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https://issues.apache.org/jira/browse/WICKET-499?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12491684
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Eelco Hillenius commented on WICKET-499:
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@johan. They are always cleaned up now, but there can be special occurances 
where messages should be carried over. 
That's the last case to cover, and the reason for looking beyond what we have 
now (which I believe is at least more optimal in processing). Putting it in the 
request cycle doesn't solve anything over what we have now except that you 
would leave cleanup for garbage collection.

> Investigate whether we can use component meta data for the storage of 
> feedback messages
> ---------------------------------------------------------------------------------------
>
>                 Key: WICKET-499
>                 URL: https://issues.apache.org/jira/browse/WICKET-499
>             Project: Wicket
>          Issue Type: Improvement
>    Affects Versions: 1.3
>            Reporter: Eelco Hillenius
>             Fix For: 1.3
>
>
> Investigate this. See also 
> http://www.nabble.com/Re%3A-svn-commit%3A-r530991---in--incubator-wicket-trunk-jdk-1.4-wicket-src-main-java-org-apache-wicket%3A-Session.java-feedback-FeedbackMessages.java-p10119808.html
> Advantages of doing this:
> * it is a one-one mapping of the concept that you set a message on a 
> component;
> * you'll never have to worry about cleanup up; just clean up rendered 
> messages, and leave unrendered for whenever they are request or until the 
> component is garbage collected.
> Disadvantages:
> * no central storage place, making it harder to track.
> * probably less efficient in both storage and processing.

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