//$Id: LuceneBackendQueueProcessor.java 15374 2008-10-22 21:36:38Z epbernard $
package org.hibernate.search.backend.impl.lucene;
import java.util.List;
import java.util.Map;
import org.hibernate.search.backend.LuceneWork;
import org.hibernate.search.backend.impl.lucene.works.LuceneWorkVisitor;
import org.hibernate.search.engine.DocumentBuilder;
import org.hibernate.search.engine.SearchFactoryImplementor;
import org.hibernate.search.store.DirectoryProvider;
import org.hibernate.search.store.IndexShardingStrategy;
/**
* Apply the operations to Lucene directories.
*
* @author Emmanuel Bernard
* @author Hardy Ferentschik
* @author John Griffin
* @author Sanne Grinovero
*/
class LuceneBackendQueueProcessor implements Runnable {
private final List<LuceneWork> queue;
private final SearchFactoryImplementor searchFactoryImplementor;
private final Map<DirectoryProvider,LuceneWorkVisitor> visitorsMap;
private static final DpSelectionVisitor providerSelectionVisitor = new DpSelectionVisitor();
LuceneBackendQueueProcessor(List<LuceneWork> queue,
SearchFactoryImplementor searchFactoryImplementor,
Map<DirectoryProvider,LuceneWorkVisitor> visitorsMap) {
this.queue = queue;
this.searchFactoryImplementor = searchFactoryImplementor;
this.visitorsMap = visitorsMap;
}
public void run() {
QueueProcessors processors = new QueueProcessors( visitorsMap );
// divide tasks in parts, adding to QueueProcessors by affected Directory.
for ( LuceneWork work : queue ) {
final Class<?> entityType = work.getEntityClass();
DocumentBuilder<?> documentBuilder = searchFactoryImplementor.getDocumentBuilder( entityType );
IndexShardingStrategy shardingStrategy = documentBuilder.getDirectoryProviderSelectionStrategy();
work.getWorkDelegate( providerSelectionVisitor ).addAsPayLoadsToQueue( work, shardingStrategy, processors );
}
// TODO next cycle could be performed in parallel
for ( PerDPQueueProcessor processor : processors.getQueueProcessors() ) {
// perform the work on indexes
processor.performWorks();
}
}
}