Hi.
Please help:
I have written a SSB that uses the @PersistenceContext annotation:
anonymous wrote : @Stateless
| public class TopicEditAction implements TopicEdit {
|
| private Topic topic;
| @PersistenceContext(unitName = "pfe")
| EntityManager em;
| ...
| public String add() {
| System.out.println("try adding a topic...");
| if(em==null)System.out.println("em is null");
| em.persist(topic);
| System.out.println("added topic...");
| this.topic=new Topic();
| return "editTopic";
| }
When the "add" method is executed the output on the console is:
anonymous wrote : 21:50:19,174 INFO [STDOUT] try adding a topic...
| 21:50:19,174 INFO [STDOUT] em is null
| 21:50:19,174 ERROR [[Faces Servlet]] Servlet.service() for servlet Faces
Servlet threw exception
| javax.faces.FacesException: Error calling action method of component with
id _tagId2:_tagId5
| at
org.apache.myfaces.application.ActionListenerImpl.processAction(ActionListenerImpl.java:74)
| at javax.faces.component.UICommand.broadcast(UICommand.java:106)
| at
javax.faces.component.UIViewRoot._broadcastForPhase(UIViewRoot.java:90)
| at
javax.faces.component.UIViewRoot.processApplication(UIViewRoot.java:164)
| at
org.apache.myfaces.lifecycle.LifecycleImpl.invokeApplication(LifecycleImpl.java:271)
| at
org.apache.myfaces.lifecycle.LifecycleImpl.execute(LifecycleImpl.java:86)
| at javax.faces.webapp.FacesServlet.service(FacesServlet.java:94)
| at
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:252)
| at
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
| at
org.apache.myfaces.component.html.util.ExtensionsFilter.doFilter(ExtensionsFilter.java:122)
| at
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:202)
| at
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
| at
org.jboss.web.tomcat.filters.ReplyHeaderFilter.doFilter(ReplyHeaderFilter.java:81)
| at
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:202)
| at
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
| at
org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:213)
| at
org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:178)
| at
org.jboss.web.tomcat.security.CustomPrincipalValve.invoke(CustomPrincipalValve.java:39)
| at
org.jboss.web.tomcat.security.SecurityAssociationValve.invoke(SecurityAssociationValve.java:159)
| at
org.jboss.web.tomcat.security.JaccContextValve.invoke(JaccContextValve.java:59)
| at
org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:126)
| at
org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:105)
| at
org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:107)
| at
org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:148)
| at
org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:856)
| at
org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.processConnection(Http11Protocol.java:744)
| at
org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket(PoolTcpEndpoint.java:527)
| at
org.apache.tomcat.util.net.MasterSlaveWorkerThread.run(MasterSlaveWorkerThread.java:112)
| at java.lang.Thread.run(Thread.java:595)
| Caused by: javax.faces.el.EvaluationException: /addTopic.xhtml @21,69
action="#{topiceditaction.add}": java.lang.NullPointerException
| at
com.sun.facelets.el.LegacyMethodBinding.invoke(LegacyMethodBinding.java:73)
| at
org.apache.myfaces.application.ActionListenerImpl.processAction(ActionListenerImpl.java:63)
| ... 28 more
| Caused by: java.lang.NullPointerException
| at
org.jboss.projects.performance.actions.TopicEditAction.add(TopicEditAction.java:44)
| at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
| at
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
| at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
| at java.lang.reflect.Method.invoke(Method.java:585)
| at com.sun.el.parser.AstValue.invoke(AstValue.java:130)
| at com.sun.el.MethodExpressionImpl.invoke(MethodExpressionImpl.java:274)
| at
com.sun.facelets.el.TagMethodExpression.invoke(TagMethodExpression.java:68)
| at
com.sun.facelets.el.LegacyMethodBinding.invoke(LegacyMethodBinding.java:69)
| ... 29 more
My persistence.xml:
anonymous wrote : <entity-manager>
| pfe
| org.hibernate.ejb.HibernatePersistence
| <jta-data-source>java:/projectDS</jta-data-source>
|
|
|
|
| </entity-manager>
I'm using jboss4.0.3SP1 and EJB3.0_RC3. The EAR deploys fine, I think.
No errors and the schema creates as expected.
Any suggestion are very appreciated.
Regards
Dirk
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