Mediator pattern impl
Project description
Description
Mediator pattern impl
Docs
Available
- Dispatchers:
- Command
- Query
- Observers:
- Event
- Entities:
- Command
- Event
- Query
- Middlewares:
- Middleware
Usecases
Command/Event/Query
from dataclasses import dataclass
from meator.dispatchers import CommandDispatcherImpl
from meator.entities import Command
from meator.interfaces.handlers import ICommandHandler
@dataclass
class IntCommand(Command[int]):
answer: int
class IntCommandHandler(ICommandHandler[IntCommand, int]):
async def __call__(self, request: IntCommand) -> int:
return request.answer
async def main():
c = CommandDispatcherImpl()
c.register(IntCommand, IntCommandHandler())
await c.handle(IntCommand(1))
Middleware
from dataclasses import dataclass
from meator.dispatchers import CommandDispatcherImpl
from meator.entities import Command, Request
from meator.interfaces.handlers import ICommandHandler
from meator.middlewares.base import Middleware
class SimpleMiddleware(Middleware):
async def __call__(self, request: Request):
return await self.call_next(request)
@dataclass
class IntCommand(Command[int]):
answer: int
class IntCommandHandler(ICommandHandler[IntCommand, int]):
async def __call__(self, request: IntCommand) -> int:
return request.answer
async def main():
c = CommandDispatcherImpl(middlewares=[SimpleMiddleware])
c.register(IntCommand, IntCommandHandler())
await c.handle(IntCommand(1))
Tests
pytest tests
Additional
Inspired by didator
Project details
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