39 строки
1.4 KiB
Python
39 строки
1.4 KiB
Python
#
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# Licensed to the Apache Software Foundation (ASF) under one
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# or more contributor license agreements. See the NOTICE file
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# distributed with this work for additional information
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# regarding copyright ownership. The ASF licenses this file
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# to you under the Apache License, Version 2.0 (the
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# "License"); you may not use this file except in compliance
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# with the License. You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing,
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# software distributed under the License is distributed on an
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# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
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# KIND, either express or implied. See the License for the
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# specific language governing permissions and limitations
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# under the License.
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import multiprocessing
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from airflow.configuration import conf
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class MultiprocessingStartMethodMixin:
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"""Convenience class to add support for different types of multiprocessing."""
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def _get_multiprocessing_start_method(self) -> str:
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"""
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Determine method of creating new processes by checking if the
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mp_start_method is set in configs, else, it uses the OS default.
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"""
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if conf.has_option('core', 'mp_start_method'):
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return conf.get('core', 'mp_start_method')
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method = multiprocessing.get_start_method()
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if not method:
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raise ValueError("Failed to determine start method")
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return method
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