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https://issues.apache.org/jira/browse/OAK-5430?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16539799#comment-16539799
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Julian Reschke commented on OAK-5430:
-------------------------------------
trunk: [r1778235|http://svn.apache.org/r1778235]
> Provide an extension point in DocumentNodeStore Journal support
> ---------------------------------------------------------------
>
> Key: OAK-5430
> URL: https://issues.apache.org/jira/browse/OAK-5430
> Project: Jackrabbit Oak
> Issue Type: Technical task
> Components: documentmk
> Reporter: Chetan Mehrotra
> Assignee: Chetan Mehrotra
> Priority: Major
> Fix For: 1.5.18, 1.6.0
>
> Attachments: OAK-5430-v1.diff
>
>
> As discussed in OAK-4808 B1 I would like to expose an extension point in form
> of SPI in DocumentNodeStore Journal handling.
> Each component which needs to add a custom property to {{JournalEntry}} would
> provide a {{JournalPropertyService}}. This service would provide a
> {{JournalPropertyBuilder}} which would be used to accumulate the
> {{JournalProperty}}
> # For background write - {{JournalProperty}} would be read from
> {{CommitInfo}} and would be added to the builder. Upon background write cycle
> the builder would provide a string representation of the builder state which
> would be save as a property in {{JournalEntry}}
> # For background read - {{DocumentNodeStore}} would create builder for each
> service and would update them from string property value which are read from
> the JournalEntry
> {{DocumentNodeStore}} would lookup all {{JournalPropertyService}} via
> {{JournalPropertyServiceTracker}} and construct a {{JournalPropertyHandler}}
> which would manage the builder state
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