airflow extra_link_endpoint 源码
airflow extra_link_endpoint 代码
文件路径：/airflow/api_connexion/endpoints/extra_link_endpoint.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.
from __future__ import annotations
from sqlalchemy.orm.session import Session
from airflow import DAG
from airflow.api_connexion import security
from airflow.api_connexion.exceptions import NotFound
from airflow.api_connexion.types import APIResponse
from airflow.exceptions import TaskNotFound
from airflow.models.dagbag import DagBag
from airflow.security import permissions
from airflow.utils.airflow_flask_app import get_airflow_app
from airflow.utils.session import NEW_SESSION, provide_session
@security.requires_access(
[
(permissions.ACTION_CAN_READ, permissions.RESOURCE_DAG),
(permissions.ACTION_CAN_READ, permissions.RESOURCE_DAG_RUN),
(permissions.ACTION_CAN_READ, permissions.RESOURCE_TASK_INSTANCE),
],
)
@provide_session
def get_extra_links(
*,
dag_id: str,
dag_run_id: str,
task_id: str,
session: Session = NEW_SESSION,
) -> APIResponse:
"""Get extra links for task instance"""
from airflow.models.taskinstance import TaskInstance
dagbag: DagBag = get_airflow_app().dag_bag
dag: DAG = dagbag.get_dag(dag_id)
if not dag:
raise NotFound("DAG not found", detail=f'DAG with ID = "{dag_id}" not found')
try:
task = dag.get_task(task_id)
except TaskNotFound:
raise NotFound("Task not found", detail=f'Task with ID = "{task_id}" not found')
ti = (
session.query(TaskInstance)
.filter(
TaskInstance.dag_id == dag_id,
TaskInstance.run_id == dag_run_id,
TaskInstance.task_id == task_id,
)
.one_or_none()
)
if not ti:
raise NotFound("DAG Run not found", detail=f'DAG Run with ID = "{dag_run_id}" not found')
all_extra_link_pairs = (
(link_name, task.get_extra_links(ti, link_name)) for link_name in task.extra_links
)
all_extra_links = {
link_name: link_url if link_url else None for link_name, link_url in sorted(all_extra_link_pairs)
}
return all_extra_links
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