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IndexIT.java
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IndexIT.java
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/*
* Copyright (c) 2002-2018 "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.api.index;
import org.junit.After;
import org.junit.Before;
import org.junit.Test;
import java.util.List;
import java.util.Set;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
import java.util.concurrent.Future;
import java.util.concurrent.TimeUnit;
import org.neo4j.graphdb.Label;
import org.neo4j.graphdb.Transaction;
import org.neo4j.graphdb.schema.IndexDefinition;
import org.neo4j.helpers.collection.Iterables;
import org.neo4j.helpers.collection.Iterators;
import org.neo4j.internal.kernel.api.CapableIndexReference;
import org.neo4j.internal.kernel.api.SchemaRead;
import org.neo4j.internal.kernel.api.SchemaWrite;
import org.neo4j.internal.kernel.api.TokenWrite;
import org.neo4j.internal.kernel.api.Write;
import org.neo4j.internal.kernel.api.exceptions.KernelException;
import org.neo4j.internal.kernel.api.exceptions.schema.SchemaKernelException;
import org.neo4j.internal.kernel.api.schema.LabelSchemaDescriptor;
import org.neo4j.kernel.api.KernelTransaction;
import org.neo4j.kernel.api.index.PropertyAccessor;
import org.neo4j.kernel.api.schema.SchemaDescriptorFactory;
import org.neo4j.kernel.api.schema.constaints.IndexBackedConstraintDescriptor;
import org.neo4j.kernel.api.schema.index.SchemaIndexDescriptor;
import org.neo4j.kernel.impl.api.integrationtest.KernelIntegrationTest;
import org.neo4j.kernel.impl.api.state.ConstraintIndexCreator;
import org.neo4j.kernel.internal.GraphDatabaseAPI;
import static java.util.Collections.emptySet;
import static org.hamcrest.MatcherAssert.assertThat;
import static org.hamcrest.Matchers.containsInAnyOrder;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertTrue;
import static org.junit.Assert.fail;
import static org.mockito.Mockito.mock;
import static org.neo4j.helpers.collection.Iterators.asSet;
import static org.neo4j.internal.kernel.api.security.LoginContext.AUTH_DISABLED;
import static org.neo4j.kernel.impl.api.store.DefaultCapableIndexReference.fromDescriptor;
public class IndexIT extends KernelIntegrationTest
{
private static final String LABEL = "Label";
private static final String PROPERTY_KEY = "prop";
private static final String PROPERTY_KEY2 = "prop2";
private int labelId;
private int propertyKeyId;
private LabelSchemaDescriptor descriptor;
private LabelSchemaDescriptor descriptor2;
private ExecutorService executorService;
@Before
public void createLabelAndProperty() throws Exception
{
TokenWrite tokenWrites = tokenWriteInNewTransaction();
labelId = tokenWrites.labelGetOrCreateForName( LABEL );
propertyKeyId = tokenWrites.propertyKeyGetOrCreateForName( PROPERTY_KEY );
int propertyKeyId2 = tokenWrites.propertyKeyGetOrCreateForName( PROPERTY_KEY2 );
descriptor = SchemaDescriptorFactory.forLabel( labelId, propertyKeyId );
descriptor2 = SchemaDescriptorFactory.forLabel( labelId, propertyKeyId2 );
commit();
executorService = Executors.newCachedThreadPool();
}
@After
public void tearDown()
{
executorService.shutdown();
}
@Test
public void createIndexForAnotherLabelWhileHoldingSharedLockOnOtherLabel() throws KernelException
{
TokenWrite tokenWrite = tokenWriteInNewTransaction();
int label2 = tokenWrite.labelGetOrCreateForName( "Label2" );
Write write = dataWriteInNewTransaction();
long nodeId = write.nodeCreate();
write.nodeAddLabel( nodeId, label2 );
schemaWriteInNewTransaction().indexCreate( descriptor );
commit();
}
@Test( timeout = 10_000 )
public void createIndexesForDifferentLabelsConcurrently() throws Throwable
{
TokenWrite tokenWrite = tokenWriteInNewTransaction();
int label2 = tokenWrite.labelGetOrCreateForName( "Label2" );
LabelSchemaDescriptor anotherLabelDescriptor = SchemaDescriptorFactory.forLabel( label2, propertyKeyId );
schemaWriteInNewTransaction().indexCreate( anotherLabelDescriptor );
Future<?> indexFuture = executorService.submit( createIndex( db, Label.label( LABEL ), PROPERTY_KEY ) );
indexFuture.get();
commit();
}
@Test
public void addIndexRuleInATransaction() throws Exception
{
// GIVEN
SchemaWrite schemaWriteOperations = schemaWriteInNewTransaction();
// WHEN
CapableIndexReference expectedRule = schemaWriteOperations.indexCreate( descriptor );
commit();
// THEN
SchemaRead schemaRead = newTransaction().schemaRead();
assertEquals( asSet( expectedRule ), asSet( schemaRead.indexesGetForLabel( labelId ) ) );
assertEquals( expectedRule, schemaRead.index( descriptor.getLabelId(), descriptor.getPropertyIds() ) );
commit();
}
@Test
public void committedAndTransactionalIndexRulesShouldBeMerged() throws Exception
{
// GIVEN
SchemaWrite schemaWriteOperations = schemaWriteInNewTransaction();
CapableIndexReference existingRule = schemaWriteOperations.indexCreate( descriptor );
commit();
// WHEN
