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From: Kevin Sutter <kwsutter@gmail.com>
Date: Wed, 25 Sep 2013 11:40:36 -0500
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Subject: Re: Entitiy not enhanced
To: users@openjpa.apache.org
Cc: dev@openjpa.apache.org
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Hi,
I've replied privately to Divya on this topic, but I wanted to let everyone
else know that is following this thread...

The -javaagent and the use of the jdk tools to automatically hook in a
javaagent does have some potential limitations (as documented in the
OpenJPA manual).  These approaches for enhancing the entities should be
thought of for development and test environments.  OpenJPA does the best it
can to hook into the classloading mechanism via these approaches, but the
Java hooks are not fool-proof.  We can still miss some entity classes
depending on what gets loaded and when by the Java runtime.

To ensure that your entity classes are properly enhanced in "all cases" is
to either use build-time enhancement, or to use the application server
container classloader hook as defined by the Java EE specs.  I said "all
cases" in quotes because it seems that Divya has uncovered a condition with
the OSGi container in the WebSphere environment where an entity class may
be getting loaded without going through the enhancement process.  This is
considered a bug and will be pursued as such -- that is, it is not a
limitation of the enhancement processing.

Another useful link for enhancement processing is on our wiki:
http://openjpa.apache.org/entity-enhancement.html

Hope this helps,
Kevin


On Wed, Sep 25, 2013 at 10:38 AM, Leonardo K. Shikida <shikida@gmail.com>wrote:

> Hi
>
> I could not make the runtime enhancement work for me too, so I am manually
> enhancing during build time with a simple script.
>
>     public static void main(String[] args) {
>
>         Collection<File> files = FileUtils.listFiles(new
> File(baseClassDir), null, true);
>         for(File file:files){
>             String[] a = new String[3];
>             a[0] = "-d";
>             a[1] = baseClassDir;
>             a[2] = file.getAbsolutePath();
>             org.apache.openjpa.enhance.PCEnhancer.main(a);
>         }
>     }
>
> I've also noticed some strange behaviour using java 7, specifically, both
> IBM and Oracle JVM 7 didn't enhance the source code, but only Oracle
> crashed my tomEE+ server when that happened ;-)
>
> Just in case...
>
> good luck
>
> Leo
>
>
> []
>
> Leo
>
>
> On Wed, Sep 25, 2013 at 12:15 PM, Divya K Konoor <dikonoor@in.ibm.com
> >wrote:
>
> >
> >
> > Hi,
> >
> > I tried by manually adding the java agent in my jvm options  -javaagent:/
> > apache-openjpa-2.2.2/lib/openjpa-all-2.2.2.jar following examples 5.2 and
> > 5.3 under section 2.3 at
> >
> >
> http://openjpa.apache.org/builds/2.1.1/apache-openjpa/docs/ref_guide_pc_enhance.html#ref_guide_pc_enhance_build
> > .
> >
> >  But even that hasn't helped .I still get the entity not enhanced
> problem.
> >
> > Regards
> > Divya
> >
> >
> >
> > From:   Divya K Konoor/India/IBM
> > To:     users-help@openjpa.apache.org, dev-help@openjpa.apache.org,
> > Date:   09/25/2013 07:19 PM
> > Subject:        Entitiy not enhanced
> >
> >
> > Hi,
> >
> > I use a container (Webshphere liberty that internally uses openjpa). I
> have
> > multiple OSGi persistence bundles .Each has its own persistence unit ;
> all
> > of these talk to the same database.The JPA entities bundled within each
> > persistence bundle is defined under the <class></class> tag of the
> > persistence.xml. Some of these entities have relationship or dependency
> on
> > the entities bundled with another persistence bundle in which case the
> > dependent entities are added in the <class> tag of the former's
> > persistence.xml
> >
> > I see the following error message when I start my liberty server:
> >
> > This configuration disallows runtime optimization, but the following
> listed
> > types were not enhanced at build time or at class load time with a
> > javaagent: "
> >
> > [err] <openjpa-2.2.1.1-SNAPSHOT-r422266:1431746 fatal user error>
> > org.apache.openjpa.persistence.ArgumentException: The type "class
> > com.xxx.ProbeConfiguration" has not been enhanced.
> > [err]   at org.apache.openjpa.meta.ClassMetaData.resolveMeta
> > (ClassMetaData.java:1827)
> > [err]   at org.apache.openjpa.meta.ClassMetaData.resolve
> > (ClassMetaData.java:1801)
> > [err]   at org.apache.openjpa.meta.MetaDataRepository.processBuffer
> > (MetaDataRepository.java:826)
> > [err]   at org.apache.openjpa.meta.MetaDataRepository.resolveMeta
> > (MetaDataRepository.java:723)
> > [err]   at org.apache.openjpa.meta.MetaDataRepository.resolve
> > (MetaDataRepository.java:647)
> > [err]   at
> > org.apache.openjpa.meta.MetaDataRepository.getMetaDataInternal
> > (MetaDataRepository.java:415)
> > [err]   at org.apache.openjpa.meta.MetaDataRepository.getMetaData
> > (MetaDataRepository.java:388)
> > [err]   at org.apache.openjpa.meta.MetaDataRepository.resolveAll
> > (MetaDataRepository.java:1990)
> > [err]   at
> > org.apache.openjpa.meta.MetaDataRepository.getQueryMetaDataInternal
> > (MetaDataRepository.java:1968)
> > [err]   at org.apache.openjpa.meta.MetaDataRepository.getQueryMetaData
> > (MetaDataRepository.java:1955)
> > [err]   at
> > org.apache.openjpa.persistence.EntityManagerImpl.createNamedQuery
> > (EntityManagerImpl.java:102
> >
> > There is a brief mention of this here (but it doesn't explain why):
> >
> >
> >
> http://pic.dhe.ibm.com/infocenter/wasinfo/v6r1/index.jsp?topic=%2Fcom.ibm.websphere.ejbfep.multiplatform.doc%2Finfo%2Fae%2Fae%2Ftejb_jpatroubleshoot.html
> >
> > I was under the impression that openjpa does runtime enhancement on all
> JPA
> > entities that have not been enhanced. The above log statement seems to
> > indicate that one or more JPA entities have not been enhanced during
> > runtime.I saw a brief mention about this at
> >
> >
> http://openjpa.apache.org/builds/2.1.1/apache-openjpa/docs/ref_guide_pc_enhance.html#ref_guide_pc_enhance_dynamic
> >
> > "If a javaagent is not provided via the command line and OpenJPA is
> running
> > on the Sun 1.6 SDK or IBM 1.6 JDK (SR8+), OpenJPA will attempt to
> > dynamically load the Enhancer that was mentioned in the previous section.
> > This support is provided as an ease of use feature and it is not
> > recommended for use in a production system. Using this method of
> > enhancement has the following caveats:
> > The dynamic runtime enhancer is plugged into the JVM during creation of
> the
> > EntityManagerFactory. Any Entity classes that are loaded before the
> > EntityManagerFactory is created will not be enhanced. "
> >
> >
> > I also noticed the following in the logs:
> >
> > openjpa.DynamicEnhancementAgent: false .
> >
> > I was expecting it to me openjpa.DynamicEnhancementAgent: true .
> >
> > I manually added the following jvm option
> > -Dopenjpa.DynamicEnhancementAgent=true after which the logs show
> > openjpa.DynamicEnhancementAgent: true but I hit the same entitiy not
> > enhanced issue.
> >
> > Apart from build time enhancement , is there anything that can be done to
> > ensure that all JPA entities are enhanced during runtime.
> >
> > Thanks
> > Divya
> >
> >
>

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