Class DatagramPacketDecoder

java.lang.Object

io.netty.channel.ChannelHandlerAdapter

io.netty.channel.ChannelInboundHandlerAdapter

io.netty.handler.codec.MessageToMessageDecoder<DatagramPacket>

io.netty.handler.codec.DatagramPacketDecoder

All Implemented Interfaces:

ChannelHandler, ChannelInboundHandler

public class DatagramPacketDecoder
extends MessageToMessageDecoder<DatagramPacket>

A decoder that decodes the content of the received DatagramPacket using the specified ByteBuf decoder. E.g.,

ChannelPipeline pipeline = ...;
pipeline.addLast("udpDecoder", new DatagramPacketDecoder(new ProtobufDecoder(...));

Nested Class Summary

Nested classes/interfaces inherited from interface ChannelHandler

ChannelHandler.Sharable

Constructor Summary

Constructors

Constructor	Description
DatagramPacketDecoder(MessageToMessageDecoder<ByteBuf> decoder)	Create a DatagramPacket decoder using the specified ByteBuf decoder.

Method Summary

Modifier and Type	Method	Description
boolean	acceptInboundMessage(Object msg)	Returns true if the given message should be handled.
void	channelActive(ChannelHandlerContext ctx)	Calls ChannelHandlerContext.fireChannelActive() to forward to the next ChannelInboundHandler in the ChannelPipeline.
void	channelInactive(ChannelHandlerContext ctx)	Calls ChannelHandlerContext.fireChannelInactive() to forward to the next ChannelInboundHandler in the ChannelPipeline.
void	channelReadComplete(ChannelHandlerContext ctx)	Calls ChannelHandlerContext.fireChannelReadComplete() to forward to the next ChannelInboundHandler in the ChannelPipeline.
void	channelRegistered(ChannelHandlerContext ctx)	Calls ChannelHandlerContext.fireChannelRegistered() to forward to the next ChannelInboundHandler in the ChannelPipeline.
void	channelUnregistered(ChannelHandlerContext ctx)	Calls ChannelHandlerContext.fireChannelUnregistered() to forward to the next ChannelInboundHandler in the ChannelPipeline.
void	channelWritabilityChanged(ChannelHandlerContext ctx)	Calls ChannelHandlerContext.fireChannelWritabilityChanged() to forward to the next ChannelInboundHandler in the ChannelPipeline.
protected void	decode(ChannelHandlerContext ctx, DatagramPacket msg, List<Object> out)	Decode from one message to an other.
void	exceptionCaught(ChannelHandlerContext ctx, Throwable cause)	Calls ChannelHandlerContext.fireExceptionCaught(Throwable) to forward to the next ChannelHandler in the ChannelPipeline.
void	handlerAdded(ChannelHandlerContext ctx)	Do nothing by default, sub-classes may override this method.
void	handlerRemoved(ChannelHandlerContext ctx)	Do nothing by default, sub-classes may override this method.
boolean	isSharable()	Return true if the implementation is ChannelHandler.Sharable and so can be added to different ChannelPipelines.
void	userEventTriggered(ChannelHandlerContext ctx, Object evt)	Calls ChannelHandlerContext.fireUserEventTriggered(Object) to forward to the next ChannelInboundHandler in the ChannelPipeline.

Methods inherited from class MessageToMessageDecoder

channelRead

Methods inherited from class ChannelHandlerAdapter

ensureNotSharable

Methods inherited from class Object

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

Constructor Details

DatagramPacketDecoder

public DatagramPacketDecoder(MessageToMessageDecoder<ByteBuf> decoder)

Create a DatagramPacket decoder using the specified ByteBuf decoder.

Parameters:

decoder - the specified ByteBuf decoder

Method Details

acceptInboundMessage

public boolean acceptInboundMessage(Object msg)
                             throws Exception

Description copied from class: MessageToMessageDecoder

Returns true if the given message should be handled. If false it will be passed to the next ChannelInboundHandler in the ChannelPipeline.

Overrides:

acceptInboundMessage in class MessageToMessageDecoder<DatagramPacket>

Throws:

Exception

decode

protected void decode(ChannelHandlerContext ctx,
 DatagramPacket msg,
 List<Object> out)
               throws Exception

Description copied from class: MessageToMessageDecoder

Decode from one message to an other. This method will be called for each written message that can be handled by this decoder.

Specified by:

decode in class MessageToMessageDecoder<DatagramPacket>

Parameters:

ctx - the ChannelHandlerContext which this MessageToMessageDecoder belongs to

msg - the message to decode to an other one

out - the List to which decoded messages should be added

Throws:

Exception - is thrown if an error occurs

channelRegistered

public void channelRegistered(ChannelHandlerContext ctx)
                       throws Exception

Description copied from class: ChannelInboundHandlerAdapter

Calls ChannelHandlerContext.fireChannelRegistered() to forward to the next ChannelInboundHandler in the ChannelPipeline. Sub-classes may override this method to change behavior.

