org.apache.cassandra.net

Class FrameDecoderCrc

java.lang.Object

io.netty.channel.ChannelHandlerAdapter

io.netty.channel.ChannelInboundHandlerAdapter

org.apache.cassandra.net.FrameDecoder

org.apache.cassandra.net.FrameDecoderCrc

All Implemented Interfaces:

io.netty.channel.ChannelHandler, io.netty.channel.ChannelInboundHandler

public final class FrameDecoderCrc
extends FrameDecoder

Framing format that protects integrity of data in movement with CRCs (of both header and payload). Every on-wire frame contains: 1. Payload length (17 bits) 2. isSelfContained flag (1 bit) 3. Header padding (6 bits) 4. CRC24 of the header (24 bits) 5. Payload (up to 2 ^ 17 - 1 bits) 6. Payload CRC32 (32 bits) 0 1 2 3 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | Payload Length |C| | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ CRC24 of Header | | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ + | | + + | Payload | + + | | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | CRC32 of Payload | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+

Nested Class Summary

Nested classes/interfaces inherited from class org.apache.cassandra.net.FrameDecoder

FrameDecoder.CorruptFrame, FrameDecoder.Frame, FrameDecoder.FrameProcessor, FrameDecoder.IntactFrame

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

io.netty.channel.ChannelHandler.Sharable

Field Summary

Fields inherited from class org.apache.cassandra.net.FrameDecoder

allocator

Constructor Summary

Constructors

Constructor and Description
FrameDecoderCrc(BufferPoolAllocator allocator)

Method Summary

Modifier and Type	Method and Description
static FrameDecoderCrc	create(BufferPoolAllocator allocator)
protected void	decode(java.util.Collection<FrameDecoder.Frame> into, ShareableBytes newBytes, int headerLength) Decode a number of frames using the above abstract method implementations.

Methods inherited from class org.apache.cassandra.net.FrameDecoder

activate, channelInactive, channelRead, channelReadComplete, discard, handlerAdded

Methods inherited from class io.netty.channel.ChannelInboundHandlerAdapter

channelActive, channelRegistered, channelUnregistered, channelWritabilityChanged, exceptionCaught, userEventTriggered

Methods inherited from class io.netty.channel.ChannelHandlerAdapter

ensureNotSharable, 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

handlerRemoved

Constructor Detail

FrameDecoderCrc

public FrameDecoderCrc(BufferPoolAllocator allocator)

Method Detail

create

public static FrameDecoderCrc create(BufferPoolAllocator allocator)

decode

@Inline
protected void decode(java.util.Collection<FrameDecoder.Frame> into,
                              ShareableBytes newBytes,
                              int headerLength)

Decode a number of frames using the above abstract method implementations. It is expected for this method to be invoked by the implementing class' FrameDecoder.decode(Collection, ShareableBytes) so that this implementation will be inlined, and all of the abstract method implementations will also be inlined.