Update app.event() to return context dict (#2088), and only fire for the specific requested event (#2826).
Also added support for passing conditions= and exclusive= arguments to app.event().
This commit is contained in:
Josh Bartlett
parent
a5a9658896
commit
4d0a0a3570
23
sanic/app.py
23
sanic/app.py
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@ -17,6 +17,7 @@ from asyncio import (
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from asyncio.futures import Future
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from collections import defaultdict, deque
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from contextlib import contextmanager, suppress
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from enum import Enum
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from functools import partial, wraps
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from inspect import isawaitable
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from os import environ
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@ -663,7 +664,12 @@ class Sanic(
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)
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async def event(
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self, event: str, timeout: Optional[Union[int, float]] = None
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self,
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event: Union[str, Enum],
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timeout: Optional[Union[int, float]] = None,
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*,
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condition: Optional[Dict[str, Any]] = None,
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exclusive: bool = True,
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) -> None:
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"""Wait for a specific event to be triggered.
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@ -686,13 +692,18 @@ class Sanic(
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timeout (Optional[Union[int, float]]): An optional timeout value
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in seconds. If provided, the wait will be terminated if the
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timeout is reached. Defaults to `None`, meaning no timeout.
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condition: If provided, method will only return when the signal
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is dispatched with the given condition.
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exclusive: When true (default), the signal can only be dispatched
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when the condition has been met. When ``False``, the signal can
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be dispatched either with or without it.
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Raises:
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NotFound: If the event is not found and auto-registration of
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events is not enabled.
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Returns:
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None
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The context dict of the dispatched signal.
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Examples:
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```python
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@ -708,16 +719,16 @@ class Sanic(
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```
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"""
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signal = self.signal_router.name_index.get(event)
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if not signal:
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waiter = self.signal_router.get_waiter(event, condition, exclusive)
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if not waiter:
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if self.config.EVENT_AUTOREGISTER:
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self.signal_router.reset()
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self.add_signal(None, event)
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signal = self.signal_router.name_index[event]
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waiter = self.signal_router.get_waiter(event, condition, exclusive)
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self.signal_router.finalize()
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else:
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raise NotFound("Could not find signal %s" % event)
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return await wait_for(signal.ctx.event.wait(), timeout=timeout)
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return await wait_for(waiter.wait(), timeout=timeout)
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def report_exception(
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self, handler: Callable[[Sanic, Exception], Coroutine[Any, Any, None]]
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@ -512,33 +512,54 @@ class Blueprint(BaseSanic):
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condition = kwargs.pop("condition", {})
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condition.update({"__blueprint__": self.name})
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kwargs["condition"] = condition
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await asyncio.gather(
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return await asyncio.gather(
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*[app.dispatch(*args, **kwargs) for app in self.apps]
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)
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def event(self, event: str, timeout: Optional[Union[int, float]] = None):
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def event(
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self,
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event: str,
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timeout: Optional[Union[int, float]] = None,
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*,
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condition: Optional[Dict[str, Any]] = None,
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):
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"""Wait for a signal event to be dispatched.
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Args:
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event (str): Name of the signal event.
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timeout (Optional[Union[int, float]]): Timeout for the event to be
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dispatched.
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condition: If provided, method will only return when the signal
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is dispatched with the given condition.
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Returns:
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Awaitable: Awaitable for the event to be dispatched.
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"""
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events = set()
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for app in self.apps:
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signal = app.signal_router.name_index.get(event)
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if not signal:
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raise NotFound("Could not find signal %s" % event)
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events.add(signal.ctx.event)
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if condition is None:
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condition = {}
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condition.update({"__blueprint__": self.name})
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return asyncio.wait(
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[asyncio.create_task(event.wait()) for event in events],
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waiters = []
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for app in self.apps:
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waiter = app.signal_router.get_waiter(event, condition, exclusive=False)
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if not waiter:
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raise NotFound("Could not find signal %s" % event)
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waiters.append(waiter)
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return self._event(waiters, timeout)
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async def _event(self, waiters, timeout):
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done, pending = await asyncio.wait(
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[asyncio.create_task(waiter.wait()) for waiter in waiters],
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return_when=asyncio.FIRST_COMPLETED,
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timeout=timeout,
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)
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for task in pending:
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task.cancel()
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if not done:
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raise TimeoutError()
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finished_task, = done
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return finished_task.result()
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@staticmethod
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def _extract_value(*values):
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@ -88,7 +88,7 @@ class SignalMixin(metaclass=SanicMeta):
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"""
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if not handler:
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async def noop():
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async def noop(**context):
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...
