|
- from __future__ import annotations
-
- import sys
- from collections.abc import Sequence
- from typing import Any, Callable
-
- if sys.version_info >= (3, 10): # pragma: no cover
- from typing import ParamSpec
- else: # pragma: no cover
- from typing_extensions import ParamSpec
-
- from starlette._utils import is_async_callable
- from starlette.concurrency import run_in_threadpool
-
- P = ParamSpec("P")
-
-
- class BackgroundTask:
- def __init__(self, func: Callable[P, Any], *args: P.args, **kwargs: P.kwargs) -> None:
- self.func = func
- self.args = args
- self.kwargs = kwargs
- self.is_async = is_async_callable(func)
-
- async def __call__(self) -> None:
- if self.is_async:
- await self.func(*self.args, **self.kwargs)
- else:
- await run_in_threadpool(self.func, *self.args, **self.kwargs)
-
-
- class BackgroundTasks(BackgroundTask):
- def __init__(self, tasks: Sequence[BackgroundTask] | None = None):
- self.tasks = list(tasks) if tasks else []
-
- def add_task(self, func: Callable[P, Any], *args: P.args, **kwargs: P.kwargs) -> None:
- task = BackgroundTask(func, *args, **kwargs)
- self.tasks.append(task)
-
- async def __call__(self) -> None:
- for task in self.tasks:
- await task()
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