A fAST new router

Moving forward
#41

Here is a super simple implementation of the new router as the beginning of the signals API:

from sanic_routing import BaseRouter, Route


class Signal(Route):
    def get_handler(self, raw_path, method, _):
        method = method or self.router.DEFAULT_METHOD
        raw_path = raw_path.lstrip(self.router.delimiter)
        try:
            return self.handlers[raw_path][method]
        except (IndexError, KeyError):
            raise self.router.method_handler_exception(
                f"Method '{method}' not found on {self}",
                method=method,
                allowed_methods=set(self.methods[raw_path]),
            )


class SignalRouter(BaseRouter):
    def __init__(self) -> None:
        super().__init__(
            delimiter=".",
            route_class=Signal,
            stacking=True,
        )

    def get(self, event: str):
        return self.resolve(f".{event}")

    def send(self, event: str) -> None:
        signal, handlers, params = self.get(event)
        for handler in handlers:
            handler(**params)


def callback1():
    print("called1")


def callback2():
    print("called2")


signals = SignalRouter()
signals.add("server.init.before", callback1)
signals.add("server.init.before", callback2)

signals.finalize()

signals.send("server.init.before")

See RFC : Signals Support for Sanic Proposal · Issue #1630 · sanic-org/sanic · GitHub

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