Specified by:

channelRegistered in interface ChannelInboundHandler

Overrides:

channelRegistered in class ChannelInboundHandlerAdapter

Throws:

Exception

channelUnregistered

public void channelUnregistered(ChannelHandlerContext ctx)
                         throws Exception

Description copied from class: ChannelInboundHandlerAdapter

Calls ChannelHandlerContext.fireChannelUnregistered() to forward to the next ChannelInboundHandler in the ChannelPipeline. Sub-classes may override this method to change behavior.

Specified by:

channelUnregistered in interface ChannelInboundHandler

Overrides:

channelUnregistered in class ChannelInboundHandlerAdapter

Throws:

Exception

channelActive

public void channelActive(ChannelHandlerContext ctx)
                   throws Exception

Description copied from class: ChannelInboundHandlerAdapter

Calls ChannelHandlerContext.fireChannelActive() to forward to the next ChannelInboundHandler in the ChannelPipeline. Sub-classes may override this method to change behavior.

Specified by:

channelActive in interface ChannelInboundHandler

Overrides:

channelActive in class ChannelInboundHandlerAdapter

Throws:

Exception

channelInactive

public void channelInactive(ChannelHandlerContext ctx)
                     throws Exception

Description copied from class: ChannelInboundHandlerAdapter

Calls ChannelHandlerContext.fireChannelInactive() to forward to the next ChannelInboundHandler in the ChannelPipeline. Sub-classes may override this method to change behavior.

Specified by:

channelInactive in interface ChannelInboundHandler

Overrides:

channelInactive in class ChannelInboundHandlerAdapter

Throws:

Exception

channelReadComplete

public void channelReadComplete(ChannelHandlerContext ctx)
                         throws Exception

Description copied from class: ChannelInboundHandlerAdapter

Calls ChannelHandlerContext.fireChannelReadComplete() to forward to the next ChannelInboundHandler in the ChannelPipeline. Sub-classes may override this method to change behavior.

Specified by:

channelReadComplete in interface ChannelInboundHandler

Overrides:

channelReadComplete in class MessageToMessageDecoder<DatagramPacket>

Throws:

Exception

userEventTriggered

public void userEventTriggered(ChannelHandlerContext ctx,
 Object evt)
                        throws Exception

Description copied from class: ChannelInboundHandlerAdapter

Calls ChannelHandlerContext.fireUserEventTriggered(Object) to forward to the next ChannelInboundHandler in the ChannelPipeline. Sub-classes may override this method to change behavior.

Specified by:

userEventTriggered in interface ChannelInboundHandler

Overrides:

userEventTriggered in class ChannelInboundHandlerAdapter

Throws:

Exception

channelWritabilityChanged

public void channelWritabilityChanged(ChannelHandlerContext ctx)
                               throws Exception

Description copied from class: ChannelInboundHandlerAdapter

Calls ChannelHandlerContext.fireChannelWritabilityChanged() to forward to the next ChannelInboundHandler in the ChannelPipeline. Sub-classes may override this method to change behavior.

Specified by:

channelWritabilityChanged in interface ChannelInboundHandler

Overrides:

channelWritabilityChanged in class ChannelInboundHandlerAdapter

Throws:

Exception

exceptionCaught

public void exceptionCaught(ChannelHandlerContext ctx,
 Throwable cause)
                     throws Exception

Description copied from class: ChannelInboundHandlerAdapter

Calls ChannelHandlerContext.fireExceptionCaught(Throwable) to forward to the next ChannelHandler in the ChannelPipeline. Sub-classes may override this method to change behavior.

Specified by:

exceptionCaught in interface ChannelHandler

Specified by:

exceptionCaught in interface ChannelInboundHandler

Overrides:

exceptionCaught in class ChannelInboundHandlerAdapter

Throws:

Exception

handlerAdded

public void handlerAdded(ChannelHandlerContext ctx)
                  throws Exception

Description copied from class: ChannelHandlerAdapter

Do nothing by default, sub-classes may override this method.

Specified by:

handlerAdded in interface ChannelHandler

Overrides:

handlerAdded in class ChannelHandlerAdapter

Throws:

Exception

handlerRemoved

public void handlerRemoved(ChannelHandlerContext ctx)
                    throws Exception

Description copied from class: ChannelHandlerAdapter

Do nothing by default, sub-classes may override this method.

Specified by:

handlerRemoved in interface ChannelHandler

Overrides:

handlerRemoved in class ChannelHandlerAdapter

Throws:

Exception

isSharable

public boolean isSharable()

Description copied from class: ChannelHandlerAdapter

Return true if the implementation is ChannelHandler.Sharable and so can be added to different ChannelPipelines.

Overrides:

isSharable in class ChannelHandlerAdapter