[vertx-dev] Async-Await in Vertx with Project Loom

[August Nagro]

Thanks Julien!

I had cc'd loom-dev, which told me the same; Continuation is now private. (
https://mail.openjdk.java.net/pipermail/loom-dev/2021-October/002989.html).
I updated the repo README with a warning.

Ron pointed out that a custom scheduler could support some Continuation use
cases, but now that I've thought about it some more; I think we can
actually implement 'async/await' with just a Virtual Thread and a lock.

Here's a gist with one approach:
https://gist.github.com/AugustNagro/29eaddbd281621a35dcd8b98337d5369

Now my big question is how Virtual Threads fit into the Vertx/Netty
event-loop story.

Cheers,

- August

On Mon, Oct 18, 2021 at 11:49 PM Julien Viet <julien at julienviet.com> wrote:

> Hi August,
>
> this is very exciting, there are a few ways Vert.x could use Loom and
> experimentations need to be done, thanks for coming with this project.
>
> I can see you are using the Continuation class from Loom, do you know
> wether this class will remain available ? I attended a presentation a
> long time ago and the presenter (Loom lead) said that such classes
> would remain internal.
>
> I encourage you to share this with the async / Vert.x community, I
> created a Loom channel [1] on our discord server where people like you
> can share their experiment and discuss Loom + Vert.x :-)
>
> Julien
>
> [1] https://discord.com/channels/751380286071242794/899911362770268181
>
> On Mon, Oct 18, 2021 at 5:14 AM August Nagro <augustnagro at gmail.com>
> wrote:
> >
> > Hello; I recently implemented async/await in Vertx using Project Loom.
> >
> > Feedback and code review are very welcome. The project is only about 100
> lines of code. Hopefully something similar could be merged into
> `vertx-core` when Loom is released.
> >
> > https://github.com/AugustNagro/vertx-loom
> >
> > Cheers,
> >
> > August
> >
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