Re: [undertow-dev] Inconsistency in performing async task
Hi Stuart,
Here's the pattern:
```
public void handleRequest...
{
if (exchange.isInIoThread())
{
exchange.dispatch(this);
return;
}
//do some I/O intensive work
//...
CompletableFuture.supplyAsync(.../*send email with logged exception
handling*/...) //#A
exchange.getResponseSender().send(responseJson);
}
```
The line #A is inconsistent. The task in #A is executed by a thread in
common forkjoin pool and may be that could be the reason? I'm not sure.
Maybe using one of undertow's worker threads might solve it? Is there a way
to do so? All I want is to return response to the client immediately and
execute delayable work in the background thread.
Thanks.
On Mon, Mar 26, 2018 at 4:50 AM, Stuart Douglas <sdouglas(a)redhat.com> wrote:
How are you running the task? If you just submit it to the worker it
should just run like any normal executor.
Stuart
On Mon, Mar 26, 2018 at 3:31 AM, Nabeel Imtiaz <nimtiazm(a)gmail.com> wrote:
> Hi,
>
> I'm trying to perform expensive tasks (like sending email/sms etc) as an
> async task (using CompletableFuture API) after my undertow worker completes
> and i'm about to respond to the client. These tasks are supposed to work
> like fire and forget and I don't want to wait until the task completes and
> then respond to the client.
>
> I've noticed that sometimes the task doesn't execute and sometimes it
> does. It's inconsistent and hard to reproduce. Is there a way to be able to
> perform these async tasks consistently? May be i'm using wrong thread-pool?
> Or may be there's already a way in Undertow to do such tasks.
>
> Please comment.
>
> Thanks.
>
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