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From Gerhard Petracek <gerhard.petra...@gmail.com>
Subject Re: [jira] [Created] (DELTASPIKE-293) Improve the ViewScopedContext by observing ServletContext and HttpSession lifecycle events.
Date Mon, 19 Nov 2012 22:35:55 GMT
hi radu,

imo we have 3 easy options:

#1
we continue to rely on jsf-events and just add a session-scoped bean which
triggers the cleanup via its @PreDestroy callback (if the cleanup wasn't
done already).
(we also need one to cleanup the window-context.)

#2
since we also need to track the view-ids for the view-access-scope, we just
use a similar implementation (which follows the rules of the view-scope)
and map it to @ViewScoped.

#3
like #2 but with the help of the window-context (instead of the view-map)
-> similar to [1].

regards,
gerhard

[1]
http://os890.blogspot.co.at/2011/06/session-based-view-scope-with-codi.html



2012/11/19 Mark Struberg <struberg@yahoo.de>

>
>
> Hi Radu!
>
> Yes, we already discussed this and agreed to import it.
> Txs 4 your report!
>
> LieGrue,
> strub
>
>
>
>
>
> >________________________________
> > From: Radu Creanga <rdcrng@gmail.com>
> >To: deltaspike-dev@incubator.apache.org
> >Sent: Sunday, November 18, 2012 11:56 PM
> >Subject: Re: [jira] [Created] (DELTASPIKE-293) Improve the
> ViewScopedContext by observing ServletContext and HttpSession lifecycle
> events.
> >
> >Hello everyone,
> >
> >It seems this will require ServletContext events and Session events to
> >be published to the CDI event bus, which in turn requires adding the
> >appropriate listeners to web.xml until CDI 1.1. I know Seam Solder has
> >these listeners implemented. Are there plans to import it into
> >DeltaSpike?
> >
> >Radu Creanga
> >
> >
> >On Sun, Nov 18, 2012 at 4:32 PM, Radu Creanga (JIRA) <jira@apache.org>
> wrote:
> >> Radu Creanga created DELTASPIKE-293:
> >> ---------------------------------------
> >>
> >>              Summary: Improve the ViewScopedContext by observing
> ServletContext and HttpSession lifecycle events.
> >>                  Key: DELTASPIKE-293
> >>                  URL:
> https://issues.apache.org/jira/browse/DELTASPIKE-293
> >>              Project: DeltaSpike
> >>           Issue Type: Improvement
> >>           Components: JSF-Module
> >>     Affects Versions: 0.4-incubating
> >>             Reporter: Radu Creanga
> >>              Fix For: 0.5-incubating
> >>
> >>
> >> The CDI specification states that Context implementations are
> responsible for destroying instances it creates. The current
> ViewScopedContext relies on PreDestroyViewMapEvents to be notified when a
> view map is destroyed. But, the JSF 2.0 and 2.1 spec only fire this event
> when a view map is replaced. This means that in most cases, instances
> created by ViewScopedContext are not properly destroyed. The
> ViewScopedContext should be observing ServletContext and HttpSession
> lifecycle events instead in order to ensure that all instances it creates
> are properly destroyed. Visible improvements resulting out of this would be
> that the @PostConstruct method of @ViewScoped beans is invoked.
> Additionally, this will probably result in better memory usage, since
> instances that are not properly destroyed are not eligible for GC.
> >>
> >> --
> >> This message is automatically generated by JIRA.
> >> If you think it was sent incorrectly, please contact your JIRA
> administrators
> >> For more information on JIRA, see:
> http://www.atlassian.com/software/jira
> >
> >
> >
>

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