Class AbstractMemcacheObjectEncoder<M extends MemcacheMessage>

java.lang.Object

io.netty.channel.ChannelHandlerAdapter

io.netty.channel.ChannelOutboundHandlerAdapter

io.netty.handler.codec.MessageToMessageEncoder<java.lang.Object>

io.netty.handler.codec.memcache.AbstractMemcacheObjectEncoder<M>

All Implemented Interfaces:

ChannelHandler, ChannelOutboundHandler

Direct Known Subclasses:

AbstractBinaryMemcacheEncoder

@UnstableApi
public abstract class AbstractMemcacheObjectEncoder<M extends MemcacheMessage>
extends MessageToMessageEncoder<java.lang.Object>

A general purpose AbstractMemcacheObjectEncoder that encodes MemcacheMessages.

Note that this class is designed to be extended, especially because both the binary and ascii protocol require different treatment of their messages. Since the content chunk writing is the same for both, the encoder abstracts this right away.

Nested Class Summary

Nested classes/interfaces inherited from interface ChannelHandler

ChannelHandler.Sharable

Field Summary

Fields

Modifier and Type	Field	Description
private boolean	expectingMoreContent

Constructor Summary

Constructors

Constructor	Description
AbstractMemcacheObjectEncoder()

Method Summary

Modifier and Type	Method	Description
boolean	acceptOutboundMessage(java.lang.Object msg)	Returns true if the given message should be handled.
private static int	contentLength(java.lang.Object msg)	Determine the content length of the given object.
protected void	encode(ChannelHandlerContext ctx, java.lang.Object msg, java.util.List<java.lang.Object> out)	Encode from one message to an other.
private static java.lang.Object	encodeAndRetain(java.lang.Object msg)	Encode the content, depending on the object type.
protected abstract ByteBuf	encodeMessage(ChannelHandlerContext ctx, M msg)	Take the given MemcacheMessage and encode it into a writable ByteBuf.

Methods inherited from class MessageToMessageEncoder

write

Methods inherited from class ChannelOutboundHandlerAdapter

bind, close, connect, deregister, disconnect, flush, read

Methods inherited from class ChannelHandlerAdapter

ensureNotSharable, exceptionCaught, handlerAdded, handlerRemoved, isSharable

Methods inherited from class java.lang.Object

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

Methods inherited from interface ChannelHandler

exceptionCaught, handlerAdded, handlerRemoved

Field Details

expectingMoreContent

private boolean expectingMoreContent

Constructor Details

AbstractMemcacheObjectEncoder

public AbstractMemcacheObjectEncoder()

Method Details

encode

protected void encode(ChannelHandlerContext ctx,
 java.lang.Object msg,
 java.util.List<java.lang.Object> out)
               throws java.lang.Exception

Description copied from class: MessageToMessageEncoder

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

Specified by:

encode in class MessageToMessageEncoder<java.lang.Object>

Parameters:

ctx - the ChannelHandlerContext which this MessageToMessageEncoder belongs to

msg - the message to encode to an other one

out - the List into which the encoded msg should be added needs to do some kind of aggregation

Throws:

java.lang.Exception - is thrown if an error occurs

acceptOutboundMessage

public boolean acceptOutboundMessage(java.lang.Object msg)
                              throws java.lang.Exception

Description copied from class: MessageToMessageEncoder

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

Overrides:

acceptOutboundMessage in class MessageToMessageEncoder<java.lang.Object>

Throws:

java.lang.Exception

encodeMessage

protected abstract ByteBuf encodeMessage(ChannelHandlerContext ctx,
 M msg)

Take the given MemcacheMessage and encode it into a writable ByteBuf.

Parameters:

ctx - the channel handler context.

msg - the message to encode.

Returns:

the ByteBuf representation of the message.

contentLength

private static int contentLength(java.lang.Object msg)

Determine the content length of the given object.

Parameters:

msg - the object to determine the length of.

Returns:

the determined content length.

encodeAndRetain

private static java.lang.Object encodeAndRetain(java.lang.Object msg)

Encode the content, depending on the object type.

Parameters:

msg - the object to encode.

Returns:

the encoded object.