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UniqueIndexRecoveryTest.java
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UniqueIndexRecoveryTest.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.index.recovery;
import org.junit.After;
import org.junit.Before;
import org.junit.Rule;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.junit.runners.Parameterized;
import java.io.File;
import java.io.IOException;
import java.util.ArrayList;
import java.util.Collection;
import java.util.List;
import java.util.Random;
import org.neo4j.graphdb.Label;
import org.neo4j.graphdb.Node;
import org.neo4j.graphdb.Transaction;
import org.neo4j.graphdb.schema.ConstraintDefinition;
import org.neo4j.io.fs.FileUtils;
import org.neo4j.io.pagecache.IOLimiter;
import org.neo4j.kernel.api.impl.schema.LuceneIndexProviderFactory;
import org.neo4j.kernel.api.impl.schema.NativeLuceneFusionIndexProviderFactory10;
import org.neo4j.kernel.api.impl.schema.NativeLuceneFusionIndexProviderFactory20;
import org.neo4j.kernel.extension.KernelExtensionFactory;
import org.neo4j.kernel.impl.api.index.inmemory.InMemoryIndexProviderFactory;
import org.neo4j.kernel.impl.transaction.log.checkpoint.CheckPointer;
import org.neo4j.kernel.impl.transaction.log.checkpoint.SimpleTriggerInfo;
import org.neo4j.kernel.impl.transaction.log.rotation.LogRotation;
import org.neo4j.kernel.internal.GraphDatabaseAPI;
import org.neo4j.storageengine.api.StorageEngine;
import org.neo4j.test.TestGraphDatabaseFactory;
import org.neo4j.test.rule.TestDirectory;
import static java.util.Arrays.asList;
import static org.hamcrest.MatcherAssert.assertThat;
import static org.hamcrest.core.IsEqual.equalTo;
import static org.junit.Assert.assertFalse;
import static org.neo4j.graphdb.Label.label;
@RunWith( Parameterized.class )
public class UniqueIndexRecoveryTest
{
@Rule
public final TestDirectory storeDir = TestDirectory.testDirectory();
private static final String PROPERTY_KEY = "key";
private static final String PROPERTY_VALUE = "value";
private static final Label LABEL = label( "label" );
private final TestGraphDatabaseFactory factory = new TestGraphDatabaseFactory();
private GraphDatabaseAPI db;
@Parameterized.Parameters( name = "{0}" )
public static Collection<Object[]> parameters()
{
return asList(
new Object[]{new LuceneIndexProviderFactory()},
new Object[]{new NativeLuceneFusionIndexProviderFactory10()},
new Object[]{new NativeLuceneFusionIndexProviderFactory20()},
new Object[]{new InMemoryIndexProviderFactory()} );
}
@Parameterized.Parameter( 0 )
public KernelExtensionFactory<?> kernelExtensionFactory;
@Before
public void before()
{
List<KernelExtensionFactory<?>> extensionFactories = new ArrayList<>();
extensionFactories.add( kernelExtensionFactory );
factory.setKernelExtensions( extensionFactories );
db = newDb();
}
private GraphDatabaseAPI newDb()
{
return (GraphDatabaseAPI) factory
.newEmbeddedDatabaseBuilder( storeDir.absolutePath() )
.newGraphDatabase();
}
@After
public void after()
{
db.shutdown();
}
@Test
public void shouldRecoverCreationOfUniquenessConstraintFollowedByDeletionOfThatSameConstraint() throws Exception
{
// given
createUniqueConstraint();
dropConstraints();
// when - perform recovery
restart( snapshot( storeDir.absolutePath() ) );
// then - just make sure the constraint is gone
try ( Transaction tx = db.beginTx() )
{
assertFalse( db.schema().getConstraints( LABEL ).iterator().hasNext() );
tx.success();
}
}
@Test
public void shouldRecoverWhenCommandsTemporarilyViolateConstraints() throws Exception
{
// GIVEN
Node unLabeledNode = createUnLabeledNodeWithProperty();
Node labeledNode = createLabeledNode();
createUniqueConstraint();
rotateLogAndCheckPoint(); // snapshot
setPropertyOnLabeledNode( labeledNode );
deletePropertyOnLabeledNode( labeledNode );
addLabelToUnLabeledNode( unLabeledNode );
flushAll(); // persist - recovery will do everything since last log rotate
// WHEN recovery is triggered
restart( snapshot( storeDir.absolutePath() ) );
// THEN
// it should just not blow up!
try ( Transaction tx = db.beginTx() )
{
assertThat(
db.findNode( LABEL, PROPERTY_KEY, PROPERTY_VALUE ),
equalTo( unLabeledNode ) );
tx.success();
}
}
private void restart( File newStore )
{
db.shutdown();
db = newDb();
}
private File snapshot( final File path ) throws IOException
{
File snapshotDir = new File( path, "snapshot-" + new Random().nextInt() );
FileUtils.copyRecursively( path, snapshotDir, pathName ->
{
String subPath = pathName.getAbsolutePath().substring( path.getPath().length() + 1 );
// since the db is running, exclude the lock files
return !"store_lock".equals( subPath ) && !subPath.endsWith( "write.lock" );
} );
return snapshotDir;
}
private void addLabelToUnLabeledNode( Node unLabeledNode )
{
try ( Transaction tx = db.beginTx() )
{
unLabeledNode.addLabel( LABEL );
tx.success();
}
}
private void setPropertyOnLabeledNode( Node labeledNode )
{
try ( Transaction tx = db.beginTx() )
{
labeledNode.setProperty( PROPERTY_KEY, PROPERTY_VALUE );
tx.success();
}
}
private void deletePropertyOnLabeledNode( Node labeledNode )
{
try ( Transaction tx = db.beginTx() )
{
labeledNode.removeProperty( PROPERTY_KEY );
tx.success();
}
}
private void createUniqueConstraint()
{
try ( Transaction tx = db.beginTx() )
{
db.schema().constraintFor( LABEL ).assertPropertyIsUnique( PROPERTY_KEY ).create();
tx.success();
}
}
private Node createLabeledNode()
{
try ( Transaction tx = db.beginTx() )
{
Node node = db.createNode( LABEL );
tx.success();
return node;
}
}
private Node createUnLabeledNodeWithProperty()
{
try ( Transaction tx = db.beginTx() )
{
Node node = db.createNode();
node.setProperty( PROPERTY_KEY, PROPERTY_VALUE );
tx.success();
return node;
}
}
private void dropConstraints()
{
try ( Transaction tx = db.beginTx() )
{
for ( ConstraintDefinition constraint : db.schema().getConstraints( LABEL ) )
{
constraint.drop();
}
tx.success();
}
}
private void rotateLogAndCheckPoint() throws IOException
{
db.getDependencyResolver().resolveDependency( LogRotation.class ).rotateLogFile();
db.getDependencyResolver().resolveDependency( CheckPointer.class ).forceCheckPoint(
new SimpleTriggerInfo( "test" )
);
}
private void flushAll()
{
db.getDependencyResolver().resolveDependency( StorageEngine.class ).flushAndForce( IOLimiter.UNLIMITED );
}
}