Problem with CMR (1:1)

[aragorn94]

I have problem with CMR fields (no problem on deploy) : errors at runtime when calling setter or getter methods on a CMR field.

I tried to resolved the problem from other thread in forum but didn't find the trick (i think my deployment file are correct).

The relation is a 1:1 between a User en a UserInfo

The generated tables are :
user ( email, password, info)
userinfo ( infoid, dept, firstname, lastname, ...)

Here is the relation in ejb-jar.xml :

<ejb-relation >
<ejb-relation-name>UserHasUserInfo</ejb-relation-name>
<!-- bidirectional -->
<ejb-relationship-role >
<ejb-relationship-role-name>UserHasUserInfo</ejb-relationship-role-name>
One
<relationship-role-source >
<ejb-name>User</ejb-name>
</relationship-role-source>
<cmr-field >
<cmr-field-name>userInfo</cmr-field-name>
</cmr-field>
</ejb-relationship-role>
<ejb-relationship-role >
<ejb-relationship-role-name>UserInfoPartOfUser</ejb-relationship-role-name>
One
<cascade-delete/>
<relationship-role-source >
<ejb-name>UserInfo</ejb-name>
</relationship-role-source>
</ejb-relationship-role>
</ejb-relation>


Here is the relation in jbooscmp-jdbc.xml :


<ejb-relation>
<ejb-relation-name>UserHasUserInfo</ejb-relation-name>
<foreign-key-mapping/>
<ejb-relationship-role>
<ejb-relationship-role-name>UserHasUserInfo</ejb-relationship-role-name>
<key-fields/>

</ejb-relationship-role>
<ejb-relationship-role>
<ejb-relationship-role-name>UserInfoPartOfUser</ejb-relationship-role-name>
<key-fields>
<key-field>
<field-name>infoId</field-name>
<column-name>info</column-name>
</key-field>
</key-fields>

</ejb-relationship-role>
</ejb-relation>



Source calling EJB :

User user = userHome.create(email, password);
UserInfo info = infoHome.create(firstName, middleName,
lastName, email, dept, workPhone, extention,
homePhone, isEmployee);
user.setUserInfo(info); // Here is the error

Beginning of trace :

17:05:26,259 ERROR [LogInterceptor] TransactionRolledbackException, causedBy:java.lang.ClassCastException
at org.jboss.ejb.plugins.cmp.jdbc.bridge.JDBCCMRFieldBridge.setInstanceValue(JDBCCMRFieldBridge.java:551)
at org.jboss.ejb.plugins.cmp.jdbc.bridge.JDBCCMRFieldBridge.setValue(JDBCCMRFieldBridge.java:483)
at org.jboss.ejb.plugins.cmp.bridge.EntityBridgeInvocationHandler.invoke(EntityBridgeInvocationHandler.java:126)
at org.jboss.proxy.compiler.Runtime.invoke(Runtime.java:59)
at fr.free.banks.UserCMP$Proxy.setUserInfo()
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:324)
at org.jboss.ejb.EntityContainer$ContainerInterceptor.invoke(EntityContainer.java:1194)
at org.jboss.ejb.plugins.cmp.jdbc.JDBCRelationInterceptor.invoke(JDBCRelationInterceptor.java:95)
at org.jboss.ejb.plugins.EntitySynchronizationInterceptor.invoke(EntitySynchronizationInterceptor.java:297)
at org.jboss.resource.connectionmanager.CachedConnectionInterceptor.invoke(CachedConnectionInterceptor.java:186)
at org.jboss.ejb.plugins.EntityReentranceInterceptor.invoke(EntityReentranceInterceptor.java:90)
at org.jboss.ejb.plugins.EntityInstanceInterceptor.invoke(EntityInstanceInterceptor.java:163)
at org.jboss.ejb.plugins.EntityLockInterceptor.invoke(EntityLockInterceptor.java:107)
at org.jboss.ejb.plugins.EntityCreationInterceptor.invoke(EntityCreationInterceptor.java:69)
at org.jboss.ejb.plugins.AbstractTxInterceptor.invokeNext(AbstractTxInterceptor.java:107)
at org.jboss.ejb.plugins.TxInterceptorCMT.runWithTransactions(TxInterceptorCMT.java:178)
at org.jboss.ejb.plugins.TxInterceptorCMT.invoke(TxInterceptorCMT.java:60)
at org.jboss.ejb.plugins.SecurityInterceptor.invoke(SecurityInterceptor.java:130)
at org.jboss.ejb.plugins.LogInterceptor.invoke(LogInterceptor.java:204)
at org.jboss.ejb.EntityContainer.invoke(EntityContainer.java:493)
at org.jboss.ejb.Container.invoke(Container.java:712)
at org.jboss.ejb.EntityContainer.invoke(EntityContainer.java:1058)
at org.jboss.mx.server.MBeanServerImpl.invoke(MBeanServerImpl.java:517)
at org.jboss.invocation.local.LocalInvoker.invoke(LocalInvoker.java:98)
at org.jboss.invocation.InvokerInterceptor.invoke(InvokerInterceptor.java:102)
at org.jboss.proxy.TransactionInterceptor.invoke(TransactionInterceptor.java:77)
at org.jboss.proxy.SecurityInterceptor.invoke(SecurityInterceptor.java:80)
at org.jboss.proxy.ejb.EntityInterceptor.invoke(EntityInterceptor.java:116)
at org.jboss.proxy.ClientContainer.invoke(ClientContainer.java:76)
at $Proxy81.setUserInfo(Unknown Source)
at fr.free.banks.UserManagementBean.addUser(UserManagementBean.java:94)

