| # |
| # 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. |
| |
| """Example DAG demonstrating the usage of the ShortCircuitOperator.""" |
| from airflow import DAG |
| from airflow.models.baseoperator import chain |
| from airflow.operators.dummy import DummyOperator |
| from airflow.operators.python import ShortCircuitOperator |
| from airflow.utils import dates |
| |
| args = { |
| 'owner': 'airflow', |
| } |
| |
| with DAG( |
| dag_id='example_short_circuit_operator', |
| default_args=args, |
| start_date=dates.days_ago(2), |
| 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 = [DummyOperator(task_id='true_' + str(i)) for i in [1, 2]] |
| ds_false = [DummyOperator(task_id='false_' + str(i)) for i in [1, 2]] |
| |
| chain(cond_true, *ds_true) |
| chain(cond_false, *ds_false) |