/
RelationshipStage.java
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/
RelationshipStage.java
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/*
* Copyright (c) 2002-2015 "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.store.PropertyStore;
import org.neo4j.kernel.impl.store.RelationshipStore;
import org.neo4j.unsafe.impl.batchimport.cache.NodeRelationshipCache;
import org.neo4j.unsafe.impl.batchimport.cache.idmapping.IdMapper;
import org.neo4j.unsafe.impl.batchimport.input.InputRelationship;
import org.neo4j.unsafe.impl.batchimport.staging.Stage;
import org.neo4j.unsafe.impl.batchimport.store.BatchingNeoStore;
import org.neo4j.unsafe.impl.batchimport.store.BatchingPageCache.WriterFactory;
import org.neo4j.unsafe.impl.batchimport.store.io.IoMonitor;
import static org.neo4j.unsafe.impl.batchimport.staging.Step.ORDER_PROCESS;
import static org.neo4j.unsafe.impl.batchimport.staging.Step.ORDER_SEND_DOWNSTREAM;
/**
* Imports the first part of relationships, namely the relationship record itself and its properties.
* Only the "next" pointers are set at this stage. The "prev" pointers are set in a later stage.
*/
public class RelationshipStage extends Stage
{
public RelationshipStage( Configuration config, IoMonitor writeMonitor, WriterFactory writerFactory,
InputIterable<InputRelationship> relationships, IdMapper idMapper,
BatchingNeoStore neoStore, NodeRelationshipCache cache, boolean specificIds,
EntityStoreUpdaterStep.Monitor storeUpdateMonitor )
{
super( "Relationships", config, ORDER_SEND_DOWNSTREAM | ORDER_PROCESS );
add( new InputIteratorBatcherStep<>( control(), config, relationships.iterator(), InputRelationship.class ) );
RelationshipStore relationshipStore = neoStore.getRelationshipStore();
PropertyStore propertyStore = neoStore.getPropertyStore();
add( new RelationshipPreparationStep( control(), config, idMapper ) );
add( new PropertyEncoderStep<>( control(), config, neoStore.getPropertyKeyRepository(), propertyStore ) );
add( new ParallelizeByNodeIdStep( control(), config ) );
add( new RelationshipEncoderStep( control(), config,
neoStore.getRelationshipTypeRepository(), cache, specificIds ) );
add( new EntityStoreUpdaterStep<>( control(), config,
relationshipStore, propertyStore, writeMonitor, writerFactory, storeUpdateMonitor ) );
}
}