/
BatchInsertDocTest.java
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/
BatchInsertDocTest.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 examples;
import java.io.File;
import java.io.FileReader;
import java.io.IOException;
import java.io.Writer;
import java.util.HashMap;
import java.util.Map;
import java.util.concurrent.TimeUnit;
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.graphdb.factory.GraphDatabaseFactory;
import org.neo4j.helpers.collection.MapUtil;
import org.neo4j.io.fs.DefaultFileSystemAbstraction;
import org.neo4j.io.fs.FileUtils;
import org.neo4j.test.DefaultFileSystemRule;
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;
public class BatchInsertDocTest
{
@Test
public void insert() throws Exception
{
// Make sure our scratch directory is clean
File tempStoreDir = new File( "target/batchinserter-example" ).getAbsoluteFile();
FileUtils.deleteRecursively( tempStoreDir );
// START SNIPPET: insert
BatchInserter inserter = null;
try
{
inserter = BatchInserters.inserter(
new File( "target/batchinserter-example" ).getAbsolutePath() );
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" );
inserter.createRelationship( mattiasNode, chrisNode, knows, null );
}
finally
{
if ( inserter != null )
{
inserter.shutdown();
}
}
// END SNIPPET: insert
// try it out from a normal db
GraphDatabaseService db =
new GraphDatabaseFactory().newEmbeddedDatabase(
new File("target/batchinserter-example").getAbsolutePath() );
try ( Transaction tx = db.beginTx() )
{
db.schema().awaitIndexesOnline( 10, TimeUnit.SECONDS );
}
try ( Transaction tx = db.beginTx() )
{
Label personLabelForTesting = DynamicLabel.label( "Person" );
Node mNode = db.findNode( personLabelForTesting, "name", "Mattias" );
Node cNode = mNode.getSingleRelationship( DynamicRelationshipType.withName( "KNOWS" ), Direction.OUTGOING ).getEndNode();
assertThat( (String) cNode.getProperty( "name" ), is( "Chris" ) );
assertThat( db.schema()
.getIndexes( personLabelForTesting )
.iterator()
.hasNext(), is( true ) );
}
finally
{
db.shutdown();
}
}
@Test
public void insertWithConfig() throws IOException
{
// START SNIPPET: configuredInsert
Map<String, String> config = new HashMap<>();
config.put( "dbms.pagecache.memory", "512m" );
BatchInserter inserter = BatchInserters.inserter(
new File( "target/batchinserter-example-config" ).getAbsolutePath(), 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/docs/batchinsert-config" ).getAbsoluteFile(), "utf-8", false ) )
{
fw.append( "dbms.pagecache.memory=8m" );
}
// START SNIPPET: configFileInsert
try ( FileReader input = new FileReader( new File( "target/docs/batchinsert-config" ).getAbsoluteFile() ) )
{
Map<String, String> config = MapUtil.load( input );
BatchInserter inserter = BatchInserters.inserter(
"target/docs/batchinserter-example-config", config );
// Insert data here ... and then shut down:
inserter.shutdown();
}
// END SNIPPET: configFileInsert
}
@Rule
public DefaultFileSystemRule fileSystemRule = new DefaultFileSystemRule();
private DefaultFileSystemAbstraction fileSystem;
@Before
public void before() throws Exception
{
fileSystem = fileSystemRule.get();
fileSystem.mkdirs( new File( "target" ) );
fileSystem.mkdirs( new File( "target/docs" ) );
}
}