def get_last_tid(self):
        try:
            spec = {'tid': {'$gt': 0}}
            sort = [('tid', -1)]
            row = self.db.docs.find_one(spec, sort=sort)
        except Exception as e:
            raise DatabaseException(e)
        if row:
            return row['tid']
        return 0
def create_on_device(self):
        resource = self.client.api.cm.shared.licensing.pools_s.pool.create(
            name=self.want.name,
            baseRegKey=self.want.base_key,
            method="AUTOMATIC"
        )
        return self._wait_for_license_pool_state_to_activate(resource)