design-patterns/behavioral/chain_responsibility/handler.py
Ruidy 912226c9a9
Chain of Responsibility (#15)
* chore: create behavioral design patterns package

* doc: add chain of responsibility documentation

* doc: add behavioral package table of content

* doc: edit general doc

* add code example

Co-authored-by: Ruidy <r.nemausat@empfohlen.de>
2020-09-30 14:12:08 +02:00

19 lines
452 B
Python

from __future__ import annotations
from abc import ABC, abstractmethod
from typing import Optional, Any
class Handler(ABC):
"""
The Handler interface declares a method for building the chain of handlers.
It also declares a method for executing a request.
"""
@abstractmethod
def set_next(self, handler: Handler) -> Handler:
pass
@abstractmethod
def handle(self, request: Any) -> Optional[str]:
pass