/
IndexBatchTransactionApplierTest.java
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/
IndexBatchTransactionApplierTest.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.kernel.impl.transaction.command;
import org.junit.Test;
import java.io.IOException;
import java.util.function.Supplier;
import org.neo4j.concurrent.WorkSync;
import org.neo4j.kernel.api.exceptions.index.IndexCapacityExceededException;
import org.neo4j.kernel.api.labelscan.NodeLabelUpdate;
import org.neo4j.kernel.impl.api.TransactionApplier;
import org.neo4j.kernel.impl.api.TransactionToApply;
import org.neo4j.kernel.impl.api.index.IndexingService;
import org.neo4j.kernel.impl.api.index.ValidatedIndexUpdates;
import org.neo4j.kernel.impl.store.NodeLabelsField;
import org.neo4j.kernel.impl.store.record.NodeRecord;
import org.neo4j.kernel.impl.transaction.command.Command.NodeCommand;
import org.neo4j.unsafe.batchinsert.LabelScanWriter;
import static org.junit.Assert.assertEquals;
import static org.mockito.Mockito.mock;
import static org.mockito.Mockito.when;
import static org.neo4j.kernel.impl.store.record.Record.NO_NEXT_PROPERTY;
import static org.neo4j.kernel.impl.store.record.Record.NO_NEXT_RELATIONSHIP;
public class IndexBatchTransactionApplierTest
{
@Test
public void shouldProvideLabelScanStoreUpdatesSortedByNodeId() throws Exception
{
// GIVEN
IndexingService indexing = mock( IndexingService.class );
LabelScanWriter writer = new OrderVerifyingLabelScanWriter( 10, 15, 20 );
WorkSync<Supplier<LabelScanWriter>,LabelUpdateWork> labelScanSync =
new WorkSync<>( singletonProvider( writer ) );
TransactionToApply tx = mock( TransactionToApply.class );
ValidatedIndexUpdates indexUpdates = mock( ValidatedIndexUpdates.class );
when( tx.validatedIndexUpdates() ).thenReturn( indexUpdates );
try ( IndexBatchTransactionApplier applier = new IndexBatchTransactionApplier( indexing, labelScanSync ) )
{
try ( TransactionApplier txApplier = applier.startTx( tx ))
{
// WHEN
txApplier.visitNodeCommand( node( 15 ) );
txApplier.visitNodeCommand( node( 20 ) );
txApplier.visitNodeCommand( node( 10 ) );
//applier.apply();
}
}
// THEN all assertions happen inside the LabelScanWriter#write and #close
}
private Supplier<LabelScanWriter> singletonProvider( final LabelScanWriter writer )
{
return () -> writer;
}
private NodeCommand node( long nodeId )
{
NodeCommand command = new NodeCommand();
NodeRecord after = new NodeRecord( nodeId,
true, false, NO_NEXT_RELATIONSHIP.intValue(),NO_NEXT_PROPERTY.intValue(), 0 );
NodeLabelsField.parseLabelsField( after ).add( 1, null, null );
command.init( new NodeRecord( nodeId ), after );
return command;
}
private static class OrderVerifyingLabelScanWriter implements LabelScanWriter
{
private final long[] expectedNodeIds;
private int cursor;
OrderVerifyingLabelScanWriter( long... expectedNodeIds )
{
this.expectedNodeIds = expectedNodeIds;
}
@Override
public void write( NodeLabelUpdate update ) throws IOException, IndexCapacityExceededException
{
assertEquals( expectedNodeIds[cursor], update.getNodeId() );
cursor++;
}
@Override
public void close() throws IOException
{
assertEquals( cursor, expectedNodeIds.length );
}
}
}