/**
* Copyright (c) 2002-2010 "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 Affero 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 Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
package org.neo4j.onlinebackup.ha;
import java.nio.channels.ReadableByteChannel;
import org.neo4j.kernel.impl.transaction.xaframework.XaDataSource;
public class LogApplier extends Thread
{
private volatile boolean run = true;
private final XaDataSource[] xaDataSources;
LogApplier( XaDataSource[] xaDataSources )
{
this.xaDataSources = xaDataSources;
}
public void run()
{
try
{
while ( run )
{
for ( XaDataSource xaDs : xaDataSources )
{
long logVersion = xaDs.getCurrentLogVersion();
if ( xaDs.hasLogicalLog( logVersion ) )
{
ReadableByteChannel logChannel =
xaDs.getLogicalLog( logVersion );
xaDs.applyLog( logChannel );
}
else
{
synchronized ( this )
{
try
{
this.wait( 250 );
}
catch ( InterruptedException e )
{
interrupted();
}
}
}
}
}
}
catch ( Exception e )
{
System.err.println( "Failed to apply log: " + e );
e.printStackTrace();
}
finally
{
run = false;
}
}
public void stopApplyLogs()
{
run = false;
}
}