Thanks Michael,

That helped a bit! What required config properties do I need to set? I 
had the following set up in plugin config in the pom.xml.

[snip]
      <plugin>
        <groupId>org.codehaus.mojo</groupId>
        <artifactId>openjpa-maven-plugin</artifactId>
        <version>0.0.1-SNAPSHOT</version>
        <configuration>
          <toolProperties>
            <property>
              <name>addDefaultConstructor</name>
              <value>false</value>
            </property>
            <property>
              <name>enforcePropertyRestrictions</name>
              <value>true</value>
            </property>
          </toolProperties>
        </configuration>
      </plugin>
[/snip]

And this is what I see in the logs. Appreciate the help.

[snip]
[DEBUG] -- end configuration --
[INFO] [openjpa:enhance]
[INFO] running OpenJPA Enhancer Mojo...
[DEBUG] Classes Dir is : 
E:\continuum-key-based-refactor\continuum-model\target\classes
[DEBUG] Executing command line:
[DEBUG] java -cp 
E:\continuum-key-based-refactor\continuum-model\target\classes;e:\repository\classworlds\classworlds\1.1\classworlds-1.1.jar;e:\repository\org\codehaus\plexus\plexus-container-default\1.0-alpha-10\plexus-container-default-1.0-alpha-10.jar;e:\repository\net\java\dev\stax-utils\stax-utils\20060502\stax-uti
ls-20060502.jar;e:\repository\stax\stax-api\1.0.1\stax-api-1.0.1.jar;e:\repository\org\codehaus\plexus\plexus-utils\1.2\plexus-utils-1.2.jar;E:\repository\org\ap
ache\openjpa\openjpa-jdbc-5\0.9.7-incubating-SNAPSHOT\openjpa-jdbc-5-0.9.7-incubating-SNAPSHOT.jar;E:\repository\org\apache\openjpa\openjpa-jdbc\0.9.7-incubating-SNAPSHOT\openjpa-jdbc-0.9.7-incubating-SNAPSHOT.jar;E:\repository\ant\ant\1.6.5\ant-1.6.5.jar;E:\repository\commons-logging\commons-logging\1.0.4\commons-logging-1.0.4.jar;E:\repository\org\apache\geronimo\specs\geronimo-jms_1.1_spec\1.0.1\geronimo-jms_1.1_spec-1.0.1.jar;E:\repository\commons-lang\commons-lang\2.1\commons-lang-2.1.jar;E:\repository\org\apache\openjpa\openjpa-kernel\0.9.7-incubating-SNAPSHOT\openjpa-kernel-0.9.7-incubating-SNAPSHOT.jar;E:\repository\log4j\log4j\1.2.13\log4j-1.2.13.jar;E:\repository\org\apache\openjpa\openjpa-all\0.9.7-incubating-SNAPSHOT\openjpa-all-0.9.7-incubating-SNAPSHOT.jar;E:\repository\net\sourceforge\serp\serp\1.11.0\serp-1.11.0.jar;E:\repository\org\apache\geronimo\specs\geronimo-jta_1.0.1B_spec\1.0.1\geronimo-jta_1.0.1B_spec-1.0.1.jar;E:\repository\commons-collections\common
 s-collections\3.2\commons-collections-3.2.jar;E:\repository\org\apache\openjpa\openjpa-lib\0.9.7-incubating-SNAPSHOT\openjpa-lib-0.9.7-incubating-SNAPSHOT.jar;E:\repository\org\apache\openjpa\openjpa-persistence\0.9.7-incubating-SNAPSHOT\openjpa-persistence-0.9.7-incubating-SNAPSHOT.jar;E:\repository\javax\persistence\persistence-api\1.0\persistence-api-1.0.jar;E:\repository\org\apache\openjpa\openjpa-persistence-jdbc\0.9.7-incubating-SNAPSHOT\openjpa-persistence-jdbc-0.9.7-incubating-SNAPSHOT.jar;E:\repository\org\apache\openjpa\openjpa-xmlstore\0.9.7-incubating-SNAPSHOT\openjpa-xmlstore-0.9.7-incubating-SNAPSHOT.jar;E:\repository\org\apache\geronimo\specs\geronimo-j2ee-connector_1.5_spec\1.0.1\geronimo-j2ee-connector_1.5_spec-1.0.1.jar;E:\repository\commons-pool\commons-pool\1.3\commons-pool-1.3.jar;E:\repository\org\apache\openjpa\openjpa-kernel-5\0.9.7-incubating-SNAPSHOT\openjpa-kernel-5-0.9.7-incubating-SNAPSHOT.jar;E:\repository\hsqldb\hsqldb\1.8.0.1\hsqldb-1.8.0.1.ja
 r;D:\rnd\apps\maven-2.0.4\core\plexus-container-default-1.0-alpha-9.jar;D:\rnd\apps\maven-2.0.4\lib\maven-artifact-2.0.4.jar;D:\rnd\apps\maven-2.0.4\lib\maven-plugin-api-2.0.4.jar;D:\rnd\apps\maven-2.0.4\core\plexus-utils-1.1.jar 
org.apache.openjpa.enhance.PCEnhancer -addDefaultConstructor 
false -enforcePropertyRestrictions true 
E:\continuum-key-based-refactor\continuum-model\target\classes\META-INF\package.jdo
[DEBUG] Exit code: 1
[DEBUG] --------------------
[DEBUG]  Standard output from the Open JPA Enhancer tool:
[DEBUG] --------------------
[INFO]
[DEBUG] --------------------
[ERROR] --------------------
[ERROR]  Standard error from the OpenJPA Enhancer tool:
[ERROR] --------------------
[ERROR] Exception in thread "main" <4|true|0.9.7-incubating-SNAPSHOT> 
org.apache.openjpa.util.MetaDataException: MetaDataFactory could not be 
configured (conf.ne
wMetaDataFactoryInstance() returned null). This might mean that no 
configuration properties were found. If you are using Ant, please see 
the <properties> or <pro
pertiesFile> attributes of the task's nested <config> element. This can 
also occur if your OpenJPA distribution jars are corrupt, or if your 
security policy is o
verly strict.
        at 
org.apache.openjpa.meta.MetaDataRepository.initializeMetaDataFactory(MetaDataRepository.java:1470)
        at 
org.apache.openjpa.meta.MetaDataRepository.endConfiguration(MetaDataRepository.java:1463)
        at 
org.apache.openjpa.lib.conf.Configurations.configureInstance(Configurations.java:422)
        at 
org.apache.openjpa.lib.conf.Configurations.configureInstance(Configurations.java:347)
        at 
org.apache.openjpa.lib.conf.PluginValue.instantiate(PluginValue.java:99)
        at 
org.apache.openjpa.lib.conf.ObjectValue.instantiate(ObjectValue.java:70)
        at 
org.apache.openjpa.conf.OpenJPAConfigurationImpl.newMetaDataRepositoryInstance(OpenJPAConfigurationImpl.java:831)
        at 
org.apache.openjpa.enhance.PCEnhancer.run(PCEnhancer.java:3652)
        at 
org.apache.openjpa.enhance.PCEnhancer.run(PCEnhancer.java:3635)
        at 
org.apache.openjpa.enhance.PCEnhancer.main(PCEnhancer.java:3607)

