why not the passivation in entity bean
Ok. I was a bit too simplistic with my words. Entity beans
are passivated as well but it means a different thing for entity beans than for stateful session beans.
Passivating an entity bean means that the EJB container is done with the instance and it is going back to being an anonymous member of the "free pool". Activation on the other hand is taking an anonymous member and giving it an identity (unique record in the database). Note that there is no
state to persist here, only the data which is handled by ejbLoad() and ejbStore().