Re: [osgi-dev] JPA within an OSGI container

Shaun Smith Mon, 28 Dec 2009 07:44:25 -0800

Hi Miguel,

   I just responded to your post on the EclipseLink forum about this and pointed you at the OSGi examples on the wiki [1].   I suspect your problem is either trying to obtain a persistence unit before either the javax.persistence or EclipseLink JPA bundle are started, or you didn't declare your persistence unit in your bundle manifest. All of this is covered in the examples.

   Also, I see you are using EclipseLink 2.0. If you are developing with PDE in Eclipse 3.5 or 3.5.1 you will likely run into what appears to be a PDE bug [2]. The current workaround is to use PDE in Eclipse < 3.5 for now.

    Shaun

[1] http://wiki.eclipse.org/EclipseLink/Examples/OSGi
[2] https://bugs.eclipse.org/bugs/show_bug.cgi?id=298318

Miguel wrote:

Thank you Chris,

I usually work with standard OSGI API also I must say sometimes spring framework is much better organize! I still have the same error, I have launch the framework with the spring bundles:
osgi> ss

Framework is launched.

id    State       Bundle
0    ACTIVE      org.eclipse.osgi_3.5.1.R35x_v20090827
1    ACTIVE      com.springsource.javax.persistence_2.0.0
2    ACTIVE      com.springsource.org.apache.commons.logging_1.1.1
3    ACTIVE      com.springsource.com.mysql.jdbc_5.1.6
4    ACTIVE      com.springsource.javax.validation_1.0.0.GA
5    ACTIVE      com.springsource.javax.xml.stream_1.0.1
6    ACTIVE      com.springsource.javax.activation_1.1.1
7    ACTIVE      com.springsource.org.eclipse.persistence.internal.libraries.antlr_2.0.0
8    ACTIVE      com.springsource.javax.transaction_1.1.0
9    ACTIVE      com.springsource.org.eclipse.persistence_2.0.0
10    ACTIVE      com.springsource.org.eclipse.persistence.internal.libraries.asm_2.0.0
11    ACTIVE      com.springsource.org.eclipse.persistence.jpa_2.0.0
12    RESOLVED    com.as.jpa.example_1.0.0.200912280843

but when I start the 12th bundle, my jpa example bundle I still have the same error. Do you think that I am missing something in this bundle... headers in the Manifest?

thank you for your help.

osgi> start 12
org.osgi.framework.BundleException: Exception in com.as.jpa.example.Activator.start() of bundle com.as.jpa.example.
    at org.eclipse.osgi.framework.internal.core.BundleContextImpl.startActivator(BundleContextImpl.java:806)
    at org.eclipse.osgi.framework.internal.core.BundleContextImpl.start(BundleContextImpl.java:755)
    at org.eclipse.osgi.framework.internal.core.BundleHost.startWorker(BundleHost.java:352)
    at org.eclipse.osgi.framework.internal.core.AbstractBundle.start(AbstractBundle.java:280)
    at org.eclipse.osgi.framework.internal.core.AbstractBundle.start(AbstractBundle.java:272)
    at org.eclipse.osgi.framework.internal.core.FrameworkCommandProvider._start(FrameworkCommandProvider.java:253)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
    at java.lang.reflect.Method.invoke(Method.java:597)
    at org.eclipse.osgi.framework.internal.core.FrameworkCommandInterpreter.execute(FrameworkCommandInterpreter.java:155)
    at org.eclipse.osgi.framework.internal.core.FrameworkConsole.docommand(FrameworkConsole.java:303)
    at org.eclipse.osgi.framework.internal.core.FrameworkConsole.console(FrameworkConsole.java:288)
    at org.eclipse.osgi.framework.internal.core.FrameworkConsole.run(FrameworkConsole.java:224)
    at java.lang.Thread.run(Thread.java:619)
Caused by: javax.persistence.PersistenceException: No Persistence provider for EntityManager named hello-world
    at javax.persistence.Persistence.createEntityManagerFactory(Persistence.java:84)
    at javax.persistence.Persistence.createEntityManagerFactory(Persistence.java:54)
    at com.as.jpa.example.JpaTest.initEntityManager(JpaTest.java:23)
    at com.as.jpa.example.Activator.start(Activator.java:15)
    at org.eclipse.osgi.framework.internal.core.BundleContextImpl$1.run(BundleContextImpl.java:783)
    at java.security.AccessController.doPrivileged(Native Method)
    at org.eclipse.osgi.framework.internal.core.BundleContextImpl.startActivator(BundleContextImpl.java:774)
    ... 14 more

