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LocalDatabaseTest.java
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LocalDatabaseTest.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 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.causalclustering.catchup.storecopy;
import org.junit.Test;
import org.mockito.InOrder;
import java.io.File;
import java.time.Clock;
import org.neo4j.kernel.AvailabilityGuard;
import org.neo4j.kernel.impl.transaction.state.DataSourceManager;
import org.neo4j.kernel.impl.util.watcher.FileSystemWatcherService;
import org.neo4j.kernel.internal.DatabaseHealth;
import org.neo4j.logging.NullLog;
import org.neo4j.logging.NullLogProvider;
import static org.hamcrest.Matchers.containsString;
import static org.junit.Assert.assertFalse;
import static org.junit.Assert.assertNotNull;
import static org.junit.Assert.assertThat;
import static org.junit.Assert.assertTrue;
import static org.mockito.Matchers.any;
import static org.mockito.Mockito.inOrder;
import static org.mockito.Mockito.mock;
import static org.mockito.Mockito.reset;
import static org.mockito.Mockito.times;
import static org.mockito.Mockito.verify;
public class LocalDatabaseTest
{
@Test
public void availabilityGuardRaisedOnCreation() throws Throwable
{
AvailabilityGuard guard = newAvailabilityGuard();
assertTrue( guard.isAvailable() );
LocalDatabase localDatabase = newLocalDatabase( guard );
assertNotNull( localDatabase );
assertDatabaseIsStoppedAndUnavailable( guard );
}
@Test
public void availabilityGuardDroppedOnStart() throws Throwable
{
AvailabilityGuard guard = newAvailabilityGuard();
assertTrue( guard.isAvailable() );
LocalDatabase localDatabase = newLocalDatabase( guard );
assertFalse( guard.isAvailable() );
localDatabase.start();
assertTrue( guard.isAvailable() );
}
@Test
public void availabilityGuardRaisedOnStop() throws Throwable
{
AvailabilityGuard guard = newAvailabilityGuard();
assertTrue( guard.isAvailable() );
LocalDatabase localDatabase = newLocalDatabase( guard );
assertFalse( guard.isAvailable() );
localDatabase.start();
assertTrue( guard.isAvailable() );
localDatabase.stop();
assertDatabaseIsStoppedAndUnavailable( guard );
}
@Test
public void availabilityGuardRaisedOnStopForStoreCopy() throws Throwable
{
AvailabilityGuard guard = newAvailabilityGuard();
assertTrue( guard.isAvailable() );
LocalDatabase localDatabase = newLocalDatabase( guard );
assertFalse( guard.isAvailable() );
localDatabase.start();
assertTrue( guard.isAvailable() );
localDatabase.stopForStoreCopy();
assertDatabaseIsStoppedForStoreCopyAndUnavailable( guard );
}
@Test
public void availabilityGuardRaisedBeforeDataSourceManagerIsStopped() throws Throwable
{
AvailabilityGuard guard = mock( AvailabilityGuard.class );
DataSourceManager dataSourceManager = mock( DataSourceManager.class );
LocalDatabase localDatabase = newLocalDatabase( guard, dataSourceManager );
localDatabase.stop();
InOrder inOrder = inOrder( guard, dataSourceManager );
// guard should be raised twice - once during construction and once during stop
inOrder.verify( guard, times( 2 ) ).require( any() );
inOrder.verify( dataSourceManager ).stop();
}
@Test
public void availabilityGuardRaisedBeforeDataSourceManagerIsStoppedForStoreCopy() throws Throwable
{
AvailabilityGuard guard = mock( AvailabilityGuard.class );
DataSourceManager dataSourceManager = mock( DataSourceManager.class );
LocalDatabase localDatabase = newLocalDatabase( guard, dataSourceManager );
localDatabase.stopForStoreCopy();
InOrder inOrder = inOrder( guard, dataSourceManager );
// guard should be raised twice - once during construction and once during stop
inOrder.verify( guard, times( 2 ) ).require( any() );
inOrder.verify( dataSourceManager ).stop();
}
@Test
public void doNotRestartServicesIfAlreadyStarted() throws Throwable
{
DataSourceManager dataSourceManager = mock( DataSourceManager.class );
FileSystemWatcherService watcherService = mock( FileSystemWatcherService.class );
LocalDatabase localDatabase = newLocalDatabase( newAvailabilityGuard(), dataSourceManager, watcherService );
localDatabase.start();
verify( dataSourceManager ).start();
verify( watcherService ).start();
reset( dataSourceManager );
reset( watcherService );
localDatabase.start();
localDatabase.start();
verify( dataSourceManager, times( 0 ) ).start();
verify( watcherService, times( 0 ) ).start();
}
private static LocalDatabase newLocalDatabase( AvailabilityGuard availabilityGuard )
{
return newLocalDatabase( availabilityGuard, mock( DataSourceManager.class ) );
}
private static LocalDatabase newLocalDatabase( AvailabilityGuard availabilityGuard,
DataSourceManager dataSourceManager )
{
return newLocalDatabase( availabilityGuard, dataSourceManager, FileSystemWatcherService.EMPTY_WATCHER );
}
private static LocalDatabase newLocalDatabase( AvailabilityGuard availabilityGuard,
DataSourceManager dataSourceManager, FileSystemWatcherService fileWatcher )
{
return new LocalDatabase( new File( "." ), mock( StoreFiles.class ), dataSourceManager,
() -> mock( DatabaseHealth.class ), fileWatcher, availabilityGuard,
NullLogProvider.getInstance() );
}
private static AvailabilityGuard newAvailabilityGuard()
{
return new AvailabilityGuard( Clock.systemUTC(), NullLog.getInstance() );
}
private static void assertDatabaseIsStoppedAndUnavailable( AvailabilityGuard guard )
{
assertFalse( guard.isAvailable() );
assertThat( guard.describeWhoIsBlocking(), containsString( "Database is stopped" ) );
}
private static void assertDatabaseIsStoppedForStoreCopyAndUnavailable( AvailabilityGuard guard )
{
assertFalse( guard.isAvailable() );
assertThat( guard.describeWhoIsBlocking(), containsString( "Database is stopped to copy store" ) );
}
}