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DropBrokenUniquenessConstraintIT.java
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DropBrokenUniquenessConstraintIT.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.graphdb.schema;
import org.junit.Rule;
import org.junit.Test;
import java.util.List;
import org.neo4j.graphdb.Label;
import org.neo4j.graphdb.Transaction;
import org.neo4j.kernel.impl.storageengine.impl.recordstorage.RecordStorageEngine;
import org.neo4j.kernel.impl.store.SchemaStore;
import org.neo4j.kernel.impl.store.record.ConstraintRule;
import org.neo4j.kernel.impl.store.record.DynamicRecord;
import org.neo4j.storageengine.api.schema.SchemaRule;
import org.neo4j.storageengine.api.schema.StoreIndexDescriptor;
import org.neo4j.test.rule.DatabaseRule;
import org.neo4j.test.rule.EmbeddedDatabaseRule;
import static org.junit.Assert.assertFalse;
import static org.neo4j.helpers.collection.Iterators.filter;
import static org.neo4j.helpers.collection.Iterators.single;
public class DropBrokenUniquenessConstraintIT
{
private final Label label = Label.label( "Label" );
private final String key = "key";
@Rule
public final DatabaseRule db = new EmbeddedDatabaseRule();
@Test
public void shouldDropUniquenessConstraintWithBackingIndexNotInUse()
{
// given
try ( Transaction tx = db.beginTx() )
{
db.schema().constraintFor( label ).assertPropertyIsUnique( key ).create();
tx.success();
}
// when intentionally breaking the schema by setting the backing index rule to unused
RecordStorageEngine storageEngine = db.getDependencyResolver().resolveDependency( RecordStorageEngine.class );
SchemaStore schemaStore = storageEngine.testAccessNeoStores().getSchemaStore();
SchemaRule indexRule = single( filter( rule -> rule instanceof StoreIndexDescriptor, schemaStore.loadAllSchemaRules() ) );
setSchemaRecordNotInUse( schemaStore, indexRule.getId() );
// At this point the SchemaCache doesn't know about this change so we have to reload it
storageEngine.loadSchemaCache();
try ( Transaction tx = db.beginTx() )
{
single( db.schema().getConstraints( label ).iterator() ).drop();
tx.success();
}
// then
try ( Transaction ignore = db.beginTx() )
{
assertFalse( db.schema().getConstraints().iterator().hasNext() );
assertFalse( db.schema().getIndexes().iterator().hasNext() );
}
}
@Test
public void shouldDropUniquenessConstraintWithBackingIndexHavingNoOwner() throws Exception
{
// given
try ( Transaction tx = db.beginTx() )
{
db.schema().constraintFor( label ).assertPropertyIsUnique( key ).create();
tx.success();
}
// when intentionally breaking the schema by setting the backing index rule to unused
RecordStorageEngine storageEngine = db.getDependencyResolver().resolveDependency( RecordStorageEngine.class );
SchemaStore schemaStore = storageEngine.testAccessNeoStores().getSchemaStore();
SchemaRule indexRule = single( filter( rule -> rule instanceof StoreIndexDescriptor, schemaStore.loadAllSchemaRules() ) );
setOwnerNull( schemaStore, (StoreIndexDescriptor) indexRule );
// At this point the SchemaCache doesn't know about this change so we have to reload it
storageEngine.loadSchemaCache();
try ( Transaction tx = db.beginTx() )
{
single( db.schema().getConstraints( label ).iterator() ).drop();
tx.success();
}
// then
try ( Transaction ignore = db.beginTx() )
{
assertFalse( db.schema().getConstraints().iterator().hasNext() );
assertFalse( db.schema().getIndexes().iterator().hasNext() );
}
}
@Test
public void shouldDropUniquenessConstraintWhereConstraintRecordIsMissing() throws Exception
{
// given
try ( Transaction tx = db.beginTx() )
{
db.schema().constraintFor( label ).assertPropertyIsUnique( key ).create();
tx.success();
}
// when intentionally breaking the schema by setting the backing index rule to unused
RecordStorageEngine storageEngine = db.getDependencyResolver().resolveDependency( RecordStorageEngine.class );
SchemaStore schemaStore = storageEngine.testAccessNeoStores().getSchemaStore();
SchemaRule indexRule = single( filter( rule -> rule instanceof ConstraintRule, schemaStore.loadAllSchemaRules() ) );
setSchemaRecordNotInUse( schemaStore, indexRule.getId() );
// At this point the SchemaCache doesn't know about this change so we have to reload it
storageEngine.loadSchemaCache();
try ( Transaction tx = db.beginTx() )
{
// We don't use single() here, because it is okay for the schema cache reload to clean up after us.
db.schema().getConstraints( label ).forEach( ConstraintDefinition::drop );
db.schema().getIndexes( label ).forEach( IndexDefinition::drop );
tx.success();
}
// then
try ( Transaction ignore = db.beginTx() )
{
assertFalse( db.schema().getConstraints().iterator().hasNext() );
assertFalse( db.schema().getIndexes().iterator().hasNext() );
}
}
@Test
public void shouldDropUniquenessConstraintWhereConstraintRecordIsMissingAndIndexHasNoOwner() throws Exception
{
// given
try ( Transaction tx = db.beginTx() )
{
db.schema().constraintFor( label ).assertPropertyIsUnique( key ).create();
tx.success();
}
// when intentionally breaking the schema by setting the backing index rule to unused
RecordStorageEngine storageEngine = db.getDependencyResolver().resolveDependency( RecordStorageEngine.class );
SchemaStore schemaStore = storageEngine.testAccessNeoStores().getSchemaStore();
SchemaRule constraintRule = single( filter( rule -> rule instanceof ConstraintRule, schemaStore.loadAllSchemaRules() ) );
setSchemaRecordNotInUse( schemaStore, constraintRule.getId() );
SchemaRule indexRule = single( filter( rule -> rule instanceof StoreIndexDescriptor, schemaStore.loadAllSchemaRules() ) );
setOwnerNull( schemaStore, (StoreIndexDescriptor) indexRule );
// At this point the SchemaCache doesn't know about this change so we have to reload it
storageEngine.loadSchemaCache();
try ( Transaction tx = db.beginTx() )
{
// We don't use single() here, because it is okay for the schema cache reload to clean up after us.
db.schema().getConstraints( label ).forEach( ConstraintDefinition::drop );
db.schema().getIndexes( label ).forEach( IndexDefinition::drop );
tx.success();
}
// then
try ( Transaction ignore = db.beginTx() )
{
assertFalse( db.schema().getConstraints().iterator().hasNext() );
assertFalse( db.schema().getIndexes().iterator().hasNext() );
}
}
private void setOwnerNull( SchemaStore schemaStore, StoreIndexDescriptor rule )
{
rule = rule.withOwningConstraint( null );
List<DynamicRecord> dynamicRecords = schemaStore.allocateFrom( rule );
for ( DynamicRecord record : dynamicRecords )
{
schemaStore.updateRecord( record );
}
}
private void setSchemaRecordNotInUse( SchemaStore schemaStore, long id )
{
DynamicRecord record = schemaStore.newRecord();
record.setId( id );
record.setInUse( false );
schemaStore.updateRecord( record );
}
}