I work on a RCP using openJPA and Derby. It works fine. Kann I see your RCP (and Plugin) Source?
Bye Marco ----- Original Message ----- Da : Rüdiger Herrmann <[EMAIL PROTECTED]> A : [email protected] Oggetto : JPA: adding entities to EntityManagerFactory programmatically Data : Tue, 27 May 2008 23:49:16 +0200 > Hi, > > using OpenJPA in a JavaSE (Eclipse RCP) environment, I > would like to register JPA-annotated classes that will > participate in the persistence mechanism at runtime. > > Background: > Presistence-aware classes are contributed via Eclipse > Extension Points. All these classes have JPA annotations. > > Furthermore I don't want to use class enhancement as I > don't have control over the VM startup parameters (like > -javaagent) in which the application is running in. > Though there seems to be an effort to make class > enhancement optional ([1]), I couldn't find further > information on how to disable class enhancement. > > I played around with the attached code (persist one > instance of class Person that has no further > dependencies/references) but I couldn't get it to work. > > The various attempts resulted either in > Attempt to cast instance "...Person..." to > PersistenceCapable failed. Ensure that it > has been enhanced. > or > The type "class org.example.openjpatest.Person" > has not been enhanced. > depending on wether I called > MetaDataRepository#addMetaData() or > MetaDataRepository#addPersistenceAware() (no idea what the > difference is) and wether I called mernge() before > persist(). > > If desired I can send the full (Eclipse) project with all > required jars (HSQL, OpenJPA plus dependencies, JTA) that > runs out-of-the-box. > > > Thanks in advance > Rüdiger > > [1] https://issues.apache.org/jira/browse/OPENJPA-293 > > > > [Allegato : NoEnhancerExample.java] > [Allegato : Person.java] ....
