Class ByteArrayEncoder

java.lang.Object
io.netty.channel.ChannelHandlerAdapter
All Implemented Interfaces:
ChannelHandler, ChannelOutboundHandler
@Sharable public class ByteArrayEncoder extends MessageToMessageEncoder<byte[]>
Encodes the requested array of bytes into a ByteBuf. A typical setup for TCP/IP would be: 
ChannelPipeline pipeline = ...;
// Decoders
pipeline.addLast("frameDecoder",
 new LengthFieldBasedFrameDecoder(1048576, 0, 4, 0, 4));
pipeline.addLast("bytesDecoder",
 new ByteArrayDecoder());
// Encoder
pipeline.addLast("frameEncoder", new LengthFieldPrepender(4));
pipeline.addLast("bytesEncoder", new ByteArrayEncoder());
and then you can use an array of bytes instead of a ByteBuf as a message: 
void channelRead(ChannelHandlerContext ctx, byte[] bytes) {
 ...
}