airflow livy 源码
airflow livy 代码
文件路径：/airflow/providers/apache/livy/sensors/livy.py
# Licensed to the Apache Software Foundation (ASF) under one
# or more contributor license agreements. See the NOTICE file
# distributed with this work for additional information
# 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
#
# Unless required by applicable law or agreed to in writing,
# software distributed under the License is distributed on an
# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
# KIND, either express or implied. See the License for the
# specific language governing permissions and limitations
# under the License.
"""This module contains the Apache Livy sensor."""
from __future__ import annotations
from typing import TYPE_CHECKING, Any, Sequence
from airflow.providers.apache.livy.hooks.livy import LivyHook
from airflow.sensors.base import BaseSensorOperator
if TYPE_CHECKING:
from airflow.utils.context import Context
class LivySensor(BaseSensorOperator):
"""
Monitor a Livy sessions for termination.
:param livy_conn_id: reference to a pre-defined Livy connection
:param batch_id: identifier of the monitored batch
depends on the option that's being modified.
"""
template_fields: Sequence[str] = ('batch_id',)
def __init__(
self,
*,
batch_id: int | str,
livy_conn_id: str = 'livy_default',
livy_conn_auth_type: Any | None = None,
extra_options: dict[str, Any] | None = None,
**kwargs: Any,
) -> None:
super().__init__(**kwargs)
self.batch_id = batch_id
self._livy_conn_id = livy_conn_id
self._livy_conn_auth_type = livy_conn_auth_type
self._livy_hook: LivyHook | None = None
self._extra_options = extra_options or {}
def get_hook(self) -> LivyHook:
"""
Get valid hook.
:return: hook
:rtype: LivyHook
"""
if self._livy_hook is None or not isinstance(self._livy_hook, LivyHook):
self._livy_hook = LivyHook(
livy_conn_id=self._livy_conn_id,
extra_options=self._extra_options,
auth_type=self._livy_conn_auth_type,
)
return self._livy_hook
def poke(self, context: Context) -> bool:
batch_id = self.batch_id
status = self.get_hook().get_batch_state(batch_id)
return status in self.get_hook().TERMINAL_STATES
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