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From "David Hausladen (JIRA)" <j...@apache.org>
Subject [jira] [Created] (JCR-3311) No mechanism to transparently engage BTreeManager for flat repositories
Date Tue, 15 May 2012 17:20:08 GMT
David Hausladen created JCR-3311:
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             Summary: 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: 2.4, 2.3, 2.2
            Reporter: David Hausladen


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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