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IndexPopulationIT.java
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IndexPopulationIT.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 schema;
import org.apache.commons.lang3.RandomStringUtils;
import org.junit.AfterClass;
import org.junit.BeforeClass;
import org.junit.ClassRule;
import org.junit.Test;
import java.io.File;
import java.util.Map;
import java.util.concurrent.Callable;
import java.util.concurrent.ExecutionException;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
import java.util.concurrent.Future;
import java.util.concurrent.TimeUnit;
import org.neo4j.graphdb.GraphDatabaseService;
import org.neo4j.graphdb.Label;
import org.neo4j.graphdb.Node;
import org.neo4j.graphdb.ResourceIterator;
import org.neo4j.graphdb.Result;
import org.neo4j.graphdb.Transaction;
import org.neo4j.graphdb.factory.GraphDatabaseFactory;
import org.neo4j.helpers.collection.Iterables;
import org.neo4j.helpers.collection.Iterators;
import org.neo4j.kernel.impl.api.index.IndexPopulationJob;
import org.neo4j.logging.AssertableLogProvider;
import org.neo4j.test.TestGraphDatabaseFactory;
import org.neo4j.test.rule.TestDirectory;
import static org.junit.Assert.assertEquals;
public class IndexPopulationIT
{
@ClassRule
public static final TestDirectory directory = TestDirectory.testDirectory();
private static final int TEST_TIMEOUT = 30_000;
private static GraphDatabaseService database;
private static ExecutorService executorService;
@BeforeClass
public static void setUp()
{
database = new GraphDatabaseFactory().newEmbeddedDatabase( directory.graphDbDir() );
executorService = Executors.newCachedThreadPool();
}
@AfterClass
public static void tearDown()
{
executorService.shutdown();
database.shutdown();
}
@Test( timeout = TEST_TIMEOUT )
public void indexCreationDoNotBlockQueryExecutions() throws Exception
{
Label nodeLabel = Label.label( "nodeLabel" );
try ( Transaction transaction = database.beginTx() )
{
database.createNode(nodeLabel);
transaction.success();
}
try ( Transaction transaction = database.beginTx() )
{
database.schema().indexFor( Label.label( "testLabel" ) ).on( "testProperty" ).create();
Future<Number> countFuture = executorService.submit( countNodes() );
assertEquals( 1, countFuture.get().intValue() );
transaction.success();
}
}
@Test( timeout = TEST_TIMEOUT )
public void createIndexesFromDifferentTransactionsWithoutBlocking() throws ExecutionException, InterruptedException
{
long numberOfIndexesBeforeTest = countIndexes();
Label nodeLabel = Label.label( "nodeLabel2" );
String testProperty = "testProperty";
try ( Transaction transaction = database.beginTx() )
{
database.schema().indexFor( Label.label( "testLabel2" ) ).on( testProperty ).create();
Future<?> creationFuture = executorService.submit( createIndexForLabelAndProperty( nodeLabel, testProperty ) );
creationFuture.get();
transaction.success();
}
waitForOnlineIndexes();
assertEquals( numberOfIndexesBeforeTest + 2, countIndexes() );
}
@Test( timeout = TEST_TIMEOUT )
public void indexCreationDoNotBlockWritesOnOtherLabel() throws ExecutionException, InterruptedException
{
Label markerLabel = Label.label( "testLabel3" );
Label nodesLabel = Label.label( "testLabel4" );
try ( Transaction transaction = database.beginTx() )
{
database.schema().indexFor( markerLabel ).on( "testProperty" ).create();
Future<?> creation = executorService.submit( createNodeWithLabel( nodesLabel ) );
creation.get();
transaction.success();
}
try ( Transaction transaction = database.beginTx() )
{
try ( ResourceIterator<Node> nodes = database.findNodes( nodesLabel ) )
{
assertEquals( 1, Iterators.count( nodes ) );
}
}
}
@Test
public void shutdownDatabaseDuringIndexPopulations()
{
AssertableLogProvider assertableLogProvider = new AssertableLogProvider( true );
File storeDir = directory.directory( "shutdownDbTest" );
Label testLabel = Label.label( "testLabel" );
String propertyName = "testProperty";
GraphDatabaseService shutDownDb = new TestGraphDatabaseFactory().setInternalLogProvider( assertableLogProvider )
.newEmbeddedDatabase( storeDir );
prePopulateDatabase( shutDownDb, testLabel, propertyName );
try ( Transaction transaction = shutDownDb.beginTx() )
{
shutDownDb.schema().indexFor( testLabel ).on( propertyName ).create();
transaction.success();
}
shutDownDb.shutdown();
assertableLogProvider.assertNone( AssertableLogProvider.inLog( IndexPopulationJob.class ).anyError() );
}
private void prePopulateDatabase( GraphDatabaseService database, Label testLabel, String propertyName )
{
for ( int j = 0; j < 100; j++ )
{
for ( int i = 0; i < 100; i++ )
{
try ( Transaction transaction = database.beginTx() )
{
Node node = database.createNode( testLabel );
node.setProperty( propertyName, RandomStringUtils.randomAlphabetic( 10 ) );
transaction.success();
}
}
}
}
private Runnable createNodeWithLabel( Label label )
{
return () ->
{
try ( Transaction transaction = database.beginTx() )
{
database.createNode( label );
transaction.success();
}
};
}
private long countIndexes()
{
try ( Transaction transaction = database.beginTx() )
{
return Iterables.count( database.schema().getIndexes() );
}
}
private Runnable createIndexForLabelAndProperty( Label label, String propertyKey )
{
return () ->
{
try ( Transaction transaction = database.beginTx() )
{
database.schema().indexFor( label ).on( propertyKey ).create();
transaction.success();
}
waitForOnlineIndexes();
};
}
private void waitForOnlineIndexes()
{
try ( Transaction transaction = database.beginTx() )
{
database.schema().awaitIndexesOnline( 1, TimeUnit.MINUTES );
transaction.success();
}
}
private Callable<Number> countNodes()
{
return () ->
{
try ( Transaction transaction = database.beginTx() )
{
Result result = database.execute( "MATCH (n) RETURN count(n) as count" );
Map<String,Object> resultMap = result.next();
return (Number) resultMap.get( "count" );
}
};
}
}