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https://issues.apache.org/jira/browse/WICKET-4131?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Martin Grigorov resolved WICKET-4131.
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Resolution: Later
It seems there was no interest in this new resource type for 2 years now.
If you think it is still needed/useful then reopen the ticket and apply your
patch.
> Add a non-caching RenderedDynamicImageResource
> ----------------------------------------------
>
> Key: WICKET-4131
> URL: https://issues.apache.org/jira/browse/WICKET-4131
> Project: Wicket
> Issue Type: Improvement
> Components: wicket
> Affects Versions: 1.5.2
> Reporter: Carl-Eric Menzel
> Attachments:
> 0001-WICKET-4131-Add-NonCachingRenderedDynamicImageResour.patch
>
>
> RenderedDynamicImageResource ignores all cache settings and keeps its image
> data once it has been rendered. This is not very useful for tasks like
> rendering statistics which will be reloaded often but with identical
> parameters, yet still need to show updated charts.
> Ideally, RenderedDynamicImageResource's getImageData() method should check
> these cache settings, however, they are not available at that point -- please
> correct me if I'm wrong here.
> Another option would be to simply change getImageData()'s behavior to not
> cache anything. That might break existing code though, so I think we
> shouldn't do that right now.
> As a fallback I propose adding a NonCachingRenderedDynamicImageResource that
> prevents caching. This can then be used as a drop-in replacement for the
> regular RDIR whenever caching should be avoided.
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