Java Code Examples for org.hibernate.persister.entity.EntityPersister#hasCache()

private boolean isCached(
		EntityKey entityKey,
		EntityPersister persister,
		EntityMode entityMode) {
	if ( persister.hasCache() ) {
		CacheKey key = new CacheKey(
				entityKey.getIdentifier(),
				persister.getIdentifierType(),
				entityKey.getEntityName(),
				entityMode,
				context.getSession().getFactory()
		);
		return persister.getCache().getCache().get( key ) != null;
	}
	return false;
}
 

public void afterTransactionCompletion(boolean success) throws CacheException {
	EntityPersister persister = getPersister();
	if ( persister.hasCache() ) {
		
		final CacheKey ck = new CacheKey( 
				getId(), 
				persister.getIdentifierType(), 
				persister.getRootEntityName(), 
				getSession().getEntityMode(), 
				getSession().getFactory() 
			);
		
		if ( success && cacheEntry!=null /*!persister.isCacheInvalidationRequired()*/ ) {
			boolean put = persister.getCache().afterUpdate(ck, cacheEntry, nextVersion, lock );
			
			if ( put && getSession().getFactory().getStatistics().isStatisticsEnabled() ) {
				getSession().getFactory().getStatisticsImplementor()
						.secondLevelCachePut( getPersister().getCache().getRegionName() );
			}
		}
		else {
			persister.getCache().release(ck, lock );
		}
	}
	postCommitUpdate();
}
 

/** 
 * If the class to be loaded has been configured with a cache, then lock
 * given id in that cache and then perform the load.
 *
 * @return The loaded entity
 * @throws HibernateException
 */
protected Object lockAndLoad(
	final LoadEvent event, 
	final EntityPersister persister,
	final EntityKey keyToLoad, 
	final LoadEventListener.LoadType options,
	final SessionImplementor source) 
throws HibernateException {
	
	CacheConcurrencyStrategy.SoftLock lock = null;
	final CacheKey ck;
	if ( persister.hasCache() ) {
		ck = new CacheKey( 
				event.getEntityId(), 
				persister.getIdentifierType(), 
				persister.getRootEntityName(), 
				source.getEntityMode(), 
				source.getFactory() 
			);
		lock = persister.getCache().lock(ck, null );
	}
	else {
		ck = null;
	}

	Object entity;
	try {
		entity = load(event, persister, keyToLoad, options);
	}
	finally {
		if ( persister.hasCache() ) {
			persister.getCache().release(ck, lock );
		}
	}

	Object proxy = event.getSession().getPersistenceContext()
			.proxyFor( persister, keyToLoad, entity );
	
	return proxy;
}
 

public void evictEntity(String entityName, Serializable id) throws HibernateException {
	EntityPersister p = getEntityPersister(entityName);
	if ( p.hasCache() ) {
		if ( log.isDebugEnabled() ) {
			log.debug( "evicting second-level cache: " + MessageHelper.infoString(p, id, this) );
		}
		CacheKey cacheKey = new CacheKey( id, p.getIdentifierType(), p.getRootEntityName(), EntityMode.POJO, this );
		p.getCache().remove( cacheKey );
	}
}
 

public void evictEntity(String entityName) throws HibernateException {
	EntityPersister p = getEntityPersister(entityName);
	if ( p.hasCache() ) {
		if ( log.isDebugEnabled() ) {
			log.debug( "evicting second-level cache: " + p.getEntityName() );
		}
		p.getCache().clear();
	}
}
 

public void evict(Class persistentClass, Serializable id) throws HibernateException {
	EntityPersister p = getEntityPersister( persistentClass.getName() );
	if ( p.hasCache() ) {
		if ( log.isDebugEnabled() ) {
			log.debug( "evicting second-level cache: " + MessageHelper.infoString(p, id, this) );
		}
		CacheKey cacheKey = new CacheKey( id, p.getIdentifierType(), p.getRootEntityName(), EntityMode.POJO, this );
		p.getCache().remove( cacheKey );
	}
}
 

public void evict(Class persistentClass) throws HibernateException {
	EntityPersister p = getEntityPersister( persistentClass.getName() );
	if ( p.hasCache() ) {
		if ( log.isDebugEnabled() ) {
			log.debug( "evicting second-level cache: " + p.getEntityName() );
		}
		p.getCache().clear();
	}
}
 

