Package org.drasyl.handler.codec

Class MaxLengthFrameDecoder

java.lang.Object
io.netty.channel.ChannelHandlerAdapter
io.netty.channel.ChannelInboundHandlerAdapter
io.netty.handler.codec.ByteToMessageDecoder
org.drasyl.handler.codec.MaxLengthFrameDecoder
All Implemented Interfaces:
io.netty.channel.ChannelHandler, io.netty.channel.ChannelInboundHandler
public class MaxLengthFrameDecoder extends io.netty.handler.codec.ByteToMessageDecoder
A decoder that splits received ByteBufs into frames not larger then maxFrameLength. For example, if you received the following four fragmented packets: 
 +---+----+-----+----+
 | A | BC | DEF | GH |
 +---+----+-----+----+
A MaxLengthFrameDecoder(2) will decode them into the following three packets with the fixed length: 
 +---+----+----+---+----+
 | A | BC | DE | F | GH |
 +---+----+----+---+----+

  • Nested Class Summary

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

    io.netty.handler.codec.ByteToMessageDecoder.Cumulator

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

    io.netty.channel.ChannelHandler.Sharable

  • Field Summary

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

    COMPOSITE_CUMULATOR, MERGE_CUMULATOR

  • Constructor Summary

    Constructors
    Constructor
    Description
    MaxLengthFrameDecoder(int maxFrameLength)
    Creates a new instance.

  • Method Summary

    Modifier and Type
    Method
    Description
    protected void
    decode(io.netty.channel.ChannelHandlerContext ctx, io.netty.buffer.ByteBuf in, List<Object> out)
     

    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 Details

    • MaxLengthFrameDecoder

      public MaxLengthFrameDecoder(int maxFrameLength)
      Creates a new instance.
      Parameters:
      maxFrameLength - the maximum length of the frame

  • Method Details

    • decode

      protected void decode(io.netty.channel.ChannelHandlerContext ctx, io.netty.buffer.ByteBuf in, List<Object> out) throws Exception
      Specified by:
      decode in class io.netty.handler.codec.ByteToMessageDecoder
      Throws:
      Exception