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LoggingLogFileMonitor.java
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LoggingLogFileMonitor.java
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/*
* Copyright (c) 2002-2017 "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.log;
import java.io.File;
import org.neo4j.kernel.impl.transaction.log.rotation.LogRotation;
import org.neo4j.kernel.recovery.Recovery;
import org.neo4j.kernel.recovery.PositionToRecoverFrom;
import org.neo4j.logging.Log;
import static java.lang.String.format;
public class LoggingLogFileMonitor implements
PhysicalLogFile.Monitor,
LogRotation.Monitor,
Recovery.Monitor,
PositionToRecoverFrom.Monitor
{
private long firstTransactionRecovered = -1, lastTransactionRecovered;
private final Log log;
public LoggingLogFileMonitor( Log log )
{
this.log = log;
}
@Override
public void recoveryRequired( LogPosition startPosition )
{
log.info( "Recovery required from position " + startPosition );
}
@Override
public void recoveryCompleted( int numberOfRecoveredTransactions )
{
if ( numberOfRecoveredTransactions != 0 )
{
log.info( format( "Recovery completed. %d transactions, first:%d, last:%d recovered",
numberOfRecoveredTransactions, firstTransactionRecovered, lastTransactionRecovered ) );
}
else
{
log.info( "No recovery required" );
}
}
@Override
public void startedRotating( long currentVersion )
{
log.info( format( "Rotating log version:%d", currentVersion ) );
}
@Override
public void finishedRotating( long currentVersion )
{
log.info( format( "Finished rotating log version:%d", currentVersion ) );
}
@Override
public void transactionRecovered( long txId )
{
if ( firstTransactionRecovered == -1 )
{
firstTransactionRecovered = txId;
}
lastTransactionRecovered = txId;
}
@Override
public void opened( File logFile, long logVersion, long lastTransactionId, boolean clean )
{
log.info( format( "Opened logical log [%s] version=%d, lastTxId=%d (%s)",
logFile, logVersion, lastTransactionId, (clean ? "clean" : "recovered") ) );
}
@Override
public void noCommitsAfterLastCheckPoint( LogPosition logPosition )
{
log.info( format( "No commits found after last check point (which is at %s)",
logPosition != null ? logPosition.toString() : "<no log position given>" ) );
}
@Override
public void commitsAfterLastCheckPoint( LogPosition logPosition, long firstTxIdAfterLastCheckPoint )
{
log.info( format(
"Commits found after last check point (which is at %s). First txId after last checkpoint: %d ",
logPosition, firstTxIdAfterLastCheckPoint ) );
}
@Override
public void noCheckPointFound()
{
log.info( "No check point found in transaction log" );
}
}