mirror of
https://github.com/Monadical-SAS/reflector.git
synced 2025-12-20 12:19:06 +00:00
74 lines
1.9 KiB
Python
74 lines
1.9 KiB
Python
"""
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Utility file for server side asynchronous task running and config objects
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"""
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import asyncio
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import configparser
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import contextlib
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from functools import partial
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from threading import Lock
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from typing import ContextManager, Generic, TypeVar
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class ReflectorConfig:
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"""
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Create a single config object to share across the project
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"""
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__config = None
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@staticmethod
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def get_config():
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if ReflectorConfig.__config is None:
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ReflectorConfig.__config = configparser.ConfigParser()
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ReflectorConfig.__config.read('utils/config.ini')
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return ReflectorConfig.__config
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CONFIG = ReflectorConfig.get_config()
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def run_in_executor(func, *args, executor=None, **kwargs):
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"""
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Run the function in an executor, unblocking the main loop
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:param func: Function to be run in executor
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:param args: function parameters
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:param executor: executor instance [Thread | Process]
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:param kwargs: Additional parameters
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:return: Future of function result upon completion
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"""
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callback = partial(func, *args, **kwargs)
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loop = asyncio.get_event_loop()
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return loop.run_in_executor(executor, callback)
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# Genetic type template
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T = TypeVar("T")
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class Mutex(Generic[T]):
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"""
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Mutex class to implement lock/release of a shared
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protected variable
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"""
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def __init__(self, value: T):
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"""
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Create an instance of Mutex wrapper for the given resource
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:param value: Shared resources to be thread protected
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"""
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self.__value = value
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self.__lock = Lock()
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@contextlib.contextmanager
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def lock(self) -> ContextManager[T]:
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"""
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Lock the resource with a mutex to be used within a context block
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The lock is automatically released on context exit
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:return: Shared resource
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"""
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self.__lock.acquire()
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try:
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yield self.__value
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finally:
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self.__lock.release()
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