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https://issues.apache.org/jira/browse/WICKET-6055?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Sven Meier resolved WICKET-6055.
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Resolution: Fixed
Fix Version/s: 8.0.0
Thanks to all participants :)
> AjaxLazyLoadPanel should provide non-blocking lazy load
> -------------------------------------------------------
>
> Key: WICKET-6055
> URL: https://issues.apache.org/jira/browse/WICKET-6055
> Project: Wicket
> Issue Type: Improvement
> Components: wicket-extensions
> Affects Versions: 7.1.0
> Reporter: Martijn Dashorst
> Assignee: Martijn Dashorst
> Fix For: 8.0.0
>
>
> When having multiple AjaxLazyLoadPanels on your page, they all block their
> Wicket request thread until the content is ready to load. This can be
> problematic when you try to wait for some background job to finish and want
> to poll for that job to be ready, and only then update the contents.
> The improvement would be to add a method that gives the developer the option
> to not update just yet (isReadyForReplacement) and when it returns true,
> start the replacement. By default this would return true, implementing the
> current behavior of the AjaxLazyLoadPanel.
> Furthermore to improve the responsiveness of the ALLP it should add a single
> timer to the page that can be used by multiple ALLPs to update themselves.
> The timer would poll each second and the ALLPs would use Wicket's event bus
> to update themselves. With some reference counting, the timer can remove
> itself from the page when all ALLPs have updated themselves.
> This enables refreshing the page as well when outside an AJAX context, or
> having a user be impatient and pressing F5.
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