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handler = noop
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@ -2,6 +2,8 @@ from __future__ import annotations
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import asyncio
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from collections import deque
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from dataclasses import dataclass
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from enum import Enum
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from inspect import isawaitable
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from typing import Any, Dict, List, Optional, Tuple, Union, cast
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@ -76,6 +78,38 @@ class Signal(Route):
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"""A `Route` that is used to dispatch signals to handlers"""
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@dataclass
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class SignalWaiter:
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"""A record representing a future waiting for a signal"""
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signal: Signal
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event_definition: str
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trigger: str = ""
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requirements: Optional[Dict[str, str]] = None
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exclusive: bool = True
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future: Optional[asyncio.Future] = None
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async def wait(self):
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"""Block until the signal is next dispatched.
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Return the context of the signal dispatch, if any.
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"""
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loop = asyncio.get_running_loop()
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self.future = loop.create_future()
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self.signal.ctx.waiters.append(self)
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try:
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return await self.future
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finally:
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self.signal.ctx.waiters.remove(self)
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def matches(self, event, condition):
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return ((condition is None and not self.exclusive)
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or (condition is None and not self.requirements)
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or condition == self.requirements
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) and (self.trigger or event == self.event_definition)
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class SignalGroup(RouteGroup):
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"""A `RouteGroup` that is used to dispatch signals to handlers"""
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@ -160,18 +194,20 @@ class SignalRouter(BaseRouter):
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error_logger.warning(str(e))
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return None
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events = [signal.ctx.event for signal in group]
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for signal_event in events:
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signal_event.set()
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if context:
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params.update(context)
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params.pop("__trigger__", None)
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signals = group.routes
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if not reverse:
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signals = signals[::-1]
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try:
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for signal in signals:
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params.pop("__trigger__", None)
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for waiter in signal.ctx.waiters:
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if waiter.matches(event, condition):
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waiter.future.set_result(dict(params))
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for signal in signals:
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requirements = signal.extra.requirements
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if (
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(condition is None and signal.ctx.exclusive is False)
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@ -197,9 +233,6 @@ class SignalRouter(BaseRouter):
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)
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setattr(e, "__dispatched__", True)
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raise e
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finally:
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for signal_event in events:
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signal_event.clear()
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async def dispatch(
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self,
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@ -244,14 +277,29 @@ class SignalRouter(BaseRouter):
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await asyncio.sleep(0)
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return task
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def add( # type: ignore
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def get_waiter(
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self,
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handler: SignalHandler,
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event: str,
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condition: Optional[Dict[str, Any]] = None,
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exclusive: bool = True,
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) -> Signal:
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event_definition = event
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event: Union[str, Enum],
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condition: Optional[Dict[str, Any]],
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exclusive: bool,
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):
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event_definition = str(event.value) if isinstance(event, Enum) else event
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name, trigger, _ = self._get_event_parts(event_definition)
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signal = cast(Signal, self.name_index.get(name))
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if not signal:
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return None
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if event_definition.endswith(".*") and not trigger:
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trigger = "*"
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return SignalWaiter(
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signal=signal,
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event_definition=event_definition,
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trigger=trigger,
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requirements=condition,
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exclusive=bool(exclusive),
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)
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def _get_event_parts(self, event):
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parts = self._build_event_parts(event)
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if parts[2].startswith("<"):
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name = ".".join([*parts[:-1], "*"])
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@ -263,6 +311,18 @@ class SignalRouter(BaseRouter):
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if not trigger:
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event = ".".join([*parts[:2], "<__trigger__>"])
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return name, trigger, event
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def add( # type: ignore
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self,
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handler: SignalHandler,
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event: str,
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condition: Optional[Dict[str, Any]] = None,
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exclusive: bool = True,
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) -> Signal:
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event_definition = event
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name, trigger, event = self._get_event_parts(event)
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signal = super().add(
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event,
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handler,
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@ -298,7 +358,7 @@ class SignalRouter(BaseRouter):
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raise RuntimeError("Cannot finalize signals outside of event loop")
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for signal in self.routes:
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signal.ctx.event = asyncio.Event()
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signal.ctx.waiters = deque()
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return super().finalize(do_compile=do_compile, do_optimize=do_optimize)
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@ -78,6 +78,49 @@ def test_invalid_signal(app, signal):
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...
