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https://issues.apache.org/jira/browse/JAMES-4166?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Benoit Tellier closed JAMES-4166.
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Resolution: Fixed
This work is merged.
Awesome work.
> Supports collapseThread on top of OpenSearch
> --------------------------------------------
>
> Key: JAMES-4166
> URL: https://issues.apache.org/jira/browse/JAMES-4166
> Project: James Server
> Issue Type: Improvement
> Components: JMAP, lucene, opensearch
> Reporter: Benoit Tellier
> Assignee: Antoine Duprat
> Priority: Major
> Time Spent: 4h
> Remaining Estimate: 0h
>
> h3. What
> JMAP (RFC-8621) allows to group search results by thread which is currently
> not supported on top of the OpenSearch search engine.
> h3. How
> We would like to implement this feature, that allow thread based mail views,
> using the collapse operator on top of OpenSearch: this is a natural fit.
> Also we currently rely on scroll in JMAP OpenSearch bindings soelely not to
> return duplicate messageIds in our result which is sub-optimal as scroll is
> costly and we basically do on the app side what could have been done in the
> search engine. Managing scroll contexts is furthermore an absolute pain. We
> propose to replace this scroll by collapse either on messageId or on threadId
> (knowing that 2 message with same messageId are guaranteed to have the same
> threadId so collapsing on threadId also guaranties we do not return duplicate
> messageId). We expect a performance gain from this refactoring.
> We would also push the offset and the limit always to the search engine.
> Today offset management is handled in the JMAP layer which is sub-optimal.
> At last I believe we would benefit from a POJO wrapping search options
> (offset, limits) and add a collapseThread option in the SearchQuery object.
> We would also implement this "collapse" flavour for the Lucene
> implementation, used also in the memory server. We would reject this on top
> of the scanning implementation.
> h3. outcome
> - Better JMAP RFC-8621 spec compliance
> - Better performances onto the search engine for JMAP
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