All Implemented Interfaces:

ChannelHandler, ChannelInboundHandler

public class FixedLengthFrameDecoder
extends ByteToMessageDecoder 

 +---+----+------+----+
 | A | BC | DEFG | HI |
 +---+----+------+----+
 

 +-----+-----+-----+
 | ABC | DEF | GHI |
 +-----+-----+-----+
 

• Nested Class Summary

  • Nested classes/interfaces inherited from class io.netty.handler.codec.ByteToMessageDecoder

    ByteToMessageDecoder.Cumulator

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

    ChannelHandler.Sharable

• Field Summary

  • Fields inherited from class io.netty.handler.codec.ByteToMessageDecoder

    COMPOSITE_CUMULATOR, MERGE_CUMULATOR

• Constructor Summary

  Constructors

  Constructor and Description
  FixedLengthFrameDecoder (int frameLength) Creates a new instance.

• Method Summary

  All Methods

  Modifier and Type	Method and Description
  protected java.lang.Object	decode (ChannelHandlerContext ctx, ByteBuf in) Create a frame out of the ByteBuf and return it.
  protected void	decode (ChannelHandlerContext ctx, ByteBuf in, java.util.List<java.lang.Object> out) Decode the from one ByteBuf to an other.

  • Methods inherited from class io.netty.handler.codec.ByteToMessageDecoder

    actualReadableBytes, callDecode, channelInactive, channelRead, channelReadComplete, decodeLast, discardSomeReadBytes, handlerRemoved, handlerRemoved0, internalBuffer, isSingleDecode, setCumulator, setDiscardAfterReads, setSingleDecode, userEventTriggered

  • Methods inherited from class io.netty.channel.ChannelInboundHandlerAdapter

    channelActive, channelRegistered, channelUnregistered, channelWritabilityChanged, exceptionCaught

  • Methods inherited from class io.netty.channel.ChannelHandlerAdapter

    ensureNotSharable, handlerAdded, 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

    handlerAdded

• Constructor Detail

  • FixedLengthFrameDecoder

    public FixedLengthFrameDecoder(int frameLength)

    Creates a new instance.

    Parameters:

    frameLength - the length of the frame

• Method Detail

  • decode

    protected final void decode(ChannelHandlerContext ctx,
     ByteBuf in,
     java.util.List<java.lang.Object> out)
     throws java.lang.Exception

    Description copied from class: ByteToMessageDecoder
    Decode the from one ByteBuf to an other. This method will be called till either the input ByteBuf has nothing to read when return from this method or till nothing was read from the input ByteBuf.

    Specified by:

    decode in class ByteToMessageDecoder

    Parameters:

    ctx - the ChannelHandlerContext which this ByteToMessageDecoder belongs to

    in - the ByteBuf from which to read data

    out - the List to which decoded messages should be added

    Throws:

    java.lang.Exception - is thrown if an error occurs

  • decode

    protected java.lang.Object decode(ChannelHandlerContext ctx,
     ByteBuf in)
     throws java.lang.Exception

    Create a frame out of the ByteBuf and return it.

    Parameters:

    ctx - the ChannelHandlerContext which this ByteToMessageDecoder belongs to

    in - the ByteBuf from which to read data

    Returns:

    frame the ByteBuf which represent the frame or null if no frame could be created.

    Throws:

    java.lang.Exception