airflow get_lineage 源码
airflow get_lineage 代码
文件路径：/airflow/api/common/experimental/get_lineage.py
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"""Lineage apis"""
from __future__ import annotations
import collections
import datetime
from typing import Any
from sqlalchemy.orm import Session
from airflow.api.common.experimental import check_and_get_dag, check_and_get_dagrun
from airflow.lineage import PIPELINE_INLETS, PIPELINE_OUTLETS
from airflow.models.xcom import XCom
from airflow.utils.session import NEW_SESSION, provide_session
@provide_session
def get_lineage(
dag_id: str, execution_date: datetime.datetime, *, session: Session = NEW_SESSION
) -> dict[str, dict[str, Any]]:
"""Gets the lineage information for dag specified."""
dag = check_and_get_dag(dag_id)
dagrun = check_and_get_dagrun(dag, execution_date)
inlets = XCom.get_many(dag_ids=dag_id, run_id=dagrun.run_id, key=PIPELINE_INLETS, session=session)
outlets = XCom.get_many(dag_ids=dag_id, run_id=dagrun.run_id, key=PIPELINE_OUTLETS, session=session)
lineage: dict[str, dict[str, Any]] = collections.defaultdict(dict)
for meta in inlets:
lineage[meta.task_id]["inlets"] = meta.value
for meta in outlets:
lineage[meta.task_id]["outlets"] = meta.value
return {"task_ids": {k: v for k, v in lineage.items()}}
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