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BatchAppendLogEntries.java
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BatchAppendLogEntries.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.Arrays;
import java.util.Objects;
import org.neo4j.coreedge.raft.log.RaftLog;
import org.neo4j.coreedge.raft.log.RaftLogEntry;
import static java.lang.String.format;
public class BatchAppendLogEntries implements LogCommand
{
public final long baseIndex;
public final int offset;
public final RaftLogEntry[] entries;
public BatchAppendLogEntries( long baseIndex, int offset, RaftLogEntry[] entries )
{
this.baseIndex = baseIndex;
this.offset = offset;
this.entries = entries;
}
@Override
public void applyTo( RaftLog raftLog ) throws IOException
{
long lastIndex = baseIndex + offset;
if ( lastIndex <= raftLog.appendIndex() )
{
throw new IllegalStateException( "Attempted to append over an existing entry starting at index " + lastIndex );
}
for ( int i = offset; i < entries.length; i++ )
{
raftLog.append( entries[i] );
}
}
@Override
public boolean equals( Object o )
{
if ( this == o )
{ return true; }
if ( o == null || getClass() != o.getClass() )
{ return false; }
BatchAppendLogEntries that = (BatchAppendLogEntries) o;
return baseIndex == that.baseIndex &&
offset == that.offset &&
Arrays.equals( entries, that.entries );
}
@Override
public int hashCode()
{
return Objects.hash( baseIndex, offset, entries );
}
@Override
public String toString()
{
return format( "BatchAppendLogEntries{baseIndex=%d, offset=%d, entries=%s}", baseIndex, offset, Arrays.toString( entries ) );
}
}