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Chunker.java
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Chunker.java
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/*
* Copyright (c) 2002-2017 "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 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
package org.neo4j.bolt.v1.transport.socket;
import io.netty.buffer.ByteBuf;
import io.netty.buffer.UnpooledByteBufAllocator;
import io.netty.channel.Channel;
import io.netty.channel.ChannelPromise;
import org.mockito.invocation.InvocationOnMock;
import org.mockito.stubbing.Answer;
import java.io.IOException;
import java.nio.ByteBuffer;
import org.neo4j.bolt.v1.transport.ChunkedOutput;
import static org.mockito.Matchers.any;
import static org.mockito.Mockito.mock;
import static org.mockito.Mockito.when;
/** Helper to chunk up serialized data for testing */
public class Chunker
{
private Chunker()
{
}
public static byte[] chunk( int maxChunkSize, byte[][] messages ) throws IOException
{
final ByteBuffer outputBuffer = ByteBuffer.allocate( 1024 * 8 );
Channel ch = mock( Channel.class );
when( ch.alloc() ).thenReturn( UnpooledByteBufAllocator.DEFAULT );
when( ch.writeAndFlush( any(), any( ChannelPromise.class ) ) ).then( inv ->
{
ByteBuf buf = (ByteBuf) inv.getArguments()[0];
outputBuffer.limit( outputBuffer.position() + buf.readableBytes() );
buf.readBytes( outputBuffer );
buf.release();
return null;
} );
ChunkedOutput out = new ChunkedOutput( ch, maxChunkSize + 2 /* for chunk header */ );
for ( byte[] message : messages )
{
out.writeBytes( message, 0, message.length );
out.onMessageComplete();
}
out.flush();
out.close();
byte[] bytes = new byte[outputBuffer.limit()];
outputBuffer.position( 0 );
outputBuffer.get( bytes );
return bytes;
}
}