/*
* Hibernate, Relational Persistence for Idiomatic Java
*
* Copyright (c) 2010, Red Hat, Inc. and/or its affiliates 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.search.backend.impl.jgroups;
import java.util.List;
import java.util.Properties;
import java.util.concurrent.locks.Lock;
import java.util.concurrent.locks.ReentrantLock;
import org.jgroups.Receiver;
import org.hibernate.search.spi.WorkerBuildContext;
import org.hibernate.search.util.logging.impl.Log;
import org.hibernate.search.util.logging.impl.LoggerFactory;
import org.hibernate.search.backend.IndexingMonitor;
import org.hibernate.search.backend.LuceneWork;
import org.hibernate.search.backend.impl.lucene.LuceneBackendQueueProcessor;
import org.hibernate.search.engine.spi.SearchFactoryImplementor;
import org.hibernate.search.indexes.impl.DirectoryBasedIndexManager;
/**
* Backend factory used in JGroups clustering mode in master node.
* Wraps {@link LuceneBackendQueueProcessor} with providing extra
* functionality to receive Lucene works from slave nodes.
*
* @author Lukasz Moren
* @see org.hibernate.search.backend.impl.lucene.LuceneBackendQueueProcessor
* @see org.hibernate.search.backend.impl.jgroups.SlaveJGroupsBackendQueueProcessor
*/
public class MasterJGroupsBackendQueueProcessor extends JGroupsBackendQueueProcessor {
private static final Log log = LoggerFactory.make();
private LuceneBackendQueueProcessor luceneBackendQueueProcessor;
private Receiver masterListener;
@Override
public void initialize(Properties props, WorkerBuildContext context, DirectoryBasedIndexManager indexManager) {
super.initialize( props, context, indexManager );
initLuceneBackendQueueProcessor( props, context );
registerMasterListener( context.getUninitializedSearchFactory() );
}
private void registerMasterListener(SearchFactoryImplementor searchFactory) {
//register JGroups receiver in master node to get Lucene docs from slave nodes
masterListener = new JGroupsMasterMessageListener( searchFactory );
channel.setReceiver( masterListener );
}
private void initLuceneBackendQueueProcessor(Properties props, WorkerBuildContext context) {
luceneBackendQueueProcessor = new LuceneBackendQueueProcessor();
luceneBackendQueueProcessor.initialize( props, context, indexManager );
}
public Receiver getMasterListener() {
return masterListener;
}
@Override
public void close() {
super.close();
luceneBackendQueueProcessor.close();
}
@Override
public void applyWork(List<LuceneWork> workList, IndexingMonitor monitor) {
if ( workList == null ) {
throw new IllegalArgumentException( "workList should not be null" );
}
luceneBackendQueueProcessor.applyWork( workList, monitor );
}
@Override
public void applyStreamWork(LuceneWork singleOperation, IndexingMonitor monitor) {
luceneBackendQueueProcessor.applyStreamWork( singleOperation, monitor );
}
@Override
public Lock getExclusiveWriteLock() {
log.warnSuspiciousBackendDirectoryCombination( indexName );
return new ReentrantLock(); // keep the invoker happy, still it's useless
}
}