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DatabaseShutdownTest.java
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DatabaseShutdownTest.java
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/*
* Copyright (c) 2002-2017 "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 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 db;
import org.junit.Rule;
import org.junit.Test;
import java.io.File;
import java.io.IOException;
import java.lang.reflect.Field;
import java.util.function.Supplier;
import org.neo4j.graphdb.GraphDatabaseService;
import org.neo4j.io.fs.FileSystemAbstraction;
import org.neo4j.io.pagecache.DelegatingPageCache;
import org.neo4j.io.pagecache.IOLimiter;
import org.neo4j.io.pagecache.PageCache;
import org.neo4j.kernel.NeoStoreDataSource;
import org.neo4j.kernel.configuration.Config;
import org.neo4j.kernel.impl.factory.CommunityEditionModule;
import org.neo4j.kernel.impl.factory.DataSourceModule;
import org.neo4j.kernel.impl.factory.DatabaseInfo;
import org.neo4j.kernel.impl.factory.EditionModule;
import org.neo4j.kernel.impl.factory.GraphDatabaseFacade;
import org.neo4j.kernel.impl.factory.GraphDatabaseFacadeFactory;
import org.neo4j.kernel.impl.factory.PlatformModule;
import org.neo4j.kernel.impl.logging.LogService;
import org.neo4j.kernel.impl.query.QueryExecutionEngine;
import org.neo4j.kernel.lifecycle.LifeSupport;
import org.neo4j.kernel.lifecycle.LifecycleException;
import org.neo4j.kernel.lifecycle.LifecycleStatus;
import org.neo4j.kernel.monitoring.tracing.Tracers;
import org.neo4j.test.TestGraphDatabaseFactory;
import org.neo4j.test.rule.TestDirectory;
import org.neo4j.test.rule.fs.EphemeralFileSystemRule;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.fail;
public class DatabaseShutdownTest
{
@Rule
public final EphemeralFileSystemRule fs = new EphemeralFileSystemRule();
@Rule
public final TestDirectory testDirectory =
TestDirectory.testDirectory( getClass(), fs.get() );
@Test
public void shouldShutdownCorrectlyWhenCheckPointingOnShutdownFails() throws Exception
{
TestGraphDatabaseFactoryWithFailingPageCacheFlush factory =
new TestGraphDatabaseFactoryWithFailingPageCacheFlush();
try
{
factory.newEmbeddedDatabase( testDirectory.graphDbDir() ).shutdown();
fail( "Should have thrown" );
}
catch ( LifecycleException ex )
{
assertEquals( LifecycleStatus.SHUTDOWN, factory.getNeoStoreDataSourceStatus() );
}
}
private static class TestGraphDatabaseFactoryWithFailingPageCacheFlush extends TestGraphDatabaseFactory
{
private NeoStoreDataSource neoStoreDataSource;
@Override
protected GraphDatabaseService newEmbeddedDatabase( File storeDir, Config config,
GraphDatabaseFacadeFactory.Dependencies dependencies )
{
return new GraphDatabaseFacadeFactory( DatabaseInfo.COMMUNITY, CommunityEditionModule::new )
{
@Override
protected DataSourceModule createDataSource(
PlatformModule platformModule,
EditionModule editionModule,
Supplier<QueryExecutionEngine> queryEngine )
{
DataSourceModule dataSource = new DataSourceModule( platformModule, editionModule, queryEngine );
neoStoreDataSource = dataSource.neoStoreDataSource;
return dataSource;
}
@Override
protected PlatformModule createPlatform( File storeDir, Config config,
Dependencies dependencies, GraphDatabaseFacade graphDatabaseFacade )
{
return new PlatformModule( storeDir, config, databaseInfo, dependencies, graphDatabaseFacade )
{
@Override
protected PageCache createPageCache( FileSystemAbstraction fileSystem, Config config,
LogService logging, Tracers tracers )
{
PageCache pageCache = super.createPageCache( fileSystem, config, logging, tracers );
return new DelegatingPageCache( pageCache )
{
@Override
public void flushAndForce( IOLimiter ioLimiter ) throws IOException
{
// this is simulating a failing check pointing on shutdown
throw new IOException( "Boom!" );
}
};
}
};
}
}.newFacade( storeDir, config, dependencies );
}
LifecycleStatus getNeoStoreDataSourceStatus() throws NoSuchFieldException, IllegalAccessException
{
Field f = neoStoreDataSource.getClass().getDeclaredField( "life" );
f.setAccessible( true );
LifeSupport life = (LifeSupport) f.get( neoStoreDataSource );
return life.getStatus();
}
}
}