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/*
* Copyright (c) 2016, 2017 Eike Stepper (Loehne, Germany) and others.
* 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.cdo.server.internal.net4j.protocol;
import org.eclipse.emf.cdo.common.id.CDOID;
import org.eclipse.emf.cdo.common.protocol.CDODataInput;
import org.eclipse.emf.cdo.common.protocol.CDODataOutput;
import org.eclipse.emf.cdo.common.protocol.CDOProtocolConstants;
import org.eclipse.emf.cdo.common.protocol.CDOProtocolConstants.UnitOpcode;
import org.eclipse.emf.cdo.common.revision.CDORevision;
import org.eclipse.emf.cdo.common.revision.CDORevisionCache;
import org.eclipse.emf.cdo.common.revision.CDORevisionHandler;
import org.eclipse.emf.cdo.server.IUnit;
import org.eclipse.emf.cdo.server.IUnitManager;
import org.eclipse.emf.cdo.spi.server.InternalRepository;
import org.eclipse.emf.cdo.spi.server.InternalView;
import org.eclipse.net4j.util.om.monitor.OMMonitor;
import org.eclipse.net4j.util.om.monitor.OMMonitor.Async;
import java.io.IOException;
/**
* @author Eike Stepper
*/
public class UnitIndication extends CDOServerReadIndicationWithMonitoring
{
private int viewID;
private CDOID rootID;
private UnitOpcode opcode;
public UnitIndication(CDOServerProtocol protocol)
{
super(protocol, CDOProtocolConstants.SIGNAL_UNIT);
}
@Override
protected int getIndicatingWorkPercent()
{
return 1;
}
@Override
protected void indicating(CDODataInput in, OMMonitor monitor) throws Exception
{
viewID = in.readXInt();
rootID = in.readCDOID();
opcode = UnitOpcode.values()[in.readByte()];
}
@Override
protected void responding(final CDODataOutput out, OMMonitor monitor) throws Exception
{
final InternalView view = getView(viewID);
final InternalRepository repository = getRepository();
if (opcode == UnitOpcode.CHECK)
{
IUnitManager unitManager = repository.getUnitManager();
boolean isUnit = unitManager.isUnit(rootID);
out.writeBoolean(isUnit);
return;
}
if (opcode == UnitOpcode.CLOSE)
{
IUnitManager unitManager = repository.getUnitManager();
IUnit unit = unitManager.getUnit(rootID);
if (unit != null)
{
unit.close(view);
out.writeBoolean(true);
return;
}
out.writeBoolean(false);
return;
}
final CDORevisionCache revisionCache = repository.getRevisionManager().getCache();
final IOException[] ioException = { null };
final RuntimeException[] runtimeException = { null };
monitor.begin();
Async async = monitor.forkAsync();
try
{
boolean success = view.openUnit(rootID, opcode, new CDORevisionHandler()
{
public boolean handleRevision(CDORevision revision)
{
try
{
view.unsubscribe(revision.getID());
revisionCache.addRevision(revision);
out.writeCDORevision(revision, CDORevision.UNCHUNKED); // Exposes revision to client side
return true;
}
catch (IOException ex)
{
ioException[0] = ex;
}
catch (RuntimeException ex)
{
runtimeException[0] = ex;
}
return false;
}
}, monitor);
if (ioException[0] != null)
{
throw ioException[0];
}
if (runtimeException[0] != null)
{
throw runtimeException[0];
}
out.writeCDORevision(null, CDORevision.UNCHUNKED); // No more revisions
out.writeBoolean(success);
}
finally
{
async.stop();
monitor.done();
}
}
}
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