org.jboss.netty.handler.codec.rtsp
Class RtspMessageDecoder

java.lang.Object
  org.jboss.netty.channel.SimpleChannelUpstreamHandler
      org.jboss.netty.handler.codec.replay.ReplayingDecoder<HttpMessageDecoder.State>
          org.jboss.netty.handler.codec.http.HttpMessageDecoder
              org.jboss.netty.handler.codec.rtsp.RtspMessageDecoder

All Implemented Interfaces:

ChannelHandler, ChannelUpstreamHandler

Direct Known Subclasses:

RtspRequestDecoder, RtspResponseDecoder

public abstract class RtspMessageDecoder
extends HttpMessageDecoder

Decodes ChannelBuffers into RTSP messages represented in HttpMessages.

Parameters that prevents excessive memory consumption

Name	Meaning
maxInitialLineLength	The maximum length of the initial line (e.g. "SETUP / RTSP/1.0" or "RTSP/1.0 200 OK") If the length of the initial line exceeds this value, a TooLongFrameException will be raised.
maxHeaderSize	The maximum length of all headers. If the sum of the length of each header exceeds this value, a TooLongFrameException will be raised.
maxContentLength	The maximum length of the content. If the content length exceeds this value, a TooLongFrameException will be raised.

Version:

$Rev: 2282 $, $Date: 2010-05-19 16:51:38 +0900 (Wed, 19 May 2010) $

Author:

The Netty Project, Amit Bhayani, Trustin Lee

Nested Class Summary

Nested classes/interfaces inherited from class org.jboss.netty.handler.codec.http.HttpMessageDecoder

HttpMessageDecoder.State

Nested classes/interfaces inherited from interface org.jboss.netty.channel.ChannelHandler

ChannelHandler.Sharable

Constructor Summary

protected	RtspMessageDecoder() Creates a new instance with the default maxInitialLineLength (4096}, maxHeaderSize (8192), and maxContentLength (8192).
protected	RtspMessageDecoder(int maxInitialLineLength, int maxHeaderSize, int maxContentLength) Creates a new instance with the specified parameters.

Method Summary

protected Object	decode(ChannelHandlerContext ctx, Channel channel, ChannelBuffer buffer, HttpMessageDecoder.State state) Decodes the received packets so far into a frame.
protected boolean	isContentAlwaysEmpty(HttpMessage msg)

Methods inherited from class org.jboss.netty.handler.codec.http.HttpMessageDecoder

createMessage, isDecodingRequest

Methods inherited from class org.jboss.netty.handler.codec.replay.ReplayingDecoder

actualReadableBytes, channelClosed, channelDisconnected, checkpoint, checkpoint, decodeLast, exceptionCaught, getState, internalBuffer, messageReceived, setState

Methods inherited from class org.jboss.netty.channel.SimpleChannelUpstreamHandler

channelBound, channelConnected, channelInterestChanged, channelOpen, channelUnbound, childChannelClosed, childChannelOpen, handleUpstream, writeComplete

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

RtspMessageDecoder

protected RtspMessageDecoder()

Creates a new instance with the default maxInitialLineLength (4096}, maxHeaderSize (8192), and maxContentLength (8192).

RtspMessageDecoder

protected RtspMessageDecoder(int maxInitialLineLength,
                             int maxHeaderSize,
                             int maxContentLength)

Creates a new instance with the specified parameters.

Method Detail

decode

protected Object decode(ChannelHandlerContext ctx,
                        Channel channel,
                        ChannelBuffer buffer,
                        HttpMessageDecoder.State state)
                 throws Exception

Description copied from class: ReplayingDecoder

Decodes the received packets so far into a frame.

Overrides:

decode in class HttpMessageDecoder

Parameters:

ctx - the context of this handler

channel - the current channel

buffer - the cumulative buffer of received packets so far. Note that the buffer might be empty, which means you should not make an assumption that the buffer contains at least one byte in your decoder implementation.

state - the current decoder state (null if unused)

Returns:

the decoded frame

Throws:

Exception

isContentAlwaysEmpty

protected boolean isContentAlwaysEmpty(HttpMessage msg)

Overrides:

isContentAlwaysEmpty in class HttpMessageDecoder