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/*
* Hibernate, Relational Persistence for Idiomatic Java
*
* Copyright (c) 2008, Red Hat Middleware LLC 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 Middleware LLC.
*
* 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.action;
import java.io.Serializable;
import org.hibernate.AssertionFailure;
import org.hibernate.HibernateException;
import org.hibernate.cache.CacheKey;
import org.hibernate.cache.access.SoftLock;
import org.hibernate.engine.EntityEntry;
import org.hibernate.engine.EntityKey;
import org.hibernate.engine.PersistenceContext;
import org.hibernate.engine.SessionImplementor;
import org.hibernate.event.PostDeleteEvent;
import org.hibernate.event.PostDeleteEventListener;
import org.hibernate.event.PreDeleteEvent;
import org.hibernate.event.PreDeleteEventListener;
import org.hibernate.event.EventSource;
import org.hibernate.persister.entity.EntityPersister;
public final class EntityDeleteAction extends EntityAction {
private final Object version;
private final boolean isCascadeDeleteEnabled;
private final Object[] state;
private SoftLock lock;
public EntityDeleteAction(
final Serializable id,
final Object[] state,
final Object version,
final Object instance,
final EntityPersister persister,
final boolean isCascadeDeleteEnabled,
final SessionImplementor session) {
super( session, id, instance, persister );
this.version = version;
this.isCascadeDeleteEnabled = isCascadeDeleteEnabled;
this.state = state;
}
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.getCacheAccessStrategy().lockItem( 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();
persistenceContext.removeEntity( entry.getEntityKey() );
persistenceContext.removeProxy( entry.getEntityKey() );
if ( persister.hasCache() ) {
persister.getCacheAccessStrategy().remove( ck );
}
postDelete();
if ( getSession().getFactory().getStatistics().isStatisticsEnabled() && !veto ) {
getSession().getFactory().getStatisticsImplementor().deleteEntity( getPersister().getEntityName() );
}
}
private boolean preDelete() {
PreDeleteEventListener[] preListeners = getSession().getListeners().getPreDeleteEventListeners();
boolean veto = false;
if (preListeners.length>0) {
PreDeleteEvent preEvent = new PreDeleteEvent( getInstance(), getId(), state, getPersister() ,(EventSource) getSession() );
for ( int i = 0; i < preListeners.length; i++ ) {
veto = preListeners[i].onPreDelete(preEvent) || veto;
}
}
return veto;
}
private void postDelete() {
PostDeleteEventListener[] postListeners = getSession().getListeners()
.getPostDeleteEventListeners();
if (postListeners.length>0) {
PostDeleteEvent postEvent = new PostDeleteEvent(
getInstance(),
getId(),
state,
getPersister(),
(EventSource) getSession()
);
for ( int i = 0; i < postListeners.length; i++ ) {
postListeners[i].onPostDelete(postEvent);
}
}
}
private void postCommitDelete() {
PostDeleteEventListener[] postListeners = getSession().getListeners()
.getPostCommitDeleteEventListeners();
if (postListeners.length>0) {
PostDeleteEvent postEvent = new PostDeleteEvent(
getInstance(),
getId(),
state,
getPersister(),
(EventSource) getSession()
);
for ( int i = 0; i < postListeners.length; i++ ) {
postListeners[i].onPostDelete(postEvent);
}
}
}
public void doAfterTransactionCompletion(boolean success, SessionImplementor session) throws HibernateException {
if ( getPersister().hasCache() ) {
final CacheKey ck = new CacheKey(
getId(),
getPersister().getIdentifierType(),
getPersister().getRootEntityName(),
getSession().getEntityMode(),
getSession().getFactory()
);
getPersister().getCacheAccessStrategy().unlockItem( ck, lock );
}
postCommitDelete();
}
protected boolean hasPostCommitEventListeners() {
return getSession().getListeners().getPostCommitDeleteEventListeners().length > 0;
}
}
