Source code for airflow.example_dags.example_setup_teardown

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"""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.utils.task_group import TaskGroup

with DAG(
    dag_id="example_setup_teardown",
    start_date=pendulum.datetime(2021, 1, 1, tz="UTC"),
    catchup=False,
    tags=["example"],
) as dag:
[docs]    root_setup = BashOperator(task_id="root_setup", bash_command="echo 'Hello from root_setup'").as_setup()
    root_normal = BashOperator(task_id="normal", bash_command="echo 'I am just a normal task'")
    root_teardown = BashOperator(
        task_id="root_teardown", bash_command="echo 'Goodbye from root_teardown'"
    ).as_teardown(setups=root_setup)
    root_setup >> root_normal >> root_teardown
    with TaskGroup("section_1") as section_1:
        inner_setup = BashOperator(
            task_id="taskgroup_setup", bash_command="echo 'Hello from taskgroup_setup'"
        ).as_setup()
        inner_normal = BashOperator(task_id="normal", bash_command="echo 'I am just a normal task'")
        inner_teardown = BashOperator(
            task_id="taskgroup_teardown", bash_command="echo 'Hello from taskgroup_teardown'"
        ).as_teardown(setups=inner_setup)
        inner_setup >> inner_normal >> inner_teardown
    root_normal >> section_1