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UniquenessConstraintValidationHAIT.java
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UniquenessConstraintValidationHAIT.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 Affero 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 Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
package org.neo4j.ha;
import org.junit.ClassRule;
import org.junit.Rule;
import org.junit.Test;
import java.util.concurrent.Future;
import org.neo4j.graphdb.GraphDatabaseService;
import org.neo4j.graphdb.Label;
import org.neo4j.graphdb.Transaction;
import org.neo4j.kernel.ha.HighlyAvailableGraphDatabase;
import org.neo4j.kernel.impl.ha.ClusterManager;
import org.neo4j.kernel.impl.util.Listener;
import org.neo4j.test.OtherThreadRule;
import org.neo4j.test.ha.ClusterRule;
import static org.junit.Assert.assertFalse;
import static org.junit.Assert.assertThat;
import static org.junit.Assert.assertTrue;
import static org.neo4j.graphdb.DynamicLabel.label;
import static org.neo4j.kernel.impl.api.integrationtest.UniquenessConstraintValidationConcurrencyIT.createNode;
import static org.neo4j.test.OtherThreadRule.isWaiting;
public class UniquenessConstraintValidationHAIT
{
private static final Label LABEL = label( "Label1" );
private static final String PROPERTY_KEY = "key1";
@Rule
public final OtherThreadRule<Void> otherThread = new OtherThreadRule<>();
@ClassRule
public static final ClusterRule clusterRule = new ClusterRule( UniquenessConstraintValidationHAIT.class )
.withInitialDataset( uniquenessConstraint( LABEL, PROPERTY_KEY ) );
@Test
public void shouldAllowCreationOfNonConflictingDataOnSeparateHosts() throws Exception
{
// given
ClusterManager.ManagedCluster cluster = clusterRule.startCluster();
HighlyAvailableGraphDatabase slave1 = cluster.getAnySlave();
HighlyAvailableGraphDatabase slave2 = cluster.getAnySlave( /*except:*/slave1 );
// when
Future<Boolean> created;
try ( Transaction tx = slave1.beginTx() )
{
slave1.createNode( LABEL ).setProperty( PROPERTY_KEY, "value1" );
created = otherThread.execute( createNode( slave2, LABEL.name(), PROPERTY_KEY, "value2" ) );
tx.success();
}
// then
assertTrue( "creating non-conflicting data should pass", created.get() );
}
@Test
public void shouldPreventConcurrentCreationOfConflictingDataOnSeparateHosts() throws Exception
{
// given
ClusterManager.ManagedCluster cluster = clusterRule.startCluster();
HighlyAvailableGraphDatabase slave1 = cluster.getAnySlave();
HighlyAvailableGraphDatabase slave2 = cluster.getAnySlave( /*except:*/slave1 );
// when
Future<Boolean> created;
try ( Transaction tx = slave1.beginTx() )
{
slave1.createNode( LABEL ).setProperty( PROPERTY_KEY, "value3" );
created = otherThread.execute( createNode( slave2, LABEL.name(), PROPERTY_KEY, "value3" ) );
assertThat( otherThread, isWaiting() );
tx.success();
}
// then
assertFalse( "creating violating data should fail", created.get() );
}
@Test
public void shouldPreventConcurrentCreationOfConflictingNonStringPropertyOnMasterAndSlave() throws Exception
{
// given
ClusterManager.ManagedCluster cluster = clusterRule.startCluster();
HighlyAvailableGraphDatabase master = cluster.getMaster();
HighlyAvailableGraphDatabase slave = cluster.getAnySlave();
// when
Future<Boolean> created;
try ( Transaction tx = master.beginTx() )
{
master.createNode( LABEL ).setProperty( PROPERTY_KEY, 0x0099CC );
created = otherThread.execute( createNode( slave, LABEL.name(), PROPERTY_KEY, 0x0099CC ) );
assertThat( otherThread, isWaiting() );
tx.success();
}
// then
assertFalse( "creating violating data should fail", created.get() );
}
@Test
public void shouldAllowOtherHostToCompleteIfFirstHostRollsBackTransaction() throws Exception
{
// given
ClusterManager.ManagedCluster cluster = clusterRule.startCluster();
HighlyAvailableGraphDatabase slave1 = cluster.getAnySlave();
HighlyAvailableGraphDatabase slave2 = cluster.getAnySlave( /*except:*/slave1 );
// when
Future<Boolean> created;
try ( Transaction tx = slave1.beginTx() )
{
slave1.createNode( LABEL ).setProperty( PROPERTY_KEY, "value4" );
created = otherThread.execute( createNode( slave2, LABEL.name(), PROPERTY_KEY, "value4" ) );
assertThat( otherThread, isWaiting() );
tx.failure();
}
// then
assertTrue( "creating data that conflicts only with rolled back data should pass", created.get() );
}
private static Listener<GraphDatabaseService> uniquenessConstraint( final Label label, final String propertyKey )
{
return new Listener<GraphDatabaseService>()
{
@Override
public void receive( GraphDatabaseService db )
{
try ( Transaction tx = db.beginTx() )
{
db.schema().constraintFor( label ).assertPropertyIsUnique( propertyKey ).create();
tx.success();
}
}
};
}
}