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http://www.stripesframework.org/jira/browse/STS-429?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=11099#action_11099
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Christian Poitras commented on STS-429:
---------------------------------------

I'm not sure if I understand your question, but I'll try to answer.

Each field annotated do create a Thread instance. If the maxTime is negative 
(it's negative by default) the thread will stop very quickly. It's the best way 
I found to let the object remove itself from session. I could scan the session, 
but doing this on each request could overload the server. I could scan the 
session each x minutes, but I would need to keep track of the session ids I 
scan.

The threads do take some cpu time (considering each field would be annotated 
with a positive maxTime), but the check itself it very quick. I guess the scan 
of request parameters if a greater bottleneck. So Tim, if you add this to 
Stripes trunk, please don't include this interceptor in the core!

I hope this answers your question.

> @Session annotation to save and restore fields automatically
> ------------------------------------------------------------
>
>                 Key: STS-429
>                 URL: http://www.stripesframework.org/jira/browse/STS-429
>             Project: Stripes
>          Issue Type: New Feature
>            Reporter: Christian Poitras
>            Assignee: Tim Fennell
>            Priority: Minor
>         Attachments: session-plugin.jar, session-plugin2.jar, 
> session-plugin3.jar, session-plugin4.jar
>
>
> I've added a @Session annotation and an interceptor that automatically saves 
> annotated fields in session and restores the fields on following request.
> This could be a great add-on to Stripes.

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