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from abc import ABCMeta, abstractmethod
from .exceptions import HydroError
from .typing import Dict
__all__ = ["Result", "Handler"]
class Result(metaclass=ABCMeta):
"""规则包运行结果基类"""
event: str
status: bool
exception: HydroError | None = None
def __init__(
self, event: str, status: bool, exception: HydroError | None = None
) -> None:
self.event = event
self.status = status
self.exception = exception
def ok(self):
"""规则执行期间是否产生异常"""
return isinstance(self.exception, HydroError)
class Handler:
"""规则包业务基类"""
name: str
priority: int = 0
def __init_subclass__(cls) -> None:
handlers.regist(cls.name, cls())
@abstractmethod
def process(self) -> Result:
raise NotImplementedError
class Handlers:
"""规则包业务集合"""
_handlers: Dict[str, Handler] = {}
def regist(self, name: str, handler: Handler) -> None:
self._handlers[name.lower()] = handler
def match(self, name: str) -> Handler | None:
return self._handlers.get(name.lower())
handlers = Handlers()
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