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BackupClient.java
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BackupClient.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.backup;
import java.io.IOException;
import org.jboss.netty.buffer.ChannelBuffer;
import org.neo4j.com.Client;
import org.neo4j.com.ObjectSerializer;
import org.neo4j.com.Protocol;
import org.neo4j.com.ProtocolVersion;
import org.neo4j.com.RequestContext;
import org.neo4j.com.RequestType;
import org.neo4j.com.Response;
import org.neo4j.com.Serializer;
import org.neo4j.com.TargetCaller;
import org.neo4j.com.monitor.RequestMonitor;
import org.neo4j.com.storecopy.ResponseUnpacker;
import org.neo4j.com.storecopy.StoreWriter;
import org.neo4j.com.storecopy.ToNetworkStoreWriter;
import org.neo4j.kernel.impl.store.StoreId;
import org.neo4j.kernel.impl.transaction.log.ReadableClosablePositionAwareChannel;
import org.neo4j.kernel.impl.transaction.log.entry.LogEntryReader;
import org.neo4j.kernel.monitoring.ByteCounterMonitor;
import org.neo4j.kernel.monitoring.Monitors;
import org.neo4j.logging.LogProvider;
import static org.neo4j.backup.BackupServer.FRAME_LENGTH;
import static org.neo4j.backup.BackupServer.PROTOCOL_VERSION;
class BackupClient extends Client<TheBackupInterface> implements TheBackupInterface
{
static final long BIG_READ_TIMEOUT = 40 * 1000;
public BackupClient( String hostNameOrIp, int port, LogProvider logProvider, StoreId storeId, long timeout,
ResponseUnpacker unpacker, ByteCounterMonitor byteCounterMonitor, RequestMonitor requestMonitor,
LogEntryReader<ReadableClosablePositionAwareChannel> reader )
{
super( hostNameOrIp, port, logProvider, storeId, FRAME_LENGTH,
new ProtocolVersion( PROTOCOL_VERSION, ProtocolVersion.INTERNAL_PROTOCOL_VERSION ), timeout,
Client.DEFAULT_MAX_NUMBER_OF_CONCURRENT_CHANNELS_PER_CLIENT, FRAME_LENGTH, unpacker,
byteCounterMonitor, requestMonitor, reader );
}
@Override
public Response<Void> fullBackup( StoreWriter storeWriter, final boolean forensics )
{
return sendRequest( BackupRequestType.FULL_BACKUP, RequestContext.EMPTY, new Serializer()
{
@Override
public void write( ChannelBuffer buffer ) throws IOException
{
buffer.writeByte( forensics ? (byte) 1 : (byte) 0 );
}
}, new Protocol.FileStreamsDeserializer( storeWriter ) );
}
@Override
public Response<Void> incrementalBackup( RequestContext context )
{
return sendRequest( BackupRequestType.INCREMENTAL_BACKUP, context, Protocol.EMPTY_SERIALIZER,
Protocol.VOID_DESERIALIZER );
}
@Override
protected boolean shouldCheckStoreId( RequestType<TheBackupInterface> type )
{
return type != BackupRequestType.FULL_BACKUP;
}
public enum BackupRequestType implements RequestType<TheBackupInterface>
{
FULL_BACKUP( new TargetCaller<TheBackupInterface, Void>()
{
@Override
public Response<Void> call( TheBackupInterface master, RequestContext context,
ChannelBuffer input, ChannelBuffer target )
{
boolean forensics = input.readable() ? booleanOf( input.readByte() ) : false;
return master.fullBackup( new ToNetworkStoreWriter( target, new Monitors() ), forensics );
}
private boolean booleanOf( byte value )
{
switch ( value )
{
case 0: return false;
case 1: return true;
default: throw new IllegalArgumentException( "Invalid 'boolean' byte value " + value );
}
}
}, Protocol.VOID_SERIALIZER ),
INCREMENTAL_BACKUP( new TargetCaller<TheBackupInterface, Void>()
{
@Override
public Response<Void> call( TheBackupInterface master, RequestContext context,
ChannelBuffer input, ChannelBuffer target )
{
return master.incrementalBackup( context );
}
}, Protocol.VOID_SERIALIZER )
;
@SuppressWarnings( "rawtypes" )
private final TargetCaller masterCaller;
@SuppressWarnings( "rawtypes" )
private final ObjectSerializer serializer;
@SuppressWarnings( "rawtypes" )
BackupRequestType( TargetCaller masterCaller, ObjectSerializer serializer )
{
this.masterCaller = masterCaller;
this.serializer = serializer;
}
@Override
@SuppressWarnings( "rawtypes" )
public TargetCaller getTargetCaller()
{
return masterCaller;
}
@Override
@SuppressWarnings( "rawtypes" )
public ObjectSerializer getObjectSerializer()
{
return serializer;
}
@Override
public byte id()
{
return (byte) ordinal();
}
@Override
public boolean responseShouldBeUnpacked()
{
return false;
}
}
}