[loïcs]

I think your EJB 'UserInfo' should be a Local one.
I have heard that JBoss CMR (with CMP 2.0) can only deal with the local interfaces of EJBs.

All my EJBs follow this rule and everythink's ok for me.

[aragorn94]

You're right !
It's working now. (i've changed my two entity beans User
and UserInfo - they are accessed by a session Bean UserManagement)

Thanks

[mynt]

I have a problem regarding this example.
The method .setUserInfo(userInfo) works just fine, but .getUserInfo() doesn't. What I really don't understand is the fact that I don't even have an exception, the code just blocks.

Both User and UserInfo beans are local, and reentrant flag is true.

Thx

[aragorn94]

To be exact, it's in EJB/CMP 2.0 Specs to work with local interface when accessing CMR fields, so it's not a restriction of JBoss

[aragorn94]

Mynt, can you post sample code or some trace ?

I plan to write a tutorial on this sample (it fully works now) for JBoss using Eclipse and Lomboz plugin, EJBDoclet (with code assist), describing plugins i've installed.

Original tutorial is from Rick Hightower : http://www.rickhightower.com/ejbcmpcmrtut.html, perhaps it can help you

[mynt]

Here is the method in question:
public UserValue[] getUsersInfo() {
try{
ArrayList userList = new ArrayList(50);
System.out.println("before findAll");
Collection collection = userHome.findAll();
System.out.println("after findAll count:" + collection.size());
Iterator iterator = collection.iterator();
int i=0;
while(iterator.hasNext()){
System.out.println("pas i ="+ i++);
UserLocal user = (UserLocal)iterator.next();
System.out.println("user" + user);
UserInfoLocal info = user.getUserInfo();//here where it stops
System.out.println("userinfo" + info);
UserValue userValue = new UserValue(user.getEmail());
copyUserInfo(userValue, info);
userList.add(userValue);
}
System.out.println("userList created");
return (UserValue[])
userList.toArray(new UserValue[userList.size()]);

} catch (FinderException e){
throw new EJBException
("Unable to get list of users ", e);
}
catch(Exception e){
throw new EJBException("Some exception", e);
}
}

On the server output:
before findAll
after findAll count:4
pas i =0
userjava:comp/partone/User [e-mail]

On the client here's what he says:

java.rmi.RemoteException: java.rmi.RemoteException: timeout expired waiting for an instance; nested exception is:
java.rmi.RemoteException: timeout expired waiting for an instance

java.rmi.RemoteException: timeout expired waiting for an instance


Thx

[aragorn94]

No problem with this part of code : it's work for me with the same.

Give more code (bean User an UserInfo and relation content of ejb-jar jbosscmp-jdbc files)

Have you check the content of table after call to setUserInfo ?