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Posted to oak-issues@jackrabbit.apache.org by "Jukka Zitting (JIRA)" <ji...@apache.org> on 2013/07/18 14:16:52 UTC

[jira] [Resolved] (OAK-914) Relax the NodeStateDiff.childNodeChanged() semantics

     [ https://issues.apache.org/jira/browse/OAK-914?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Jukka Zitting resolved OAK-914.
-------------------------------

    Resolution: Fixed

Done in http://svn.apache.org/r1504448.
                
> Relax the NodeStateDiff.childNodeChanged() semantics
> ----------------------------------------------------
>
>                 Key: OAK-914
>                 URL: https://issues.apache.org/jira/browse/OAK-914
>             Project: Jackrabbit Oak
>          Issue Type: Improvement
>          Components: core
>            Reporter: Jukka Zitting
>            Assignee: Jukka Zitting
>
> Currently the {{childNodeChanged}} method is specified to only be called when there are some changes within that subtree. However, knowing in advance whether such changes exist can in some cases be as expensive as traversing down that subtree in the {{childNodeChanged}} method, leading to duplicate work. Thus it would be useful to relax the {{childNodeChanged}} method to be called whenever the underlying storage has a good reason to expect that something has changed within the subtree.
> In other words, instead of the method being called only when the storage is sure that there are changes, the contract would be to not call the method only when the storage is sure that there are no changes.

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