airflow example_time_delta_sensor_async 源码

  • 2022-10-20
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airflow example_time_delta_sensor_async 代码

文件路径:/airflow/example_dags/example_time_delta_sensor_async.py

#
# 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 ``TimeDeltaSensorAsync``, a drop in replacement for ``TimeDeltaSensor`` that
defers and doesn't occupy a worker slot while it waits
"""
from __future__ import annotations

import datetime

import pendulum

from airflow import DAG
from airflow.operators.empty import EmptyOperator
from airflow.sensors.time_delta import TimeDeltaSensorAsync

with DAG(
    dag_id="example_time_delta_sensor_async",
    schedule=None,
    start_date=pendulum.datetime(2021, 1, 1, tz="UTC"),
    catchup=False,
    tags=["example"],
) as dag:
    wait = TimeDeltaSensorAsync(task_id="wait", delta=datetime.timedelta(seconds=10))
    finish = EmptyOperator(task_id="finish")
    wait >> finish

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