EntityManager is closed? why

[x490812]

using seam2.0.2sp1 on jboss4.2.0
I have an entityhome in which I set the Id and get the instance
here is relevent code:

@Name("taxSummaryHome")
@Restrict("#{identity.loggedIn}")
@Scope(value = ScopeType.SESSION)
public class TaxSummaryHome extends EntityHome<TaxSummary> {

     private static final long serialVersionUID = 1L;

     @Out(required = false, scope = ScopeType.SESSION)
     @In(required = false)     
     private SimpleSelection selectedTaxSummaryRows;

     public void setId(Object t)
     {
          super.setId(t);
          TaxSummary h = super.getInstance();
          System.out.println("\nSuperID: " + super.getId()  
                    + "\nID : " + h.getId() 
                    + "\nEntityMgrOpen: " + super.getEntityManager().isOpen() 
                    + "\nmanaged: "  + super.isManaged() 
                    + "\nIDDefined: " + super.isIdDefined());
     }

The Id is set via a richfaces a4j:support tag attached to a link:

<h:commandLink action="/tax_summary_item.xhtml" value="#{tax.id}">
<a4j:support event="onclick" action="#{taxSummaryHome.setId(tax.id)}"/>
</h:commandLink>

It is getting set correctly as the output of the method looks correct

SuperID: 55
ID : 55
EntityMgrOpen: true
managed: true
IDDefined: true

BUT, when I get to the linked page, and display the status of the entityHome entitymanager, it has changed and is now closed.

This code

Item# #{taxSummaryHome.instance.id}  #{taxSummaryHome.entityManager.open} xxx #{taxSummaryHome.idDefined} xxx #{taxSummaryHome.id} xxxxx

results in this display - notice entityManager.open is now false

Item# 55  xxx false xxx true xxx 55 xxxxx

1) since the entitymanager is closed, I get an exception using the {taxSummaryHome.managed} attribute in my xhtml page - This seems like a bug

2) it will not persist - I get

 javax.persistence.TransactionRequiredException: no transaction is in progress

Do I have to manually start the transaction, if so how, and why is the entityManager closed  when it moves from the method to the page display?

[pmuir]

Inject the EntityManager into your SESSION scoped home.

[jkronegg]

I had the same issue and added the following code to by EntityHome:

@In EntityManager entityManager;

@Override
public EntityManager getEntityManager() {
     return entityManager;
}

@Override
public void setEntityManager(EntityManager entityManager) {
     this.entityManager = entityManager;
}

Not really elegant but works.