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https://issues.apache.org/jira/browse/JAMES-3916?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Benoit Tellier closed JAMES-3916.
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    Resolution: Won't Fix

We will implement this on top of PGSQL instead.

> JMAP for JPA Guice server
> -------------------------
>
>                 Key: JAMES-3916
>                 URL: https://issues.apache.org/jira/browse/JAMES-3916
>             Project: James Server
>          Issue Type: Improvement
>            Reporter: René Cordier
>            Priority: Minor
>             Fix For: 3.9.0
>
>
> JMAP is available on memory and distributed versions of James. It would be 
> nice to have it on JPA Guice version of James also. But for this, there is 
> some work to do:
>  * Add missing JPA implementations for some data related layers (state 
> changes, Vacation, Identities, ...
>  * Proper JMAP Guice bindings (can look at Cassandra and memory versions to 
> have an idea) => do not care about DraftMethodsModule, as JMAP draft is 
> deprecated
>  * Integration tests
> To be reasonable, should do it step by step. Should have a JMAP module for 
> JPA that will get filled more with each step of the implementation. For 
> example, a good POC would consist of:
>  * starting with a JMAPApiRoutes only serving the Core/Echo method for JPA 
> (should be easy enough, just bindings I think?) and adding JMAP configuration
>  * having a minimal Mailbox with /get, /set and /query methods -> mailbox 
> data layers have been implemented in JPA, only missing is 
> MailboxChangeRepository. Could make a dummy implementation of it first. Could 
> implement it really for JPA in later steps with states and /changes methods
>  * having a minimal Email with /get, /set and /query methods -> 
> EmailChangeRepository dummy implementation first, like 
> MailboxChangeRepository. Also careful with MessageFastViewProjection, could 
> be a dummy implementation too, as when we fail to retrieve data from it we 
> fetch data the normal way
> Then from there we can start thinking about the rest!



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