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https://issues.apache.org/jira/browse/JAMES-2919?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Benoit Tellier reopened JAMES-2919:
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> Allow partial message read in JMAP DRAFT
> ----------------------------------------
>
> Key: JAMES-2919
> URL: https://issues.apache.org/jira/browse/JAMES-2919
> Project: James Server
> Issue Type: Wish
> Components: JMAP
> Reporter: Benoit Tellier
> Assignee: Antoine Duprat
> Priority: Major
> Fix For: 3.5.0
>
> Attachments: adr-0001-jmap-partial-reads.md,
> adr-0001-jmap-partial-reads.md, adr-0002-precompute-jmap-preview.md,
> adr-0002-precompute-jmap-preview.md
>
>
> Please find attached the two technical decisions being proposed.
> h1. Objectives:
> - Reduce the pressure exerced by JMAP on underlying data stores
> - Improve network usage between James & JMAP client
> h2. Proposal for JMAP partial reads
> Introduce two projections for JMAP messages:
> - One with only metadata
> - One with metadata + headers
> Given the properties requested by the client, the most appropriate message
> projection will be returned.
> Finally, we should nullify JSON fields not requested by the client before
> sending it to the client.
> h2. Proposal for JMAP preview computation
> We should pre-compute message preview.
> A MailboxListener will compute the preview and store it in a
> MessagePreviewStore.
> We should have a Cassandra and memory implementation.
> When the preview is precomputed then for these messages we can consider the
> "preview" property as a metadata.
> We should provide a webAdmin task allowing to rebuild the projection.
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