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@pytest.mark.asyncio
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async def test_dispatch_signal_triggers_event(app):
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@app.signal("foo.bar.baz")
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def sync_signal(*args):
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pass
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app.signal_router.finalize()
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event_task = asyncio.create_task(app.event("foo.bar.baz"))
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await app.dispatch("foo.bar.baz")
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await asyncio.sleep(0)
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assert event_task.done()
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event_task.result() # Will raise if there was an exception
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@pytest.mark.asyncio
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async def test_dispatch_signal_triggers_correct_event(app):
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# Check for https://github.com/sanic-org/sanic/issues/2826
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@app.signal("foo.bar.baz")
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def sync_signal(*args):
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pass
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@app.signal("foo.bar.spam")
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def sync_signal(*args):
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pass
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app.signal_router.finalize()
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baz_task = asyncio.create_task(app.event("foo.bar.baz"))
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spam_task = asyncio.create_task(app.event("foo.bar.spam"))
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await app.dispatch("foo.bar.baz")
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await asyncio.sleep(0)
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assert baz_task.done()
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assert not spam_task.done()
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baz_task.result()
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spam_task.cancel()
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@pytest.mark.asyncio
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async def test_dispatch_signal_with_enum_event(app):
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counter = 0
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@ -97,6 +140,26 @@ async def test_dispatch_signal_with_enum_event(app):
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assert counter == 1
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@pytest.mark.asyncio
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async def test_dispatch_signal_with_enum_event_to_event(app):
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class FooEnum(Enum):
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FOO_BAR_BAZ = "foo.bar.baz"
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@app.signal(FooEnum.FOO_BAR_BAZ)
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def sync_signal(*args):
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pass
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app.signal_router.finalize()
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event_task = asyncio.create_task(app.event(FooEnum.FOO_BAR_BAZ))
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await app.dispatch("foo.bar.baz")
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await asyncio.sleep(0)
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assert event_task.done()
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event_task.result() # Will raise if there was an exception
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@pytest.mark.asyncio
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async def test_dispatch_signal_triggers_multiple_handlers(app):
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counter = 0
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@ -121,22 +184,45 @@ async def test_dispatch_signal_triggers_multiple_handlers(app):
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@pytest.mark.asyncio
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async def test_dispatch_signal_triggers_triggers_event(app):
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counter = 0
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async def test_dispatch_signal_triggers_multiple_events(app):
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@app.signal("foo.bar.baz")
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def sync_signal(*args):
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nonlocal app
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nonlocal counter
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group, *_ = app.signal_router.get("foo.bar.baz")
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for signal in group:
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counter += signal.ctx.event.is_set()
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def sync_signal(*_):
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pass
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app.signal_router.finalize()
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await app.dispatch("foo.bar.baz")
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event_task1 = asyncio.create_task(app.event("foo.bar.baz"))
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event_task2 = asyncio.create_task(app.event("foo.bar.baz"))
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assert counter == 1
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await app.dispatch("foo.bar.baz")
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await asyncio.sleep(0)
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assert event_task1.done()
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assert event_task2.done()
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event_task1.result() # Will raise if there was an exception
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event_task2.result() # Will raise if there was an exception
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@pytest.mark.asyncio
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async def test_dispatch_signal_with_multiple_handlers_triggers_event_once(app):
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@app.signal("foo.bar.baz")
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def sync_signal(*_):
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pass
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@app.signal("foo.bar.baz")
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async def async_signal(*_):
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pass
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app.signal_router.finalize()
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event_task = asyncio.create_task(app.event("foo.bar.baz"))
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await app.dispatch("foo.bar.baz")
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await asyncio.sleep(0)
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assert event_task.done()
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event_task.result() # Will raise if there was an exception
