3:28 p.m.
Hi All,
I am receiving the following error when trying to reference 2 Stateful Session beans
(TransactionPersistenceContext & ExtendedPersistenceContext):
--------------------------------------------------------------------------------------
Distributing D:\Test\EJB3ex511-client\dist\EJB3ex511-client.jar to
[org.jboss.deployment.spi.LocalhostTarget@13aaba1]
Deploying D:\Test\EJB3ex511-client\dist\EJB3ex511-client.jar
Deploying D:\Test\EJB3ex511-client\dist\EJB3ex511-client.jar
Applicaton Deployed
Operation start started
Operation start completed
run-deploy:
run-tool:
run-jar:
log4j:WARN No appenders could be found for logger
(org.jboss.security.SecurityAssociation).
log4j:WARN Please initialize the log4j system properly.
no cabin should be null: null
Master Suite
1
1
3
Updating detached cabin instance with new bed count of 4
Finding cabin to see it has been updated with a merge() on server
new bed count is: 4
javax.naming.NamingException: Could not dereference object [Root exception is
java.lang.reflect.UndeclaredThrowableException] at
org.jnp.interfaces.NamingContext.getObjectInstanceWrapFailure(NamingContext.java:1150)
at org.jnp.interfaces.NamingContext.lookup(NamingContext.java:705)
at org.jnp.interfaces.NamingContext.lookup(NamingContext.java:587)
at javax.naming.InitialContext.lookup(InitialContext.java:392)
at ejb3ex511client.Main.main(Main.java:50)
Caused by: java.lang.reflect.UndeclaredThrowableException
at $Proxy1.createProxy(Unknown Source)
at org.jboss.ejb3.JndiProxyFactory.getObjectInstance(JndiProxyFactory.java:52)
--------------------------------------------------------------------------------------
Here are the codes for 1 Stateless (TravelAgentBean - pre-requisite) & 1 Stateful
(TransactionPersistenceContextBean) session beans and a Client manipulating these beans:
@Stateless
| public class TravelAgentBean implements TravelAgentRemote
| {
| @PersistenceUnit(unitName="EJB3ex51") private EntityManagerFactory
factory;
| @PersistenceContext(unitName="EJB3ex51") private EntityManager manager;
|
| public void createCabin(Cabin cabin)
| {
| manager.persist(cabin);
| }
|
| public Cabin findCabin(int pKey)
| {
| return manager.find(Cabin.class, pKey);
| }
|
| public void updateCabin(Cabin cabin)
| {
| manager.merge(cabin);
| }
@Stateful
| public class TransactionPersistenceContextBean implements
TransactionPersistenceContextRemote
| {
| @PersistenceContext(unitName="titan",
type=PersistenceContextType.TRANSACTION)
| private EntityManager manager;
|
| private Cabin cabin;
|
| public void setCabin(int pk)
| {
| cabin = manager.find(Cabin.class, pk);
| }
|
| public void updateBedCount(int newBedCount)
| {
| cabin.setBedCount(newBedCount);
| }
|
| @Remove
| public void remove()
| {
| }
| }
public static void main(String[] args) {
|
| try
| {
| Context jndiContext = getInitialContext();
| Object ref =
jndiContext.lookup("travelagent.TravelAgentRemote");
| TravelAgentRemote dao = (TravelAgentRemote)ref;
|
| Cabin noCabin = dao.findCabin(1);
| System.out.println("no cabin should be null: " + noCabin);
|
| Cabin cabin_1 = new Cabin();
| cabin_1.setId(1);
| cabin_1.setName("Master Suite");
| cabin_1.setDeckLevel(1);
| cabin_1.setShipId(1);
| cabin_1.setBedCount(3);
|
| dao.createCabin(cabin_1);
|
| Cabin cabin_2 = dao.findCabin(1);
| System.out.println(cabin_2.getName());
| System.out.println(cabin_2.getDeckLevel());
| System.out.println(cabin_2.getShipId());
| System.out.println(cabin_2.getBedCount());
|
| System.out.println("Updating detached cabin instance with new bed count of
4");
| cabin_2.setBedCount(4);
| dao.updateCabin(cabin_2);
|
| System.out.println("Finding cabin to see it has been updated with a merge()
on server");
| Cabin cabin_3 = dao.findCabin(1);
| System.out.println("new bed count is: " + cabin_3.getBedCount());
|
| ref =
jndiContext.lookup("travelagent.TransactionPersistenceContextRemote");
| TransactionPersistenceContextRemote txBean =
(TransactionPersistenceContextRemote)ref;
|
| Cabin fetchedCabin = dao.findCabin(1);
| int oldBedCount = fetchedCabin.getBedCount();
|
| System.out.println("Set up transaction persistence context stateful
bean");
| txBean.setCabin(1);
| txBean.updateBedCount(5);
|
| fetchedCabin = dao.findCabin(1);
| System.out.println("Cabin bed count will still be " + oldBedCount +
": " + fetchedCabin.getBedCount());
|
| System.out.println("Set up extended persistence context stateful
bean");
|
| ref =
jndiContext.lookup("travelagent.ExtendedPersistenceContextRemote");
| ExtendedPersistenceContextRemote extendedBean =
(ExtendedPersistenceContextRemote)ref;
|
| extendedBean.setCabin(1);
| extendedBean.updateBedCount(5);
|
| fetchedCabin = dao.findCabin(1);
| System.out.println("Cabin bed count will be 5: " +
fetchedCabin.getBedCount());
|
| // cleanup
| txBean.remove();
| extendedBean.remove();
|
| }
| catch (javax.naming.NamingException ne)
| {
| ne.printStackTrace();
| }
| }
|
| public static Context getInitialContext()
| throws javax.naming.NamingException
| {
| return new javax.naming.InitialContext();
| }
I have tried to split the client into separate classes but the outcome is still the same.
I am running Netbeans 5.5, JBoss 4.0.5 AS on Windows XP platform.
I have struggled with this issue for many days after trying different method of deployment
including using both sun-appserver-pe9.0 & JBoss 4.0.5 AS without success.
This exercise is from workbook (ex05_1), title EJB 3.0 by Bill Burke.
Any assistance would be very much appreciated.
Thanks,
Henry
View the original post :
http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4019038#...
Reply to the post :
http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...