[jboss-user] [EJB 3.0] - EntityManager must be access within a transaction -- Please
I am testing a session bean by a client.
and I keep getting this error, I know my code should work because
I wrote the same code last week.
this is the error
| xception in thread "main" javax.ejb.EJBTransactionRolledbackException:
EntityManager must be access within a transaction
| at org.jboss.ejb3.tx.Ejb3TxPolicy.handleInCallerTx(Ejb3TxPolicy.java:87)
| at org.jboss.aspects.tx.TxPolicy.invokeInCallerTx(TxPolicy.java:130)
| at org.jboss.aspects.tx.TxInterceptor$Required.invoke(TxInterceptor.java:195)
| at
org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)
| at
org.jboss.aspects.tx.TxPropagationInterceptor.invoke(TxPropagationInterceptor.java:76)
| at
org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)
| at
org.jboss.ejb3.stateless.StatelessInstanceInterceptor.invoke(StatelessInstanceInterceptor.java:62)
| at
org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)
| at
org.jboss.aspects.security.AuthenticationInterceptor.invoke(AuthenticationInterceptor.java:77)
| at
org.jboss.ejb3.security.Ejb3AuthenticationInterceptor.invoke(Ejb3AuthenticationInterceptor.java:106)
| at
org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)
| at
org.jboss.ejb3.ENCPropagationInterceptor.invoke(ENCPropagationInterceptor.java:46)
| at
org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)
| at
org.jboss.ejb3.asynchronous.AsynchronousInterceptor.invoke(AsynchronousInterceptor.java:106)
| at
org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)
| at
org.jboss.ejb3.stateless.StatelessContainer.dynamicInvoke(StatelessContainer.java:278)
| at org.jboss.aop.Dispatcher.invoke(Dispatcher.java:106)
| at
org.jboss.aspects.remoting.AOPRemotingInvocationHandler.invoke(AOPRemotingInvocationHandler.java:82)
| at org.jboss.remoting.ServerInvoker.invoke(ServerInvoker.java:734)
| at
org.jboss.remoting.transport.socket.ServerThread.processInvocation(ServerThread.java:560)
| at
org.jboss.remoting.transport.socket.ServerThread.dorun(ServerThread.java:369)
| at
org.jboss.remoting.transport.socket.ServerThread.run(ServerThread.java:165)
| Caused by: javax.persistence.TransactionRequiredException: EntityManager must be
access within a transaction
| at
org.jboss.ejb3.entity.ManagedEntityManagerFactory.verifyInTx(ManagedEntityManagerFactory.java:150)
|
This is my main ... all i want to do is add an object in an table
|
| public class KBClient {
|
| public static void main(String[] args) {
|
| KBClient c = new KBClient();
| ClassificationRemote r = c.lookupNewClassificationBean();
| KnowledgeBase first = new KnowledgeBase();
| first.setKnowledgeID(200);
| first.setKnowledgeName("AmerDemo");
| first.setKnowledgeCategory("Classification");
| first.setProjectID(new Project(88));
| first.setDeleted(0);
| r.addKnowledgeBase(first); //Exception occurs
| }
|
| private ClassificationRemote lookupNewClassificationBean() {
| try {
| Hashtable props = new Hashtable();
| props.put("java.naming.factory.initial",
"org.jnp.interfaces.NamingContextFactory");
| props.put("java.naming.factory.url.pkgs",
"org.jboss.naming:org.jnp.interfaces");
| props.put("java.naming.provider.url", "localhost");
| Context c = new InitialContext(props);
| return (ClassificationRemote)
c.lookup("ClassificationBeanFinal/remote");
| }
| catch(NamingException ne) {
| Logger.getLogger(getClass().getName()).log(Level.SEVERE,"exception
caught" ,ne);
| throw new RuntimeException(ne);
| }
| }
| }
|
|
and This is the function in the session bean
|
| @PersistenceContext private EntityManager em;
|
| public void addKnowledgeBase(KnowledgeBase kb){
| System.out.println("YAAAHOOOOOOO");
| em.persist(kb);
| }
|
I checked the JNDI tree as well ... everything is fine
the exception occurs when adding to the table in main.
Please help me !!!
Thanks
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