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76 lines
2.1 KiB
76 lines
2.1 KiB
#
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# Copyright 2025 Splunk Inc.
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# 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, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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#
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"""A wrapper of multiprocessing.pool."""
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import multiprocessing
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import logging
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class ProcessPool:
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"""A simple wrapper of multiprocessing.pool."""
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def __init__(self, size=0, maxtasksperchild=10000):
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if size <= 0:
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size = multiprocessing.cpu_count()
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self.size = size
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self._pool = multiprocessing.Pool(
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processes=size, maxtasksperchild=maxtasksperchild
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)
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self._stopped = False
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def tear_down(self):
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"""Tear down the pool."""
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if self._stopped:
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logging.info("ProcessPool has already stopped.")
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return
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self._stopped = True
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self._pool.close()
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self._pool.join()
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logging.info("ProcessPool stopped.")
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def apply(self, func, args=(), kwargs={}):
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"""
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:param func: callable
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:param args: free params
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:param kwargs: named params
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:return whatever the func returns
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"""
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if self._stopped:
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logging.info("ProcessPool has already stopped.")
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return None
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return self._pool.apply(func, args, kwargs)
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def apply_async(self, func, args=(), kwargs={}, callback=None):
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"""
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:param func: callable
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:param args: free params
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:param kwargs: named params
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:callback: when func is done without exception, call this callack
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:return whatever the func returns
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"""
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if self._stopped:
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logging.info("ProcessPool has already stopped.")
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return None
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return self._pool.apply_async(func, args, kwargs, callback)
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