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From Michael Dürig (JIRA) <j...@apache.org>
Subject [jira] [Commented] (JCR-3311) No mechanism to transparently engage BTreeManager for flat repositories
Date Mon, 21 May 2012 09:49:40 GMT

    [ https://issues.apache.org/jira/browse/JCR-3311?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13280056#comment-13280056

Michael Dürig commented on JCR-3311:

Thanks for the patch. This looks like a good start. I'll try to dig deeper as soon as time
> No mechanism to transparently engage BTreeManager for flat repositories
> -----------------------------------------------------------------------
>                 Key: JCR-3311
>                 URL: https://issues.apache.org/jira/browse/JCR-3311
>             Project: Jackrabbit Content Repository
>          Issue Type: Bug
>          Components: jackrabbit-jcr-commons
>    Affects Versions: 2.2, 2.3, 2.4
>            Reporter: David Hausladen
>              Labels: flat, repository
>         Attachments: NodeWrapper.java
> For someone to enjoy the benefits of the BTreeManager to map between an external, flat
path and an internally-branching tree, he must use jackrabbit-specific classes to achieve
it.  This is is undesirable.  It would be better if, through configuration, he could specify
that his paths are likely flat and Jackrabbit would return implementations of the Node interface
that would interact with the BTreeManager internally so that the application code could remain
agnostic of the internal challenges of dealing with large numbers of child nodes.
> I've attached NodeWrapper.java which is a preliminary attempt at adapting the Node interface
to the BTreeManager.  In practice, however, I found that if the returned, wrapped Nodes were
interrogated for their path, they would return the internal, rather than external, paths.
 Without an approach to address this problem, I abandoned testing.
> I would not have a problem with an assumption that the configuration option must be chosen
at repository creation time and must not be changed thereafter.

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