airflow example_short_circuit_operator 源码
airflow example_short_circuit_operator 代码
文件路径：/airflow/example_dags/example_short_circuit_operator.py
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# to you under the Apache License, Version 2.0 (the
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"""Example DAG demonstrating the usage of the ShortCircuitOperator."""
from __future__ import annotations
import pendulum
from airflow import DAG
from airflow.models.baseoperator import chain
from airflow.operators.empty import EmptyOperator
from airflow.operators.python import ShortCircuitOperator
from airflow.utils.trigger_rule import TriggerRule
with DAG(
dag_id='example_short_circuit_operator',
start_date=pendulum.datetime(2021, 1, 1, tz="UTC"),
catchup=False,
tags=['example'],
) as dag:
cond_true = ShortCircuitOperator(
task_id='condition_is_True',
python_callable=lambda: True,
)
cond_false = ShortCircuitOperator(
task_id='condition_is_False',
python_callable=lambda: False,
)
ds_true = [EmptyOperator(task_id='true_' + str(i)) for i in [1, 2]]
ds_false = [EmptyOperator(task_id='false_' + str(i)) for i in [1, 2]]
chain(cond_true, *ds_true)
chain(cond_false, *ds_false)
[task_1, task_2, task_3, task_4, task_5, task_6] = [
EmptyOperator(task_id=f"task_{i}") for i in range(1, 7)
]
task_7 = EmptyOperator(task_id="task_7", trigger_rule=TriggerRule.ALL_DONE)
short_circuit = ShortCircuitOperator(
task_id="short_circuit", ignore_downstream_trigger_rules=False, python_callable=lambda: False
)
chain(task_1, [task_2, short_circuit], [task_3, task_4], [task_5, task_6], task_7)
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