airflow time_sensor 源码
airflow time_sensor 代码
文件路径：/airflow/sensors/time_sensor.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
import datetime
from airflow.sensors.base import BaseSensorOperator
from airflow.triggers.temporal import DateTimeTrigger
from airflow.utils import timezone
from airflow.utils.context import Context
class TimeSensor(BaseSensorOperator):
"""
Waits until the specified time of the day.
:param target_time: time after which the job succeeds
"""
def __init__(self, *, target_time, **kwargs):
super().__init__(**kwargs)
self.target_time = target_time
def poke(self, context: Context):
self.log.info('Checking if the time (%s) has come', self.target_time)
return timezone.make_naive(timezone.utcnow(), self.dag.timezone).time() > self.target_time
class TimeSensorAsync(BaseSensorOperator):
"""
Waits until the specified time of the day, freeing up a worker slot while
it is waiting.
:param target_time: time after which the job succeeds
"""
def __init__(self, *, target_time, **kwargs):
super().__init__(**kwargs)
self.target_time = target_time
aware_time = timezone.coerce_datetime(
datetime.datetime.combine(datetime.datetime.today(), self.target_time)
)
self.target_datetime = timezone.convert_to_utc(aware_time)
def execute(self, context: Context):
self.defer(
trigger=DateTimeTrigger(moment=self.target_datetime),
method_name="execute_complete",
)
def execute_complete(self, context, event=None):
"""Callback for when the trigger fires - returns immediately."""
return None
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