RelationshipCountsStage.java

/*
 * 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.RelationshipStore;
import org.neo4j.unsafe.impl.batchimport.cache.NodeLabelsCache;
import org.neo4j.unsafe.impl.batchimport.cache.NumberArrayFactory;
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 static org.neo4j.unsafe.impl.batchimport.RecordIdIterator.allIn;

/**
 * Reads all records from {@link RelationshipStore} and process the counts in them. Uses a {@link NodeLabelsCache}
 * previously populated by f.ex {@link NodeCountsStage}.
 */
public class RelationshipCountsStage extends Stage
{
    public RelationshipCountsStage( Configuration config, NodeLabelsCache cache,
            RelationshipStore relationshipStore,
            int highLabelId, int highRelationshipTypeId, CountsAccessor.Updater countsUpdater,
            NumberArrayFactory cacheFactory )
    {
        super( "Relationship counts", config );
        add( new BatchFeedStep( control(), config, allIn( relationshipStore, config ),
                relationshipStore.getRecordSize() ) );
        add( new ReadRecordsStep<>( control(), config, relationshipStore ) );
        add( new ProcessRelationshipCountsDataStep( control(), cache, config,
                highLabelId, highRelationshipTypeId, countsUpdater, cacheFactory ) );
    }
}