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@pytest.mark.asyncio
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@ -155,6 +241,40 @@ async def test_dispatch_signal_triggers_dynamic_route(app):
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assert counter == 9
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@pytest.mark.asyncio
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async def test_dispatch_signal_triggers_parameterized_dynamic_route_event(app):
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@app.signal("foo.bar.<baz:int>")
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def sync_signal(baz):
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pass
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app.signal_router.finalize()
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event_task = asyncio.create_task(app.event("foo.bar.<baz:int>"))
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await app.dispatch("foo.bar.9")
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await asyncio.sleep(0)
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assert event_task.done()
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event_task.result() # Will raise if there was an exception
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@pytest.mark.asyncio
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async def test_dispatch_signal_triggers_starred_dynamic_route_event(app):
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@app.signal("foo.bar.<baz:int>")
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def sync_signal(baz):
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pass
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app.signal_router.finalize()
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event_task = asyncio.create_task(app.event("foo.bar.*"))
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await app.dispatch("foo.bar.9")
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await asyncio.sleep(0)
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assert event_task.done()
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event_task.result() # Will raise if there was an exception
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@pytest.mark.asyncio
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async def test_dispatch_signal_triggers_with_requirements(app):
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counter = 0
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|
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@ -172,6 +292,26 @@ async def test_dispatch_signal_triggers_with_requirements(app):
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assert counter == 1
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@pytest.mark.asyncio
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async def test_dispatch_signal_to_event_with_requirements(app):
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@app.signal("foo.bar.baz")
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def sync_signal(*_):
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pass
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app.signal_router.finalize()
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event_task = asyncio.create_task(app.event("foo.bar.baz", condition={"one": "two"}))
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await app.dispatch("foo.bar.baz")
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await asyncio.sleep(0)
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assert not event_task.done()
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await app.dispatch("foo.bar.baz", condition={"one": "two"})
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await asyncio.sleep(0)
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assert event_task.done()
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event_task.result() # Will raise if there was an exception
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@pytest.mark.asyncio
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async def test_dispatch_signal_triggers_with_requirements_exclusive(app):
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counter = 0
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|
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@ -189,6 +329,28 @@ async def test_dispatch_signal_triggers_with_requirements_exclusive(app):
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assert counter == 2
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@pytest.mark.asyncio
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async def test_dispatch_signal_to_event_with_requirements_exclusive(app):
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@app.signal("foo.bar.baz")
|
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def sync_signal(*_):
|
||||
pass
|
||||
|
||||
app.signal_router.finalize()
|
||||
|
||||
event_task = asyncio.create_task(app.event("foo.bar.baz", condition={"one": "two"}, exclusive=False))
|
||||
await app.dispatch("foo.bar.baz")
|
||||
await asyncio.sleep(0)
|
||||
assert event_task.done()
|
||||
event_task.result() # Will raise if there was an exception
|
||||
|
||||
event_task = asyncio.create_task(app.event("foo.bar.baz", condition={"one": "two"}, exclusive=False))
|
||||
await app.dispatch("foo.bar.baz", condition={"one": "two"})
|
||||
await asyncio.sleep(0)
|
||||
assert event_task.done()
|
||||
event_task.result() # Will raise if there was an exception
|
||||
|
||||
|
||||
@pytest.mark.asyncio
|
||||
async def test_dispatch_signal_triggers_with_context(app):
|
||||
counter = 0
|
||||
|
|
@ -204,6 +366,22 @@ async def test_dispatch_signal_triggers_with_context(app):
|
|||
assert counter == 9
|
||||
|
||||
|
||||
@pytest.mark.asyncio
|
||||
async def test_dispatch_signal_to_event_with_context(app):
|
||||
|
||||
@app.signal("foo.bar.baz")
|
||||
def sync_signal(**context):
|
||||
pass
|
||||
|
||||
app.signal_router.finalize()
|
||||
|
||||
event_task = asyncio.create_task(app.event("foo.bar.baz"))
|
||||
await app.dispatch("foo.bar.baz", context={"amount": 9})
|
||||
await asyncio.sleep(0)
|
||||
assert event_task.done()
|
||||
assert event_task.result()['amount'] == 9
|
||||
|
||||
|
||||
@pytest.mark.asyncio
|
||||
async def test_dispatch_signal_triggers_with_context_fail(app):
|
||||
counter = 0
|
||||
|
|
@ -219,6 +397,22 @@ async def test_dispatch_signal_triggers_with_context_fail(app):
|
|||
await app.dispatch("foo.bar.baz", {"amount": 9})
|
||||
|
||||
|
||||
@pytest.mark.asyncio
|
||||
async def test_dispatch_signal_to_dynamic_route_event(app):
|
||||
|
||||
@app.signal("foo.bar.<something>")
|
||||
def sync_signal(**context):
|
||||
pass
|
||||
|
||||
app.signal_router.finalize()
|
||||
|
||||
event_task = asyncio.create_task(app.event("foo.bar.<something>"))
|
||||
await app.dispatch("foo.bar.baz")
|
||||
await asyncio.sleep(0)
|
||||
assert event_task.done()
|
||||
assert event_task.result()['something'] == "baz"
|
||||
|
||||
|
||||
@pytest.mark.asyncio
|
||||
async def test_dispatch_signal_triggers_on_bp(app):
|
||||
bp = Blueprint("bp")
|
||||
|
|
@ -267,61 +461,67 @@ async def test_dispatch_signal_triggers_on_bp_alone(app):
|
|||
|
||||
|
||||
@pytest.mark.asyncio
|
||||
async def test_dispatch_signal_triggers_event(app):
|
||||
app_counter = 0
|
||||
async def test_dispatch_signal_triggers_event_on_bp(app):
|
||||
bp = Blueprint("bp")
|
||||
|
||||
@app.signal("foo.bar.baz")
|
||||
def app_signal():
|
||||
...
