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ClientMessageTypeHandler.java
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ClientMessageTypeHandler.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.catchup;
import io.netty.buffer.ByteBuf;
import io.netty.channel.ChannelHandlerContext;
import io.netty.channel.ChannelInboundHandlerAdapter;
import io.netty.util.ReferenceCountUtil;
import org.neo4j.logging.Log;
import org.neo4j.logging.LogProvider;
import static org.neo4j.coreedge.catchup.ResponseMessageType.from;
public class ClientMessageTypeHandler extends ChannelInboundHandlerAdapter
{
private final Log log;
private final CatchupClientProtocol protocol;
public ClientMessageTypeHandler( CatchupClientProtocol protocol, LogProvider logProvider )
{
this.protocol = protocol;
this.log = logProvider.getLog( getClass() );
}
@Override
public void channelRead( ChannelHandlerContext ctx, Object msg ) throws Exception
{
if ( protocol.isExpecting( CatchupClientProtocol.State.MESSAGE_TYPE ) )
{
ByteBuf buffer = (ByteBuf) msg;
byte version = buffer.readByte();
byte messageType = buffer.readByte();
ResponseMessageType responseMessageType = from( version, messageType );
switch ( responseMessageType )
{
case STORE_ID:
protocol.expect( CatchupClientProtocol.State.STORE_ID );
break;
case TX:
protocol.expect( CatchupClientProtocol.State.TX_PULL_RESPONSE );
break;
case FILE:
protocol.expect( CatchupClientProtocol.State.FILE_HEADER );
break;
case STORE_COPY_FINISHED:
protocol.expect( CatchupClientProtocol.State.STORE_COPY_FINISHED );
break;
case CORE_SNAPSHOT:
protocol.expect( CatchupClientProtocol.State.CORE_SNAPSHOT );
break;
case TX_STREAM_FINISHED:
protocol.expect( CatchupClientProtocol.State.TX_STREAM_FINISHED );
break;
default:
log.warn( "No handler found for version %d and message type %s", version, responseMessageType );
}
ReferenceCountUtil.release( msg );
}
else
{
ctx.fireChannelRead( msg );
}
}
}