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OnlineBackupCommandProvider.java
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OnlineBackupCommandProvider.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.backup.impl;
import java.nio.file.Path;
import java.util.function.Supplier;
import javax.annotation.Nonnull;
import org.neo4j.OnlineBackupCommandSection;
import org.neo4j.commandline.admin.AdminCommand;
import org.neo4j.commandline.admin.AdminCommandSection;
import org.neo4j.commandline.admin.OutsideWorld;
import org.neo4j.commandline.arguments.Arguments;
import org.neo4j.kernel.monitoring.Monitors;
import org.neo4j.logging.FormattedLogProvider;
import org.neo4j.logging.Level;
import org.neo4j.logging.LogProvider;
import static java.lang.String.format;
import static org.neo4j.backup.impl.BackupSupportingClassesFactoryProvider.getProvidersByPriority;
public class OnlineBackupCommandProvider extends AdminCommand.Provider
{
public OnlineBackupCommandProvider()
{
super( "backup" );
}
@Override
@Nonnull
public Arguments allArguments()
{
return OnlineBackupContextBuilder.arguments();
}
@Override
@Nonnull
public String description()
{
return format( "Perform an online backup from a running Neo4j enterprise server. Neo4j's backup service must " +
"have been configured on the server beforehand.%n" +
"%n" +
"All consistency checks except 'cc-graph' can be quite expensive so it may be useful to turn them off" +
" for very large databases. Increasing the heap size can also be a good idea." +
" See 'neo4j-admin help' for details.%n" +
"%n" +
"For more information see: https://neo4j.com/docs/operations-manual/current/backup/" );
}
@Override
@Nonnull
public String summary()
{
return "Perform an online backup from a running Neo4j enterprise server.";
}
@Override
@Nonnull
public AdminCommandSection commandSection()
{
return OnlineBackupCommandSection.instance();
}
@Override
@Nonnull
public AdminCommand create( Path homeDir, Path configDir, OutsideWorld outsideWorld )
{
boolean debug = System.getenv().get( "NEO4J_DEBUG") != null;
LogProvider logProvider = FormattedLogProvider.withDefaultLogLevel( debug ? Level.DEBUG : Level.NONE ).toOutputStream( outsideWorld.outStream() );
Monitors monitors = new Monitors();
OnlineBackupContextBuilder contextBuilder = new OnlineBackupContextBuilder( homeDir, configDir );
BackupModule backupModule = new BackupModule( outsideWorld, logProvider, monitors );
BackupSupportingClassesFactoryProvider classesFactoryProvider =
getProvidersByPriority().findFirst().orElseThrow( noProviderException() );
BackupSupportingClassesFactory supportingClassesFactory =
classesFactoryProvider.getFactory( backupModule );
BackupStrategyCoordinatorFactory coordinatorFactory = new BackupStrategyCoordinatorFactory( backupModule );
return new OnlineBackupCommand(
outsideWorld, contextBuilder, supportingClassesFactory, coordinatorFactory );
}
private static Supplier<IllegalStateException> noProviderException()
{
return () -> new IllegalStateException(
"Unable to find a suitable backup supporting classes provider in the classpath" );
}
}