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https://issues.apache.org/jira/browse/OAK-2262?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Davide Giannella closed OAK-2262.
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Bulk closing for 1.1.8
> Add metadata about the changed value to a PROPERTY_CHANGED event on a
> multivalued property
> ------------------------------------------------------------------------------------------
>
> Key: OAK-2262
> URL: https://issues.apache.org/jira/browse/OAK-2262
> Project: Jackrabbit Oak
> Issue Type: Improvement
> Components: core, jcr
> Affects Versions: 1.1.2
> Reporter: Tommaso Teofili
> Assignee: Michael Dürig
> Labels: observation
> Fix For: 1.1.8
>
>
> When getting _PROPERTY_CHANGED_ events on non-multivalued properties only one
> value can have actually changed so that handlers of such events do not need
> any further information to process it and eventually work on the changed
> value; on the other hand _PROPERTY_CHANGED_ events on multivalued properties
> (e.g. String[]) may relate to any of the values and that brings a source of
> uncertainty on event handlers processing such changes because there's no mean
> to understand which property value had been changed and therefore to them to
> react accordingly.
> A workaround for that is to create Oak specific _Observers_ which can deal
> with the diff between before and after state and create a specific event
> containing the "diff", however this would add a non trivial load to the
> repository because of the _Observer_ itself and because of the additional
> events being generated while it'd be great if the 'default' events would have
> metadata e.g. of the changed value index or similar information that can help
> understanding which value has been changed (added, deleted, updated).
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