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- # -*- coding: utf-8 -*-
- # (c) Nelen & Schuurmans
- from abc import ABC
- from typing import Awaitable, Callable, TypeVar
- import blinker
- __all__ = ["DomainEvent"]
- TDomainEvent = TypeVar("TDomainEvent", bound="DomainEvent")
- TEventHandler = Callable[[TDomainEvent], Awaitable[None]]
- class DomainEvent(ABC):
- @classmethod
- def _signal(cls) -> blinker.Signal:
- return blinker.signal(cls.__name__)
- @classmethod
- def register_handler(cls, receiver: TEventHandler) -> TEventHandler:
- return cls._signal().connect(receiver)
- async def send_async(self) -> None:
- await self._signal().send_async(self)
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