/*
* Copyright (C) 2009 eXo Platform SAS.
*
* This is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation; either version 2.1 of
* the License, or (at your option) any later version.
*
* This software 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 software; if not, write to the Free
* Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
* 02110-1301 USA, or see the FSF site: http://www.fsf.org.
*/
package org.xcmis.search.lucene.index;
import java.io.IOException;
import java.util.ArrayList;
import java.util.Collection;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import org.apache.lucene.analysis.standard.StandardAnalyzer;
import org.apache.lucene.document.Document;
import org.apache.lucene.index.IndexWriter;
import org.apache.lucene.index.IndexWriter.MaxFieldLength;
import org.apache.lucene.store.Directory;
import org.apache.lucene.store.RAMDirectory;
import org.apache.lucene.util.Version;
import org.xcmis.spi.utils.Logger;
/**
* Created by The eXo Platform SAS.
*
* @author <a href="mailto:Sergey.Kabashnyuk@gmail.com">Sergey Kabashnyuk</a>
* @version $Id: InMemoryIndexDataKeeperFactory.java 2 2010-02-04 17:21:49Z andrew00x $
*/
public class InMemoryIndexDataKeeperFactory extends LuceneIndexDataKeeperFactory
{
/**
* Class logger.
*/
private static final Logger LOG = Logger.getLogger(InMemoryIndexDataKeeperFactory.class);
/**
* {@inheritDoc}
*
* @throws IndexException
*/
public LuceneIndexDataManager createNewIndexDataKeeper(final IndexTransaction<Document> changes)
throws IndexException
{
if (!(changes instanceof LoggedIndexTransactionImpl))
{
throw new IndexException("Fail to create in memory storage for not loged transaction");
}
return new ReducibleInMemoryIndexDataKeeper((LoggedIndexTransactionImpl)changes);
}
/**
* {@inheritDoc}
*/
public LuceneIndexDataManager merge(final Collection<LuceneIndexDataManager> chains) throws IndexException
{
final List<TransactionLog> transactionsLogs = new ArrayList<TransactionLog>();
final List<Directory> mergeDirectorys = new ArrayList<Directory>();
final Map<String, Document> documentsBuffer = new HashMap<String, Document>();
final Map<String, Document> pendingBuffer = new HashMap<String, Document>();
for (final IndexDataKeeper<Document> indexDataKeeper : chains)
{
final ReducibleInMemoryIndexDataKeeper reducibleInMemoryIndexDataKeeper =
(ReducibleInMemoryIndexDataKeeper)indexDataKeeper;
if (reducibleInMemoryIndexDataKeeper.getDocumentCount() > 0)
{
final RAMDirectory directory = (RAMDirectory)reducibleInMemoryIndexDataKeeper.getDirectory();
if (directory.sizeInBytes() > 0)
{
mergeDirectorys.add(directory);
}
pendingBuffer.putAll(reducibleInMemoryIndexDataKeeper.getPendingDocumentsBuffer());
documentsBuffer.putAll(reducibleInMemoryIndexDataKeeper.getDocumentsBuffer());
transactionsLogs.add(reducibleInMemoryIndexDataKeeper.getTransactionLog());
}
}
LuceneIndexDataManager reducibleInMemoryIndexDataKeeper = null;
try
{
RAMDirectory newDirectory = null;
if (mergeDirectorys.size() > 0)
{
newDirectory = new RAMDirectory();
final IndexWriter newWriter =
new IndexWriter(newDirectory, new StandardAnalyzer(Version.LUCENE_35), MaxFieldLength.UNLIMITED);
final Directory[] dirsToMerge = new Directory[mergeDirectorys.size()];
newWriter.addIndexesNoOptimize(mergeDirectorys.toArray(dirsToMerge));
newWriter.optimize();
newWriter.close();
//
}
else
{
newDirectory = new RAMDirectory();
}
reducibleInMemoryIndexDataKeeper =
new ReducibleInMemoryIndexDataKeeper(newDirectory, documentsBuffer, pendingBuffer,
new CompositeTransactionLog(transactionsLogs));
}
catch (final IOException e)
{
throw new IndexException(e.getLocalizedMessage(), e);
}
catch (final TransactionLogException e)
{
throw new IndexException(e.getLocalizedMessage(), e);
}
return reducibleInMemoryIndexDataKeeper;
}
}