery_client,
            jujudata=jujudata,
        )
        self._observers = weakref.WeakValueDictionary()
        self.state = ModelState(self)
        self._info = None
        self._watch_stopping = asyncio.Event(loop=self._connector.loop)
        self._watch_stopped = asyncio.Event(loop=self._connector.loop)
        self._watch_received = asyncio.Event(loop=self._connector.loop)
        self._watch_stopped.set()
        self._charmstore = CharmStore(self._connector.loop)