airflow dagrun_backfill_dep 源码
airflow dagrun_backfill_dep 代码
文件路径：/airflow/ti_deps/deps/dagrun_backfill_dep.py
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# to you under the Apache License, Version 2.0 (the
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"""This module defines dep for making sure DagRun not a backfill."""
from __future__ import annotations
from airflow.ti_deps.deps.base_ti_dep import BaseTIDep
from airflow.utils.session import provide_session
from airflow.utils.types import DagRunType
class DagRunNotBackfillDep(BaseTIDep):
"""Dep for valid DagRun run_id to schedule from scheduler"""
NAME = "DagRun is not backfill job"
IGNORABLE = True
@provide_session
def _get_dep_statuses(self, ti, session, dep_context=None):
"""
Determines if the DagRun is valid for scheduling from scheduler.
:param ti: the task instance to get the dependency status for
:param session: database session
:param dep_context: the context for which this dependency should be evaluated for
:return: True if DagRun is valid for scheduling from scheduler.
"""
dagrun = ti.get_dagrun(session)
if dagrun.run_type == DagRunType.BACKFILL_JOB:
yield self._failing_status(
reason=f"Task's DagRun run_type is {dagrun.run_type} and cannot be run by the scheduler"
)
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