EntityManager returns null from @PersistenceContext
I am unable to successfully create an EntityManager (returns null) using:
- jboss 4.0.3RC1
- operating system: Win2K
- database: MS SQL Server 2k
Tried to apply concepts in the EJB3 turorials, and scanned the forums for last 3 days, and tried many different configs/suggestions, but no success... any help is appreciated!
***
Configuration/Code details follow:
- the entity-manager/name configured within persistence.xml is "bgsdb" and is used as the PersistenceContext unitName (code fragment shown later); the EntityManager appears to be established based upon server.log information (again, fragment provided below)
- standardjaws.xml and standardjbosscmp-jdbc.xml are configured to use MS SQL Server (server.log confirms that it can connect)
- mssql-ds.xml appears configured properly (within deploy directory)
*** persistence.xml (start) ***
<entity-manager>
bgsdb
org.hibernate.ejb.HibernatePersistence
<jta-data-source>java:/MSSQLDS</jta-data-source>
</entity-manager>
*** persistence.xml (end) ***
Note: the class (code fragment below) is instantiated within a stateless session bean ("execute" method is called from this stateless session bean)
*** Code fragment (start) ***
package com.....
import javax.persistence.EntityManager;
import javax.persistence.PersistenceContext;
public class CLITest {
@PersistenceContext(unitName="bgsdb")
EntityManager em;
public String execute()
throws com.brodagroup.exception.XException {
System.out.println( "emb: CLITest started........");
System.out.println( "emb: em: " + em );
System.out.println( "emb: em (string): " + em.toString() );
:
:
:
:
}
}
*** Code fragment (end) ***
Upon executing the code, the EntityManager returned is null (expert from server.log is listed below)
*** server.log - error (start) ***
2005-08-04 22:37:25,015 INFO [STDOUT] emb: CLITest started........
2005-08-04 22:37:25,015 INFO [STDOUT] emb: em: null
2005-08-04 22:37:25,015 INFO [STDOUT] javax.ejb.EJBException: null; CausedByException is:
null
2005-08-04 22:37:25,015 INFO [STDOUT] at org.jboss.ejb3.tx.Ejb3TxPolicy.handleExceptionInOurTx(Ejb3TxPolicy.java:46)...........
*** server.log - error (end) ***
*** server.log - EntityManager appears configured (start) ***
2005-08-04 22:28:54,180 INFO [org.jboss.ejb3.Ejb3Module] Create EntityManager with JNDI name: bgsdb
*** server.log - EntityManager appears configured (end) ***
*** server.log - SQL SERVER connection established (start) ***
2005-08-04 22:28:52,037 INFO [org.hibernate.connection.DatasourceConnectionProvider] Using datasource: java:/MSSQLDS
*** server.log - SQL SERVER connection established (end) ***