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InterceptingXaLogicalLog.java
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InterceptingXaLogicalLog.java
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/**
* Copyright (c) 2002-2011 "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 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
package org.neo4j.kernel.impl.transaction.xaframework;
import java.nio.channels.ReadableByteChannel;
import java.util.List;
import java.util.Map;
import org.neo4j.helpers.Pair;
import org.neo4j.kernel.impl.nioneo.xa.Command;
public class InterceptingXaLogicalLog extends XaLogicalLog
{
private final List<Pair<TransactionInterceptorProvider, Object>> providers;
private final XaDataSource ds;
InterceptingXaLogicalLog( String fileName, XaResourceManager xaRm,
XaCommandFactory cf, XaTransactionFactory xaTf,
Map<Object, Object> config, List<Pair<TransactionInterceptorProvider, Object>> providers )
{
super( fileName, xaRm, cf, xaTf, config );
this.providers = providers;
this.ds = xaRm.getDataSource();
}
@Override
protected LogDeserializer getLogDeserializer(
ReadableByteChannel byteChannel )
{
final TransactionInterceptor first = TransactionInterceptorProvider.resolveChain(
providers, ds );
LogDeserializer toReturn = new LogDeserializer( byteChannel )
{
@Override
protected void intercept( List<LogEntry> entries )
{
for ( LogEntry entry : entries )
{
if ( entry instanceof LogEntry.Command )
{
LogEntry.Command commandEntry = (LogEntry.Command) entry;
if ( commandEntry.getXaCommand() instanceof Command )
{
( (Command) commandEntry.getXaCommand() ).accept( first );
}
}
else if ( entry instanceof LogEntry.Start )
{
first.setStartEntry( (LogEntry.Start) entry );
}
else if ( entry instanceof LogEntry.Commit )
{
first.setCommitEntry( (LogEntry.Commit) entry );
}
}
first.complete();
}
};
return toReturn;
}
}