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From "Jukka Zitting (JIRA)" <j...@apache.org>
Subject [jira] Resolved: (JCR-1469) Data store garbage collection: ScanEventListener not working
Date Mon, 17 Mar 2008 21:08:24 GMT

     [ https://issues.apache.org/jira/browse/JCR-1469?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Jukka Zitting resolved JCR-1469.
--------------------------------

       Resolution: Fixed
    Fix Version/s: core 1.4.2

OK, merged to the 1.4 branch in revision 638066.

> Data store garbage collection: ScanEventListener not working
> ------------------------------------------------------------
>
>                 Key: JCR-1469
>                 URL: https://issues.apache.org/jira/browse/JCR-1469
>             Project: Jackrabbit
>          Issue Type: Improvement
>          Components: jackrabbit-core
>    Affects Versions: core 1.4.1
>            Reporter: Thomas Mueller
>            Assignee: Thomas Mueller
>             Fix For: core 1.4.2
>
>
> The ScanEventListener is currently only called when using the 'scan all nodes recursively'
strategy. It is not called when all persistence managers implement IterablePersistenceManager
(GarbageCollector.scanPersistenceManagers). The ScanEventListener should be called in every
case, otherwise it is not possible to see the progress of the garbage collection.
> However there is a problem: IterablePersistenceManager.getAllNodeIds() doesn't return
Node objects, and it would make little sense to create real node objects (the performance
advantage of scanPersistenceManagers would be lost).
> Therefore, I propose a workaround: the ScanEventListener is called using a 'PseudoNode'.
This is a class that implements Node but only has meaningful getUUID() and toString() methods.
This allows to create a meaningful progress bar (as the UUIDs are returned in order).

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