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ChunkedReplicatedTransactionInput.java
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ChunkedReplicatedTransactionInput.java
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/*
* Copyright (c) 2002-2018 "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.causalclustering.core.state.machines.tx;
import io.netty.buffer.ByteBuf;
import io.netty.buffer.ByteBufAllocator;
import io.netty.buffer.EmptyByteBuf;
import io.netty.channel.ChannelHandlerContext;
import io.netty.handler.stream.ChunkedInput;
import io.netty.handler.stream.ChunkedStream;
import java.io.ByteArrayInputStream;
import java.io.IOException;
import org.neo4j.causalclustering.messaging.marshalling.ReplicatedContentChunk;
import org.neo4j.causalclustering.messaging.marshalling.v2.SerializableContent;
import org.neo4j.storageengine.api.WritableChannel;
public class ChunkedReplicatedTransactionInput implements SerializableContent, ChunkedInput<ReplicatedContentChunk>
{
private final ChunkedStream chunkedStream;
private final byte txContentType;
private final ReplicatedTransaction replicatedTransaction;
public ChunkedReplicatedTransactionInput( byte txContentType, ReplicatedTransaction replicatedTransaction, int chunkSize )
{
if ( chunkSize < 4 )
{
throw new IllegalArgumentException( "Chunk size must be at least 4 bytes" );
}
this.txContentType = txContentType;
this.replicatedTransaction = replicatedTransaction;
chunkedStream = new ChunkedStream( new ByteArrayInputStream( replicatedTransaction.getTxBytes() ), chunkSize - 3 );
}
public ChunkedReplicatedTransactionInput( byte txContentType, ReplicatedTransaction replicatedTransaction )
{
this.txContentType = txContentType;
this.replicatedTransaction = replicatedTransaction;
chunkedStream = new ChunkedStream( new ByteArrayInputStream( replicatedTransaction.getTxBytes() ) );
}
@Override
public void serialize( WritableChannel channel ) throws IOException
{
channel.put( txContentType );
ReplicatedTransactionSerializer.marshal( replicatedTransaction, channel );
}
@Override
public boolean isEndOfInput() throws Exception
{
return chunkedStream.isEndOfInput();
}
@Override
public void close() throws Exception
{
chunkedStream.close();
}
@Override
public ReplicatedContentChunk readChunk( ChannelHandlerContext ctx ) throws Exception
{
return readChunk( ctx.alloc() );
}
@Override
public ReplicatedContentChunk readChunk( ByteBufAllocator allocator ) throws Exception
{
boolean isFirst = progress() == 0;
ByteBuf byteBuf = chunkedStream.readChunk( allocator );
if ( byteBuf == null )
{
byteBuf = new EmptyByteBuf( allocator );
}
return new ReplicatedContentChunk( txContentType, isFirst, isEndOfInput(), byteBuf );
}
@Override
public long length()
{
return -1;
}
@Override
public long progress()
{
return chunkedStream.progress();
}
}