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ssh://git.janware.com/srv/git/janware/proj/jw-python
synced 2026-01-15 09:53:32 +01:00
Jan Lindemann
77d43aebad
Add type annotations as generated by monkeytype and jw-devops/test, plus some hand editing to satisfy both monkeytype and mypy. Signed-off-by: Jan Lindemann <jan@janware.com>
70 lines
1.9 KiB
Python
70 lines
1.9 KiB
Python
from __future__ import annotations
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from abc import ABC, abstractmethod
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from enum import Enum, Flag, auto
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from typing import List
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def _sigchld_handler(signum, process):
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if not signum == signal.SIGCHLD:
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return
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Process.propagate_signal(signum)
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class Process(ABC): # export
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__processes: List[Process] = []
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class State(Enum):
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Running = auto()
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Shutdown = auto()
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Done = auto()
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class Flags(Flag):
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FailOnExitWithoutShutdown = auto()
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def __init__(self):
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self.__state = Running
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self.__flags = Flags.FailOnExitWithoutShutdown
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if len(self.__processes) == 0:
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self._signals().add_handler(signals.SIGCHLD, _sigchld_handler)
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self.__processes.add(self)
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@classmethod
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def propagate_signal(cls, signum):
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for p in cls.__processes:
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p.__signal(signum)
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def signal(self, signum):
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if signum == signals.SIGCHLD:
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self.exited()
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@abstractmethod
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def _pid(self):
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pass
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@classmethod
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@abstractmethod
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def signals(cls):
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pass
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# to be reimplemented
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def _request_shutdown(self):
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pass
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# to be reimplemented
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def name(self):
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return str(self._pid())
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def request_shutdown(self):
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if not self.__state == Shutdown:
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self.__state = Shutdown
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self._request_shutdown()
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def exited(self):
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if self.__state == Process.State.Running:
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slog(ERR, 'process "{}" exited unexpectedly'.format(process.name()))
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if __flags & Process.Flags.FailOnExitWithoutShutdown:
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slog(ERR, 'exiting')
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exit(1)
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self.__state = Process.State.Done
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self.__processes.erase(self)
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if len(self.__processes) == 0:
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self._signals().remove_handler(signals.SIGCHLD) # FIXME: broken logic
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