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From "Jacob Nowosatka (Updated) (JIRA)" <>
Subject [jira] [Updated] (OPENJPA-302) PCEnhancer needs target classes on classpath!
Date Mon, 28 Nov 2011 21:27:40 GMT


Jacob Nowosatka updated OPENJPA-302:

    Attachment: OPENJPA-302.patch

The patch updates sections and to clarify that the target classes, openjpa
jars, and the persistence.xml need to added to the classpath when running the PCEnhancer.
The example in section has also been updated to show how these files can be added
to the classpath in the ant task.
> PCEnhancer needs target classes on classpath!
> ---------------------------------------------
>                 Key: OPENJPA-302
>                 URL:
>             Project: OpenJPA
>          Issue Type: Improvement
>          Components: docs
>    Affects Versions: 0.9.7
>         Environment: Eclipse
>            Reporter: Carl Smotricz
>            Priority: Minor
>         Attachments: OPENJPA-302.patch
> The documentation (sections, doesn't make it clear that the classes
to be enhanced need to be on the class path of the PCEnhancer application or Ant task. In
an Eclipse environment, I battled for some hours to get the enhancer to work.
> In my setup, the following appears to be true:
> * The application needs a classpath consisting of the OpenJPA libraries as well as the
java compilation destination directory for the compiled entity classes. Here's how I ran the
program (as an application) under Ant:
> 	<target name="enhance2">
> 		<java classpathref="JPA_PATH" classpath="build/classes" classname="org.apache.openjpa.enhance.PCEnhancer">
> 			<arg line="-d build/classes -p build/classes/META-INF/persistence.xml build/classes/com/smotricz/testjpa/Exit.class"/>
> 		</java>
> 	</target>
> * As an Ant task, the taskdef needs the OpenJPA libraries on its classpath, but it does
no good to include the compiled classes destination path there. Rather, the openjpa task will
accept a nested classpath element, and this classpath must contain both the OpenJPA libraries
and the compiled entity classes path. Here's my Ant target for this: 
> 	<target name="enhance">
> 		<taskdef name="openjpac" classname="org.apache.openjpa.ant.PCEnhancerTask" classpathref="JPA_PATH"/>
> 		<path id="ENH_PATH">
> 			<path refid="JPA_PATH"/>
> 			<path refid="CLASSES_PATH"/>
> 		</path>
> 		<openjpac directory="build/classes">
> 			<config propertiesFile="build/classes/META-INF/persistence.xml"/>
> 			<fileset dir="build/classes">
>     			    <include name="**/*.class"/>
>     		            <exclude name="**/TestJPA.class"/>
> 			</fileset>
> 			<classpath refid="ENH_PATH"/>
> 		</openjpac>
> 	</target>
> Hopefully augmenting the doc with some of this information will save other users some

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