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/**
* Copyright (c) 2004 - 2010 Eike Stepper (Berlin, 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.internal.net4j;
import org.eclipse.emf.cdo.common.branch.CDOBranch;
import org.eclipse.emf.cdo.common.branch.CDOBranchPoint;
import org.eclipse.emf.cdo.net4j.FailoverCDOSessionConfiguration;
import org.eclipse.emf.cdo.session.CDOSession.ExceptionHandler;
import org.eclipse.emf.cdo.spi.common.branch.CDOBranchUtil;
import org.eclipse.emf.cdo.transaction.CDOTransaction;
import org.eclipse.net4j.connector.IConnector;
import org.eclipse.net4j.signal.RequestWithConfirmation;
import org.eclipse.net4j.signal.SignalProtocol;
import org.eclipse.net4j.signal.failover.IFailOverStrategy;
import org.eclipse.net4j.util.WrappedException;
import org.eclipse.net4j.util.collection.Pair;
import org.eclipse.net4j.util.container.IManagedContainer;
import org.eclipse.net4j.util.container.IPluginContainer;
import org.eclipse.net4j.util.io.ExtendedDataInputStream;
import org.eclipse.net4j.util.io.ExtendedDataOutputStream;
import org.eclipse.emf.spi.cdo.CDOSessionProtocol;
import org.eclipse.emf.spi.cdo.InternalCDOSession;
import org.eclipse.emf.spi.cdo.InternalCDOView;
import java.util.ArrayList;
import java.util.List;
/**
* @author Eike Stepper
* @since 4.0
*/
public class FailoverCDOSessionConfigurationImpl extends CDONet4jSessionConfigurationImpl implements
FailoverCDOSessionConfiguration
{
private String monitorConnectorDescription;
private String repositoryGroup;
public FailoverCDOSessionConfigurationImpl(String monitorConnectorDescription, String repositoryGroup)
{
this.monitorConnectorDescription = monitorConnectorDescription;
this.repositoryGroup = repositoryGroup;
}
public String getMonitorConnectorDescription()
{
return monitorConnectorDescription;
}
public String getRepositoryGroup()
{
return repositoryGroup;
}
@Override
public void setRepositoryName(String repositoryName)
{
throw new UnsupportedOperationException();
}
@Override
public void setConnector(IConnector connector)
{
throw new UnsupportedOperationException();
}
@Override
public void setFailOverStrategy(IFailOverStrategy failOverStrategy)
{
throw new UnsupportedOperationException();
}
@Override
public void setExceptionHandler(ExceptionHandler exceptionHandler)
{
throw new UnsupportedOperationException();
}
public void superSetRepositoryName(String repositoryName)
{
super.setRepositoryName(repositoryName);
}
public void superSetConnector(IConnector connector)
{
super.setConnector(connector);
}
public void superSetFailOverStrategy(IFailOverStrategy failOverStrategy)
{
super.setFailOverStrategy(failOverStrategy);
}
public void superSetExceptionHandler(ExceptionHandler exceptionHandler)
{
super.setExceptionHandler(exceptionHandler);
}
@Override
public InternalCDOSession createSession()
{
return new FailoverCDOSessionImpl(this);
}
public void failover(FailoverCDOSessionImpl session)
{
try
{
List<Object> targets = getViewTargets(session);
setPassiveUpdateEnabled(session.options().isPassiveUpdateEnabled());
setPassiveUpdateMode(session.options().getPassiveUpdateMode());
Pair<String, String> info = queryRepositoryInfoFromMonitor();
IConnector connector = getConnector(info.getElement1());
String repositoryName = null;
superSetConnector(connector);
superSetRepositoryName(repositoryName);
initProtocol(session);
reregisterViews(session, targets);
reregisterRemoteSessions(session);
}
catch (RuntimeException ex)
{
session.deactivate();
throw ex;
}
catch (Error ex)
{
session.deactivate();
throw ex;
}
}
protected Pair<String, String> queryRepositoryInfoFromMonitor()
{
SignalProtocol<Object> protocol = new SignalProtocol<Object>("failover-client");
try
{
protocol.open(getConnector(monitorConnectorDescription));
return new RequestWithConfirmation<Pair<String, String>>(protocol, (short)1)
{
@Override
protected void requesting(ExtendedDataOutputStream out) throws Exception
{
out.writeString(repositoryGroup);
}
@Override
protected Pair<String, String> confirming(ExtendedDataInputStream in) throws Exception
{
String connectorDescription = in.readString();
String repositoryName = in.readString();
return new Pair<String, String>(connectorDescription, repositoryName);
}
}.send();
}
catch (Exception ex)
{
throw WrappedException.wrap(ex);
}
finally
{
protocol.close();
}
}
protected IConnector getConnector(String description)
{
return (IConnector)getContainer().getElement("org.eclipse.net4j.connectors", "tcp", description);
}
protected IManagedContainer getContainer()
{
return IPluginContainer.INSTANCE;
}
private List<Object> getViewTargets(FailoverCDOSessionImpl session)
{
List<Object> targets = new ArrayList<Object>();
for (InternalCDOView view : session.getViews())
{
if (view instanceof CDOTransaction)
{
CDOTransaction transaction = (CDOTransaction)view;
targets.add(transaction.getBranch());
}
else
{
targets.add(CDOBranchUtil.copyBranchPoint(view));
}
}
return targets;
}
private void reregisterViews(FailoverCDOSessionImpl session, List<Object> targets)
{
CDOSessionProtocol sessionProtocol = session.getSessionProtocol();
int viewID = 0;
for (Object target : targets)
{
if (target instanceof CDOBranchPoint)
{
CDOBranchPoint branchPoint = (CDOBranchPoint)target;
sessionProtocol.openView(++viewID, branchPoint, true);
}
else
{
CDOBranch branch = (CDOBranch)target;
sessionProtocol.openView(++viewID, branch.getHead(), false);
}
}
}
private void reregisterRemoteSessions(FailoverCDOSessionImpl session)
{
// TODO
}
}
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