[ERROR] --------------------
[INFO] ------------------------------------------------------------------------
[ERROR] BUILD ERROR
[INFO] ------------------------------------------------------------------------
[INFO] The OpenJPA Enhancer tool exited with a non-null exit code.
[INFO] ------------------------------------------------------------------------
[DEBUG] Trace
org.apache.maven.lifecycle.LifecycleExecutionException: The OpenJPA 
Enhancer tool exited with a non-null exit code.
        at 
org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoals(DefaultLifecycleExecutor.java:559)
        at 
org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeStandaloneGoal(DefaultLifecycleExecutor.java:488)
        at 
org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoal(DefaultLifecycleExecutor.java:458)
        at 
org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoalAndHandleFailures(DefaultLifecycleExecutor.java:306)
        at 
org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeTaskSegments(DefaultLifecycleExecutor.java:273)
        at 
org.apache.maven.lifecycle.DefaultLifecycleExecutor.execute(DefaultLifecycleExecutor.java:140)
        at 
org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:322)
        at org.apache.maven.DefaultMaven.execute(DefaultMaven.java:115)
        at org.apache.maven.cli.MavenCli.main(MavenCli.java:256)
        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:585)
        at 
org.codehaus.classworlds.Launcher.launchEnhanced(Launcher.java:315)
        at org.codehaus.classworlds.Launcher.launch(Launcher.java:255)
        at 
org.codehaus.classworlds.Launcher.mainWithExitCode(Launcher.java:430)
        at org.codehaus.classworlds.Launcher.main(Launcher.java:375)
Caused by: org.apache.maven.plugin.MojoExecutionException: The OpenJPA 
Enhancer tool exited with a non-null exit code.
        at 
org.codehaus.mojo.openjpa.OpenJpaEnhancerMojo.enhance(OpenJpaEnhancerMojo.java:194)
        at 
org.codehaus.mojo.openjpa.OpenJpaEnhancerMojo.execute(OpenJpaEnhancerMojo.java:88)
        at 
org.apache.maven.plugin.DefaultPluginManager.executeMojo(DefaultPluginManager.java:412)
        at 
org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoals(DefaultLifecycleExecutor.java:534)
        ... 16 more
[/snip]


----- Original Message ----- 
From: "Michael Dick" <michael.d.dick@gmail.com>
To: <open-jpa-dev@incubator.apache.org>
Sent: Monday, January 08, 2007 5:39 AM
Subject: Re: Missing ProductDerivation resource error


> Hi Rahul,
>
> It looks like the plugin is only adding the openjpa-kernel and 
> openjpa-lib
> jars to the classpath. Can you configure the plugin to use 
> openjpa-all? The
> the product derivations are aggregated in the openjpa-all jar file 
> which
> should resolve the missing resource problem.
>
>