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http://jira.amdatu.org/jira/browse/AMDATU-200?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=10523#comment-10523
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Ivo Ladage - van Doorn commented on AMDATU-200:
-----------------------------------------------

Funny enough, when googling this issue, this page describes the problem!:
http://www.amdatu.org/confluence/display/Amdatu/OSGiification

In this case javax.ws.rs.core.CacheControl contains a static class variable 
that is instantiated with:

    private static final HeaderDelegate<CacheControl> delegate = 
            
RuntimeDelegate.getInstance().createHeaderDelegate(CacheControl.class);

Since no runtime delegate can be found it uses the default, which is 
com.sun.ws.rs.ext.RuntimeDelegateImpl. But the com.sun.ws.rs.ext package is not 
exported by the Felix configuration.

> Add HTTP Caching headers to REST services
> -----------------------------------------
>
>                 Key: AMDATU-200
>                 URL: http://jira.amdatu.org/jira/browse/AMDATU-200
>             Project: Amdatu
>          Issue Type: Bug
>          Components: Amdatu Web
>    Affects Versions: 0.0.6
>            Reporter: Ivo Ladage - van Doorn
>            Assignee: Ivo Ladage - van Doorn
>             Fix For: 0.1.0
>
>
> The current gadgets totally lack HTTP caching headers since JAX-RS does not 
> provide any default caching headers. This should be added to all gadgets out 
> there.
> The missing caching headers is most probably the reason why gadgets act so 
> strange in IE8.

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