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ToNetworkStoreWriter.java
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ToNetworkStoreWriter.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.com.storecopy;
import org.jboss.netty.buffer.ChannelBuffer;
import java.io.IOException;
import java.nio.ByteBuffer;
import java.nio.channels.ReadableByteChannel;
import org.neo4j.com.BlockLogBuffer;
import org.neo4j.com.Protocol;
import org.neo4j.kernel.monitoring.ByteCounterMonitor;
import org.neo4j.kernel.monitoring.Monitors;
public class ToNetworkStoreWriter implements StoreWriter
{
public static final String STORE_COPIER_MONITOR_TAG = "storeCopier";
private final ChannelBuffer targetBuffer;
private final ByteCounterMonitor bufferMonitor;
public ToNetworkStoreWriter( ChannelBuffer targetBuffer, Monitors monitors )
{
this.targetBuffer = targetBuffer;
bufferMonitor = monitors.newMonitor( ByteCounterMonitor.class, getClass(), STORE_COPIER_MONITOR_TAG );
}
@Override
public long write( String path, ReadableByteChannel data, ByteBuffer temporaryBuffer,
boolean hasData, int requiredElementAlignment ) throws IOException
{
char[] chars = path.toCharArray();
targetBuffer.writeShort( chars.length );
Protocol.writeChars( targetBuffer, chars );
targetBuffer.writeByte( hasData ? 1 : 0 );
// TODO Make use of temporaryBuffer?
BlockLogBuffer buffer = new BlockLogBuffer( targetBuffer, bufferMonitor );
long totalWritten = Short.BYTES + chars.length* Character.BYTES + Byte.BYTES;
if ( hasData )
{
targetBuffer.writeInt( requiredElementAlignment );
totalWritten += Integer.BYTES;
totalWritten += buffer.write( data );
buffer.close();
}
return totalWritten;
}
@Override
public void close()
{
targetBuffer.writeShort( 0 );
}
}