launch server as task?

Currently uvicorn.run() calls Server.run(...) which calls loop.run_until_complete(...). Additionally uvicorn insists on starting the loop itself too (in setup_loop)

As such, it is made very difficult to launch other tasks in the same process.

Is there a way to launch the server as just a task on the loop and have the ability to schedule additional tasks on the loop?

IIUC there were some related issues in the past but not clear to me what is going to happen with these.

[rob-blackbourn]

Hi @toonknapen ,

This is a problem that I’ve had to solve, so I wrote a blog entry on it here. I think the bit right at the end might be what you’re looking for.

[tomchristie]

We’ve added a Config(loop="none") option now, if you really need it. Also see server.serve(...) if you want to run the uvicorn server from within an existing async context.

On the whole the ASGI lifespan messaging is the right way to include application startup or scheduled background tasks.

I’m wondering if we ought to include a startup=<some_func> and shutdown=<some_func> options, that hook in startup and shutdown tasks easily? That might be easier for folks in cases where they’re not using an application framework that provides those hooks itself?