/** Create an action that will evict collection and entity regions based on queryspaces (table names).
 *  TODO: cache the autodetected information and pass it in instead.
 **/
public BulkOperationCleanupAction(SessionImplementor session, Set querySpaces) {
	this.session = session;

	Set tmpSpaces = new HashSet(querySpaces);
	SessionFactoryImplementor factory = session.getFactory();
	Iterator iterator = factory.getAllClassMetadata().entrySet().iterator();
	while ( iterator.hasNext() ) {
		Map.Entry entry = (Map.Entry) iterator.next();
		String entityName = (String) entry.getKey();
		EntityPersister persister = factory.getEntityPersister( entityName );
		Serializable[] entitySpaces = persister.getQuerySpaces();

		if (affectedEntity( querySpaces, entitySpaces )) {
			if ( persister.hasCache() ) {
				affectedEntityNames.add( persister.getEntityName() );
			}
			Set roles = session.getFactory().getCollectionRolesByEntityParticipant( persister.getEntityName() );
			if ( roles != null ) {
				affectedCollectionRoles.addAll( roles );
			}
			for ( int y = 0; y < entitySpaces.length; y++ ) {
				tmpSpaces.add( entitySpaces[y] );
			}
		}

	}
	this.spaces = (Serializable[]) tmpSpaces.toArray( new Serializable[tmpSpaces.size()] );		
}
 

/**
 * Performs a pessimistic lock upgrade on a given entity, if needed.
 *
 * @param object The entity for which to upgrade the lock.
 * @param entry The entity's EntityEntry instance.
 * @param requestedLockMode The lock mode being requested for locking.
 * @param source The session which is the source of the event being processed.
 * @throws HibernateException
 */
protected void upgradeLock(Object object, EntityEntry entry, LockMode requestedLockMode, SessionImplementor source)
throws HibernateException {

	if ( requestedLockMode.greaterThan( entry.getLockMode() ) ) {
		// The user requested a "greater" (i.e. more restrictive) form of
		// pessimistic lock

		if ( entry.getStatus() != Status.MANAGED ) {
			throw new ObjectDeletedException(
					"attempted to lock a deleted instance",
					entry.getId(),
					entry.getPersister().getEntityName()
			);
		}

		final EntityPersister persister = entry.getPersister();

		if ( log.isTraceEnabled() )
			log.trace(
					"locking " +
					MessageHelper.infoString( persister, entry.getId(), source.getFactory() ) +
					" in mode: " +
					requestedLockMode
			);

		final CacheConcurrencyStrategy.SoftLock lock;
		final CacheKey ck;
		if ( persister.hasCache() ) {
			ck = new CacheKey( 
					entry.getId(), 
					persister.getIdentifierType(), 
					persister.getRootEntityName(), 
					source.getEntityMode(), 
					source.getFactory() 
			);
			lock = persister.getCache().lock( ck, entry.getVersion() );
		}
		else {
			ck = null;
			lock = null;
		}
		
		try {
			if ( persister.isVersioned() && requestedLockMode == LockMode.FORCE ) {
				// todo : should we check the current isolation mode explicitly?
				Object nextVersion = persister.forceVersionIncrement(
						entry.getId(), entry.getVersion(), source
				);
				entry.forceLocked( object, nextVersion );
			}
			else {
				persister.lock( entry.getId(), entry.getVersion(), object, requestedLockMode, source );
			}
			entry.setLockMode(requestedLockMode);
		}
		finally {
			// the database now holds a lock + the object is flushed from the cache,
			// so release the soft lock
			if ( persister.hasCache() ) {
				persister.getCache().release(ck, lock );
			}
		}

	}
}
 

/**
 * Attempts to load the entity from the second-level cache.
 *
 * @param event The load event
 * @param persister The persister for the entity being requested for load
 * @param options The load options.
 * @return The entity from the second-level cache, or null.
 * @throws HibernateException
 */
protected Object loadFromSecondLevelCache(
		final LoadEvent event,
		final EntityPersister persister,
		final LoadEventListener.LoadType options) throws HibernateException {
	
	final SessionImplementor source = event.getSession();
	
	final boolean useCache = persister.hasCache() && 
		source.getCacheMode().isGetEnabled() && 
		event.getLockMode().lessThan(LockMode.READ);
	
