airflow pipe_callback_sink 源码
airflow pipe_callback_sink 代码
文件路径：/airflow/callbacks/pipe_callback_sink.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 multiprocessing.connection import Connection as MultiprocessingConnection
from typing import Callable
from airflow.callbacks.base_callback_sink import BaseCallbackSink
from airflow.callbacks.callback_requests import CallbackRequest
class PipeCallbackSink(BaseCallbackSink):
"""
Class for sending callbacks to DagProcessor using pipe.
It is used when DagProcessor is not executed in standalone mode.
"""
def __init__(self, get_sink_pipe: Callable[[], MultiprocessingConnection]):
self._get_sink_pipe = get_sink_pipe
def send(self, callback: CallbackRequest):
"""
Sends information about the callback to be executed by Pipe.
:param callback: Callback request to be executed.
"""
try:
self._get_sink_pipe().send(callback)
except ConnectionError:
# If this died cos of an error then we will noticed and restarted
# when harvest_serialized_dags calls _heartbeat_manager.
pass
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