org.openspaces.memcached.protocol.text

Class MemcachedFrameDecoder

java.lang.Object

io.netty.channel.ChannelHandlerAdapter

io.netty.channel.ChannelInboundHandlerAdapter

io.netty.handler.codec.ByteToMessageDecoder

org.openspaces.memcached.protocol.text.MemcachedFrameDecoder

All Implemented Interfaces:

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

public final class MemcachedFrameDecoder
extends io.netty.handler.codec.ByteToMessageDecoder

The frame decoder is responsible for breaking the original stream up into a series of lines.

The code here is heavily based on Netty's DelimiterBasedFrameDecoder, but has been modified because the memcached protocol has two states: 1) processing CRLF delimited lines and 2) spooling results for SET/ADD

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 and Description
MemcachedFrameDecoder(SessionStatus status, int maxFrameLength) Creates a new instance.

Method Summary

Modifier and Type	Method and Description
static int	bytesBefore(io.netty.buffer.ByteBuf buf, io.netty.buffer.ByteBuf pattern)
protected void	decode(io.netty.channel.ChannelHandlerContext ctx, io.netty.buffer.ByteBuf buffer, 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 Detail

MemcachedFrameDecoder

public MemcachedFrameDecoder(SessionStatus status,
                             int maxFrameLength)

Creates a new instance.

Parameters:

status - session status instance for holding state of the session

maxFrameLength - the maximum length of the decoded frame. A TooLongFrameException is thrown if frame length is exceeded

Method Detail

decode

protected void decode(io.netty.channel.ChannelHandlerContext ctx,
                      io.netty.buffer.ByteBuf buffer,
                      List<Object> out)
               throws Exception

Specified by:

decode in class io.netty.handler.codec.ByteToMessageDecoder

Throws:

Exception

bytesBefore

public static int bytesBefore(io.netty.buffer.ByteBuf buf,
                              io.netty.buffer.ByteBuf pattern)