| # |
| # 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 BranchDayOfWeekOperator. |
| """ |
| from __future__ import annotations |
| |
| import pendulum |
| |
| from airflow import DAG |
| from airflow.operators.empty import EmptyOperator |
| from airflow.operators.weekday import BranchDayOfWeekOperator |
| from airflow.utils.weekday import WeekDay |
| |
| with DAG( |
| dag_id="example_weekday_branch_operator", |
| start_date=pendulum.datetime(2021, 1, 1, tz="UTC"), |
| catchup=False, |
| tags=["example"], |
| schedule="@daily", |
| ) as dag: |
| # [START howto_operator_day_of_week_branch] |
| empty_task_1 = EmptyOperator(task_id="branch_true") |
| empty_task_2 = EmptyOperator(task_id="branch_false") |
| empty_task_3 = EmptyOperator(task_id="branch_weekend") |
| empty_task_4 = EmptyOperator(task_id="branch_mid_week") |
| |
| branch = BranchDayOfWeekOperator( |
| task_id="make_choice", |
| follow_task_ids_if_true="branch_true", |
| follow_task_ids_if_false="branch_false", |
| week_day="Monday", |
| ) |
| branch_weekend = BranchDayOfWeekOperator( |
| task_id="make_weekend_choice", |
| follow_task_ids_if_true="branch_weekend", |
| follow_task_ids_if_false="branch_mid_week", |
| week_day={WeekDay.SATURDAY, WeekDay.SUNDAY}, |
| ) |
| |
| # Run empty_task_1 if branch executes on Monday, empty_task_2 otherwise |
| branch >> [empty_task_1, empty_task_2] |
| # Run empty_task_3 if it's a weekend, empty_task_4 otherwise |
| empty_task_2 >> branch_weekend >> [empty_task_3, empty_task_4] |
| # [END howto_operator_day_of_week_branch] |