When is ObjectNotFoundException thrown in hibernate

nisha_laddha · **Joined:** Fri Jan 16, 2009 8:40 am **Posts:** 7

Hi,

I have a requirement wherein i need to query database via session.load() or session.get() & if no matching row exists , want to throw runtime exception.
I guess session.load() throws ObjectNotFoundException .Does session.get() throws this exception .
Also please suggest, in case i get HibernateException, which is a runtime exception,how can i show meaningful message to the user.

Thanks in advance

Nisha

ms · **Joined:** Wed Jan 25, 2006 10:18 am **Posts:** 28

session#get(...) does not throw an exception if there's no matching row, it returns null instead.

session#load(...) always returns an object and does not throw an exception until you try to invoke a method on that object.

How you show a meaningful message to your user in case no matching row is found is obviously completely specific to your application.
I would use get(...), then check for null, and if it's null then show a message.

psycotrompus · **Joined:** Thu Jul 06, 2006 11:09 pm **Posts:** 25

I totally disagree with this. I just encountered ONFE when using the Session.get() method.

Here is the main stack trace:

Code:

Caused by: org.hibernate.ObjectNotFoundException: No row with the given identifier exists: [entity.PkgGen#PkgGenId[trackNum=123,mpsNum=1]]
        at org.hibernate.impl.SessionFactoryImpl$2.handleEntityNotFound(SessionFactoryImpl.java:419)
        at org.hibernate.event.def.DefaultLoadEventListener.load(DefaultLoadEventListener.java:171)
        at org.hibernate.event.def.DefaultLoadEventListener.proxyOrLoad(DefaultLoadEventListener.java:223)
        at org.hibernate.event.def.DefaultLoadEventListener.onLoad(DefaultLoadEventListener.java:126)
        at org.hibernate.impl.SessionImpl.fireLoad(SessionImpl.java:906)
        at org.hibernate.impl.SessionImpl.internalLoad(SessionImpl.java:874)
        at org.hibernate.type.EntityType.resolveIdentifier(EntityType.java:590)
        at org.hibernate.type.EntityType.resolve(EntityType.java:412)
        at org.hibernate.engine.TwoPhaseLoad.initializeEntity(TwoPhaseLoad.java:139)
        at org.hibernate.loader.Loader.initializeEntitiesAndCollections(Loader.java:877)
        at org.hibernate.loader.Loader.doQuery(Loader.java:752)
        at org.hibernate.loader.Loader.doQueryAndInitializeNonLazyCollections(Loader.java:259)
        at org.hibernate.loader.Loader.loadEntity(Loader.java:1885)
        at org.hibernate.loader.entity.AbstractEntityLoader.load(AbstractEntityLoader.java:71)
        at org.hibernate.loader.entity.AbstractEntityLoader.load(AbstractEntityLoader.java:65)
        at org.hibernate.persister.entity.AbstractEntityPersister.load(AbstractEntityPersister.java:3062)
        at org.hibernate.event.def.DefaultLoadEventListener.loadFromDatasource(DefaultLoadEventListener.java:434)
        at org.hibernate.event.def.DefaultLoadEventListener.doLoad(DefaultLoadEventListener.java:415)
        at org.hibernate.event.def.DefaultLoadEventListener.load(DefaultLoadEventListener.java:165)
        at org.hibernate.event.def.DefaultLoadEventListener.proxyOrLoad(DefaultLoadEventListener.java:223)
        at org.hibernate.event.def.DefaultLoadEventListener.onLoad(DefaultLoadEventListener.java:126)
        at org.hibernate.impl.SessionImpl.fireLoad(SessionImpl.java:906)
        at org.hibernate.impl.SessionImpl.get(SessionImpl.java:843)
        at org.hibernate.impl.SessionImpl.get(SessionImpl.java:836)
        at org.springframework.orm.hibernate3.HibernateTemplate$1.doInHibernate(HibernateTemplate.java:531)
        at org.springframework.orm.hibernate3.HibernateTemplate.doExecute(HibernateTemplate.java:419)
        ... 52 more