Class ByteArrayDecoder

java.lang.Object

io.netty.channel.ChannelHandlerAdapter

io.netty.channel.ChannelInboundHandlerAdapter

io.netty.handler.codec.MessageToMessageDecoder<ByteBuf>

io.netty.handler.codec.bytes.ByteArrayDecoder

All Implemented Interfaces:

ChannelHandler, ChannelInboundHandler

public class ByteArrayDecoder
extends MessageToMessageDecoder<ByteBuf>

Decodes a received ByteBuf into an array of bytes. 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) {
    ...
}

Nested Class Summary

Nested classes/interfaces inherited from interface ChannelHandler

ChannelHandler.Sharable

Constructor Summary

Constructors

Constructor	Description
ByteArrayDecoder()

Method Summary

Modifier and Type	Method	Description
protected void	decode(ChannelHandlerContext ctx, ByteBuf msg, List<Object> out)	Decode from one message to an other.

Methods inherited from class MessageToMessageDecoder

acceptInboundMessage, channelRead, channelReadComplete

Methods inherited from class ChannelInboundHandlerAdapter

channelActive, channelInactive, channelRegistered, channelUnregistered, channelWritabilityChanged, exceptionCaught, userEventTriggered

Methods inherited from class ChannelHandlerAdapter

ensureNotSharable, handlerAdded, handlerRemoved, isSharable

Methods inherited from class Object

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

Methods inherited from interface ChannelHandler

handlerAdded, handlerRemoved

Constructor Details

ByteArrayDecoder

public ByteArrayDecoder()

Method Details

decode

protected void decode(ChannelHandlerContext ctx,
 ByteBuf msg,
 List<Object> out)
               throws Exception

Description copied from class: MessageToMessageDecoder

Decode from one message to an other. This method will be called for each written message that can be handled by this decoder.

Specified by:

decode in class MessageToMessageDecoder<ByteBuf>

Parameters:

ctx - the ChannelHandlerContext which this MessageToMessageDecoder belongs to

msg - the message to decode to an other one

out - the List to which decoded messages should be added

Throws:

Exception - is thrown if an error occurs