[hibernate-issues] [Hibernate-JIRA] Closed: (HHH-1266) StatelessSession can implement refresh

[Steve Ebersole (JIRA)]

     [ http://opensource.atlassian.com/projects/hibernate/browse/HHH-1266?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Steve Ebersole closed HHH-1266.
-------------------------------


Closing stale resolved issues

> StatelessSession can implement refresh
> --------------------------------------
>
>                 Key: HHH-1266
>                 URL: http://opensource.atlassian.com/projects/hibernate/browse/HHH-1266
>             Project: Hibernate Core
>          Issue Type: Improvement
>          Components: core
>    Affects Versions: 3.1
>            Reporter: Barthel Steckemetz
>            Assignee: Steve Ebersole
>            Priority: Minor
>             Fix For: 3.2.0.cr2
>
>   Original Estimate: 1h
>  Remaining Estimate: 1h
>
> The refresh method in StatelessSession is missing.
> I took the following implementation from DefaultRefreshEventListener onRefresh
> and modified it. As the stateless Session does not support collection loading,
> proxies and eviction the relevant lines are commented.
> StatelessSessionImpl:
> 	public void refresh(Object object) throws HibernateException {
> 		refresh(object, LockMode.READ);
> 	}
> 	
> 	//  code taken from DefaultRefreshEventListener onRefresh
> 	public void refresh( Object obj, LockMode lockMode ) throws HibernateException {
> 		final AbstractSessionImpl source = this;
> 		
> //		not applicable in stateless session: if ( source.getPersistenceContext().reassociateIfUninitializedProxy( obj ) ) return;
> 		final Object object = obj; // BST source.getPersistenceContext().unproxyAndReassociate( obj );
> //		not applicable in stateless session:
> //		if ( refreshedAlready.containsKey(object) ) {
> //			log.trace("already refreshed");
> //			return;
> //		}
> 		final EntityEntry e = source.getPersistenceContext().getEntry( object );
> 		final EntityPersister persister;
> 		final Serializable id;
> 		Log log = LogFactory.getLog(this.getClass());
> 		
> 		if ( e == null ) {
> 			persister = source.getEntityPersister(null, object); //refresh() does not pass an entityName
> 			id = persister.getIdentifier( object, getEntityMode() );
> 			if ( log.isTraceEnabled() ) {
> 				log.trace(
> 						"refreshing transient " +
> 						MessageHelper.infoString( persister, id, source.getFactory() )
> 					);
> 			}
> 			EntityKey key = new EntityKey( id, persister, source.getEntityMode() );
> 			if ( source.getPersistenceContext().getEntry(key) != null ) {
> 				throw new PersistentObjectException(
> 						"attempted to refresh transient instance when persistent instance was already associated with the Session: " +
> 						MessageHelper.infoString(persister, id, source.getFactory() )
> 					);
> 			}
> 		}
> 		else {
> 			if ( log.isTraceEnabled() ) {
> 				log.trace(
> 						"refreshing " +
> 						MessageHelper.infoString( e.getPersister(), e.getId(), source.getFactory()  )
> 					);
> 			}
> 			if ( !e.isExistsInDatabase() ) {
> 				throw new HibernateException( "this instance does not yet exist as a row in the database" );
> 			}
> 			persister = e.getPersister();
> 			id = e.getId();
> 		}
> 		// cascade the refresh prior to refreshing this entity
> //		not applicable in stateless session: refreshedAlready.put(object, object);
> //		new Cascade(CascadingAction.REFRESH, Cascade.BEFORE_REFRESH, source)
> //				.cascade( persister, object, refreshedAlready );
> 		if ( e != null ) {
> 			EntityKey key = new EntityKey( id, persister, source.getEntityMode() );
> 			source.getPersistenceContext().removeEntity(key);
> //			not applicable in stateless session: if ( persister.hasCollections() ) new EvictVisitor( source ).process(object, persister);
> 		}
> 		if ( persister.hasCache() ) {
> 			final CacheKey ck = new CacheKey(
> 					id,
> 					persister.getIdentifierType(),
> 					persister.getRootEntityName(),
> 					source.getEntityMode(), 
> 					source.getFactory()
> 				);
> 			persister.getCache().remove(ck);
> 		}
> 		
> //		not applicable in stateless session:		evictCachedCollections( persister, id, source.getFactory() );
> 		
> 		String previousFetchProfile = source.getFetchProfile();
> 		source.setFetchProfile("refresh");
> 		Object result = persister.load( id, object, lockMode, source );
> 		source.setFetchProfile(previousFetchProfile);
> 		
> 		UnresolvableObjectException.throwIfNull( result, id, persister.getEntityName() );
> 	}

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