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NodeCountsStage.java
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NodeCountsStage.java
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/*
* Copyright (c) 2002-2017 "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 org.neo4j.kernel.impl.api.CountsAccessor;
import org.neo4j.kernel.impl.store.NodeStore;
import org.neo4j.unsafe.impl.batchimport.cache.NodeLabelsCache;
import org.neo4j.unsafe.impl.batchimport.staging.BatchFeedStep;
import org.neo4j.unsafe.impl.batchimport.staging.ReadRecordsStep;
import org.neo4j.unsafe.impl.batchimport.staging.Stage;
import org.neo4j.unsafe.impl.batchimport.stats.StatsProvider;
import static org.neo4j.unsafe.impl.batchimport.RecordIdIterator.allIn;
/**
* Reads all records from {@link NodeStore} and process the counts in them, populating {@link NodeLabelsCache}
* for later use of {@link RelationshipCountsStage}.
*/
public class NodeCountsStage extends Stage
{
public NodeCountsStage( Configuration config, NodeLabelsCache cache, NodeStore nodeStore,
int highLabelId, CountsAccessor.Updater countsUpdater, StatsProvider... additionalStatsProviders )
{
super( "Node counts", config );
add( new BatchFeedStep( control(), config, allIn( nodeStore, config ), nodeStore.getRecordSize() ) );
add( new ReadRecordsStep<>( control(), config, nodeStore ) );
add( new RecordProcessorStep<>( control(), "COUNT", config, new NodeCountsProcessor(
nodeStore, cache, highLabelId, countsUpdater ), true, additionalStatsProviders ) );
}
}