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DefaultDatabaseManager.java
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DefaultDatabaseManager.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.dmbs.database;
import java.util.Optional;
import org.neo4j.dbms.database.DatabaseManager;
import org.neo4j.graphdb.facade.spi.ClassicCoreSPI;
import org.neo4j.graphdb.factory.module.DataSourceModule;
import org.neo4j.graphdb.factory.module.EditionModule;
import org.neo4j.graphdb.factory.module.PlatformModule;
import org.neo4j.kernel.impl.factory.GraphDatabaseFacade;
import org.neo4j.kernel.impl.proc.Procedures;
import org.neo4j.kernel.lifecycle.LifecycleAdapter;
import org.neo4j.logging.Logger;
public final class DefaultDatabaseManager extends LifecycleAdapter implements DatabaseManager
{
private GraphDatabaseFacade database;
private final PlatformModule platform;
private final EditionModule edition;
private final Procedures procedures;
private final Logger msgLog;
private final GraphDatabaseFacade graphDatabaseFacade;
public DefaultDatabaseManager( PlatformModule platform, EditionModule edition, Procedures procedures,
Logger msgLog, GraphDatabaseFacade graphDatabaseFacade )
{
this.platform = platform;
this.edition = edition;
this.procedures = procedures;
this.msgLog = msgLog;
this.graphDatabaseFacade = graphDatabaseFacade;
}
@Override
public Optional<GraphDatabaseFacade> getDatabaseFacade( String name )
{
return Optional.ofNullable( database );
}
@Override
public GraphDatabaseFacade createDatabase( String name )
{
if ( database == null )
{
DataSourceModule dataSource = new DataSourceModule( name, platform, edition, procedures, graphDatabaseFacade );
ClassicCoreSPI spi = new ClassicCoreSPI( platform, dataSource, msgLog, edition.coreAPIAvailabilityGuard );
graphDatabaseFacade.init( spi, platform.threadToTransactionBridge, platform.config, dataSource.tokenHolders );
platform.dataSourceManager.register( dataSource.neoStoreDataSource );
database = graphDatabaseFacade;
return database;
}
else
{
throw new IllegalStateException( "Database is already created, fail to create another one." );
}
}
@Override
public synchronized void shutdownDatabase( String ignore )
{
shutdownDatabase();
}
@Override
public void stop()
{
shutdownDatabase();
}
private void shutdownDatabase()
{
if ( database != null )
{
database.shutdown();
}
}
}