Source code for airflow.providers.cloudant.hooks.cloudant
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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
[docs]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.
"""
[docs] conn_name_attr = "cloudant_conn_id"
[docs] default_conn_name = "cloudant_default"
@classmethod
[docs] def get_ui_field_behaviour(cls) -> dict[str, Any]:
"""Return 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
[docs] def get_conn(self) -> cloudant:
"""
Open a connection to the cloudant service and close 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.
"""
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}")