[hibernate-dev] [OGM] Neo4j integration dependencies

[Sanne Grinovero]

I would prefer to see these modules split as 3 different Maven
modules, but I wouldn't personally consider such work a priority.

Splitting them up would make for "lighter" fragments for e.g. Swarm,
but at the cost of a couple more paragraphs of documentation which
needs to be understood (more complex).

So I dislike the 2-modules tradeoff as users would be faced with the
additional configuration complexity, yet they would only get a
half-baked reward in exchange for it.

If you find some "interesting" Maven plugin which allows some kind of
build-time reorganization of these dependencies then please make sure
that we actually test the consumption of the output maven definitions.
In other words, I'd avoid that!

Thanks,
Sanne




On 19 October 2016 at 10:17, Davide D'Alto <davide at hibernate.org> wrote:
> The integration with Neo4j in OGM makes it possible for a user to
> select the strategy that he wants to use to connect to an embedded or
> remote Neo4j instance.
> There are 3 possible options:
> 1) Embedded mode, Neo4j run in the same JVM
> 2) Remote via HTTP interface using RestEasy
> 3) Remote via the Bolt protocol using the neo4j-java-driver library
>
> Everything is now in one single artifact meaning that for each case we
> have more dependencies than needed, in particular for the remote
> cases.
>
> Possible solutions I can think of at the moment are:
>
> 1) Have different maven artifacts:
>     - We could have 3 artifacts: EMBEDDED, HTTP and BOLT
>     - or 2 artifacts: EMBEDDED and REMOTE: This won't completely solve
> the issue because w would still have
>       resteasy (for HTTP) and neo4j-java-driver (for BOLT) but it
> might be a good trade-off
>
>     We will need to share some resource so this approach might require
> a Neo4j common library.
>
> 2) Make some dependencies optional (Need to test this, but it might work)
>
> 3) Use some maven plugin to generate different artifacts from the same
> module. I haven't used this approach before so I'm not sure if it is
> feasible.
>
> 4) ???
>
> Any opinion about this?
>
> Issue on JIRA: https://hibernate.atlassian.net/browse/OGM-1190
>
> Thanks,
> Davide
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