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From "Timothy Ward (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (ARIES-1648) Aries JPA does not advertise EntityManagerFactoryBuilder or EntityManagerFactory services
Date Wed, 04 Jan 2017 11:23:58 GMT

    [ https://issues.apache.org/jira/browse/ARIES-1648?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15797996#comment-15797996
] 

Timothy Ward commented on ARIES-1648:
-------------------------------------

The uses attributes are necessary for the resolver to do the correct wiring, even outside
the framework uses constraints can ensure useful things. For example they can make sure that
you don't end up with a second Aries JPA container which isn't in the same class space as
the JPA provider!

> Aries JPA does not advertise EntityManagerFactoryBuilder or EntityManagerFactory services
> -----------------------------------------------------------------------------------------
>
>                 Key: ARIES-1648
>                 URL: https://issues.apache.org/jira/browse/ARIES-1648
>             Project: Aries
>          Issue Type: Bug
>          Components: JPA
>    Affects Versions: jpa-2.5.0
>            Reporter: Timothy Ward
>            Assignee: Christian Schneider
>             Fix For: jpa-2.6.0
>
>
> The Aries JPA container provides an extender for persistence bundles. This extender results
in the registration of EntityManagerFactory and/or EntityManagerFactoryBuilder services. These
services are then used by clients to make use of JPA.
> The problem is that there are no capabilities advertising this feature. Ideally there
would be a Provide-Capability added automatically to every persistence bundle, but this is
true for few, if any, persistence bundles, and also most persistence bundles do not make use
of the org.osgi.service.jpa package, making the uses constraint impossible to apply.
> Therefore the Provide Capability header should go on the Aries JPA container:
> Provide-Capability: osgi.service;objectClass=javax.persistence.EntityManagerFactory;effective:=active;uses:=javax.persistence,osgi.service;objectClass=org.osgi.service.jpa.EntityManagerFactoryBuilder;effective:=active";uses:=org.osgi.service.jpa



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