[jboss-dev] How to fix vfs?

[Ales Justin]

Something fishy in JPA ...

The structure is like this:

* ejb_pkg_scope.ear
** ejb_pkg_scope.jap
*** META-INF
**** persistence.xml

<?xml version="1.0" encoding="UTF-8"?>
<persistence xmlns="http://java.sun.com/xml/ns/persistence" version="1.0">
<persistence-unit name="CTS-SCOPE-UNIT">
      <description>Persistence Unit for CTS EE Propagation Tests.
		  If the transaction-type is not specified,
		  the default is JTA.</description>
      <jta-data-source>jdbc/DB1</jta-data-source>
      <jar-file>lib/common.jar</jar-file>
</persistence-unit>
</persistence>

In our JPA we do this:

    public void start() throws Exception
    {
       log.info("Starting persistence unit " + kernelName);

       Properties props = new Properties();
       props.putAll(defaultPersistenceProperties);
       props.put(HibernatePersistence.JACC_CONTEXT_ID, getJaccContextId());

       List<URL> jarFiles = new ArrayList<URL>();
       Set<String> files = metaData.getJarFiles();
       if (files != null)
       {
          for (String jar : files)
          {
             jarFiles.add(getRelativeURL(jar));
          }
       }

       VirtualFile root = getPersistenceUnitRoot();
       log.debug("Persistence root: " + root);
       // hack the JPA url
       URL url = VFSUtils.getCompatibleURL(root);
       PersistenceUnitInfoImpl pi = new 
PersistenceUnitInfoImpl(metaData, props, di.getClassLoader(), url, 
jarFiles, initialContext);


    private URL getRelativeURL(String jar)
    {
       try
       {
          return new URL(jar);
       }
       catch (MalformedURLException e)
       {
          try
          {
             URL url = di.getFile("").toURL();
             return new URL(url, jar); <--- XXX
          }
          catch (Exception e1)
          {
             throw new RuntimeException("could not find relative path: " 
+ jar, e1);
          }
       }
    }

How should this know that it actually shouldn't go and look into .jar, 
but .ear instead?
Beats me ... as XXX clearly points to .jar's path.


Shelly McGowan wrote:
> 
> Ales,
> 
> The packaging of this .ear is testing the following assertion defined
> in the Persistence Specification:
> 
> One or more jar files may be specified using the jar-file elements
> instead of, or in addition to the mapping files specified in the
> mapping-files elements. If specified, these JAR files will be
> searched for managed persistence classes and any mapping metadata
> annotations found on them will be processed or they will be mapped
> using the mapping annotation defaults defined by this specification.
> **Such JAR files are specified relative to the root of the
> persistence unit.**
> 
> persistence.xml: <jar-file>lib/common.jar</jar-file>
> 
> The persistence unit is at the root of the .ear.
> 
> Shelly