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/***************************************************************************
* Copyright (c) 2004 - 2007 Eike Stepper, Germany.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* Contributors:
* Eike Stepper - initial API and implementation
**************************************************************************/
package org.eclipse.emf.internal.cdo;
import org.eclipse.emf.cdo.CDORevisionManager;
import org.eclipse.emf.cdo.internal.protocol.revision.CDORevisionImpl;
import org.eclipse.emf.cdo.internal.protocol.revision.CDORevisionResolverImpl;
import org.eclipse.emf.cdo.internal.protocol.revision.CDORevisionImpl.MoveableList;
import org.eclipse.emf.cdo.protocol.CDOID;
import org.eclipse.emf.cdo.protocol.model.CDOFeature;
import org.eclipse.emf.cdo.protocol.revision.CDOReferenceProxy;
import org.eclipse.emf.cdo.protocol.util.TransportException;
import org.eclipse.net4j.IChannel;
import org.eclipse.net4j.signal.IFailOverStrategy;
import org.eclipse.emf.internal.cdo.protocol.LoadChunkRequest;
import org.eclipse.emf.internal.cdo.protocol.LoadRevisionRequest;
/**
* @author Eike Stepper
*/
public class CDORevisionManagerImpl extends CDORevisionResolverImpl implements CDORevisionManager
{
private CDOSessionImpl session;
public CDORevisionManagerImpl(CDOSessionImpl session)
{
this.session = session;
}
public CDOSessionImpl getSession()
{
return session;
}
public CDOID resolveReferenceProxy(CDOReferenceProxy referenceProxy)
{
CDORevisionImpl revision = (CDORevisionImpl)referenceProxy.getRevision();
CDOFeature feature = referenceProxy.getFeature();
int index = referenceProxy.getIndex();
int chunkSize = session.getReferenceChunkSize();
MoveableList list = revision.getList(feature);
int minIndex = Math.max(0, index - chunkSize / 2);
int fromIndex = index;
while (fromIndex > minIndex && list.get(fromIndex) instanceof CDOReferenceProxy)
{
--fromIndex;
}
int maxIndex = Math.min(list.size() - 1, index + chunkSize / 2);
int toIndex = index;
while (toIndex < maxIndex && list.get(toIndex) instanceof CDOReferenceProxy)
{
++toIndex;
}
try
{
CDOID result = null;
IFailOverStrategy failOverStrategy = session.getFailOverStrategy();
IChannel channel = session.getChannel();
LoadChunkRequest request = new LoadChunkRequest(channel, revision.getID(), feature, fromIndex, toIndex);
CDOID[] ids = failOverStrategy.send(request);
for (int i = 0; i < ids.length; i++)
{
CDOID id = ids[i];
int j = fromIndex + i;
list.set(j, id);
if (j == index)
{
result = id;
}
}
return result;
}
catch (RuntimeException ex)
{
throw ex;
}
catch (Exception ex)
{
throw new TransportException(ex);
}
}
@Override
protected CDORevisionImpl loadRevision(CDOID id, int referenceChunk)
{
try
{
IFailOverStrategy failOverStrategy = session.getFailOverStrategy();
IChannel channel = session.getChannel();
LoadRevisionRequest request = new LoadRevisionRequest(channel, id, referenceChunk);
return failOverStrategy.send(request);
}
catch (RuntimeException ex)
{
throw ex;
}
catch (Exception ex)
{
throw new TransportException(ex);
}
}
@Override
protected CDORevisionImpl loadRevision(CDOID id, int referenceChunk, long timeStamp)
{
try
{
IFailOverStrategy failOverStrategy = session.getFailOverStrategy();
IChannel channel = session.getChannel();
LoadRevisionRequest request = new LoadRevisionRequest(channel, id, referenceChunk, timeStamp);
return failOverStrategy.send(request);
}
catch (RuntimeException ex)
{
throw ex;
}
catch (Exception ex)
{
throw new TransportException(ex);
}
}
}
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