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TestStoreAccess.java
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TestStoreAccess.java
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/*
* Copyright (c) 2002-2016 "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 org.neo4j.kernel.impl.store;
import org.junit.Rule;
import org.junit.Test;
import java.io.File;
import java.io.IOException;
import org.neo4j.graphdb.GraphDatabaseService;
import org.neo4j.graphdb.Transaction;
import org.neo4j.graphdb.mockfs.EphemeralFileSystemAbstraction;
import org.neo4j.io.fs.FileSystemAbstraction;
import org.neo4j.io.pagecache.PageCache;
import org.neo4j.kernel.impl.recovery.RecoveryRequiredChecker;
import org.neo4j.test.TestGraphDatabaseFactory;
import org.neo4j.test.rule.PageCacheRule;
import org.neo4j.test.rule.fs.EphemeralFileSystemRule;
import static org.junit.Assert.assertTrue;
public class TestStoreAccess
{
@Rule
public final EphemeralFileSystemRule fs = new EphemeralFileSystemRule();
@Rule
public final PageCacheRule pageCacheRule = new PageCacheRule();
private final File storeDir = new File( "dir" ).getAbsoluteFile();
@Test
public void openingThroughStoreAccessShouldNotTriggerRecovery() throws Exception
{
EphemeralFileSystemAbstraction snapshot = produceUncleanStore();
assertTrue( "Store should be unclean", isUnclean( snapshot ) );
File messages = new File( storeDir, "debug.log" );
snapshot.deleteFile( messages );
PageCache pageCache = pageCacheRule.getPageCache( snapshot );
new StoreAccess( snapshot, pageCache, storeDir ).initialize().close();
assertTrue( "Store should be unclean", isUnclean( snapshot ) );
}
private EphemeralFileSystemAbstraction produceUncleanStore()
{
GraphDatabaseService db = new TestGraphDatabaseFactory().setFileSystem( fs.get() )
.newImpermanentDatabase( storeDir );
try ( Transaction tx = db.beginTx() )
{
db.createNode();
tx.success();
}
EphemeralFileSystemAbstraction snapshot = fs.get().snapshot();
db.shutdown();
return snapshot;
}
private boolean isUnclean( FileSystemAbstraction fileSystem ) throws IOException
{
PageCache pageCache = pageCacheRule.getPageCache( fileSystem );
return new RecoveryRequiredChecker( fileSystem, pageCache ).isRecoveryRequiredAt( storeDir );
}
}