package org.neo4j.onlinebackup;
import static org.junit.Assert.assertEquals;
import java.io.File;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
import org.junit.Before;
import org.junit.Test;
import org.neo4j.graphdb.Node;
import org.neo4j.graphdb.Relationship;
import org.neo4j.graphdb.RelationshipType;
import org.neo4j.graphdb.Transaction;
import org.neo4j.index.IndexService;
import org.neo4j.index.lucene.LuceneDataSource;
import org.neo4j.index.lucene.LuceneIndexService;
import org.neo4j.kernel.EmbeddedGraphDatabase;
import org.neo4j.kernel.impl.nioneo.xa.NeoStoreXaDataSource;
import org.neo4j.kernel.impl.transaction.XaDataSourceManager;
import org.neo4j.kernel.impl.transaction.xaframework.XaDataSource;
/**
* Try to backup Neo and a Lucene data source to another running Neo+Lucene.
*/
public class MultiRunningTest
{
private static enum MyRels implements RelationshipType
{
TEST
}
private static final String FILE_SEP = System
.getProperty( "file.separator" );
private static final String TARGET_DIR = "target";
private static final String VAR = TARGET_DIR + FILE_SEP + "var";
private static final String STORE_LOCATION_DIR = VAR + FILE_SEP + "neo-db";
private static final String BACKUP_LOCATION_DIR = VAR + FILE_SEP
+ "neo-backup";
@Before
public void setup()
{
Util.deleteDir( new File( VAR ) );
System.out
.println( "setting up database and backup-copy including Lucene" );
EmbeddedGraphDatabase neo = Util.startNeoInstance( STORE_LOCATION_DIR );
XaDataSource neoStoreXaDataSource = neo.getConfig()
.getPersistenceModule().getPersistenceManager()
.getPersistenceSource().getXaDataSource();
neoStoreXaDataSource.keepLogicalLogs( true );
IndexService indexService = new LuceneIndexService( neo );
XaDataSourceManager xaDsm = neo.getConfig().getTxModule()
.getXaDataSourceManager();
XaDataSource ds = xaDsm.getXaDataSource( "lucene" );
((LuceneDataSource) ds).keepLogicalLogs( true );
Transaction tx = neo.beginTx();
try
{
indexService.index( addNode( neo ), "number", 1 );
tx.success();
}
finally
{
tx.finish();
}
Util.stopNeo( neo, indexService );
Util.copyDir( STORE_LOCATION_DIR, BACKUP_LOCATION_DIR );
}
@Test
public void backup() throws IOException
{
System.out.println( "starting tests" );
EmbeddedGraphDatabase neo = Util.startNeoInstance( STORE_LOCATION_DIR );
((NeoStoreXaDataSource) neo.getConfig().getPersistenceModule()
.getPersistenceManager().getPersistenceSource()
.getXaDataSource()).keepLogicalLogs( true );
IndexService indexService = new LuceneIndexService( neo );
XaDataSourceManager xaDsm = neo.getConfig().getTxModule()
.getXaDataSourceManager();
XaDataSource ds = xaDsm.getXaDataSource( "lucene" );
((LuceneDataSource) ds).keepLogicalLogs( true );
System.out.println( "backing up original db without any changes" );
tryBackup( neo, BACKUP_LOCATION_DIR, 1 );
Transaction tx = neo.beginTx();
try
{
indexService.index( addNode( neo ), "number", 2 );
tx.success();
}
finally
{
tx.finish();
}
System.out.println( "one node added" );
tryBackup( neo, BACKUP_LOCATION_DIR, 2 );
tx = neo.beginTx();
try
{
indexService.index( addNode( neo ), "number", 3 );
tx.success();
}
finally
{
tx.finish();
}
System.out.println( "one node added" );
tx = neo.beginTx();
try
{
indexService.index( addNode( neo ), "number", 4 );
System.out.println( "one node added, not commited" );
tryBackup( neo, BACKUP_LOCATION_DIR, 3 );
tx.success();
}
finally
{
tx.finish();
}
System.out.println( "previous add commited" );
tryBackup( neo, BACKUP_LOCATION_DIR, 4 );
Util.stopNeo( neo, indexService );
}
protected void tryBackup( EmbeddedGraphDatabase neo, String location, int relCount )
throws IOException
{
setupBackup( neo, location );
EmbeddedGraphDatabase bNeo = Util.startNeoInstance( location );
IndexService bIndexService = new LuceneIndexService( bNeo );
Transaction bTx = bNeo.beginTx();
try
{
List<Relationship> rels = new ArrayList<Relationship>();
for ( Relationship rel : bNeo.getReferenceNode().getRelationships() )
{
rels.add( rel );
}
assertEquals( relCount, rels.size() );
Node node = bIndexService.getSingleNode( "number", relCount );
assertEquals( true, node != null );
assertEquals( node.getId(), (long) (Long) node.getProperty(
"theId", -1L ) );
bTx.success();
}
finally
{
bTx.finish();
}
Util.stopNeo( bNeo, bIndexService );
}
@SuppressWarnings( "serial" )
protected void setupBackup( EmbeddedGraphDatabase neo, String location )
throws IOException
{
EmbeddedGraphDatabase bNeo = Util.startNeoInstance( location );
IndexService bIndexService = new LuceneIndexService( bNeo );
Backup backupComp = new Neo4jBackup( neo, bNeo, new ArrayList<String>()
{
{
add( "nioneodb" );
add( "lucene" );
}
} );
backupComp.enableFileLogger();
backupComp.doBackup();
Util.stopNeo( bNeo, bIndexService );
}
private Node addNode( EmbeddedGraphDatabase neo )
{
Node referenceNode = neo.getReferenceNode();
Node node = neo.createNode();
node.setProperty( "theId", node.getId() );
referenceNode.createRelationshipTo( node, MyRels.TEST );
return node;
}
}