How to use aiobotocore context manager with aiohttp on_startup on_shutdown

[kuk]

I have web server on aiohttp and DB on aiobotocore('dynamodb'). As I understand aiobotocore client should only be used inside with statement. How do I then integrate it into aiohttp? My current solution:

async def on_startup(app):
    session = aiobotocore.session.get_session()
    manager = session.create_client('dynamodb')
    client = await manager.__aenter__()
    app['manager'] = manager
    app['client'] = client


async def on_shutdown(app):
   await app['manager'].__aexit__(
        exc_type=None,
        exc_val=None,
        exc_tb=None
    )

web.run_app(
    on_startup=on_startup,
    on_shutdown=on_shutdown,
)

Is it an intended solution? I do not like direct calls to __aenter__, __aexit__

[thehesiod]

can use AsyncExitStack to abstract things

from contextlib import AsyncExitStack

exit_stack = app['exit_stack'] = AsyncExitStack()
app['client'] = await exit_stack.enter_async_context(session.create_client('dynamodb'))

...
await app['exit_stack'].__aexit__(...)

really would be nice if aiohttp provided an exit stack we could chain to.

[kuk]

Is using AsyncExitStack better than my solution? Code is not shorter/cleaner.

Is it a bad idea to have methods like start, stop in aiobotocore?

async def on_startup(app):
    session = aiobotocore.session.get_session()
    app['client'] = await session.create_client('dynamodb'). start()

async def on_shutdown(app):
   await app['client'].stop()

web.run_app(
    on_startup=on_startup,
    on_shutdown=on_shutdown,
)

[thehesiod]

if you don't like calling __aexit__ you can call await app['exit_stack'].aclose()

[kuk]

Thank you! aclose looks better