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NonUniqueIndexTest.java
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NonUniqueIndexTest.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 org.neo4j.index.impl.lucene.legacy;
import org.junit.Rule;
import org.junit.Test;
import java.io.File;
import java.util.List;
import java.util.Map;
import java.util.concurrent.locks.LockSupport;
import org.neo4j.collection.primitive.PrimitiveLongCollections;
import org.neo4j.graphdb.GraphDatabaseService;
import org.neo4j.graphdb.Node;
import org.neo4j.graphdb.Transaction;
import org.neo4j.graphdb.factory.GraphDatabaseFactoryState;
import org.neo4j.io.fs.DefaultFileSystemAbstraction;
import org.neo4j.kernel.api.impl.schema.LuceneSchemaIndexProviderFactory;
import org.neo4j.kernel.api.index.IndexAccessor;
import org.neo4j.kernel.api.index.SchemaIndexProvider;
import org.neo4j.kernel.api.schema.IndexQuery;
import org.neo4j.kernel.api.schema.index.IndexDescriptorFactory;
import org.neo4j.kernel.configuration.Config;
import org.neo4j.kernel.impl.api.index.sampling.IndexSamplingConfig;
import org.neo4j.kernel.impl.factory.CommunityEditionModule;
import org.neo4j.kernel.impl.factory.DatabaseInfo;
import org.neo4j.kernel.impl.factory.GraphDatabaseFacade;
import org.neo4j.kernel.impl.factory.GraphDatabaseFacadeFactory;
import org.neo4j.kernel.impl.factory.OperationalMode;
import org.neo4j.kernel.impl.factory.PlatformModule;
import org.neo4j.kernel.impl.logging.LogService;
import org.neo4j.kernel.impl.logging.NullLogService;
import org.neo4j.kernel.impl.util.Neo4jJobScheduler;
import org.neo4j.logging.LogProvider;
import org.neo4j.logging.NullLogProvider;
import org.neo4j.storageengine.api.schema.IndexReader;
import org.neo4j.test.rule.TestDirectory;
import org.neo4j.test.rule.fs.DefaultFileSystemRule;
import static java.util.Collections.singletonList;
import static org.hamcrest.CoreMatchers.equalTo;
import static org.junit.Assert.assertThat;
import static org.neo4j.graphdb.Label.label;
public class NonUniqueIndexTest
{
@Rule
public final TestDirectory directory = TestDirectory.testDirectory( getClass() );
@Rule
public final DefaultFileSystemRule fileSystemRule = new DefaultFileSystemRule();
@Test
public void concurrentIndexPopulationAndInsertsShouldNotProduceDuplicates() throws Exception
{
// Given
GraphDatabaseService db = newEmbeddedGraphDatabaseWithSlowJobScheduler();
// When
try ( Transaction tx = db.beginTx() )
{
db.schema().indexFor( label( "SomeLabel" ) ).on( "key" ).create();
tx.success();
}
Node node;
try ( Transaction tx = db.beginTx() )
{
node = db.createNode( label( "SomeLabel" ) );
node.setProperty( "key", "value" );
tx.success();
}
db.shutdown();
// Then
assertThat( nodeIdsInIndex( 1, "value" ), equalTo( singletonList( node.getId() ) ) );
}
private GraphDatabaseService newEmbeddedGraphDatabaseWithSlowJobScheduler()
{
GraphDatabaseFactoryState graphDatabaseFactoryState = new GraphDatabaseFactoryState();
graphDatabaseFactoryState.setUserLogProvider( NullLogService.getInstance().getUserLogProvider() );
return new GraphDatabaseFacadeFactory( DatabaseInfo.COMMUNITY, CommunityEditionModule::new )
{
@Override
protected PlatformModule createPlatform( File storeDir, Config config, Dependencies dependencies,
GraphDatabaseFacade graphDatabaseFacade )
{
return new PlatformModule( storeDir, config, databaseInfo, dependencies, graphDatabaseFacade )
{
@Override
protected Neo4jJobScheduler createJobScheduler()
{
return newSlowJobScheduler();
}
@Override
protected LogService createLogService( LogProvider userLogProvider )
{
return NullLogService.getInstance();
}
};
}
}.newFacade( directory.graphDbDir(), Config.defaults(),
graphDatabaseFactoryState.databaseDependencies() );
}
private static Neo4jJobScheduler newSlowJobScheduler()
{
return new Neo4jJobScheduler()
{
@Override
public JobHandle schedule( Group group, Runnable job )
{
return super.schedule( group, slowRunnable( job ) );
}
@Override
public JobHandle schedule( Group group, Runnable job, Map<String,String> metadata )
{
return super.schedule( group, slowRunnable(job), metadata );
}
};
}
private static Runnable slowRunnable( final Runnable target )
{
return () ->
{
LockSupport.parkNanos( 100_000_000 );
target.run();
};
}
private List<Long> nodeIdsInIndex( int indexId, String value ) throws Exception
{
Config config = Config.defaults();
DefaultFileSystemAbstraction fs = fileSystemRule.get();
File storeDir = directory.graphDbDir();
NullLogProvider logProvider = NullLogProvider.getInstance();
OperationalMode operationalMode = OperationalMode.single;
SchemaIndexProvider indexProvider = LuceneSchemaIndexProviderFactory.create( fs, storeDir, logProvider, config, operationalMode );
IndexSamplingConfig samplingConfig = new IndexSamplingConfig( config );
try ( IndexAccessor accessor = indexProvider.getOnlineAccessor( indexId,
IndexDescriptorFactory.forLabel( 0, 0 ), samplingConfig );
IndexReader reader = accessor.newReader() )
{
return PrimitiveLongCollections.asList( reader.query( IndexQuery.exact( 1, value ) ) );
}
}
}