io.netty.handler.codec.compression

Class JZlibDecoder

java.lang.Object

io.netty.channel.ChannelHandlerAdapter

io.netty.channel.ChannelInboundHandlerAdapter

io.netty.handler.codec.ByteToMessageDecoder

io.netty.handler.codec.compression.ZlibDecoder

io.netty.handler.codec.compression.JZlibDecoder

All Implemented Interfaces:

ChannelHandler, ChannelInboundHandler

public class JZlibDecoder
extends ZlibDecoder

Nested Class Summary

Nested classes/interfaces inherited from class io.netty.handler.codec.ByteToMessageDecoder

ByteToMessageDecoder.Cumulator

Nested classes/interfaces inherited from interface io.netty.channel.ChannelHandler

ChannelHandler.Sharable

Field Summary

Fields inherited from class io.netty.handler.codec.compression.ZlibDecoder

maxAllocation

Fields inherited from class io.netty.handler.codec.ByteToMessageDecoder

COMPOSITE_CUMULATOR, MERGE_CUMULATOR

Constructor Summary

Constructors

Constructor and Description
JZlibDecoder() Creates a new instance with the default wrapper (ZlibWrapper.ZLIB).
JZlibDecoder(byte[] dictionary) Creates a new instance with the specified preset dictionary.
JZlibDecoder(byte[] dictionary, int maxAllocation) Creates a new instance with the specified preset dictionary and maximum buffer allocation.
JZlibDecoder(int maxAllocation) Creates a new instance with the default wrapper (ZlibWrapper.ZLIB) and specified maximum buffer allocation.
JZlibDecoder(ZlibWrapper wrapper) Creates a new instance with the specified wrapper.
JZlibDecoder(ZlibWrapper wrapper, int maxAllocation) Creates a new instance with the specified wrapper and maximum buffer allocation.

Method Summary

Modifier and Type	Method and Description
protected void	decode(ChannelHandlerContext ctx, ByteBuf in, List<Object> out) Decode the from one ByteBuf to an other.
protected void	decompressionBufferExhausted(ByteBuf buffer) Called when the decompression buffer cannot be expanded further.
boolean	isClosed() Returns true if and only if the end of the compressed stream has been reached.

Methods inherited from class io.netty.handler.codec.compression.ZlibDecoder

prepareDecompressBuffer

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

JZlibDecoder

public JZlibDecoder()

Creates a new instance with the default wrapper (ZlibWrapper.ZLIB).

Throws:

DecompressionException - if failed to initialize zlib

JZlibDecoder

public JZlibDecoder(int maxAllocation)

Creates a new instance with the default wrapper (ZlibWrapper.ZLIB) and specified maximum buffer allocation.

Parameters:

maxAllocation - Maximum size of the decompression buffer. Must be >= 0. If zero, maximum size is decided by the ByteBufAllocator.

Throws:

DecompressionException - if failed to initialize zlib

JZlibDecoder

public JZlibDecoder(ZlibWrapper wrapper)

Creates a new instance with the specified wrapper.

Throws:

DecompressionException - if failed to initialize zlib

JZlibDecoder

public JZlibDecoder(ZlibWrapper wrapper,
                    int maxAllocation)

Creates a new instance with the specified wrapper and maximum buffer allocation.

Parameters:

maxAllocation - Maximum size of the decompression buffer. Must be >= 0. If zero, maximum size is decided by the ByteBufAllocator.

Throws:

DecompressionException - if failed to initialize zlib

JZlibDecoder

public JZlibDecoder(byte[] dictionary)

Creates a new instance with the specified preset dictionary. The wrapper is always ZlibWrapper.ZLIB because it is the only format that supports the preset dictionary.

Throws:

DecompressionException - if failed to initialize zlib

JZlibDecoder

public JZlibDecoder(byte[] dictionary,
                    int maxAllocation)

Creates a new instance with the specified preset dictionary and maximum buffer allocation. The wrapper is always ZlibWrapper.ZLIB because it is the only format that supports the preset dictionary.

Parameters:

maxAllocation - Maximum size of the decompression buffer. Must be >= 0. If zero, maximum size is decided by the ByteBufAllocator.

Throws:

DecompressionException - if failed to initialize zlib

Method Detail

isClosed

public boolean isClosed()

Returns true if and only if the end of the compressed stream has been reached.

Specified by:

isClosed in class ZlibDecoder

decode

protected void decode(ChannelHandlerContext ctx,
                      ByteBuf in,
                      List<Object> out)
               throws Exception

Description copied from class: ByteToMessageDecoder

Decode the from one ByteBuf to an other. This method will be called till either the input ByteBuf has nothing to read when return from this method or till nothing was read from the input ByteBuf.

Specified by:

decode in class ByteToMessageDecoder

Parameters:

ctx - the ChannelHandlerContext which this ByteToMessageDecoder belongs to

in - the ByteBuf from which to read data

out - the List to which decoded messages should be added

Throws:

Exception - is thrown if an error occurs

decompressionBufferExhausted

protected void decompressionBufferExhausted(ByteBuf buffer)

Description copied from class: ZlibDecoder

Called when the decompression buffer cannot be expanded further. Default implementation is a no-op, but subclasses can override in case they want to do something before the DecompressionException is thrown, such as log the data that was decompressed so far.

Overrides:

decompressionBufferExhausted in class ZlibDecoder