/**
* Copyright (c) 2002-2010 "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.kernel.impl.core;
import java.util.Arrays;
import java.util.Map;
import java.util.logging.Logger;
import javax.transaction.HeuristicMixedException;
import javax.transaction.HeuristicRollbackException;
import javax.transaction.NotSupportedException;
import javax.transaction.RollbackException;
import javax.transaction.SystemException;
import javax.transaction.TransactionManager;
import org.neo4j.graphdb.GraphDatabaseService;
import org.neo4j.graphdb.Node;
import org.neo4j.graphdb.NotFoundException;
import org.neo4j.graphdb.RelationshipType;
import org.neo4j.graphdb.TransactionFailureException;
import org.neo4j.kernel.Config;
import org.neo4j.kernel.impl.cache.AdaptiveCacheManager;
import org.neo4j.kernel.impl.core.NodeManager.CacheType;
import org.neo4j.kernel.impl.nioneo.store.PropertyIndexData;
import org.neo4j.kernel.impl.nioneo.store.RelationshipTypeData;
import org.neo4j.kernel.impl.persistence.IdGenerator;
import org.neo4j.kernel.impl.persistence.PersistenceManager;
import org.neo4j.kernel.impl.transaction.LockManager;
public class GraphDbModule
{
private static final CacheType DEFAULT_CACHE_TYPE = CacheType.weak;
private static Logger log = Logger.getLogger( GraphDbModule.class.getName() );
private boolean startIsOk = true;
private static final int INDEX_COUNT = 2500;
private final GraphDatabaseService graphDbService;
private final TransactionManager transactionManager;
private final AdaptiveCacheManager cacheManager;
private final LockManager lockManager;
private final IdGenerator idGenerator;
private NodeManager nodeManager;
private boolean readOnly = false;
public GraphDbModule( GraphDatabaseService graphDb,
AdaptiveCacheManager cacheManager, LockManager lockManager,
TransactionManager transactionManager, IdGenerator idGenerator,
boolean readOnly )
{
this.graphDbService = graphDb;
this.cacheManager = cacheManager;
this.lockManager = lockManager;
this.transactionManager = transactionManager;
this.idGenerator = idGenerator;
this.readOnly = readOnly;
}
public void init()
{
}
public void start( LockReleaser lockReleaser,
PersistenceManager persistenceManager, Map<Object,Object> params )
{
if ( !startIsOk )
{
return;
}
String cacheTypeName = (String) params.get( Config.CACHE_TYPE );
CacheType cacheType = null;
try
{
cacheType = cacheTypeName != null ? CacheType.valueOf( cacheTypeName ) : DEFAULT_CACHE_TYPE;
}
catch ( IllegalArgumentException e )
{
throw new IllegalArgumentException( "Invalid cache type, please use one of: " +
Arrays.asList( CacheType.values() ) + " or keep empty for default (" +
DEFAULT_CACHE_TYPE + ")", e.getCause() );
}
if ( !readOnly )
{
nodeManager = new NodeManager( graphDbService, cacheManager,
lockManager, lockReleaser, transactionManager,
persistenceManager, idGenerator, cacheType );
}
else
{
nodeManager = new ReadOnlyNodeManager( graphDbService,
cacheManager, lockManager, lockReleaser,
transactionManager, persistenceManager, idGenerator, cacheType );
}
// load and verify from PS
RelationshipTypeData relTypes[] = null;
PropertyIndexData propertyIndexes[] = null;
beginTx();
relTypes = persistenceManager.loadAllRelationshipTypes();
propertyIndexes = persistenceManager.loadPropertyIndexes(
INDEX_COUNT );
commitTx();
nodeManager.addRawRelationshipTypes( relTypes );
nodeManager.addPropertyIndexes( propertyIndexes );
if ( propertyIndexes.length < INDEX_COUNT )
{
nodeManager.setHasAllpropertyIndexes( true );
}
nodeManager.start( params );
startIsOk = false;
}
private void beginTx()
{
try
{
transactionManager.begin();
}
catch ( NotSupportedException e )
{
throw new TransactionFailureException(
"Unable to begin transaction.", e );
}
catch ( SystemException e )
{
throw new TransactionFailureException(
"Unable to begin transaction.", e );
}
}
private void commitTx()
{
try
{
transactionManager.commit();
}
catch ( SecurityException e )
{
throw new TransactionFailureException( "Failed to commit.", e );
}
catch ( IllegalStateException e )
{
throw new TransactionFailureException( "Failed to commit.", e );
}
catch ( RollbackException e )
{
throw new TransactionFailureException( "Failed to commit.", e );
}
catch ( HeuristicMixedException e )
{
throw new TransactionFailureException( "Failed to commit.", e );
}
catch ( HeuristicRollbackException e )
{
throw new TransactionFailureException( "Failed to commit.", e );
}
catch ( SystemException e )
{
throw new TransactionFailureException( "Failed to commit.", e );
}
}
public void setReferenceNodeId( Integer nodeId )
{
nodeManager.setReferenceNodeId( nodeId.intValue() );
try
{
nodeManager.getReferenceNode();
}
catch ( NotFoundException e )
{
log.warning( "Reference node[" + nodeId + "] not valid." );
}
}
public Integer getCurrentReferenceNodeId()
{
try
{
return (int) nodeManager.getReferenceNode().getId();
}
catch ( NotFoundException e )
{
return -1;
}
}
public void createNewReferenceNode()
{
Node node = nodeManager.createNode();
nodeManager.setReferenceNodeId( (int) node.getId() );
}
public void reload( Map<Object,Object> params )
{
throw new UnsupportedOperationException();
}
public void stop()
{
nodeManager.clearPropertyIndexes();
nodeManager.clearCache();
nodeManager.stop();
}
public void destroy()
{
}
public NodeManager getNodeManager()
{
return this.nodeManager;
}
public Iterable<RelationshipType> getRelationshipTypes()
{
return nodeManager.getRelationshipTypes();
}
}