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RelationshipCreatorTest.java
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RelationshipCreatorTest.java
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/*
* Copyright (c) 2002-2018 "Neo4j,"
* Neo4j Sweden AB [http://neo4j.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.state;
import org.junit.Before;
import org.junit.Rule;
import org.junit.Test;
import java.util.HashSet;
import java.util.Set;
import org.neo4j.graphdb.GraphDatabaseService;
import org.neo4j.graphdb.Node;
import org.neo4j.graphdb.Transaction;
import org.neo4j.graphdb.factory.GraphDatabaseSettings;
import org.neo4j.kernel.impl.MyRelTypes;
import org.neo4j.kernel.impl.locking.NoOpClient;
import org.neo4j.kernel.impl.locking.ResourceTypes;
import org.neo4j.kernel.impl.storageengine.impl.recordstorage.RecordStorageEngine;
import org.neo4j.kernel.impl.storageengine.impl.recordstorage.RelationshipCreator;
import org.neo4j.kernel.impl.storageengine.impl.recordstorage.RelationshipGroupGetter;
import org.neo4j.kernel.impl.store.NeoStores;
import org.neo4j.kernel.impl.store.id.IdGeneratorFactory;
import org.neo4j.kernel.impl.store.id.IdType;
import org.neo4j.kernel.impl.store.record.LabelTokenRecord;
import org.neo4j.kernel.impl.store.record.NodeRecord;
import org.neo4j.kernel.impl.store.record.PrimitiveRecord;
import org.neo4j.kernel.impl.store.record.PropertyKeyTokenRecord;
import org.neo4j.kernel.impl.store.record.PropertyRecord;
import org.neo4j.kernel.impl.store.record.RelationshipGroupRecord;
import org.neo4j.kernel.impl.store.record.RelationshipRecord;
import org.neo4j.kernel.impl.store.record.RelationshipTypeTokenRecord;
import org.neo4j.kernel.impl.store.record.SchemaRecord;
import org.neo4j.storageengine.api.lock.AcquireLockTimeoutException;
import org.neo4j.storageengine.api.lock.LockTracer;
import org.neo4j.storageengine.api.lock.ResourceType;
import org.neo4j.storageengine.api.schema.SchemaRule;
import org.neo4j.test.rule.DatabaseRule;
import org.neo4j.test.rule.ImpermanentDatabaseRule;
import org.neo4j.unsafe.batchinsert.internal.DirectRecordAccessSet;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertFalse;
import static org.junit.Assert.assertTrue;
public class RelationshipCreatorTest
{
private static final int DENSE_NODE_THRESHOLD = 5;
@Rule
public final DatabaseRule dbRule = new ImpermanentDatabaseRule()
.withSetting( GraphDatabaseSettings.dense_node_threshold, String.valueOf( DENSE_NODE_THRESHOLD ) );
private IdGeneratorFactory idGeneratorFactory;
@Before
public void before()
{
idGeneratorFactory = dbRule.getGraphDatabaseAPI().getDependencyResolver().resolveDependency(
IdGeneratorFactory.class );
}
@Test
public void shouldOnlyChangeLockedRecordsWhenUpgradingToDenseNode()
{
// GIVEN
long nodeId = createNodeWithRelationships( DENSE_NODE_THRESHOLD );
NeoStores neoStores = flipToNeoStores();
Tracker tracker = new Tracker( neoStores );
RelationshipGroupGetter groupGetter = new RelationshipGroupGetter( neoStores.getRelationshipGroupStore() );
RelationshipCreator relationshipCreator = new RelationshipCreator( groupGetter, 5 );
// WHEN
relationshipCreator.relationshipCreate( idGeneratorFactory.get( IdType.RELATIONSHIP ).nextId(), 0,
nodeId, nodeId, tracker, tracker );
// THEN
assertEquals( tracker.relationshipLocksAcquired.size(), tracker.changedRelationships.size() );
assertFalse( tracker.relationshipLocksAcquired.isEmpty() );
}
private NeoStores flipToNeoStores()
{
return dbRule.getGraphDatabaseAPI().getDependencyResolver().resolveDependency(
RecordStorageEngine.class ).testAccessNeoStores();
}
private long createNodeWithRelationships( int count )
{
GraphDatabaseService db = dbRule.getGraphDatabaseAPI();
try ( Transaction tx = db.beginTx() )
{
Node node = db.createNode();
for ( int i = 0; i < count; i++ )
{
node.createRelationshipTo( db.createNode(), MyRelTypes.TEST );
}
tx.success();
return node.getId();
}
}
static class Tracker extends NoOpClient implements RecordAccessSet
{
private final RecordAccessSet delegate;
private final TrackingRecordAccess<RelationshipRecord, Void> relRecords;
private final Set<Long> relationshipLocksAcquired = new HashSet<>();
private final Set<Long> changedRelationships = new HashSet<>();
Tracker( NeoStores neoStores )
{
this.delegate = new DirectRecordAccessSet( neoStores );
this.relRecords = new TrackingRecordAccess<>( delegate.getRelRecords(), this );
}
@Override
public void acquireExclusive( LockTracer tracer, ResourceType resourceType, long... resourceIds )
throws AcquireLockTimeoutException
{
assertEquals( ResourceTypes.RELATIONSHIP, resourceType );
for ( long resourceId : resourceIds )
{
relationshipLocksAcquired.add( resourceId );
}
}
protected void changingRelationship( long relId )
{ // Called by tracking record proxies
assertTrue( "Tried to change relationship " + relId + " without this transaction having it locked",
relationshipLocksAcquired.contains( relId ) );
changedRelationships.add( relId );
}
@Override
public RecordAccess<NodeRecord, Void> getNodeRecords()
{
return delegate.getNodeRecords();
}
@Override
public RecordAccess<PropertyRecord, PrimitiveRecord> getPropertyRecords()
{
return delegate.getPropertyRecords();
}
@Override
public RecordAccess<RelationshipRecord, Void> getRelRecords()
{
return relRecords;
}
@Override
public RecordAccess<RelationshipGroupRecord, Integer> getRelGroupRecords()
{
return delegate.getRelGroupRecords();
}
@Override
public RecordAccess<SchemaRecord, SchemaRule> getSchemaRuleChanges()
{
return delegate.getSchemaRuleChanges();
}
@Override
public RecordAccess<PropertyKeyTokenRecord, Void> getPropertyKeyTokenChanges()
{
return delegate.getPropertyKeyTokenChanges();
}
@Override
public RecordAccess<LabelTokenRecord, Void> getLabelTokenChanges()
{
return delegate.getLabelTokenChanges();
}
@Override
public RecordAccess<RelationshipTypeTokenRecord, Void> getRelationshipTypeTokenChanges()
{
return delegate.getRelationshipTypeTokenChanges();
}
@Override
public void close()
{
delegate.close();
}
@Override
public boolean hasChanges()
{
return delegate.hasChanges();
}
@Override
public int changeSize()
{
return delegate.changeSize();
}
}
}