How get application state in periodic task?

[Oleg Korolev]

I need to get app.state to retrieve the Postgres pool driver in my periodic task.
Because task repeating every 5 sec.

How can I do this with the fastapi routing case (when app.state is available only in request object)?

In this example, I'm forced to create gspread and asyncpg connections every 5 seconds this is a terrible decision.

[Oleg Korolev]

solution for synchronous tasks:
using a lambda fundus, you can pass an application object into a recurring task bypassing the limit of fastapi_utils.tasks.NoArgsNoReturnFuncT

import fastapi_utils.tasks
from fastapi import FastAPI

import main_tasks

app = FastAPI()
app.state.db = 'database pool'
app.on_event('startup')(
    fastapi_utils.tasks.repeat_every(seconds=5)(lambda: main_tasks.task(app))
)

[Oleg Korolev]

solution asynchronous tasks:
you need recreate and modify fastapi_utils.tasks.repeat_every.py
https://github.com/dmontagu/fastapi-utils/blob/master/fastapi_utils/tasks.py#L47

def decorator(
        func: Union[NoArgsNoReturnAsyncFuncT, NoArgsNoReturnFuncT],
        *args,
        **kwargs
    ) -> NoArgsNoReturnAsyncFuncT:

https://github.com/dmontagu/fastapi-utils/blob/master/fastapi_utils/tasks.py#L64

await func(*args, **kwargs)  # type: ignore