io.netty.handler.codec.protobuf

Class ProtobufVarint32LengthFieldPrepender

java.lang.Object

io.netty.channel.ChannelHandlerAdapter

io.netty.channel.ChannelOutboundHandlerAdapter

io.netty.handler.codec.MessageToByteEncoder<io.netty.buffer.ByteBuf>

io.netty.handler.codec.protobuf.ProtobufVarint32LengthFieldPrepender

All Implemented Interfaces:

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

@ChannelHandler.Sharable
public class ProtobufVarint32LengthFieldPrepender
extends io.netty.handler.codec.MessageToByteEncoder<io.netty.buffer.ByteBuf>

An encoder that prepends the Google Protocol Buffers Base 128 Varints integer length field. For example:

 BEFORE ENCODE (300 bytes)       AFTER ENCODE (302 bytes)
 +---------------+               +--------+---------------+
 | Protobuf Data |-------------->| Length | Protobuf Data |
 |  (300 bytes)  |               | 0xAC02 |  (300 bytes)  |
 +---------------+               +--------+---------------+
 

*

See Also:

CodedOutputStream, CodedOutputByteBufferNano

Nested Class Summary

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

io.netty.channel.ChannelHandler.Sharable

Constructor Summary

Constructors

Constructor and Description
ProtobufVarint32LengthFieldPrepender()

Method Summary

Modifier and Type	Method and Description
protected void	encode(io.netty.channel.ChannelHandlerContext ctx, io.netty.buffer.ByteBuf msg, io.netty.buffer.ByteBuf out)

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

acceptOutboundMessage, allocateBuffer, isPreferDirect, 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

ProtobufVarint32LengthFieldPrepender

public ProtobufVarint32LengthFieldPrepender()

Method Detail

encode

protected void encode(io.netty.channel.ChannelHandlerContext ctx,
                      io.netty.buffer.ByteBuf msg,
                      io.netty.buffer.ByteBuf out)
               throws Exception

Specified by:

encode in class io.netty.handler.codec.MessageToByteEncoder<io.netty.buffer.ByteBuf>

Throws:

Exception