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https://issues.apache.org/jira/browse/OAK-9976?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=18018034#comment-18018034
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Thomas Mueller commented on OAK-9976:
-------------------------------------
The attached event.zip contains the draft PR; files in
oak-core/src/main/java/org/apache/jackrabbit/oak/plugins/index/event
> Reliable Observation / Event Listener / Event Index
> ---------------------------------------------------
>
> Key: OAK-9976
> URL: https://issues.apache.org/jira/browse/OAK-9976
> Project: Jackrabbit Oak
> Issue Type: Improvement
> Reporter: Thomas Mueller
> Assignee: Thomas Mueller
> Priority: Minor
> Labels: observation
> Attachments: event.zip
>
>
> Currently, Oak observation listeners can not easily be implemented in a
> reliable way. Specially, it is not easy to access old data, after a change,
> delete, or move happens, in a reliable way.
> For some cases, it is possible, see
> https://jackrabbit.apache.org/oak/docs/features/observation.html
> Here I would like to work on a reliable listener mechanism.
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