	if (useCache) {
		
		final SessionFactoryImplementor factory = source.getFactory();
		
		final CacheKey ck = new CacheKey( 
				event.getEntityId(), 
				persister.getIdentifierType(), 
				persister.getRootEntityName(),
				source.getEntityMode(), 
				source.getFactory()
			);
		Object ce = persister.getCache()
			.get( ck, source.getTimestamp() );
		
		if ( factory.getStatistics().isStatisticsEnabled() ) {
			if (ce==null) {
				factory.getStatisticsImplementor().secondLevelCacheMiss( 
					persister.getCache().getRegionName() 
				);
			}
			else {
				factory.getStatisticsImplementor().secondLevelCacheHit( 
					persister.getCache().getRegionName() 
				);
			}
		}

		if ( ce != null ) {

			CacheEntry entry = (CacheEntry) persister.getCacheEntryStructure()
					.destructure(ce, factory);
		
			// Entity was found in second-level cache...
			return assembleCacheEntry(
					entry,
					event.getEntityId(),
					persister,
					event
				);
		}
	}
	
	return null;
}
 

public void refresh(String entityName, Object entity, LockMode lockMode) {
		final EntityPersister persister = this.getEntityPersister( entityName, entity );
		final Serializable id = persister.getIdentifier( entity, getEntityMode() );
		if ( log.isTraceEnabled() ) {
			log.trace(
					"refreshing transient " +
					MessageHelper.infoString( persister, id, this.getFactory() )
			);
		}
		// TODO : can this ever happen???
//		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() )
//			);
//		}

		if ( persister.hasCache() ) {
			final CacheKey ck = new CacheKey(
					id,
			        persister.getIdentifierType(),
			        persister.getRootEntityName(),
			        this.getEntityMode(),
			        this.getFactory()
			);
			persister.getCache().remove(ck);
		}

		String previousFetchProfile = this.getFetchProfile();
		Object result = null;
		try {
			this.setFetchProfile( "refresh" );
			result = persister.load( id, entity, lockMode, this );
		}
		finally {
			this.setFetchProfile( previousFetchProfile );
		}
		UnresolvableObjectException.throwIfNull( result, id, persister.getEntityName() );
	}
 

public void execute() throws HibernateException {
	Serializable id = getId();
	EntityPersister persister = getPersister();
	SessionImplementor session = getSession();
	Object instance = getInstance();

	boolean veto = preDelete();

	Object version = this.version;
	if ( persister.isVersionPropertyGenerated() ) {
		// we need to grab the version value from the entity, otherwise
		// we have issues with generated-version entities that may have
		// multiple actions queued during the same flush
		version = persister.getVersion( instance, session.getEntityMode() );
	}

	final CacheKey ck;
	if ( persister.hasCache() ) {
		ck = new CacheKey( 
				id, 
				persister.getIdentifierType(), 
				persister.getRootEntityName(), 
				session.getEntityMode(), 
				session.getFactory() 
			);
		lock = persister.getCache().lock(ck, version);
	}
	else {
		ck = null;
	}

	if ( !isCascadeDeleteEnabled && !veto ) {
		persister.delete( id, version, instance, session );
	}
	
	//postDelete:
	// After actually deleting a row, record the fact that the instance no longer 
	// exists on the database (needed for identity-column key generation), and
	// remove it from the session cache
	final PersistenceContext persistenceContext = session.getPersistenceContext();
	EntityEntry entry = persistenceContext.removeEntry( instance );
	if ( entry == null ) {
		throw new AssertionFailure( "possible nonthreadsafe access to session" );
	}
	entry.postDelete();

	EntityKey key = new EntityKey( entry.getId(), entry.getPersister(), session.getEntityMode() );
	persistenceContext.removeEntity(key);
	persistenceContext.removeProxy(key);
	
	if ( persister.hasCache() ) persister.getCache().evict(ck);

	postDelete();

	if ( getSession().getFactory().getStatistics().isStatisticsEnabled() && !veto ) {
		getSession().getFactory().getStatisticsImplementor()
				.deleteEntity( getPersister().getEntityName() );
	}
}
 

private boolean isCachePutEnabled(EntityPersister persister, SessionImplementor session) {
	return persister.hasCache() && 
			!persister.isCacheInvalidationRequired() && 
			session.getCacheMode().isPutEnabled();
}