SILVANUS

The simple library for different routing with a tree-like structure

Implementation example

Silvanus is created as a low-level library that simplifies the construction of productive, user-friendly, functional and customizable frameworks on top of. These can be different options (data buses, web, etc.), therefore, for an example of how it might look, there is silvahttp.

Paradigms:

• Each element is changeable almost beyond recognition, but a combination of them is possible due to common protocols that are well described out of the box.
• Many things are done out of the box (for example, the almost universal SimpleRouter and its two RouterIterators, which implement both the data queue interface with filters and the data bus interface with filters )
• The most universal protocols, which is why it is recommended to write small wrappers on top of routing for frameworks.

Usage

First:

pip install silvanus

Later:

data queue interface with filters using FirstTrueRouterIterator, and data bus interface with filters using AllTrueRouterIterator

import asyncio
from dataclasses import dataclass

from silvanus.routing.simple import SimpleRouter
from silvanus.strategy.routers import FirstTrueRouterIterator, AllTrueRouterIterator
from silvanus.structures import RoutingData


@dataclass(frozen=True)
class SimpleFilter: # Our custom simple filter
    value: int
    
    async def __call__(self, data: RoutingData) -> bool:
        return data.request_data.get("value", None) == self.value
    
    
# silvanus supports all data types as a result of routing, 
# but the most useful for frameworks will be the return of functions.
def some_handler(text: str) -> str:
    return text * 2


router = SimpleRouter()

router1 = SimpleRouter([SimpleFilter(value=10)], data="wrong")

router2 = SimpleRouter([SimpleFilter(value=15), ], data=some_handler)
router3 = SimpleRouter([SimpleFilter(value=15), ], data="yes!")

router.add_routers([router1, router2, router3])

async def main():
    result = await router.route(
        data=RoutingData(
            request_data={"value": 15}
        ),
        iterator=FirstTrueRouterIterator() # get only first True result 
    )
    
    assert result("silvanus-") == "silvanus-silvanus-" # our some_handler
    
    result_2 = await router.route(
        data=RoutingData(
            request_data={"value": 15}
        ),
        iterator=AllTrueRouterIterator() # get all True result 
    )
    
    assert result_2[0](result_2[1]) == "yes!yes!" # our some_handler and text from second data 

asyncio.run(main())

Examples:

• html integration example