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https://issues.apache.org/jira/browse/WICKET-5713?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14156557#comment-14156557
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Sven Meier commented on WICKET-5713:
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That IDE power will show you all IInitializers, but not the registered ones.

> Move /wicket.properties to /META-INF/wicket/xyz.properties
> ----------------------------------------------------------
>
>                 Key: WICKET-5713
>                 URL: https://issues.apache.org/jira/browse/WICKET-5713
>             Project: Wicket
>          Issue Type: Improvement
>          Components: wicket
>    Affects Versions: 6.17.0
>            Reporter: Martin Grigorov
>            Assignee: Martin Grigorov
>            Priority: Minor
>
> As found at http://markmail.org/message/gzychpjelr4eshly the current location 
> of wicket.properties (at the root of the classpath entry) is problematic when 
> an uberjar is used because usually the developer doesn't know how 
> org.apache.wicket.IInitializer works and doesn't add code to merge the 
> contents of all wicket.propeties files in the classpath into one.
> But even if the developer tried to merge them then it will fail again because 
> org.apache.wicket.Application#load(Properties) doesn't expect more than one 
> value per key, e.g. separated by comma.
> Garret Wilson suggested to move /wicket.properties files in /META-INF/wicket/ 
> and use more qualified names, e.g. org.apache.wicket.core.properties.
> The first problem is that there are no JRE and Servlet APIs to find such 
> files easily. We need to scan the classpath to be able to find them and load 
> them.
> Is this costly ?
> https://github.com/ronmamo/reflections is wildly used library that provides 
> this functionality (and much more) and it is using the same logic and seems 
> to be quite fast!
> So let's give it a try!
> We should still support /wicket.properties for backward compatibility. We can 
> log a WARN message when such is found and suggest to be moved in 
> /META-INF/wicket/ 



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