Source code for airflow.secrets.metastore

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Objects relating to sourcing connections from metastore database

from typing import List

from airflow.models.connection import Connection
from airflow.secrets import BaseSecretsBackend
from airflow.utils.db import provide_session

[docs]class MetastoreBackend(BaseSecretsBackend): """ Retrieves Connection object from airflow metastore database. """ # pylint: disable=missing-docstring @provide_session
[docs] def get_connections(self, conn_id, session=None): # type: (...) -> List[Connection] conn_list = session.query(Connection).filter(Connection.conn_id == conn_id).all() session.expunge_all() return conn_list
[docs] def get_variable(self, key, session=None): """ Get Airflow Variable from Metadata DB :param key: Variable Key :type key: str :param session: Sqlalchemy ORM Session :return: Variable Value """ from airflow.models.variable import Variable var_value = session.query(Variable).filter(Variable.key == key).first() session.expunge_all() if var_value: return var_value.val return None

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