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https://issues.apache.org/jira/browse/KARAF-4615?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15367508#comment-15367508
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Christian Schneider commented on KARAF-4615:
--------------------------------------------
It seems that one reason why we get both jpa specs installed is that Aries JPA
needs the osgi jpa spec package. This package is bundled with the eclipse jpa
spec bundle 2.1 but not the 2.0 one from geronimo.
I tried to install the OSGi jpa spec bundle as a separate bundle but this
bundle does not support the jpa 2.1 spec. So this is not an option.
I also tried to embed the OSGi jpa spec package into Aries JPA container but
that also does not guarantee that only one jpa spec is installed.
So I am kind of stuck on this.
> Cannot get OpenJPA 2.4.1 to work due to JPA 2.1 being installed
> ---------------------------------------------------------------
>
> Key: KARAF-4615
> URL: https://issues.apache.org/jira/browse/KARAF-4615
> Project: Karaf
> Issue Type: Bug
> Components: karaf-feature
> Affects Versions: 4.0.5
> Reporter: Bengt Rodehav
> Assignee: Christian Schneider
> Fix For: 4.0.6
>
>
> In order to use OpenJPA 2.4.1 both the "openjpa" (2.4.1) feature and the
> "jpa" (2.3.0) features need to be installed.
> However, OpenJPA needs JPA 2.0 - it does not work with JPA 2.1. But when
> installing the "jpa" (2.3.0) feature, JPA 2.1 is being installed.
> This has been discussed on the Karaf user list under the subject "Migrating
> from Karaf 2.4.1 to 4.0.5, JPA problems".
> I have, as a workaround, modified the enterprise-4.0.5-features.xml, feature
> "jpa" (2.3.0), as follows:
> * I have changed the version range for the peristence-api feature from
> [2.0.0,2.2.0) to [2.0.0,2.1.0). This disqualifies JPA 2.1 and instead cause
> JPA 2.0 to be installed.
> * The JPA 2.1 bundle seemed to be providing the package org.osgi.service.jpa
> which is mandatory. I therefore added the following dependency:
> ** <bundle dependency="true">mvn:org.osgi/org.osgi.service.jpa/1.0.0</bundle>
> So my modified "jpa" (2.3.0) feature now looks like this:
> <feature name="jpa" description="OSGi Persistence Container" version="2.3.0">
> <details>JPA implementation provided by Apache Aries JPA 2.x. NB: this
> feature doesn't provide the JPA engine, you have to install one by yourself
> (OpenJPA for instance)</details>
> <feature version="[1.1,2)" prerequisite="false"
> dependency="false">transaction-api</feature>
> <bundle dependency="true">mvn:org.osgi/org.osgi.service.jpa/1.0.0</bundle>
> <feature version="[2.0.0,2.1.0)" prerequisite="false"
> dependency="false">persistence-api</feature>
> <bundle
> dependency="true">mvn:org.apache.felix/org.apache.felix.coordinator/1.0.2</bundle>
> <bundle
> dependency="true">mvn:org.osgi/org.osgi.service.jdbc/1.0.0</bundle>
> <bundle>mvn:org.apache.aries.jpa/org.apache.aries.jpa.api/2.3.0</bundle>
>
> <bundle>mvn:org.apache.aries.jpa/org.apache.aries.jpa.container/2.3.0</bundle>
>
> <bundle>mvn:org.apache.aries.jpa/org.apache.aries.jpa.support/2.3.0</bundle>
> <conditional>
> <condition>aries-blueprint</condition>
>
> <bundle>mvn:org.apache.aries.jpa/org.apache.aries.jpa.blueprint/2.3.0</bundle>
> </conditional>
> </feature>
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