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https://issues.apache.org/jira/browse/SLING-1778?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12910194#action_12910194
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Julian Sedding commented on SLING-1778:
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> Just thinking out loud here, but how about *only* supporting overlays. I can
> see how
> overlays and symlinks are related, but they actually seems like different use
> cases.
Ok, that could be easily done. What about the following: if we think of the
tree we want to overlay as the "shadow"-tree (again, I'm open for better
names), we could define a property "sling:shadow" (or sling:shadowPath,
sling:shadowRoot?). "sling:shadow" would contain a string value, the root path
of the "shadow"-tree.
You suggest *only* supporting overlays. Would you drop the symlink use-case
entirely, implement it using shareable nodes or support it via a sling:symlink
(aka sling:symlinkTarget, playing the names-game again) property? Supporting
the last use-case would be trivial, however, it might be confusing.
> Symlinks
> --------
>
> Key: SLING-1778
> URL: https://issues.apache.org/jira/browse/SLING-1778
> Project: Sling
> Issue Type: New Feature
> Components: JCR
> Reporter: Julian Sedding
> Attachments: symlinks.patch
>
>
> I have implemented a ResourceProvider, which allows to create symlink nodes
> in the JCR repository. A symlink node has a sling:symlinkTarget property,
> which should contain a valid JCR path. JCR content from the
> sling:symlinkTarget path is then exposed below the symlink node.
> There is a mixin node type, sling:Symlink with a mandatory property
> sling:symlinkTarget and an optional property sling:overlayable. Additionally,
> there is a convenience node type, sling:SymlinkResource, which extends from
> sling:symlinkTarget and nt:unstructured.
> ResourceProvider instances are registered for existing symlinks when the
> bundle is started. Modifications are taken care of via JCR observation.
> To get started:
> * apply the attached patch to a trunk checkout
> * build and install the bundle
> * create a symlink node, pointing to some existing content
> * access the symlink node e.g. via a browser
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