/**
* Copyright (c) 2002-2013 "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;
import java.io.File;
import java.util.Collections;
import java.util.HashMap;
import java.util.Map;
import java.util.TreeSet;
import javax.transaction.TransactionManager;
import org.neo4j.graphdb.GraphDatabaseService;
import org.neo4j.graphdb.RelationshipType;
import org.neo4j.graphdb.TransactionFailureException;
import org.neo4j.helpers.Service;
import org.neo4j.helpers.UTF8;
import org.neo4j.kernel.impl.core.LockReleaser;
import org.neo4j.kernel.impl.nioneo.store.NeoStore;
import org.neo4j.kernel.impl.nioneo.xa.NeoStoreXaDataSource;
import org.neo4j.kernel.impl.nioneo.xa.NioNeoDbPersistenceSource;
import org.neo4j.kernel.impl.transaction.LockManager;
import org.neo4j.kernel.impl.transaction.TxModule;
import org.neo4j.kernel.impl.transaction.xaframework.XaDataSource;
import org.neo4j.kernel.impl.util.FileUtils;
import org.neo4j.kernel.impl.util.StringLogger;
import android.app.ActivityManager;
import android.content.Context;
class GraphDbInstance
{
private boolean started = false;
private final boolean create;
private String storeDir;
GraphDbInstance( String storeDir, boolean create, Config config )
{
this.storeDir = storeDir;
this.create = create;
this.config = config;
}
private final Config config;
private NioNeoDbPersistenceSource persistenceSource = null;
public Config getConfig()
{
return config;
}
/**
* Starts Neo4j with default configuration
* @param graphDb The graph database service.
*
* @param storeDir path to directory where Neo4j store is located
* @param create if true a new Neo4j store will be created if no store exist
* at <CODE>storeDir</CODE>
* @param configuration parameters
* @throws StartupFailedException if unable to start
*/
public synchronized Map<Object, Object> start( GraphDatabaseService graphDb,
KernelExtensionLoader kernelExtensionLoader )
{
if ( started )
{
throw new IllegalStateException( "Neo4j instance already started" );
}
Map<Object, Object> params = config.getParams();
boolean useMemoryMapped = Boolean.parseBoolean( (String) config.getInputParams().get(
Config.USE_MEMORY_MAPPED_BUFFERS ) );
boolean dumpToConsole = Boolean.parseBoolean( (String) config.getInputParams().get(
Config.DUMP_CONFIGURATION ) );
storeDir = FileUtils.fixSeparatorsInPath( storeDir );
StringLogger logger = StringLogger.getLogger( storeDir );
AutoConfigurator autoConfigurator = new AutoConfigurator( config.getContext(), storeDir, useMemoryMapped, dumpToConsole );
autoConfigurator.configure( subset( config.getInputParams(), Config.USE_MEMORY_MAPPED_BUFFERS ) );
// params.putAll( config.getInputParams() );
String separator = System.getProperty( "file.separator" );
String store = storeDir + separator + NeoStore.DEFAULT_NAME;
params.put( "store_dir", storeDir );
params.put( "neo_store", store );
params.put( "create", String.valueOf( create ) );
String logicalLog = storeDir + separator + NeoStoreXaDataSource.LOGICAL_LOG_DEFAULT_NAME;
params.put( "logical_log", logicalLog );
params.put( LockManager.class, config.getLockManager() );
params.put( LockReleaser.class, config.getLockReleaser() );
kernelExtensionLoader.configureKernelExtensions();
config.getTxModule().registerDataSource( Config.DEFAULT_DATA_SOURCE_NAME,
Config.NIO_NEO_DB_CLASS, NeoStoreXaDataSource.BRANCH_ID, params );
// hack for lucene index recovery if in path
if ( !config.isReadOnly() || config.isBackupSlave() )
{
try
{
Class clazz = Class.forName( Config.LUCENE_DS_CLASS );
cleanWriteLocksInLuceneDirectory( storeDir + File.separator + "lucene" );
byte luceneId[] = UTF8.encode( "162373" );
registerLuceneDataSource( "lucene", clazz.getName(),
config.getTxModule(), storeDir + File.separator + "lucene",
config.getLockManager(), luceneId, params );
}
catch ( ClassNotFoundException e )
{ // ok index util not on class path
}
catch ( NoClassDefFoundError err )
{ // ok index util not on class path
}
try
{
Class clazz = Class.forName( Config.LUCENE_FULLTEXT_DS_CLASS );
cleanWriteLocksInLuceneDirectory( storeDir + File.separator + "lucene-fulltext" );
byte[] luceneId = UTF8.encode( "262374" );
registerLuceneDataSource( "lucene-fulltext",
clazz.getName(), config.getTxModule(),
