Hi,
I have a simple application which is trying to persist a simple Pojo.
I wish to use optimistic locking so I use the @Version tag in my Pojo.
Here is the POJO.

<PRE>

@Entity
@Table(name="TAddress")
@SequenceGenerator(name="ADDRESS_SEQ", sequenceName="SADDRESS", allocationSize=1)

public class Address {
private String city;
private String street;

@Version
private long version;

private int i = -1;

@Id
@GeneratedValue(strategy=GenerationType.SEQUENCE, generator="ADDRESS_SEQ")
public int getI() {
return i;
}


public void setI(int i) {
this.i = i;
}

public long getVersion() {
return version;
}

public void setVersion(long version) {
this.version = version;
}

public String getCity() {
return city;
}

public void setCity( String city) {
this.city = city;
}

public String getStreet() {
return street;
}

public void setStreet( String street) {
this.street = street;
}
}

</PRE>

However, no matter how many times I update and persist this POJO the version attribute always stays at zero. Hibernate does not increment it for me.

Here is an example of the code where I am trying to update:
<PRE>
public void testAddressVersions() {
// one address
System.out.println(">> testAddressVersions()");
EntityManagerFactory emf =
Persistence.createEntityManagerFactory("h-source");
EntityManager em = emf.createEntityManager();
Address address = new Address();
em.getTransaction().begin();
em.persist(address);
em.getTransaction().commit();

em.getTransaction().begin();
address.setCity("Paris2");
em.persist(address);
em.getTransaction().commit();

em.close();
emf.close();
}
</PRE>



Any help appreciated.

Your version annotation is on the field and your Id annotation is on a method. You can not mix annotation on field and on method.

Move your version annotation on the get method. It will work fine.

If you choose to put annotation on method, all the annotation on the field are ignored. (you can also put all your annotation on field but no mix)

Your version annotation is on the field and your Id annotation is on a method. You can not mix annotation on field and on method.

Move your version annotation on the get method. It will work fine.

If you choose to put annotation on method, all the annotation on the field are ignored. (you can also put all your annotation on field but no mix)

That's great, thanks for that, it worked.