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
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