Hi,

I'm trying to create a new "group" object in my database which contains a "SportletRoleList" set.

My mapping file for SportletGroup looks like:

<hibernate-mapping>
<class
name="org.gridlab.gridsphere.portlet.impl.SportletGroup"
table="sportletgroup"
>

<id
name="oid"
column="gsoid"
type="java.lang.String"
length="32"
>
<generator class="uuid.hex"/>

</id>

<property name="Name" type="string" column="name"/>
<property name="Public" type="boolean" column="ispublic"/>

<set name="portletRoleList" table="portletrolelist" cascade="all">
<key column="role_oid"/>
<many-to-many column="role_info" class="org.gridlab.gridsphere.portlet.impl.SportletRoleInfo"/>
</set>


</class>
</hibernate-mapping>

and mapping for SportletRoleInfo is:

<hibernate-mapping>
<class
name="org.gridlab.gridsphere.portlet.impl.SportletRoleInfo"
table="portletroleinfo"
>

<id
name="oid"
column="gsoid"
type="java.lang.String"
length="32"
>
<generator class="uuid.hex"/>

</id>

<property name="PortletClass" type="string" column="portletclass"/>
<property name="Role" type="string" column="portletrole"/>

</class>
</hibernate-mapping>

My Java code looks like:

public PortletGroup createGroup(String groupName, Set portletRoleList) {
SportletGroup group = getSportletGroupByName(groupName);
if (group == null) {
group = new SportletGroup();
group.setName(groupName);
group.setPublic(true);
group.setPortletRoleList(portletRoleList);
Transaction tx = null;
Session session = null;
try {
session = factory.openSession();
tx = session.beginTransaction();
tx.saveObject(group)

} catch (Exception e) {
String msg = "Error creating group " + groupName;
if (tx != null) {
tx.rollback();
} finally {
session.close();
}
}
return group;
}


and then I get the following stack trace:


104646 [http8080-Processor4] (SportletLog.java:138) ERROR org.gridlab.gridsphere.core.persistence.hibernate.PersistenceManagerRdbmsImpl - Could not complete transaction: net.sf.hibernate.NonUniqueObjectException: a different object with the same identifier value was already associated with the session: , of class: org.gridlab.gridsphere.portlet.impl.SportletRoleInfo
net.sf.hibernate.NonUniqueObjectException: a different object with the same identifier value was already associated with the session: , of class: org.gridlab.gridsphere.portlet.impl.SportletRoleInfo
at net.sf.hibernate.impl.SessionImpl.checkUniqueness(SessionImpl.java:1666)
at net.sf.hibernate.impl.SessionImpl.doUpdateMutable(SessionImpl.java:1435)
at net.sf.hibernate.impl.SessionImpl.doUpdate(SessionImpl.java:1462)
at net.sf.hibernate.impl.SessionImpl.saveOrUpdate(SessionImpl.java:1385)


Any help is greatly appreciated, thanks Jason

Could be a little off here... but i don't see hibernate transaction having a "saveObject(obj) " method on it.

Hib Code typically looks like :

sess.save(new object)
tx.commit();

what is the diffference betwen this:

Group g = new Group();
sessi.save(g);

and

sess.save(new Group());

I don't think there is any...

Jason,
there is no difference, I was just wondering what
tx.saveObject is... since I don't see the transaction object having that method...

James

Whoops I'm sorry-- that should be just save() not saveObject. Basically do you have any idea what exactly a NonUniqueObjectException is and how that happens maybe?

Thanks Jason

Perhaps you need to set a unsaved-value. I use database sequences but all my ids look like the following.




Notice the unsave-value="-1". Witout this Hibernate doesn't know to generate a id for the new object and I get errors like yours.

Jason,
Typically i've seen this when essentially exactly what the error message states is happening. SOmehow, an object with the same identifier is loaded twice, but they are not == (the same pointer).

I'd look into your identifier strategy... potentially you also don't have the key properly defined also...

I've never used the hex uuid thing... so i can't help much there.

Good luck.
James