All Implemented Interfaces:

ChannelHandler, ChannelOutboundHandler

@ChannelHandler.Sharable
public class ProtobufEncoder
extends MessageToMessageEncoder<com.google.protobuf.MessageLiteOrBuilder>

 ChannelPipeline pipeline = ...;
 // Decoders
 pipeline.addLast("frameDecoder",
 new LengthFieldBasedFrameDecoder(1048576, 0, 4, 0, 4));
 pipeline.addLast("protobufDecoder",
 new ProtobufDecoder(MyMessage.getDefaultInstance()));
 // Encoder
 pipeline.addLast("frameEncoder", new LengthFieldPrepender(4));
 pipeline.addLast("protobufEncoder", new ProtobufEncoder());
 

 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

    ChannelHandler.Sharable

• Constructor Summary

  Constructors

  Constructor and Description
  ProtobufEncoder ()

• Method Summary

  All Methods

  Modifier and Type	Method and Description
  protected void	encode (ChannelHandlerContext ctx, com.google.protobuf.MessageLiteOrBuilder msg, List<Object> out) Encode from one message to an other.

  • 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

  • ProtobufEncoder

    public ProtobufEncoder()

• Method Detail

  • encode

    protected void encode(ChannelHandlerContext ctx,
     com.google.protobuf.MessageLiteOrBuilder msg,
     List<Object> out)
     throws Exception 

    Description copied from class: MessageToMessageEncoder
    Encode from one message to an other. This method will be called for each written message that can be handled by this encoder.

    Specified by:

    encode in class MessageToMessageEncoder<com.google.protobuf.MessageLiteOrBuilder>

    Parameters:

    ctx - the ChannelHandlerContext which this MessageToMessageEncoder belongs to

    msg - the message to encode to an other one

    out - the List into which the encoded msg should be added needs to do some kind of aggregation

    Throws:

    Exception - is thrown if an error occurs