Package org.jboss.netty.handler.codec.marshalling

Class CompatibleMarshallingDecoder

java.lang.Object

org.jboss.netty.channel.SimpleChannelUpstreamHandler

org.jboss.netty.handler.codec.frame.FrameDecoder

org.jboss.netty.handler.codec.replay.ReplayingDecoder<VoidEnum>

org.jboss.netty.handler.codec.marshalling.CompatibleMarshallingDecoder

All Implemented Interfaces:

ChannelHandler, ChannelUpstreamHandler, LifeCycleAwareChannelHandler

public class CompatibleMarshallingDecoder
extends ReplayingDecoder<VoidEnum>

ReplayingDecoder which use an Unmarshaller to read the Object out of the ChannelBuffer. If you can you should use MarshallingDecoder.

Nested Class Summary

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

ChannelHandler.Sharable

Field Summary

Fields

Modifier and Type	Field	Description
private boolean	discardingTooLongFrame
protected int	maxObjectSize
protected UnmarshallerProvider	provider

Fields inherited from class org.jboss.netty.handler.codec.frame.FrameDecoder

cumulation, DEFAULT_MAX_COMPOSITEBUFFER_COMPONENTS

Constructor Summary

Constructors

Constructor	Description
CompatibleMarshallingDecoder(UnmarshallerProvider provider, int maxObjectSize)	Create a new instance of CompatibleMarshallingDecoder.

Method Summary

Modifier and Type	Method	Description
protected java.lang.Object	decode(ChannelHandlerContext ctx, Channel channel, ChannelBuffer buffer, VoidEnum state)	Decodes the received packets so far into a frame.
protected java.lang.Object	decodeLast(ChannelHandlerContext ctx, Channel channel, ChannelBuffer buffer, VoidEnum state)	Decodes the received data so far into a frame when the channel is disconnected.
void	exceptionCaught(ChannelHandlerContext ctx, ExceptionEvent e)	Calls Channel.close() if a TooLongFrameException was thrown

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

checkpoint, checkpoint, cleanup, decode, decodeLast, getState, internalBuffer, messageReceived, setState

Methods inherited from class org.jboss.netty.handler.codec.frame.FrameDecoder

actualReadableBytes, afterAdd, afterRemove, appendToCumulation, beforeAdd, beforeRemove, channelClosed, channelDisconnected, extractFrame, getMaxCumulationBufferCapacity, getMaxCumulationBufferComponents, isUnfold, newCumulationBuffer, replace, setMaxCumulationBufferCapacity, setMaxCumulationBufferComponents, setUnfold, unfoldAndFireMessageReceived, updateCumulation

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

Field Detail

provider

protected final UnmarshallerProvider provider

maxObjectSize

protected final int maxObjectSize

discardingTooLongFrame

private boolean discardingTooLongFrame

Constructor Detail

CompatibleMarshallingDecoder

public CompatibleMarshallingDecoder(UnmarshallerProvider provider,
                                    int maxObjectSize)

Create a new instance of CompatibleMarshallingDecoder.

Parameters:

provider - the UnmarshallerProvider which is used to obtain the Unmarshaller for the Channel

maxObjectSize - the maximal size (in bytes) of the Object to unmarshal. Once the size is exceeded the Channel will get closed. Use a a maxObjectSize of Integer.MAX_VALUE to disable this. You should only do this if you are sure that the received Objects will never be big and the sending side are trusted, as this opens the possibility for a DOS-Attack due an OutOfMemoryError.

Method Detail

decode

protected java.lang.Object decode(ChannelHandlerContext ctx,
                                  Channel channel,
                                  ChannelBuffer buffer,
                                  VoidEnum state)
                           throws java.lang.Exception

Description copied from class: ReplayingDecoder

Decodes the received packets so far into a frame.

Specified by:

decode in class ReplayingDecoder<VoidEnum>

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:

java.lang.Exception

decodeLast

protected java.lang.Object decodeLast(ChannelHandlerContext ctx,
                                      Channel channel,
                                      ChannelBuffer buffer,
                                      VoidEnum state)
                               throws java.lang.Exception

Description copied from class: ReplayingDecoder

Decodes the received data so far into a frame when the channel is disconnected.

Overrides:

decodeLast in class ReplayingDecoder<VoidEnum>

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:

java.lang.Exception

exceptionCaught

public void exceptionCaught(ChannelHandlerContext ctx,
                            ExceptionEvent e)
                     throws java.lang.Exception

Calls Channel.close() if a TooLongFrameException was thrown

Overrides:

exceptionCaught in class FrameDecoder

Throws:

java.lang.Exception