Hello,
I am currently trying to override the settings in the persistence.xml
dynamically with my own hashmap. The background is, that I want to change the
datasource dynamically depending on where to persist the Entity.
Unfortunatley the factory does not seem to care for any values, that I am
trying to override. Did I miss anything?
My current code is as follows:
| @Stateless
| public class EJB3CampaignDAO extends EJB3BaseDAO implements CampaignDAO {
|
| @PersistenceUnit(unitName="testPersdb")
| EntityManagerFactory emf;
|
| .....
|
| public datacontainer.Campaign findSingleCampaign ( int id) {
|
| java.util.Map configOverride = new HashMap();
| configOverride.put("javax.persistence.provider",
"org.hibernate.ejb.HibernatePersistence");
| configOverride.put("javax.persistence.transactionType", "JTA");
| configOverride.put("javax.persistence.jtaDataSource",
"anotherDatasource_ccDS");
|
| EntityManager manager = emf.createEntityManager(configOverride);
|
And my persistence.xml looks like this
| <?xml version="1.0" encoding="UTF-8"?>
|
| <persistence>
| <persistence-unit name="testPersdb" transaction-type="JTA">
| <provider>org.hibernate.ejb.HibernatePersistence</provider>
| <jta-data-source>java:/aDatasource_ccDS</jta-data-source>
| <class>persistence.ejb3.entity.EJB3Campaign</class>
| </persistence-unit>
| </persistence>
|
If I´m trying to override the setting while creating the EntityManagerFactory I
get a very unexpected ClassCastException. So this way does not seem to work
either
| @Stateless
| public class EJB3CampaignDAO extends EJB3BaseDAO implements CampaignDAO {
|
| @PersistenceContext(unitName="testPersdb")
| private EntityManager manager;
| public datacontainer.Campaign findSingleCampaign ( int id) {
| System.out.println("findSingleCampaign " + id);
|
| java.util.Map configOverride = new HashMap();
| configOverride.put("javax.persistence.provider",
"org.hibernate.ejb.HibernatePersistence");
| configOverride.put("javax.persistence.transactionType", "JTA");
| configOverride.put("javax.persistence.jtaDataSource",
"anotherDatasource_ccDS");
| EntityManagerFactory emf =
Persistence.createEntityManagerFactory("testPersdb", configOverride);
| emf = Persistence.createEntityManagerFactory("testPersdb",
configOverride);
|
| manager = emf.createEntityManager();
|
This is how the Exception looks like
| javax.ejb.EJBTransactionRolledbackException:
javax.persistence.PersistenceException: java.lang.ClassCastException:
java.lang.String; nested exception is: javax.persistence.PersistenceException:
java.lang.ClassCastException: java.lang.String
| javax.persistence.PersistenceException: java.lang.ClassCastException:
java.lang.String
| at
org.hibernate.ejb.Ejb3Configuration.createEntityManagerFactory(Ejb3Configuration.java:188)
| at
org.hibernate.ejb.HibernatePersistence.createEntityManagerFactory(HibernatePersistence.java:110)
| at
javax.persistence.Persistence.createEntityManagerFactory(Persistence.java:37)
|
Is there anything wrong in the code or am I thinking totally wrong? Or is this
just a bug in the JBOSS EJB3-Implementation?
Any help is greatly appriciated
THank you
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