read-only cmp bean

[eprst]

Hi

I'm trying to figure out how to implement read-only CMP 2.0 bean in JBoss 4.x

My current attempt to define it like this doesn't work:

/**
 * ...
 * @jboss.read-only "true"
 */
public abstract class MyBean implements EntityBean {
//....
 /**
 * @ejb.pk-field
 * @ejb.persistence
 * @ejb.interface-method view-type="local"
 * @jboss.column-name "foo"
 */
 public abstract Long getFoo();

 public abstract void setFoo(Long newValue);
//...

 /**
 * @ejb:create-method
 * @ejb:transaction type="Required"
 */
 public MyPK ejbCreate(Long foo)
 throws CreateException {
 setFoo(foo); //throws exception

 return null;
 }
//...
}

This essentially results in this code in jbosscmp-jdbc.xml:

 <entity>
 <ejb-name>My</ejb-name>
 <read-only>true</read-only>
 <table-name>xxx</table-name>

 <cmp-field>
 <field-name>foo</field-name>
 <column-name>foo</column-name>
 </cmp-field>
etc

However, an attempt to create such beans leads to exception in JBoss 4.x:

Caused by: javax.ejb.EJBException: Field is read-only: fieldName=foo
 at org.jboss.ejb.plugins.cmp.jdbc.bridge.JDBCAbstractCMPFieldBridge.setValue(JDBCAbstractCMPFieldBridge.java:232)
 at org.jboss.ejb.plugins.cmp.bridge.EntityBridgeInvocationHandler$FieldSetInvoker.invoke(EntityBridgeInvocationHandler.java:170)
 at org.jboss.ejb.plugins.cmp.bridge.EntityBridgeInvocationHandler.invoke(EntityBridgeInvocationHandler.java:105)
 at org.jboss.proxy.compiler.Runtime.invoke(Runtime.java:76)
 at xxx.MyCMP$Proxy.setFoo(<generated>)
 at xxx.MyBean.ejbCreate(MyBean.java:114)

How am I supposed to create instances without calling set* methods from ejbCreate?

May be I'm wrong, but this piece in JDBCAbstractCMPFieldBridge.java looks suspicious:

 public void setValue(EntityEnterpriseContext ctx, Object value)
 {
 if(isReadOnly())
 {
 throw new EJBException("Field is read-only: fieldName=" + fieldName);
 }
 if(primaryKeyMember && JDBCEntityBridge.isEjbCreateDone(ctx))
 {
 throw new IllegalStateException("A CMP field that is a member " +
 "of the primary key can only be set in ejbCreate " +
 "[EJB 2.0 Spec. 10.3.5].");
 }

I'd expect it to be something along "if(isReadOnly() && !JDBCEntityBridge.isEjbCreateDone(ctx))". This souldn't mark an instance as dirty one of course.

[eprst]

I meant

if(isReadOnly() && JDBCEntityBridge.isEjbCreateDone(ctx))