/*
* Hibernate, Relational Persistence for Idiomatic Java
*
* Copyright (c) 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.cfg.search;
import org.jboss.logging.Logger;
import org.hibernate.AnnotationException;
import org.hibernate.engine.spi.SessionFactoryImplementor;
import org.hibernate.event.spi.EventType;
import org.hibernate.event.spi.PostCollectionRemoveEventListener;
import org.hibernate.event.spi.PostCollectionUpdateEventListener;
import org.hibernate.event.spi.PostDeleteEventListener;
import org.hibernate.event.spi.PostInsertEventListener;
import org.hibernate.internal.CoreMessageLogger;
import org.hibernate.cfg.Configuration;
import org.hibernate.event.spi.PostCollectionRecreateEventListener;
import org.hibernate.event.spi.PostUpdateEventListener;
import org.hibernate.integrator.spi.Integrator;
import org.hibernate.internal.util.config.ConfigurationHelper;
import org.hibernate.service.classloading.spi.ClassLoaderService;
import org.hibernate.event.service.spi.DuplicationStrategy;
import org.hibernate.event.service.spi.EventListenerRegistry;
import org.hibernate.service.spi.SessionFactoryServiceRegistry;
/**
* Integrates Hibernate Search into Hibernate Core by registering its needed listeners
* <p/>
* The note on the original (now removed) org.hibernate.cfg.search.HibernateSearchEventListenerRegister class indicated
* that Search now uses a new means for this. However that signature is relying on removed classes...
*
* @author Emmanuel Bernard
* @author Hardy Ferentschik
* @author Steve Ebersole
*/
public class HibernateSearchIntegrator implements Integrator {
private static final CoreMessageLogger LOG = Logger.getMessageLogger(CoreMessageLogger.class, HibernateSearchIntegrator.class.getName() );
public static final String AUTO_REGISTER = "hibernate.search.autoregister_listeners";
public static final String LISTENER_CLASS = "org.hibernate.search.event.FullTextIndexEventListener";
@Override
public void integrate(
Configuration configuration,
SessionFactoryImplementor sessionFactory,
SessionFactoryServiceRegistry serviceRegistry) {
final boolean registerListeners = ConfigurationHelper.getBoolean( AUTO_REGISTER, configuration.getProperties(), false );
if ( !registerListeners ) {
LOG.debug( "Skipping search event listener auto registration" );
return;
}
final Class listenerClass = loadSearchEventListener( serviceRegistry );
if ( listenerClass == null ) {
LOG.debug( "Skipping search event listener auto registration - could not fid listener class" );
return;
}
final Object listener = instantiateListener( listenerClass );
EventListenerRegistry listenerRegistry = serviceRegistry.getService( EventListenerRegistry.class );
listenerRegistry.addDuplicationStrategy( new DuplicationStrategyImpl( listenerClass ) );
listenerRegistry.getEventListenerGroup( EventType.POST_INSERT ).appendListener( (PostInsertEventListener) listener );
listenerRegistry.getEventListenerGroup( EventType.POST_UPDATE ).appendListener( (PostUpdateEventListener) listener );
listenerRegistry.getEventListenerGroup( EventType.POST_DELETE ).appendListener( (PostDeleteEventListener) listener );
listenerRegistry.getEventListenerGroup( EventType.POST_COLLECTION_RECREATE ).appendListener( (PostCollectionRecreateEventListener) listener );
listenerRegistry.getEventListenerGroup( EventType.POST_COLLECTION_REMOVE ).appendListener( (PostCollectionRemoveEventListener) listener );
listenerRegistry.getEventListenerGroup( EventType.POST_COLLECTION_UPDATE ).appendListener( (PostCollectionUpdateEventListener) listener );
}
private Class loadSearchEventListener(SessionFactoryServiceRegistry serviceRegistry) {
try {
return serviceRegistry.getService( ClassLoaderService.class ).classForName( LISTENER_CLASS );
}
catch (Exception e) {
return null;
}
}
private Object instantiateListener(Class listenerClass) {
try {
return listenerClass.newInstance();
}
catch (Exception e) {
throw new AnnotationException( "Unable to instantiate Search event listener", e );
}
}
public static class DuplicationStrategyImpl implements DuplicationStrategy {
private final Class checkClass;
public DuplicationStrategyImpl(Class checkClass) {
this.checkClass = checkClass;
}
@Override
public boolean areMatch(Object listener, Object original) {
// not isAssignableFrom since the user could subclass
return checkClass == original.getClass() && checkClass == listener.getClass();
}
@Override
public Action getAction() {
return Action.KEEP_ORIGINAL;
}
}
@Override
public void disintegrate(SessionFactoryImplementor sessionFactory, SessionFactoryServiceRegistry serviceRegistry) {
// nothing to do here afaik
}
}