Source code for airflow.example_dags.example_setup_teardown

#
# 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 setup and teardown tasks."""
from __future__ import annotations

import pendulum

from airflow.models.dag import DAG
from airflow.operators.bash import BashOperator
from airflow.settings import _ENABLE_AIP_52
from airflow.utils.task_group import TaskGroup

if _ENABLE_AIP_52:
    with DAG(
        dag_id="example_setup_teardown",
        start_date=pendulum.datetime(2021, 1, 1, tz="UTC"),
        catchup=False,
        tags=["example"],
    ) as dag:
        BashOperator.as_setup(task_id="root_setup", bash_command="echo 'Hello from root_setup'")
[docs]        normal = BashOperator(task_id="normal", bash_command="echo 'I am just a normal task'")
        BashOperator.as_teardown(task_id="root_teardown", bash_command="echo 'Goodbye from root_teardown'")

        with TaskGroup("section_1") as section_1:
            BashOperator.as_setup(task_id="taskgroup_setup", bash_command="echo 'Hello from taskgroup_setup'")
            BashOperator(task_id="normal", bash_command="echo 'I am just a normal task'")
            BashOperator.as_setup(
                task_id="taskgroup_teardown", bash_command="echo 'Hello from taskgroup_teardown'"
            )

        normal >> section_1