|
||||
|
||||
async def do_wait():
|
||||
nonlocal app_counter
|
||||
await app.event("foo.bar.baz")
|
||||
app_counter += 1
|
||||
@bp.signal("foo.bar.baz")
|
||||
def bp_signal():
|
||||
...
|
||||
|
||||
app.blueprint(bp)
|
||||
app.signal_router.finalize()
|
||||
|
||||
app_task = asyncio.create_task(app.event("foo.bar.baz"))
|
||||
bp_task = asyncio.create_task(bp.event("foo.bar.baz"))
|
||||
await asyncio.sleep(0)
|
||||
await app.dispatch("foo.bar.baz")
|
||||
waiter = app.event("foo.bar.baz")
|
||||
assert isawaitable(waiter)
|
||||
|
||||
fut = asyncio.ensure_future(do_wait())
|
||||
await app.dispatch("foo.bar.baz")
|
||||
await fut
|
||||
# Allow a few event loop iterations for tasks to finish
|
||||
for _ in range(5):
|
||||
await asyncio.sleep(0)
|
||||
|
||||
assert app_counter == 1
|
||||
assert app_task.done()
|
||||
assert bp_task.done()
|
||||
app_task.result()
|
||||
bp_task.result()
|
||||
|
||||
app_task = asyncio.create_task(app.event("foo.bar.baz"))
|
||||
bp_task = asyncio.create_task(bp.event("foo.bar.baz"))
|
||||
await asyncio.sleep(0)
|
||||
await bp.dispatch("foo.bar.baz")
|
||||
|
||||
# Allow a few event loop iterations for tasks to finish
|
||||
for _ in range(5):
|
||||
await asyncio.sleep(0)
|
||||
|
||||
assert bp_task.done()
|
||||
assert not app_task.done()
|
||||
bp_task.result()
|
||||
app_task.cancel()
|
||||
|
||||
|
||||
@pytest.mark.asyncio
|
||||
async def test_dispatch_signal_triggers_event_on_bp(app):
|
||||
async def test_dispatch_signal_triggers_event_on_bp_with_context(app):
|
||||
bp = Blueprint("bp")
|
||||
bp_counter = 0
|
||||
|
||||
@bp.signal("foo.bar.baz")
|
||||
def bp_signal():
|
||||
...
|
||||
|
||||
async def do_wait():
|
||||
nonlocal bp_counter
|
||||
await bp.event("foo.bar.baz")
|
||||
bp_counter += 1
|
||||
|
||||
app.blueprint(bp)
|
||||
app.signal_router.finalize()
|
||||
signal_group, *_ = app.signal_router.get(
|
||||
"foo.bar.baz", condition={"blueprint": "bp"}
|
||||
)
|
||||
|
||||
await bp.dispatch("foo.bar.baz")
|
||||
waiter = bp.event("foo.bar.baz")
|
||||
assert isawaitable(waiter)
|
||||
|
||||
fut = do_wait()
|
||||
for signal in signal_group:
|
||||
signal.ctx.event.set()
|
||||
await asyncio.gather(fut)
|
||||
|
||||
assert bp_counter == 1
|
||||
event_task = asyncio.create_task(bp.event("foo.bar.baz"))
|
||||
await asyncio.sleep(0)
|
||||
await app.dispatch("foo.bar.baz", context={"amount": 9})
|
||||
for _ in range(5):
|
||||
await asyncio.sleep(0)
|
||||
assert event_task.done()
|
||||
assert event_task.result()['amount'] == 9
|
||||
|
||||
|
||||
def test_bad_finalize(app):
|
||||
|
|
|
|||
Loading…
Reference in New Issue
Block a user