Hi!
I quite don't understand why I have to call em.refresh(entitybean) in every funtion of a stateful session bean that trys to modify bean values. Maybe someone can give me a pointer. This is my code (non-important columsn snipped)
Entity(access=AccessType.FIELD)
@Table(name="myentity")
public class MyEntity implements Serializable {
@Id(generate = GeneratorType.AUTO)
private Long id;
@Column
private Boolean seen;
// getters and setters ommitted
@Override
public boolean equals(Object o) {
if (o instanceof MyEntity) {
MyEntity p = (MyEntity) o;
if (p.getId().equals(this.getId()))
return true;
else
return false;
}
return false;
}
@Override
public int hashCode() {
return this.id.hashCode();
}
}
The stateful session bean is saving a local copy of the used MyEntity in its state:
@Stateful
@Remote
@SecurityDomain("other")
public class BusinessManagerBean implements BusinessManager, Serializable {
@PersistenceContext(unitName="mypersistencecontext")
EntityManager em;
private MyEntity entity;
// part of the remote interface
public boolean createNew() {
entity = new MyEntity();
entity.setValue(true);
em.persist(entity);
// the following change will automatically propagated to the database
entity.setValue(false);
return true;
}
// public remote interface function
public boolean doBusinessLogic() {
// em.refresh(entity);
// change not propagatec to database unless the above em.refresh() is commented out
entity.setValue(true);
return true;
}
}
The entity is not detached from the database (e.g. em.remove(entity) works flawlessly). However, I have no idea why I have to em.refresh() it each time.
(I tried adding em.flush() at various places with no success).
The above is only a small testcase of mine that still shows this behaviour. In reality, the MyEntity has a HUGE datagraph within ManyToMany/OneToMany relationships, and calling em.refresh() each time takes a copule of seconds, so as you can image it's inacceptible for me to call em.refresh() in every singe business function.
Thanks for any pointers.
Alex
