/*
* 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;
import java.util.List;
import java.util.Map;
import java.util.Properties;
import org.hibernate.search.Environment;
import org.hibernate.search.backend.LuceneWork;
import org.hibernate.search.backend.spi.Work;
import org.hibernate.search.engine.spi.EntityIndexBinder;
import org.hibernate.search.store.IndexShardingStrategy;
import org.hibernate.search.util.configuration.impl.ConfigurationParseHelper;
import org.hibernate.search.util.logging.impl.Log;
import org.hibernate.search.util.logging.impl.LoggerFactory;
/**
* Batch work until {@link #performWorks} is called.
* The work is then executed synchronously or asynchronously.
*
* @author Emmanuel Bernard
* @author Sanne Grinovero
*/
public class BatchedQueueingProcessor implements QueueingProcessor {
private static final Log log = LoggerFactory.make();
private final int batchSize;
private final Map<Class<?>, EntityIndexBinder> entityIndexBinders;
public BatchedQueueingProcessor(Map<Class<?>, EntityIndexBinder> entityIndexBinders, Properties properties) {
this.entityIndexBinders = entityIndexBinders;
batchSize = ConfigurationParseHelper.getIntValue( properties, Environment.QUEUEINGPROCESSOR_BATCHSIZE, 0 );
}
public void add(Work work, WorkQueue workQueue) {
//don't check for builder it's done in prepareWork
//FIXME WorkType.COLLECTION does not play well with batchSize
workQueue.add( work );
if ( batchSize > 0 && workQueue.size() >= batchSize ) {
WorkQueue subQueue = workQueue.splitQueue();
prepareWorks( subQueue );
performWorks( subQueue );
}
}
public void prepareWorks(WorkQueue workQueue) {
workQueue.prepareWorkPlan();
}
public void performWorks(WorkQueue workQueue) {
List<LuceneWork> sealedQueue = workQueue.getSealedQueue();
if ( log.isTraceEnabled() ) {
StringBuilder sb = new StringBuilder( "Lucene WorkQueue to send to backends:[ \n\t" );
for ( LuceneWork lw : sealedQueue ) {
sb.append( lw.toString() );
sb.append( "\n\t" );
}
if ( sealedQueue.size() > 0 ) {
sb.deleteCharAt( sb.length() - 1 );
}
sb.append( "]" );
log.trace( sb.toString() );
}
WorkQueuePerIndexSplitter context = new WorkQueuePerIndexSplitter();
for ( LuceneWork work : sealedQueue ) {
final Class<?> entityType = work.getEntityClass();
EntityIndexBinder entityIndexBinding = entityIndexBinders.get( entityType );
IndexShardingStrategy shardingStrategy = entityIndexBinding.getSelectionStrategy();
work.getWorkDelegate( TransactionalSelectionVisitor.INSTANCE )
.performOperation( work, shardingStrategy, context );
}
context.commitOperations( null );
}
public void cancelWorks(WorkQueue workQueue) {
workQueue.clear();
}
}