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DeleteDuplicateNodesStep.java
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DeleteDuplicateNodesStep.java
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/*
* Copyright (c) 2002-2018 "Neo Technology,"
* Network Engine for Objects in Lund AB [http://neotechnology.com]
*
* This file is part of Neo4j.
*
* Neo4j is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
package org.neo4j.unsafe.impl.batchimport;
import java.io.IOException;
import org.neo4j.collection.primitive.PrimitiveLongIterator;
import org.neo4j.kernel.impl.store.NodeStore;
import org.neo4j.kernel.impl.store.RecordCursor;
import org.neo4j.kernel.impl.store.record.NodeRecord;
import org.neo4j.unsafe.impl.batchimport.staging.LonelyProcessingStep;
import org.neo4j.unsafe.impl.batchimport.staging.StageControl;
import static org.neo4j.kernel.impl.store.record.RecordLoad.NORMAL;
public class DeleteDuplicateNodesStep extends LonelyProcessingStep
{
private final NodeStore nodeStore;
private final PrimitiveLongIterator nodeIds;
private final DataImporter.Monitor storeMonitor;
private int nodesRemoved;
public DeleteDuplicateNodesStep( StageControl control, Configuration config, PrimitiveLongIterator nodeIds, NodeStore nodeStore,
DataImporter.Monitor storeMonitor )
{
super( control, "DEDUP", config );
this.nodeStore = nodeStore;
this.nodeIds = nodeIds;
this.storeMonitor = storeMonitor;
}
@Override
protected void process() throws IOException
{
NodeRecord record = nodeStore.newRecord();
RecordCursor<NodeRecord> cursor = nodeStore.newRecordCursor( record ).acquire( 0, NORMAL );
while ( nodeIds.hasNext() )
{
long duplicateNodeId = nodeIds.next();
cursor.next( duplicateNodeId );
record.setInUse( false );
nodeStore.updateRecord( record );
nodesRemoved++;
}
}
@Override
public void close() throws Exception
{
super.close();
storeMonitor.nodesRemoved( nodesRemoved );
}
}