def get_next_id(self):
        try:
            query = {'_id': 'last_id'}
            update = {'$inc': {'id': 1}}
            fn = self.db.internal.find_and_modify
            row = fn(query, update, upsert=True, new=True)
        except Exception as e:
            raise DatabaseException(e)
        return row['id']
def __init__(self, resolver, proxy_type, key):
        if proxy_type == "file":
            self._method = resolver.get_file_content
        elif proxy_type == "param":
            self._method = resolver.get_parameter_value
        elif proxy_type == "secret":
            self._method = resolver.get_secret_value
        elif proxy_type == "bucket_file":
            self._method = resolver.get_bucket_file
        else:
            raise ValueError("Unknown proxy type %s", proxy_type)
        self._key = key