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BackupReadReplicaIT.java
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BackupReadReplicaIT.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 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.causalclustering.backup;
import org.junit.Before;
import org.junit.Rule;
import org.junit.Test;
import java.io.File;
import java.io.IOException;
import java.net.InetSocketAddress;
import java.net.ServerSocket;
import java.util.concurrent.TimeUnit;
import org.neo4j.backup.OnlineBackupSettings;
import org.neo4j.causalclustering.core.CausalClusteringSettings;
import org.neo4j.causalclustering.core.CoreGraphDatabase;
import org.neo4j.causalclustering.discovery.Cluster;
import org.neo4j.causalclustering.readreplica.ReadReplicaGraphDatabase;
import org.neo4j.kernel.configuration.Config;
import org.neo4j.kernel.configuration.Settings;
import org.neo4j.kernel.impl.transaction.log.TransactionIdStore;
import org.neo4j.test.DbRepresentation;
import org.neo4j.test.causalclustering.ClusterRule;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertNotEquals;
import static org.neo4j.backup.OnlineBackupCommandIT.runBackupToolFromOtherJvmToGetExitCode;
import static org.neo4j.causalclustering.helpers.BackupUtil.backupArguments;
import static org.neo4j.causalclustering.helpers.BackupUtil.getConfig;
import static org.neo4j.causalclustering.helpers.DataCreator.createSomeData;
import static org.neo4j.function.Predicates.awaitEx;
public class BackupReadReplicaIT
{
private int backupPort = findFreePort( 22000, 23000 );
@Rule
public ClusterRule clusterRule = new ClusterRule( BackupReadReplicaIT.class ).withNumberOfCoreMembers( 3 )
.withSharedCoreParam( OnlineBackupSettings.online_backup_enabled, Settings.FALSE )
.withNumberOfReadReplicas( 1 )
.withSharedReadReplicaParam( OnlineBackupSettings.online_backup_enabled, Settings.TRUE )
.withInstanceReadReplicaParam( OnlineBackupSettings.online_backup_server, serverId -> ":" + backupPort );
private Cluster cluster;
private File backupPath;
@Before
public void setup() throws Exception
{
backupPath = clusterRule.testDirectory().cleanDirectory( "backup-db" );
cluster = clusterRule.startCluster();
}
private boolean readReplicasUpToDateAsTheLeader( CoreGraphDatabase leader, ReadReplicaGraphDatabase readReplica )
{
long leaderTxId = leader.getDependencyResolver().resolveDependency( TransactionIdStore.class )
.getLastClosedTransactionId();
long lastClosedTxId = readReplica.getDependencyResolver().resolveDependency( TransactionIdStore.class )
.getLastClosedTransactionId();
return lastClosedTxId == leaderTxId;
}
@Test
public void makeSureBackupCanBePerformed() throws Throwable
{
// Run backup
CoreGraphDatabase leader = createSomeData( cluster );
ReadReplicaGraphDatabase readReplica = cluster.findAnyReadReplica().database();
awaitEx( () -> readReplicasUpToDateAsTheLeader( leader, readReplica ), 1, TimeUnit.MINUTES );
DbRepresentation beforeChange = DbRepresentation.of( readReplica );
String backupAddress = this.backupAddress( readReplica );
String[] args = backupArguments( backupAddress, backupPath, "readreplica" );
assertEquals( 0, runBackupToolFromOtherJvmToGetExitCode( clusterRule.clusterDirectory(), args ) );
// Add some new data
DbRepresentation afterChange = DbRepresentation.of( createSomeData( cluster ) );
// Verify that backed up database can be started and compare representation
DbRepresentation backupRepresentation =
DbRepresentation.of( new File( backupPath, "readreplica" ), getConfig() );
assertEquals( beforeChange, backupRepresentation );
assertNotEquals( backupRepresentation, afterChange );
}
private String backupAddress( ReadReplicaGraphDatabase readReplica )
{
InetSocketAddress inetSocketAddress = readReplica.getDependencyResolver()
.resolveDependency( Config.class ).get( CausalClusteringSettings.transaction_advertised_address )
.socketAddress();
return inetSocketAddress.getHostName() + ":" + backupPort;
}
private static int findFreePort( int startRange, int endRange )
{
InetSocketAddress address = null;
RuntimeException ex = null;
for ( int port = startRange; port <= endRange; port++ )
{
address = new InetSocketAddress( port );
try
{
new ServerSocket( address.getPort(), 100, address.getAddress() ).close();
ex = null;
break;
}
catch ( IOException e )
{
ex = new RuntimeException( e );
}
}
if ( ex != null )
{
throw ex;
}
assert address != null;
return address.getPort();
}
}