blob: 30eac0abf374584c01fd30a441757053dd46d5ad (
plain) (
blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
|
from abc import ABCMeta, abstractmethod
from .exceptions import HydroError
from .typing import Dict, Callable
__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(metaclass=ABCMeta):
"""规则包业务基类"""
name: str
priority: int = 0
def __init_subclass__(cls) -> None:
handlers.regist(cls.name, cls.process)
@abstractmethod
def process(self) -> Result:
raise NotImplementedError
class Handlers:
"""规则包业务集合"""
_handlers: Dict[str, Callable] = {}
def regist(self, name: str, handler: Callable) -> None:
self._handlers[name.lower()] = handler
def match(self, name: str) -> Callable | None:
return self._handlers.get(name.lower())
handlers = Handlers()
|