def mqtt_connected(func):
    """
        MQTTClient coroutines decorator which will wait until connection before calling the decorated method.
        :param func: coroutine to be called once connected
        :return: coroutine result
    """
    @asyncio.coroutine
    @wraps(func)
    def wrapper(self, *args, **kwargs):
        if not self._connected_state.is_set():
            base_logger.warning("Client not connected, waiting for it")
            _, pending = yield from asyncio.wait([self._connected_state.wait(), self._no_more_connections.wait()], return_when=asyncio.FIRST_COMPLETED)
            for t in pending:
                t.cancel()
            if self._no_more_connections.is_set():
                raise ClientException("Will not reconnect")
        return (yield from func(self, *args, **kwargs))
    return wrapper
MQTTClient coroutines decorator which will wait until connection before calling the decorated method.
        :param func: coroutine to be called once connected
        :return: coroutine result