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https://issues.apache.org/jira/browse/JAMES-1588?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14653268#comment-14653268
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Matthieu Baechler commented on JAMES-1588:
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> Are you thinking to put this backends module at the same level as server, 
> mailbox...?

Exactly

> I proposed the same kind of module some time ago, but we decided to not 
> follow that way. Looking back , it sound like this would not have been the 
> best thing to do (release management...).

You are right one this point : it makes building James even more difficult. But 
duplicating libraries doesn't seems a good idea neither.

> The other way would be to merge all james modules in one structure to make a 
> single release. This may be worth to start a discussion on the maliling list.

Thank you very much to bring this subject to discussion : we are struggling for 
months to find a good workflow to work on James. The split repositories is a 
hell to manage, you can see our james-parent repository 
(https://github.com/linagora/james-parent) where we aggregate git repositories 
with git submodule. But everything is much harder that way and if we start a 
discussion on the mailing list about repositories merge, I will be happy to 
push my arguments there.

> Create a project to centralize Cassandra tools
> ----------------------------------------------
>
>                 Key: JAMES-1588
>                 URL: https://issues.apache.org/jira/browse/JAMES-1588
>             Project: James Server
>          Issue Type: Improvement
>            Reporter: Tellier Benoit
>
> As we are starting to develop data tools based on Cassandra, we realized we 
> would use tools we defined for the Cassandra mailbox. But :
>  - We don't want a dependency to the cassandra mailbox in our data-cassandra 
> module
>  - We do not want to duplicate information.
> Hence we prefer introducing a new module, that centralize tools needed by 
> modules relying on Cassandra ( for now the Cassandra mailbox, and the 
> data-cassandra module, Cassandra MPT module ).
> As we think this can be a common need to several backend implementation, we 
> want to create a dedicated project for centralizing back-end tools, that will 
> be calles james-backends. Each back-end ( eg : cassandra, jpa, hbase, etc ... 
> ) will create its submodule in it and will use it in other places (MPT, 
> Mailbox, james (server) ).
> Let us now if you have any feedback on this proposal.



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