No. This would be the case with an entity bean but not a stateful session
bean. You can, however, have the bean implement the SessionSynchronization
interface so that you are aware of the outcome of a transaction can use the
memento pattern to roll the bean's state back the way it was before the
transaction started.
public class MySession implements javax.ejb.SessionBean,
javax.ejb.SessionSynchronization{
public StateHolder state;
public StateHolder memento;
public void afterBegin( ) {
memento = state;
}
public void afterCompletion( boolean committed){
if( ! committed){
state = memento; // roll back state
}
memento = null; // less to passivate outside of a transaction
}
}
public class StateHolder implements java.io.Serializable{
public int id;
public String name;
public Employee empBean;
}
Note: The assumption here is that server is smart enough to preserving things
like a bean reference within the StateHolder.
Richard
--
Richard Monson-Haefel
EJB Expert for jGuru.com
( http://www.jguru.com )
Author of Enterprise JavaBeans
Published by O'Reilly & Associates
( http://www.ejbnow.com )
"Kiely, Conor" wrote:
> Question: Does the container have any responsibilities for managing the
> state
> of attributes in a stateful session bean where a transaction might roll
> back ?
>
> I'm not talking about serializing the state on passivation.
> I'm talking about attributes modified within (say) a TX_REQUIRED
> method, which rolls back after the attribute state has been updated.
>
> Can/should the container restore the pre-transaction attribute state ?
> I can't see mention of this (or maybe I'm not 'getting' it), but it
> would be 'nice'.
>
> Conor.
>
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