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TruncateLogCommand.java
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TruncateLogCommand.java
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/*
* Copyright (c) 2002-2016 "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.coreedge.core.consensus.outcome;
import java.io.IOException;
import java.util.Objects;
import org.neo4j.coreedge.core.consensus.log.RaftLog;
import org.neo4j.coreedge.core.consensus.log.RaftLogEntry;
import org.neo4j.coreedge.core.consensus.log.segmented.InFlightMap;
import org.neo4j.logging.Log;
public class TruncateLogCommand implements RaftLogCommand
{
public final long fromIndex;
public TruncateLogCommand( long fromIndex )
{
this.fromIndex = fromIndex;
}
@Override
public void dispatch( Handler handler ) throws IOException
{
handler.truncate( fromIndex );
}
@Override
public void applyTo( RaftLog raftLog, Log log ) throws IOException
{
raftLog.truncate( fromIndex );
}
@Override
public void applyTo( InFlightMap<RaftLogEntry> inFlightMap, Log log ) throws IOException
{
log.debug( "Start truncating in-flight-map from index %d. Current map:%n%s", fromIndex, inFlightMap );
inFlightMap.truncate( fromIndex );
}
@Override
public boolean equals( Object o )
{
if ( this == o )
{ return true; }
if ( o == null || getClass() != o.getClass() )
{ return false; }
TruncateLogCommand that = (TruncateLogCommand) o;
return fromIndex == that.fromIndex;
}
@Override
public int hashCode()
{
return Objects.hash( fromIndex );
}
@Override
public String toString()
{
return "TruncateLogCommand{" +
"fromIndex=" + fromIndex +
'}';
}
}