Miguel

On Sat, Dec 26, 2009 at 9:12 PM, Chris Carrier <[email protected]> wrote:

Seems like you might be missing the main eclipselink bundle. I'm not sure what that core bundle you have is. I just got an app up and running using EclipseLink in Spring DM server. The bundles I had to add to get everything working were:

com.springsource.com.mysql.jdbc-5.1.6.jar
com.springsource.javax.persistence-2.0.0.jar
com.springsource.javax.validation-1.0.0.GA.jar
com.springsource.org.apache.commons.dbcp-1.2.2.osgi.jar
com.springsource.org.apache.commons.pool-1.4.0.jar
com.springsource.org.eclipse.persistence-2.0.0.jar
com.springsource.org.eclipse.persistence.internal.libraries.asm-2.0.0.jar
com.springsource.org.eclipse.persistence.jpa-2.0.0.jar
org.springframework.aspects-3.0.0.RELEASE.jar

I'm not sure if all of those are required just for JPA but that's all the bundles I've installed and like I said things are working for me. It looks like I'm using a newer version but anyway maybe this will help. I think org.eclipse.persistence.jpa at the version you have may be a Fragment bundle. So make sure that whatever parent bundle it's expecting is installed.

Chris

On Sat, Dec 26, 2009 at 5:01 AM, Miguel <[email protected]> wrote:

Hello,

I have a java application using JPA and mysql libraries. The application works correctly using standard java but now I am trying to deploy in insite an OSGI platform.

I have tried to have a look to EclipseLink. Eclipe provides you some bundles to make JPA works properly. The target platform I have:

0    ACTIVE      org.eclipse.osgi_3.5.1.R35x_v20090827
1    ACTIVE      org.eclipse.persistence.asm_1.1.2.v20090612-r4475
2    RESOLVED    com.as.jpa.example_1.0.0.qualifier
3    ACTIVE      org.eclipse.persistence.core_1.1.2.v20090612-r4475
4    ACTIVE      javax.persistence_2.0.0.v200911271158
5    ACTIVE      org.eclipse.persistence.jpa_1.1.2.v20090612-r4475
6    ACTIVE      org.eclipse.persistence.antlr_1.1.2.v20090612-r4475

and the error I get:

org.osgi.framework.BundleException: Exception in com.as.jpa.example.Activator.start() of bundle com.as.jpa.example.
    at org.eclipse.osgi.framework.internal.core.BundleContextImpl.startActivator(BundleContextImpl.java:806)
    at org.eclipse.osgi.framework.internal.core.BundleContextImpl.start(BundleContextImpl.java:755)
    at org. ... [...]
Caused by: Exception [EclipseLink-28027] (Eclipse Persistence Services - 1.1.2.v20090612-r4475): org.eclipse.persistence.exceptions.EntityManagerSetupException
Exception Description: An attempt has been made to use PersistenceUnit [hello-world], but no bundle is available that defines that persistence unit.
    at org.eclipse.persistence.exceptions.EntityManagerSetupException.couldNotFindPersistenceUnitBundle(EntityManagerSetupException.java:298)
    at org.eclipse.persistence.internal.jpa.deployment.osgi.OSGiPersistenceInitializationHelper.getClassLoader(OSGiPersistenceInitializationHelper.java:129)
    at org.eclipse.persistence.jpa.PersistenceProvider.createEntityManagerFactory(PersistenceProvider.java:66)
    at javax.persistence.Persistence.createEntityManagerFactory(Persistence.java:78)
    at javax.persistence.Persistence.createEntityManagerFactory(Persistence.java:54)
    at com.as.jpa.example.JpaTest.initEntityManager(JpaTest.java:23)
    at com.as.jpa.example.Activator.start(Activator.java:15)
    at org.eclipse.osgi.framework.internal.core.BundleContextImpl$1.run(BundleContextImpl.java:783)
    at java.security.AccessController.doPrivileged(Native Method)
    at org.eclipse.osgi.framework.internal.core.BundleContextImpl.startActivator(BundleContextImpl.java:774)
    ... 14 more

I have also tried
http://www.dynamicjava.org/projects/jsr-api/jpa-osgi

but I must be missing some bundles or libraries because i can not make it works.

could anybody throw light about it?

thank you!

Miguel
Sent from Madrid, Spain

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Shaun Smith | Principal Product Manager
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Oracle Server Technologies, Oracle TopLink
ORACLE Canada | 110 Matheson Boulevard West, Suite 100, Mississauga, Ontario | L5R 3P4

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Re: [osgi-dev] JPA within an OSGI container

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