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BatchInsertDocTest.java
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BatchInsertDocTest.java
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/**
* Copyright (c) 2002-2014 "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 examples;
import java.io.File;
import java.io.IOException;
import java.io.InputStream;
import java.io.Writer;
import java.util.HashMap;
import java.util.Map;
import org.junit.Before;
import org.junit.Rule;
import org.junit.Test;
import org.neo4j.graphdb.Direction;
import org.neo4j.graphdb.DynamicLabel;
import org.neo4j.graphdb.DynamicRelationshipType;
import org.neo4j.graphdb.GraphDatabaseService;
import org.neo4j.graphdb.Label;
import org.neo4j.graphdb.Node;
import org.neo4j.graphdb.RelationshipType;
import org.neo4j.graphdb.Transaction;
import org.neo4j.helpers.collection.MapUtil;
import org.neo4j.test.EphemeralFileSystemRule;
import org.neo4j.test.TestGraphDatabaseFactory;
import org.neo4j.test.impl.EphemeralFileSystemAbstraction;
import org.neo4j.unsafe.batchinsert.BatchInserter;
import org.neo4j.unsafe.batchinsert.BatchInserters;
import static org.hamcrest.core.Is.is;
import static org.junit.Assert.assertThat;
import static org.neo4j.graphdb.Neo4jMatchers.hasProperty;
import static org.neo4j.graphdb.Neo4jMatchers.inTx;
public class BatchInsertDocTest
{
@Test
public void insert()
{
// START SNIPPET: insert
BatchInserter inserter = BatchInserters.inserter( "target/batchinserter-example", fileSystem );
Label personLabel = DynamicLabel.label( "Person" );
inserter.createDeferredSchemaIndex( personLabel ).on( "name" ).create();
Map<String, Object> properties = new HashMap<>();
properties.put( "name", "Mattias" );
long mattiasNode = inserter.createNode( properties, personLabel );
properties.put( "name", "Chris" );
long chrisNode = inserter.createNode( properties, personLabel );
RelationshipType knows = DynamicRelationshipType.withName( "KNOWS" );
// To set properties on the relationship, use a properties map
// instead of null as the last parameter.
inserter.createRelationship( mattiasNode, chrisNode, knows, null );
inserter.shutdown();
// END SNIPPET: insert
// try it out from a normal db
GraphDatabaseService db = new TestGraphDatabaseFactory().setFileSystem( fileSystem ).newImpermanentDatabase(
"target/batchinserter-example" );
try ( Transaction tx = db.beginTx() )
{
Node mNode = db.getNodeById( mattiasNode );
Node cNode = mNode.getSingleRelationship( knows, Direction.OUTGOING ).getEndNode();
assertThat( (String) cNode.getProperty( "name" ), is( "Chris" ) );
assertThat( db.schema()
.getIndexes( personLabel )
.iterator()
.hasNext(), is( true ) );
}
finally
{
db.shutdown();
}
}
@Test
public void insertWithConfig()
{
// START SNIPPET: configuredInsert
Map<String, String> config = new HashMap<>();
config.put( "neostore.nodestore.db.mapped_memory", "90M" );
BatchInserter inserter = BatchInserters.inserter(
"target/batchinserter-example-config", fileSystem, config );
// Insert data here ... and then shut down:
inserter.shutdown();
// END SNIPPET: configuredInsert
}
@Test
public void insertWithConfigFile() throws IOException
{
try ( Writer fw = fileSystem.openAsWriter( new File( "target/batchinsert-config" ), "utf-8", false ) )
{
fw.append( "neostore.nodestore.db.mapped_memory=90M\n"
+ "neostore.relationshipstore.db.mapped_memory=3G\n"
+ "neostore.propertystore.db.mapped_memory=50M\n"
+ "neostore.propertystore.db.strings.mapped_memory=100M\n"
+ "neostore.propertystore.db.arrays.mapped_memory=0M" );
}
// START SNIPPET: configFileInsert
try ( InputStream input = fileSystem.openAsInputStream( new File( "target/batchinsert-config" ) ) )
{
Map<String, String> config = MapUtil.load( input );
BatchInserter inserter = BatchInserters.inserter(
"target/batchinserter-example-config", fileSystem, config );
// Insert data here ... and then shut down:
inserter.shutdown();
}
// END SNIPPET: configFileInsert
}
@Test
public void batchDb()
{
// START SNIPPET: batchDb
GraphDatabaseService batchDb =
BatchInserters.batchDatabase( "target/batchdb-example", fileSystem );
Label personLabel = DynamicLabel.label( "Person" );
Node mattiasNode = batchDb.createNode( personLabel );
mattiasNode.setProperty( "name", "Mattias" );
Node chrisNode = batchDb.createNode();
chrisNode.setProperty( "name", "Chris" );
chrisNode.addLabel( personLabel );
RelationshipType knows = DynamicRelationshipType.withName( "KNOWS" );
mattiasNode.createRelationshipTo( chrisNode, knows );
// END SNIPPET: batchDb
long mattiasNodeId = mattiasNode.getId();
// START SNIPPET: batchDb
batchDb.shutdown();
// END SNIPPET: batchDb
// try it out from a normal db
GraphDatabaseService db = new TestGraphDatabaseFactory().setFileSystem( fileSystem ).newImpermanentDatabase(
"target/batchdb-example" );
try ( Transaction tx = db.beginTx() )
{
Node mNode = db.getNodeById( mattiasNodeId );
Node cNode = mNode.getSingleRelationship( knows, Direction.OUTGOING )
.getEndNode();
assertThat( cNode, inTx( db, hasProperty( "name" ).withValue( "Chris" ) ) );
}
finally
{
db.shutdown();
}
}
@Test
public void batchDbWithConfig()
{
// START SNIPPET: configuredBatchDb
Map<String, String> config = new HashMap<>();
config.put( "neostore.nodestore.db.mapped_memory", "90M" );
GraphDatabaseService batchDb =
BatchInserters.batchDatabase( "target/batchdb-example-config", fileSystem, config );
// Insert data here ... and then shut down:
batchDb.shutdown();
// END SNIPPET: configuredBatchDb
}
@Rule
public EphemeralFileSystemRule fileSystemRule = new EphemeralFileSystemRule();
private EphemeralFileSystemAbstraction fileSystem;
@Before
public void before() throws Exception
{
fileSystem = fileSystemRule.get();
fileSystem.mkdirs( new File( "target" ) );
}
}