[jboss-user] [EJB 3.0] - entityManager is null

[LGSW_Sam]

Hi!
using jbossas 4.0.5.ga-ejb3 and hibernate 3.2.

I keep getting nullPointer exception with this class. I have checked that entityManager is null.

same kind of injecting the PersistenceContext works fine with several other classes..

I have tried without unitName but we have several persistence units so that wont work.


Can anyone help me to find the cause?


  | package fi.logiasoftware.messageserver.services.backend;
  | 
  | import java.util.List;
  | 
  | import javax.ejb.Local;
  | import javax.ejb.Remote;
  | import javax.ejb.Stateless;
  | import javax.ejb.TransactionAttribute;
  | import javax.ejb.TransactionAttributeType;
  | import javax.persistence.EntityManager;
  | import javax.persistence.PersistenceContext;
  | 
  | import org.jboss.annotation.ejb.LocalBinding;
  | import org.jboss.annotation.ejb.RemoteBinding;
  | 
  | import fi.logiasoftware.messageserver.config.ActionException;
  | import fi.logiasoftware.messageserver.config.Destination;
  | 
  | @Stateless
  | @RemoteBinding(jndiBinding = "ActionExceptionHandling")
  | @LocalBinding(jndiBinding = "ActionExceptionHandlingLocal")
  | @Remote(ActionExceptionHandling.class)
  | @Local(ActionExceptionHandling.class)
  | @TransactionAttribute(TransactionAttributeType.REQUIRED)
  | public class ActionExceptionHandlingBean implements ActionExceptionHandling {
  | 
  | 	@PersistenceContext(unitName = "MessageServer")
  | 	private EntityManager entityManager;
  | 	
  | 	private ActionException ae;
  | 	private List<ActionException> ActionExceptions;
  | 	
  | 	public void setActionException(String filename, Destination destination, String hash){		
  | 		ae = new ActionException();
  | 		ae.setDestination(destination);
  | 		ae.setFilename(filename);
  | 		ae.setHash(hash);
  | 		entityManager.persist(ae);
  | 	}
  | 	
  | 	
  | 	@SuppressWarnings("unchecked")
  | 	public List<ActionException> getActionExceptions(){
  | 		System.out.println("getActionExceptions ploo");
  | 		
  | 		if(entityManager != null) {
  | 		ActionExceptions =  entityManager.createQuery("from ActionException a order by a.id").getResultList();
  | 		System.out.println("getActionExceptions loppuu");
  | 		} else {
  | 		System.out.println("entityManager on null");
  | 		}
  | 
  | 		return ActionExceptions;
  | 	}
  | 	
  | 	public void removeActionException(ActionException a){
  | 		entityManager.remove(a);
  | 	}
  | 	
  | }
  | 

persistence.xml


  | <persistence-unit name="MessageServer" transaction-type="jta">
  | 
  |     <provider>org.hibernate.ejb.HibernatePersistence</provider>
  |     <jta-data-source>java:/MessageServicesDS</jta-data-source>
  |    
  |     <properties>
  |       <property name="hibernate.dialect">org.hibernate.dialect.MySQLInnoDBDialect</property>
  |       <!-- property name="hibernate.hbm2ddl.auto" value="create"/ -->
  |       <property name="hibernate.session_factory_name" value="ServiceConfig"/>
  |       <property name="hibernate.transaction.manager_lookup_class" value="org.hibernate.transaction.JBossTransactionManagerLookup"/>
  |       <property name="hibernate.jdbc.use_get_generated_keys" value="true"/>
  |       <property name="hibernate.order_updates" value="true"/>
  |       <property name="hibernate.jdbc.batch_versioned_data" value="true"/>
  |       <property name="jta.UserTransaction" value="UserTransaction"/>
  |       <property name="hibernate.current_session_context_class" value="jta"/>
  |       <property name="hibernate.query.jpaql_strict_compliance" value="false"/>
  |       <property name="hibernate.show_sql" value="false"/>
  |       <property name="hibernate.format_sql" value="true"/>
  |       <property name="jboss.entity.manager.factory.jndi.name" value="java:/EntityManagerFactory"/>
  |       <property name="jboss.entity.manager.jndi.name" value="java:/EntityManager"/>
  |       <property name="hibernate.connection.release_mode" value="auto"/>
  |       <!-- property name="hibernate.cache.provider_class" value="org.hibernate.cache.OptimisticTreeCacheProvider"/ -->
  | 	  <!-- property name="hibernate.treecache.mbean.object_name" value="jboss.cache:service=EJB3EntityTreeCache"/ -->
  | 	  <!-- property name="hibernate.transaction.auto_close_session" value="true"/ -->	  
  | 	  <!-- property name="hibernate.cache.use_query_cache" value="true"/ -->	  
  |     </properties>
  |     
  |     <!-- property name="hibernate.ejb.cfgfile" value="/hibernate.cfg.xml"/ -->
  |   </persistence-unit>
  | 

Br,
Sami Männistö

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