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https://issues.apache.org/jira/browse/OAK-3767?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Marcel Reutegger updated OAK-3767:
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Fix Version/s: (was: 1.8)
1.10
> Provide a way to extend shipped index definitions
> -------------------------------------------------
>
> Key: OAK-3767
> URL: https://issues.apache.org/jira/browse/OAK-3767
> Project: Jackrabbit Oak
> Issue Type: New Feature
> Components: indexing, query
> Reporter: Davide Giannella
> Fix For: 1.10
>
>
> We need to provide an explicit support for extending out of the box shipped
> index definition by an application built on top of Oak. Consider a Sling
> based app which ships with an index on assets like /oak:index/assetIndex.
> This application is now used in a project where some project specific
> extensions are to be done i.e. some new custom asset properties are to be
> indexed. Currently there are two options
> # Create new duplicate index - For project usage we can create a separate
> index which includes the project specific properties. This has following
> downsides
> ## Increases index memory consumption - As both /oak:index/assetIndex and
> /oak:index/myAssetIndex would index same asset nodes they would be storing
> the same asset path twice and hence cause an increase in memory consumption
> by the index
> # Increase in indexing time - With increase in number of indexes at same
> level the indexing time would increase
> # Ambiguity in index selection - As both indexes index same type of nodes
> they would compete in answering queries related to assets leading to
> ambiguity in index selection by query engine.
> Given above it would be better to avoid such cases and provide an explicit
> support for extending the index definitions. This can be done by enabling
> support for adding index definition extensions under a sub directory in a sub
> directory under /oak:index
> {noformat}
> /oak:index
> + assetIndex
> + apps
> + assetIndex
> {noformat}
> The indexing logic should then use the effective index definition for
> indexing and querying.
> *question*. Shall we allow this only under root or under any arbitrary path
> as well? For example /content.
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