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CopiedStoreRecovery.java
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CopiedStoreRecovery.java
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/*
* Copyright (c) 2002-2018 "Neo4j,"
* Neo4j Sweden AB [http://neo4j.com]
*
* This file is part of Neo4j Enterprise Edition. The included source
* code can be redistributed and/or modified under the terms of the
* GNU AFFERO GENERAL PUBLIC LICENSE Version 3
* (http://www.fsf.org/licensing/licenses/agpl-3.0.html) with the
* Commons Clause, as found in the associated LICENSE.txt file.
*
* 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.
*
* Neo4j object code can be licensed independently from the source
* under separate terms from the AGPL. Inquiries can be directed to:
* licensing@neo4j.com
*
* More information is also available at:
* https://neo4j.com/licensing/
*/
package org.neo4j.causalclustering.catchup.storecopy;
import java.io.File;
import org.neo4j.graphdb.GraphDatabaseService;
import org.neo4j.graphdb.factory.GraphDatabaseSettings;
import org.neo4j.helpers.Exceptions;
import org.neo4j.io.fs.FileUtils;
import org.neo4j.io.layout.DatabaseLayout;
import org.neo4j.io.pagecache.PageCache;
import org.neo4j.kernel.configuration.Config;
import org.neo4j.kernel.configuration.Settings;
import org.neo4j.kernel.extension.KernelExtensionFactory;
import org.neo4j.kernel.impl.enterprise.configuration.OnlineBackupSettings;
import org.neo4j.kernel.impl.storemigration.UpgradeNotAllowedByConfigurationException;
import org.neo4j.kernel.internal.locker.StoreLocker;
import org.neo4j.kernel.lifecycle.LifecycleAdapter;
import org.neo4j.logging.NullLogProvider;
import static org.neo4j.com.storecopy.ExternallyManagedPageCache.graphDatabaseFactoryWithPageCache;
public class CopiedStoreRecovery extends LifecycleAdapter
{
private final Config config;
private final Iterable<KernelExtensionFactory<?>> kernelExtensions;
private final PageCache pageCache;
private boolean shutdown;
public CopiedStoreRecovery( Config config, Iterable<KernelExtensionFactory<?>> kernelExtensions,
PageCache pageCache )
{
this.config = config;
this.kernelExtensions = kernelExtensions;
this.pageCache = pageCache;
}
@Override
public synchronized void shutdown()
{
shutdown = true;
}
public synchronized void recoverCopiedStore( DatabaseLayout databaseLayout ) throws DatabaseShutdownException
{
if ( shutdown )
{
throw new DatabaseShutdownException( "Abort store-copied store recovery due to database shutdown" );
}
try
{
GraphDatabaseService graphDatabaseService = newTempDatabase( databaseLayout.databaseDirectory() );
graphDatabaseService.shutdown();
// as soon as recovery will be extracted we will not gonna need this
File lockFile = new File( databaseLayout.getDatabasesDirectory(), StoreLocker.STORE_LOCK_FILENAME );
if ( lockFile.exists() )
{
FileUtils.deleteFile( lockFile );
}
}
catch ( Exception e )
{
Throwable peeled = Exceptions.peel( e, t -> !(t instanceof UpgradeNotAllowedByConfigurationException) );
if ( peeled != null )
{
throw new RuntimeException( failedToStartMessage(), e );
}
else
{
throw e;
}
}
}
private String failedToStartMessage()
{
String recordFormat = config.get( GraphDatabaseSettings.record_format );
return String.format( "Failed to start database with copied store. This may be because the core servers and " +
"read replicas have a different record format. On this machine: `%s=%s`. Check the equivalent" +
" value on the core server.",
GraphDatabaseSettings.record_format.name(), recordFormat );
}
private GraphDatabaseService newTempDatabase( File tempStore )
{
return graphDatabaseFactoryWithPageCache( pageCache )
.setKernelExtensions( kernelExtensions )
.setUserLogProvider( NullLogProvider.getInstance() )
.newEmbeddedDatabaseBuilder( tempStore )
.setConfig( OnlineBackupSettings.online_backup_enabled, Settings.FALSE )
.setConfig( GraphDatabaseSettings.pagecache_warmup_enabled, Settings.FALSE )
.setConfig( GraphDatabaseSettings.keep_logical_logs, Settings.FALSE )
.setConfig( GraphDatabaseSettings.allow_upgrade,
config.get( GraphDatabaseSettings.allow_upgrade ).toString() )
.setConfig( GraphDatabaseSettings.record_format, config.get( GraphDatabaseSettings.record_format ) )
.newGraphDatabase();
}
}