airflow cloudant 源码
airflow cloudant 代码
文件路径：/airflow/providers/cloudant/hooks/cloudant.py
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# Licensed to the Apache Software Foundation (ASF) under one
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# regarding copyright ownership. The ASF licenses this file
# to you under the Apache License, Version 2.0 (the
# "License"); you may not use this file except in compliance
# with the License. You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
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# KIND, either express or implied. See the License for the
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"""Hook for Cloudant"""
from __future__ import annotations
from typing import Any
from cloudant import cloudant # type: ignore[attr-defined]
from airflow.exceptions import AirflowException
from airflow.hooks.base import BaseHook
class CloudantHook(BaseHook):
"""
Interact with Cloudant. This class is a thin wrapper around the cloudant python library.
.. seealso:: the latest documentation `here <https://python-cloudant.readthedocs.io/en/latest/>`_.
:param cloudant_conn_id: The connection id to authenticate and get a session object from cloudant.
"""
conn_name_attr = 'cloudant_conn_id'
default_conn_name = 'cloudant_default'
conn_type = 'cloudant'
hook_name = 'Cloudant'
@staticmethod
def get_ui_field_behaviour() -> dict[str, Any]:
"""Returns custom field behaviour"""
return {
"hidden_fields": ['port', 'extra'],
"relabeling": {'host': 'Account', 'login': 'Username (or API Key)', 'schema': 'Database'},
}
def __init__(self, cloudant_conn_id: str = default_conn_name) -> None:
super().__init__()
self.cloudant_conn_id = cloudant_conn_id
def get_conn(self) -> cloudant:
"""
Opens a connection to the cloudant service and closes it automatically if used as context manager.
.. note::
In the connection form:
- 'host' equals the 'Account' (optional)
- 'login' equals the 'Username (or API Key)' (required)
- 'password' equals the 'Password' (required)
:return: an authorized cloudant session context manager object.
:rtype: cloudant
"""
conn = self.get_connection(self.cloudant_conn_id)
self._validate_connection(conn)
cloudant_session = cloudant(user=conn.login, passwd=conn.password, account=conn.host)
return cloudant_session
def _validate_connection(self, conn: cloudant) -> None:
for conn_param in ['login', 'password']:
if not getattr(conn, conn_param):
raise AirflowException(f'missing connection parameter {conn_param}')
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