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AppendLogEntry.java
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AppendLogEntry.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.raft.outcome;
import java.io.IOException;
import java.util.Objects;
import org.neo4j.coreedge.raft.log.RaftLog;
import org.neo4j.coreedge.raft.log.RaftLogEntry;
public class AppendLogEntry implements LogCommand
{
public final long index;
public final RaftLogEntry entry;
public AppendLogEntry( long index, RaftLogEntry entry )
{
this.index = index;
this.entry = entry;
}
@Override
public void applyTo( RaftLog raftLog ) throws IOException
{
if ( index <= raftLog.appendIndex() )
{
throw new IllegalStateException( "Attempted to append over an existing entry at index " + index );
}
raftLog.append( entry );
}
@Override
public boolean equals( Object o )
{
if ( this == o )
{ return true; }
if ( o == null || getClass() != o.getClass() )
{ return false; }
AppendLogEntry that = (AppendLogEntry) o;
return index == that.index &&
Objects.equals( entry, that.entry );
}
@Override
public int hashCode()
{
return Objects.hash( index, entry );
}
@Override
public String toString()
{
return "AppendLogEntry{" +
"index=" + index +
", entry=" + entry +
'}';
}
}