java.lang.Object
- io.netty5.channel.ChannelHandlerAdapter
- - io.netty5.handler.codec.ByteToMessageDecoder
  - - io.netty5.handler.codec.FixedLengthFrameDecoder

All Implemented Interfaces:

ChannelHandler
```
public class FixedLengthFrameDecoder
extends ByteToMessageDecoder
```
A decoder that splits the received Buffers by the fixed number of bytes. For example, if you received the following four fragmented packets:
```
 +---+----+------+----+
 | A | BC | DEFG | HI |
 +---+----+------+----+
 
```
A FixedLengthFrameDecoder(3) will decode them into the following three packets with the fixed length:
```
 +-----+-----+-----+
 | ABC | DEF | GHI |
 +-----+-----+-----+
 
```

Nested Class Summary
- Nested classes/interfaces inherited from class io.netty5.handler.codec.ByteToMessageDecoder
  ByteToMessageDecoder.Cumulator

Field Summary
- Fields inherited from class io.netty5.handler.codec.ByteToMessageDecoder
  COMPOSITE_CUMULATOR, MERGE_CUMULATOR

Constructor Summary

Constructors
Constructor	Description
`FixedLengthFrameDecoder(int frameLength)`	Creates a new instance.
`FixedLengthFrameDecoder(int frameLength, ByteToMessageDecoder.Cumulator cumulator)`	Creates a new instance.

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`protected void`	`decode(ChannelHandlerContext ctx, Buffer in)`	Decode the from one `Buffer` to another.
`protected Object`	`decode0(ChannelHandlerContext ctx, Buffer in)`	Create a frame out of the `Buffer` and return it.

Methods inherited from class io.netty5.handler.codec.ByteToMessageDecoder
actualReadableBytes, channelInactive, channelRead, channelReadComplete, channelShutdown, decodeLast, discardSomeReadBytes, handlerAdded, handlerAdded0, handlerRemoved, handlerRemoved0, internalBuffer, isSharable, isSingleDecode, setSingleDecode

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Methods inherited from interface io.netty5.channel.ChannelHandler
bind, channelActive, channelExceptionCaught, channelInboundEvent, channelRegistered, channelUnregistered, channelWritabilityChanged, close, connect, deregister, disconnect, flush, pendingOutboundBytes, read, register, sendOutboundEvent, shutdown, write

- Constructor Detail
  - FixedLengthFrameDecoder
```
public FixedLengthFrameDecoder(int frameLength)
```
    Creates a new instance.
    
    Parameters:
    
    frameLength - the length of the frame
  - FixedLengthFrameDecoder
```
public FixedLengthFrameDecoder(int frameLength,
                               ByteToMessageDecoder.Cumulator cumulator)
```
    Creates a new instance.
    
    Parameters:
    
    frameLength - the length of the frame
- Method Detail
  - decode
```
protected final void decode(ChannelHandlerContext ctx,
                            Buffer in)
                     throws Exception
```
    Description copied from class: ByteToMessageDecoder
    
    Decode the from one Buffer to another. This method will be called till either the input Buffer has nothing to read when return from this method or till nothing was read from the input Buffer.
    
    Specified by:
    
    decode in class ByteToMessageDecoder
    
    Parameters:
    
    ctx - the ChannelHandlerContext which this ByteToMessageDecoder belongs to
    
    in - the Buffer from which to read data
    
    Throws:
    
    Exception - is thrown if an error occurs
  - decode0
```
protected Object decode0(ChannelHandlerContext ctx,
                         Buffer in)
                  throws Exception
```
    Create a frame out of the Buffer and return it.
    
    Parameters:
    
    ctx - the ChannelHandlerContext which this ByteToMessageDecoder belongs to
    
    in - the Buffer from which to read data
    
    Returns:
    
    frame the Buffer which represent the frame or null if no frame could be created.
    
    Throws:
    
    Exception

Class FixedLengthFrameDecoder

Nested Class Summary

Nested classes/interfaces inherited from class io.netty5.handler.codec.ByteToMessageDecoder

Field Summary

Fields inherited from class io.netty5.handler.codec.ByteToMessageDecoder

Constructor Summary

Method Summary

Methods inherited from class io.netty5.handler.codec.ByteToMessageDecoder

Methods inherited from class java.lang.Object

Methods inherited from interface io.netty5.channel.ChannelHandler

Constructor Detail

FixedLengthFrameDecoder

FixedLengthFrameDecoder

Method Detail

decode

decode0