44 строки
1.4 KiB
Python
44 строки
1.4 KiB
Python
# -*- coding: utf-8 -*-
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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"""
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Example LatestOnlyOperator and TriggerRule interactions
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"""
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import datetime as dt
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import airflow
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from airflow.models import DAG
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from airflow.operators.dummy_operator import DummyOperator
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from airflow.operators.latest_only_operator import LatestOnlyOperator
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from airflow.utils.trigger_rule import TriggerRule
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dag = DAG(
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dag_id='latest_only_with_trigger',
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schedule_interval=dt.timedelta(hours=4),
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start_date=airflow.utils.dates.days_ago(2),
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)
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latest_only = LatestOnlyOperator(task_id='latest_only', dag=dag)
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task1 = DummyOperator(task_id='task1', dag=dag)
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task1.set_upstream(latest_only)
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task2 = DummyOperator(task_id='task2', dag=dag)
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task3 = DummyOperator(task_id='task3', dag=dag)
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task3.set_upstream([task1, task2])
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task4 = DummyOperator(task_id='task4', dag=dag,
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trigger_rule=TriggerRule.ALL_DONE)
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task4.set_upstream([task1, task2])
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