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/*
* Hibernate, Relational Persistence for Idiomatic Java
*
* Copyright (c) 2008-2011, Red Hat Inc. or third-party contributors as
* indicated by the @author tags or express copyright attribution
* statements applied by the authors. All third-party contributions are
* distributed under license by Red Hat Inc.
*
* This copyrighted material is made available to anyone wishing to use, modify,
* copy, or redistribute it subject to the terms and conditions of the GNU
* Lesser General Public License, as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License
* for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this distribution; if not, write to:
* Free Software Foundation, Inc.
* 51 Franklin Street, Fifth Floor
* Boston, MA 02110-1301 USA
*/
package org.hibernate.event.internal;
import java.io.Serializable;
import java.util.Map;
import org.jboss.logging.Logger;
import org.hibernate.HibernateException;
import org.hibernate.action.internal.CollectionRecreateAction;
import org.hibernate.action.internal.CollectionRemoveAction;
import org.hibernate.action.internal.CollectionUpdateAction;
import org.hibernate.action.internal.QueuedOperationCollectionAction;
import org.hibernate.collection.spi.PersistentCollection;
import org.hibernate.engine.internal.Cascade;
import org.hibernate.engine.internal.Collections;
import org.hibernate.engine.spi.ActionQueue;
import org.hibernate.engine.spi.CascadingAction;
import org.hibernate.engine.spi.CollectionEntry;
import org.hibernate.engine.spi.CollectionKey;
import org.hibernate.engine.spi.EntityEntry;
import org.hibernate.engine.spi.PersistenceContext;
import org.hibernate.engine.spi.SessionImplementor;
import org.hibernate.engine.spi.Status;
import org.hibernate.event.service.spi.EventListenerRegistry;
import org.hibernate.event.spi.EventSource;
import org.hibernate.event.spi.EventType;
import org.hibernate.event.spi.FlushEntityEvent;
import org.hibernate.event.spi.FlushEntityEventListener;
import org.hibernate.event.spi.FlushEvent;
import org.hibernate.internal.CoreMessageLogger;
import org.hibernate.internal.util.EntityPrinter;
import org.hibernate.internal.util.collections.IdentityMap;
import org.hibernate.internal.util.collections.LazyIterator;
import org.hibernate.persister.entity.EntityPersister;
/**
* A convenience base class for listeners whose functionality results in flushing.
*
* @author Steve Ebersole
*/
public abstract class AbstractFlushingEventListener implements Serializable {
private static final CoreMessageLogger LOG = Logger.getMessageLogger( CoreMessageLogger.class, AbstractFlushingEventListener.class.getName() );
// ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
// Pre-flushing section
// ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/**
* Coordinates the processing necessary to get things ready for executions
* as db calls by preping the session caches and moving the appropriate
* entities and collections to their respective execution queues.
*
* @param event The flush event.
* @throws HibernateException Error flushing caches to execution queues.
*/
protected void flushEverythingToExecutions(FlushEvent event) throws HibernateException {
LOG.trace( "Flushing session" );
EventSource session = event.getSession();
final PersistenceContext persistenceContext = session.getPersistenceContext();
session.getInterceptor().preFlush( new LazyIterator( persistenceContext.getEntitiesByKey() ) );
prepareEntityFlushes( session, persistenceContext );
// we could move this inside if we wanted to
// tolerate collection initializations during
// collection dirty checking:
prepareCollectionFlushes( persistenceContext );
// now, any collections that are initialized
// inside this block do not get updated - they
// are ignored until the next flush
persistenceContext.setFlushing( true );
try {
int entityCount = flushEntities( event, persistenceContext );
int collectionCount = flushCollections( session, persistenceContext );
event.setNumberOfEntitiesProcessed( entityCount );
event.setNumberOfCollectionsProcessed( collectionCount );
}
finally {
persistenceContext.setFlushing(false);
}
//some statistics
logFlushResults( event );
}
@SuppressWarnings( value = {"unchecked"} )
private void logFlushResults(FlushEvent event) {
if ( !LOG.isDebugEnabled() ) {
return;
}
final EventSource session = event.getSession();
final PersistenceContext persistenceContext = session.getPersistenceContext();
LOG.debugf(
"Flushed: %s insertions, %s updates, %s deletions to %s objects",
session.getActionQueue().numberOfInsertions(),
session.getActionQueue().numberOfUpdates(),
session.getActionQueue().numberOfDeletions(),
persistenceContext.getNumberOfManagedEntities()
);
LOG.debugf(
"Flushed: %s (re)creations, %s updates, %s removals to %s collections",
session.getActionQueue().numberOfCollectionCreations(),
session.getActionQueue().numberOfCollectionUpdates(),
session.getActionQueue().numberOfCollectionRemovals(),
persistenceContext.getCollectionEntries().size()
);
new EntityPrinter( session.getFactory() ).toString(
persistenceContext.getEntitiesByKey().entrySet()
);
}
/**
* process cascade save/update at the start of a flush to discover
* any newly referenced entity that must be passed to saveOrUpdate(),
* and also apply orphan delete
*/
private void prepareEntityFlushes(EventSource session, PersistenceContext persistenceContext) throws HibernateException {
LOG.debug( "Processing flush-time cascades" );
final Object anything = getAnything();
//safe from concurrent modification because of how concurrentEntries() is implemented on IdentityMap
for ( Map.Entry