KernelTransaction transaction = newTransaction( AUTH_DISABLED );
CapableIndexReference addedRule = transaction.schemaWrite()
.indexCreate( SchemaDescriptorFactory.forLabel( labelId, 10 ) );
Set<CapableIndexReference> indexRulesInTx = asSet( transaction.schemaRead().indexesGetForLabel( labelId ) );
commit();
// THEN
assertEquals( asSet( existingRule, addedRule ), indexRulesInTx );
}
@Test
public void rollBackIndexRuleShouldNotBeCommitted() throws Exception
{
// GIVEN
SchemaWrite schemaWrite = schemaWriteInNewTransaction();
// WHEN
schemaWrite.indexCreate( descriptor );
// don't mark as success
rollback();
// THEN
KernelTransaction transaction = newTransaction();
assertEquals( emptySet(), asSet( transaction.schemaRead().indexesGetForLabel( labelId ) ) );
commit();
}
@Test
public void shouldBeAbleToRemoveAConstraintIndexWithoutOwner() throws Exception
{
// given
PropertyAccessor propertyAccessor = mock( PropertyAccessor.class );
ConstraintIndexCreator creator = new ConstraintIndexCreator( () -> kernel, indexingService, propertyAccessor );
SchemaIndexDescriptor constraintIndex = creator.createConstraintIndex( descriptor );
// then
KernelTransaction transaction = newTransaction();
assertEquals( emptySet(), asSet( transaction.schemaRead().constraintsGetForLabel( labelId ) ) );
commit();
// when
SchemaWrite schemaWrite = schemaWriteInNewTransaction();
schemaWrite.indexDrop( fromDescriptor( constraintIndex ) );
commit();
// then
transaction = newTransaction();
assertEquals( emptySet(), asSet( transaction.schemaRead().indexesGetForLabel( labelId ) ) );
commit();
}
@Test
public void shouldDisallowDroppingIndexThatDoesNotExist() throws Exception
{
// given
CapableIndexReference index;
{
SchemaWrite statement = schemaWriteInNewTransaction();
index = statement.indexCreate( descriptor );
commit();
}
{
SchemaWrite statement = schemaWriteInNewTransaction();
statement.indexDrop( index );
commit();
}
// when
try
{
SchemaWrite statement = schemaWriteInNewTransaction();
statement.indexDrop( index );
commit();
}
// then
catch ( SchemaKernelException e )
{
assertEquals( "Unable to drop index on :label[" + labelId + "](property[" + propertyKeyId + "]): " +
"No such INDEX ON :label[" + labelId + "](property[" + propertyKeyId + "]).", e.getMessage() );
}
commit();
}
@Test
public void shouldFailToCreateIndexWhereAConstraintAlreadyExists() throws Exception
{
// given
{
SchemaWrite statement = schemaWriteInNewTransaction();
statement.uniquePropertyConstraintCreate( descriptor );
commit();
}
// when
try
{
SchemaWrite statement = schemaWriteInNewTransaction();
statement.indexCreate( descriptor );
commit();
fail( "expected exception" );
}
// then
catch ( SchemaKernelException e )
{
assertEquals( "Label '" + LABEL + "' and property '" + PROPERTY_KEY + "' have a unique constraint defined" +
" on them, so an index is already created that matches this.", e.getMessage() );
}
commit();
}
@Test
public void shouldListConstraintIndexesInTheBeansAPI() throws Exception
{
// given
KernelTransaction transaction = newTransaction( AUTH_DISABLED );
transaction.schemaWrite().uniquePropertyConstraintCreate(
SchemaDescriptorFactory.forLabel(
transaction.tokenWrite().labelGetOrCreateForName( "Label1" ),
transaction.tokenWrite().propertyKeyGetOrCreateForName( "property1" )
) );
commit();
// when
try ( Transaction tx = db.beginTx() )
{
Set<IndexDefinition> indexes;
IndexDefinition index;
indexes = Iterables.asSet( db.schema().getIndexes() );
// then
assertEquals( 1, indexes.size() );
index = indexes.iterator().next();
assertEquals( "Label1", index.getLabel().name() );
assertEquals( asSet( "property1" ), Iterables.asSet( index.getPropertyKeys() ) );
assertTrue( "index should be a constraint index", index.isConstraintIndex() );
// when
try
{
index.drop();
fail( "expected exception" );
}
// then
catch ( IllegalStateException e )
{
assertEquals( "Constraint indexes cannot be dropped directly, " +
"instead drop the owning uniqueness constraint.", e.getMessage() );
}
}
}
@Test
public void shouldListAll() throws Exception
{
// given
SchemaWrite schemaWrite = schemaWriteInNewTransaction();
CapableIndexReference index1 = schemaWrite.indexCreate( descriptor );
CapableIndexReference index2 = fromDescriptor(
((IndexBackedConstraintDescriptor) schemaWrite.uniquePropertyConstraintCreate( descriptor2 )).ownedIndexDescriptor()) ;
commit();
// then/when
SchemaRead schemaRead = newTransaction().schemaRead();
List<CapableIndexReference> indexes = Iterators.asList( schemaRead.indexesGetAll() );
assertThat( indexes, containsInAnyOrder( index1, index2 ) );
commit();
}
private Runnable createIndex( GraphDatabaseAPI db, Label label, String propertyKey )
{
return () ->
{
try ( Transaction transaction = db.beginTx() )
{
db.schema().indexFor( label ).on( propertyKey ).create();
transaction.success();
}
try ( Transaction transaction = db.beginTx() )
{
db.schema().awaitIndexesOnline( 1, TimeUnit.MINUTES );
transaction.success();
}
};
}
}