airflow event_scheduler 源码
airflow event_scheduler 代码
文件路径：/airflow/utils/event_scheduler.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.
from __future__ import annotations
from sched import scheduler
from typing import Callable
class EventScheduler(scheduler):
"""General purpose event scheduler"""
def call_regular_interval(
self,
delay: float,
action: Callable,
arguments=(),
kwargs={},
):
"""Helper to call a function at (roughly) a given interval"""
def repeat(*args, **kwargs):
action(*args, **kwargs)
# This is not perfect. If we want a timer every 60s, but action
# takes 10s to run, this will run it every 70s.
# Good enough for now
self.enter(delay, 1, repeat, args, kwargs)
self.enter(delay, 1, repeat, arguments, kwargs)
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