Hi, all. I am trying to run Java Persistence from within an applet --
yes, from within an applet.
This is kind of urgent. If I can't get this to work, I'm going to have
to revert to JDBC.
The applet is loading derbycal.jar, which contains three Entity classes
and META-INF/persistence.xml.
When I run unit tests against derbycal standalone, Glassfish JPA is able
to find persistence.xml and runs fine (except that it keeps complaining
it can't find a suitable driver, but I can work on that).
When I run the applet, however, it says
javax.persistence.PersistenceException: No Persistence provider for
EntityManager named derbycal
at
javax.persistence.Persistence.createEntityManagerFactory(Persistence.java:89)
at
javax.persistence.Persistence.createEntityManagerFactory(Persistence.java:60)
at
org.apache.derbyDemo.derbyCalendar.RequestManager$1.run(RequestManager.java:41)
at java.security.AccessController.doPrivileged(Native Method)
at
org.apache.derbyDemo.derbyCalendar.RequestManager.<init>(RequestManager.java:38)
at
org.apache.derbyDemo.derbyCalendar.DerbyCalendarApplet.login(DerbyCalendarApplet.java:97)
In scanning this mailing list, it appears this is a classloading problem.
Does anyone know why the loader can't find META-INF/persistence.xml in
derbycal.jar when it's loaded within an applet? How would I tell the
applet classloader to look somewhere else? I tried putting it directly
into the codebase directory for the applet but that didn't work either.
Many thanks,
David