storeDir + File.separator + "lucene-fulltext", config.getLockManager(),
luceneId, params );
}
catch ( ClassNotFoundException e )
{ // ok index util not on class path
}
catch ( NoClassDefFoundError err )
{ // ok index util not on class path
}
}
persistenceSource = new NioNeoDbPersistenceSource();
config.setPersistenceSource( Config.DEFAULT_DATA_SOURCE_NAME, create );
config.getIdGeneratorModule().setPersistenceSourceInstance(
persistenceSource );
config.getTxModule().init();
config.getPersistenceModule().init();
persistenceSource.init();
config.getIdGeneratorModule().init();
config.getGraphDbModule().init();
kernelExtensionLoader.initializeIndexProviders();
config.getTxModule().start();
config.getPersistenceModule().start( config.getTxModule().getTxManager(),
persistenceSource,
config.getSyncHookFactory(), config.getLockReleaser() );
persistenceSource.start( config.getTxModule().getXaDataSourceManager() );
config.getIdGeneratorModule().start();
config.getGraphDbModule().start( config.getLockReleaser(),
config.getPersistenceModule().getPersistenceManager(),
config.getRelationshipTypeCreator(), params );
logger.logMessage( "--- CONFIGURATION START ---" );
logger.logMessage( autoConfigurator.getNiceMemoryInformation() );
logger.logMessage( "Kernel version: " + Version.getKernel() );
for ( Version componentVersion : Service.load( Version.class ) )
{
logger.logMessage( componentVersion.toString() );
}
ActivityManager am = (ActivityManager)config.getContext().getSystemService(Context.ACTIVITY_SERVICE);
logger.logMessage( "Memory class: " + am.getMemoryClass());
// NOTE AHS: in the Java version you get a lot of VM info here, but it's just logging.
logger.logMessage( "--- CONFIGURATION END ---" );
logger.flush();
started = true;
return Collections.unmodifiableMap( params );
}
private static Map<Object, Object> subset( Map<Object, Object> source, String... keys )
{
Map<Object, Object> result = new HashMap<Object, Object>();
for ( String key : keys )
{
if ( source.containsKey( key ) )
{
result.put( key, source.get( key ) );
}
}
return result;
}
private void logConfiguration( Map<Object, Object> params, StringLogger logger, boolean dumpToConsole )
{
TreeSet<String> stringKeys = new TreeSet<String>();
for( Object key : params.keySet())
{
if (key instanceof String)
{
stringKeys.add((String)key);
}
}
for( String key : stringKeys )
{
Object value = params.get( key );
String mess = key + "=" + value;
if ( dumpToConsole )
{
System.out.println( mess );
}
logger.logMessage( mess );
}
}
private void cleanWriteLocksInLuceneDirectory( String luceneDir )
{
File dir = new File( luceneDir );
if ( !dir.isDirectory() )
{
return;
}
for ( File file : dir.listFiles() )
{
if ( file.isDirectory() )
{
cleanWriteLocksInLuceneDirectory( file.getAbsolutePath() );
}
else if ( file.getName().equals( "write.lock" ) )
{
boolean success = file.delete();
assert success;
}
}
}
private XaDataSource registerLuceneDataSource( String name,
String className, TxModule txModule, String luceneDirectory,
LockManager lockManager, byte[] resourceId,
Map<Object,Object> params )
{
params.put( "dir", luceneDirectory );
params.put( LockManager.class, lockManager );
return txModule.registerDataSource( name, className, resourceId,
params, true );
}
/**
* Returns true if Neo4j is started.
*
* @return True if Neo4j started
*/
public boolean started()
{
return started;
}
/**
* Shut down Neo4j.
*/
public synchronized void shutdown()
{
if ( started )
{
config.getGraphDbModule().stop();
config.getIdGeneratorModule().stop();
persistenceSource.stop();
config.getPersistenceModule().stop();
config.getTxModule().stop();
config.getGraphDbModule().destroy();
config.getIdGeneratorModule().destroy();
persistenceSource.destroy();
config.getPersistenceModule().destroy();
config.getTxModule().destroy();
}
started = false;
}
public Iterable<RelationshipType> getRelationshipTypes()
{
return config.getGraphDbModule().getRelationshipTypes();
}
public boolean transactionRunning()
{
try
{
return config.getTxModule().getTxManager().getTransaction() != null;
}
catch ( Exception e )
{
throw new TransactionFailureException(
"Unable to get transaction.", e );
}
}
public TransactionManager getTransactionManager()
{
return config.getTxModule().getTxManager();
}
}