Source code for airflow.example_dags.example_setup_teardown_taskflow

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"""Example DAG demonstrating the usage of setup and teardown tasks."""
from __future__ import annotations

import pendulum

from airflow.decorators import setup, task, task_group, teardown
from airflow.models.dag import DAG
from airflow.settings import _ENABLE_AIP_52

if _ENABLE_AIP_52:
    with DAG(
        dag_id="example_setup_teardown_taskflow",
        start_date=pendulum.datetime(2021, 1, 1, tz="UTC"),
        catchup=False,
        tags=["example"],
    ) as dag:
        # You can use the setup and teardown decorators to add setup and teardown tasks at the DAG level
        @setup
        @task
[docs]        def root_setup():
            print("Hello from root_setup")

        @teardown
        @task
        def root_teardown():
            print("Goodbye from root_teardown")

        @task
        def normal():
            print("I am just a normal task")

        @task_group
        def section_1():
            # You can also have setup and teardown tasks at the task group level
            @setup
            @task
            def my_setup():
                print("I set up")

            @teardown
            @task
            def my_teardown():
                print("I tear down")

            @task
            def hello():
                print("I say hello")

            my_setup()
            hello()
            my_teardown()

        root_setup()
        normal() >> section_1()
        root_teardown()