io.netty.handler.codec.protobuf

Class ProtobufEncoderNano

java.lang.Object

io.netty.channel.ChannelHandlerAdapter

io.netty.channel.ChannelOutboundHandlerAdapter

io.netty.handler.codec.MessageToMessageEncoder<com.google.protobuf.nano.MessageNano>

io.netty.handler.codec.protobuf.ProtobufEncoderNano

All Implemented Interfaces:

io.netty.channel.ChannelHandler, io.netty.channel.ChannelOutboundHandler

@ChannelHandler.Sharable
public class ProtobufEncoderNano
extends io.netty.handler.codec.MessageToMessageEncoder<com.google.protobuf.nano.MessageNano>

Encodes the requested Google Protocol Buffers MessageNano 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("protobufDecoder",
                  new ProtobufDecoderNano(MyMessage.getDefaultInstance()));

 // Encoder
 pipeline.addLast("frameEncoder", new LengthFieldPrepender(4));
 pipeline.addLast("protobufEncoder", new ProtobufEncoderNano());
 

and then you can use a MyMessage instead of a ByteBuf as a message:

 void channelRead(ChannelHandlerContext ctx, Object msg) {
     MyMessage req = (MyMessage) msg;
     MyMessage res = MyMessage.newBuilder().setText(
                               "Did you say '" + req.getText() + "'?").build();
     ch.write(res);
 }
 

Nested Class Summary

Nested classes/interfaces inherited from interface io.netty.channel.ChannelHandler

io.netty.channel.ChannelHandler.Sharable

Constructor Summary

Constructors

Constructor and Description
ProtobufEncoderNano()

Method Summary

Modifier and Type	Method and Description
protected void	encode(io.netty.channel.ChannelHandlerContext ctx, com.google.protobuf.nano.MessageNano msg, List<Object> out)

Methods inherited from class io.netty.handler.codec.MessageToMessageEncoder

acceptOutboundMessage, write

Methods inherited from class io.netty.channel.ChannelOutboundHandlerAdapter

bind, close, connect, deregister, disconnect, flush, read

Methods inherited from class io.netty.channel.ChannelHandlerAdapter

ensureNotSharable, exceptionCaught, handlerAdded, handlerRemoved, isSharable

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Methods inherited from interface io.netty.channel.ChannelHandler

exceptionCaught, handlerAdded, handlerRemoved

Constructor Detail

ProtobufEncoderNano

public ProtobufEncoderNano()

Method Detail

encode

protected void encode(io.netty.channel.ChannelHandlerContext ctx,
                      com.google.protobuf.nano.MessageNano msg,
                      List<Object> out)
               throws Exception

Specified by:

encode in class io.netty.handler.codec.MessageToMessageEncoder<com.google.protobuf.nano.MessageNano>

Throws:

Exception