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/***************************************************************************
* Copyright (c) 2004 - 2008 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:
* Simon McDuff - initial API and implementation
**************************************************************************/
package org.eclipse.emf.internal.cdo.protocol;
import org.eclipse.emf.cdo.common.id.CDOID;
import org.eclipse.emf.cdo.common.id.CDOIDUtil;
import org.eclipse.emf.cdo.common.io.CDODataInput;
import org.eclipse.emf.cdo.common.io.CDODataOutput;
import org.eclipse.emf.cdo.common.protocol.CDOProtocolConstants;
import org.eclipse.emf.cdo.internal.common.id.CDOIDExternalTempImpl;
import org.eclipse.emf.cdo.util.CDOURIUtil;
import org.eclipse.emf.internal.cdo.CDOXATransactionCommitContext;
import org.eclipse.emf.internal.cdo.InternalCDOTransaction;
import org.eclipse.emf.internal.cdo.bundle.OM;
import org.eclipse.net4j.util.om.monitor.OMMonitor;
import org.eclipse.net4j.util.om.trace.ContextTracer;
import org.eclipse.emf.common.util.URI;
import java.io.IOException;
import java.util.Map;
import java.util.Map.Entry;
/**
* <p>
* Phase 2 consist of sending the mapping of temporary/persistent CDOID from other CDOTransaction.
* <p>
* It will return confirmation only when the commit is ready to flush to disk.
*
* @author Simon McDuff
*/
public class CommitTransactionPhase2Request extends CommitTransactionRequest
{
private static final ContextTracer PROTOCOL = new ContextTracer(OM.DEBUG_PROTOCOL,
CommitTransactionPhase1Request.class);
public CommitTransactionPhase2Request(CDOClientProtocol protocol, CDOXATransactionCommitContext xaContext)
{
super(protocol, CDOProtocolConstants.SIGNAL_COMMIT_TRANSACTION_PHASE2, xaContext);
}
@Override
protected CDOXATransactionCommitContext getCommitContext()
{
return (CDOXATransactionCommitContext)super.getCommitContext();
}
@Override
protected void requesting(CDODataOutput out, OMMonitor monitor) throws IOException
{
requestingTransactionInfo(out);
requestingIdMapping(out);
}
@Override
protected CommitTransactionResult confirming(CDODataInput in, OMMonitor monitor) throws IOException
{
return confirmingCheckError(in);
}
/**
* Write ids that are needed. only If it needs to
*/
protected void requestingIdMapping(CDODataOutput out) throws IOException
{
CDOXATransactionCommitContext context = getCommitContext();
Map<CDOIDExternalTempImpl, InternalCDOTransaction> requestedIDs = context.getRequestedIDs();
int size = requestedIDs.size();
out.writeInt(size);
if (PROTOCOL.isEnabled())
{
PROTOCOL.format("Number of ids requested: {0}", size);
}
for (Entry<CDOIDExternalTempImpl, InternalCDOTransaction> entry : requestedIDs.entrySet())
{
CDOIDExternalTempImpl tempID = entry.getKey();
URI oldURIExternal = URI.createURI(tempID.toURIFragment());
CDOID oldCDOID = CDOIDUtil.read(oldURIExternal.fragment(), null);
CDOXATransactionCommitContext commitContext = context.getTransactionManager().getCommitContext(entry.getValue());
if (commitContext == null)
{
throw new IllegalStateException("Missing informations. " + entry.getValue() + " isn't involved in the commit.");
}
CDOID newID = commitContext.getResult().getIDMappings().get(oldCDOID);
if (newID == null)
{
throw new IllegalStateException("Missing informations. " + oldCDOID.toURIFragment()
+ " isn't mapped in the commit.");
}
CDOID newIDExternal = CDOURIUtil.convertExternalCDOID(oldURIExternal, newID);
if (PROTOCOL.isEnabled())
{
PROTOCOL.format("ID mapping: {0} --> {1}", tempID.toURIFragment(), newIDExternal.toURIFragment());
}
out.writeCDOID(tempID);
out.writeCDOID(newIDExternal);
context.getResult().addIDMapping(tempID, newIDExternal);
}
}
}
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