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EmbeddedGraphDatabase.java
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EmbeddedGraphDatabase.java
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/*
* Copyright (c) 2002-2019 "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.graphdb.facade.embedded;
import java.io.File;
import java.util.Map;
import org.neo4j.graphdb.GraphDatabaseService;
import org.neo4j.graphdb.facade.GraphDatabaseDependencies;
import org.neo4j.graphdb.facade.GraphDatabaseFacadeFactory;
import org.neo4j.graphdb.factory.GraphDatabaseSettings;
import org.neo4j.graphdb.factory.module.PlatformModule;
import org.neo4j.graphdb.factory.module.edition.AbstractEditionModule;
import org.neo4j.graphdb.factory.module.edition.CommunityEditionModule;
import org.neo4j.kernel.availability.AvailabilityGuard;
import org.neo4j.kernel.availability.AvailabilityGuardInstaller;
import org.neo4j.kernel.configuration.Config;
import org.neo4j.kernel.impl.factory.DatabaseInfo;
import org.neo4j.kernel.impl.factory.GraphDatabaseFacade;
import static org.neo4j.graphdb.facade.GraphDatabaseDependencies.newDependencies;
import static org.neo4j.helpers.collection.Iterables.append;
import static org.neo4j.helpers.collection.Iterables.asList;
/**
* An implementation of {@link GraphDatabaseService} that is used to embed Neo4j
* in an application. You typically instantiate it by using
* {@link org.neo4j.graphdb.factory.GraphDatabaseFactory} like so:
* <p>
*
* <pre>
* <code>
* GraphDatabaseService graphDb = new GraphDatabaseFactory().newEmbeddedDatabase( "var/graphdb" );
* // ... use Neo4j
* graphDb.shutdown();
* </code>
* </pre>
* <p>
* For more information, see {@link GraphDatabaseService}.
*/
public class EmbeddedGraphDatabase extends GraphDatabaseFacade
{
/**
* No-op availability guard installer by default
*/
private final AvailabilityGuardInstaller availabilityGuardInstaller;
/**
* Internal constructor used by {@link org.neo4j.graphdb.factory.GraphDatabaseFactory}
*/
public EmbeddedGraphDatabase( File storeDir,
Map<String, String> params,
GraphDatabaseFacadeFactory.Dependencies dependencies )
{
this.availabilityGuardInstaller = availabilityGuard -> {};
create( storeDir, params, dependencies );
}
/**
* Internal constructor used by ImpermanentGraphDatabase
*/
protected EmbeddedGraphDatabase( File storeDir,
Config config,
GraphDatabaseFacadeFactory.Dependencies dependencies )
{
this( storeDir, config, dependencies, availabilityGuard -> {} );
}
protected EmbeddedGraphDatabase( File storeDir, Config config, GraphDatabaseFacadeFactory.Dependencies dependencies,
AvailabilityGuardInstaller availabilityGuardInstaller )
{
this.availabilityGuardInstaller = availabilityGuardInstaller;
create( storeDir, config, dependencies );
}
protected void create( File storeDir, Map<String,String> params,
GraphDatabaseFacadeFactory.Dependencies dependencies )
{
GraphDatabaseDependencies newDependencies = newDependencies( dependencies )
.settingsClasses( asList( append( GraphDatabaseSettings.class, dependencies.settingsClasses() ) ) );
new GraphDatabaseFacadeFactory( DatabaseInfo.COMMUNITY, this::editionModuleFactory )
.initFacade( storeDir, params, newDependencies, this );
}
protected void create( File storeDir, Config config, GraphDatabaseFacadeFactory.Dependencies dependencies )
{
GraphDatabaseDependencies newDependencies = newDependencies( dependencies )
.settingsClasses( asList( append( GraphDatabaseSettings.class, dependencies.settingsClasses() ) ) );
new GraphDatabaseFacadeFactory( DatabaseInfo.COMMUNITY, this::editionModuleFactory )
.initFacade( storeDir, config, newDependencies, this );
}
protected AbstractEditionModule editionModuleFactory( PlatformModule platform )
{
CommunityEditionModule edition = new CommunityEditionModule( platform );
AvailabilityGuard guard = edition.getGlobalAvailabilityGuard( platform.clock, platform.logging, platform.config );
availabilityGuardInstaller.install( guard );
return edition;
}
}