Source code for airflow.example_dags.example_subdag_operator

#
# 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 SubDagOperator."""

from __future__ import annotations

import warnings

with warnings.catch_warnings():
    warnings.filterwarnings(
        "ignore",
        message=r"This class is deprecated\. Please use `airflow\.utils\.task_group\.TaskGroup`\.",
    )

    # [START example_subdag_operator]
    import datetime

    from airflow.example_dags.subdags.subdag import subdag
    from airflow.models.dag import DAG
    from airflow.operators.empty import EmptyOperator
    from airflow.operators.subdag import SubDagOperator

[docs]    DAG_NAME = "example_subdag_operator"

    with DAG(
        dag_id=DAG_NAME,
        default_args={"retries": 2},
        start_date=datetime.datetime(2022, 1, 1),
        schedule="@once",
        tags=["example"],
    ) as dag:
        start = EmptyOperator(
            task_id="start",
        )

        section_1 = SubDagOperator(
            task_id="section-1",
            subdag=subdag(DAG_NAME, "section-1", dag.default_args),
        )

        some_other_task = EmptyOperator(
            task_id="some-other-task",
        )

        section_2 = SubDagOperator(
            task_id="section-2",
            subdag=subdag(DAG_NAME, "section-2", dag.default_args),
        )

        end = EmptyOperator(
            task_id="end",
        )

        start >> section_1 >> some_other_task >> section_2 >> end
    # [END example_subdag_operator]