Package 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

Modifier and Type	Field	Description
private static final int	DEFAULT_MAX_FORWARD_BYTES
private byte[]	dictionary
private boolean	finished
private final int	maxForwardBytes
private boolean	needsRead
private final com.jcraft.jzlib.Inflater	z

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

Method Summary

Modifier and Type	Method	Description
void	channelReadComplete(ChannelHandlerContext ctx)	Calls ChannelHandlerContext.fireChannelReadComplete() to forward to the next ChannelInboundHandler in the ChannelPipeline.
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, 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

Field Details

z

private final com.jcraft.jzlib.Inflater z

dictionary

private byte[] dictionary

DEFAULT_MAX_FORWARD_BYTES

private static final int DEFAULT_MAX_FORWARD_BYTES

maxForwardBytes

private final int maxForwardBytes

needsRead

private boolean needsRead

finished

private volatile boolean finished

Constructor Details

JZlibDecoder

@Deprecated
public JZlibDecoder()

Deprecated.

Use JZlibDecoder(int).

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

@Deprecated
public JZlibDecoder(ZlibWrapper wrapper)

Deprecated.

Use JZlibDecoder(ZlibWrapper, int).

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

@Deprecated
public JZlibDecoder(byte[] dictionary)

Deprecated.

Use JZlibDecoder(byte[], int).

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 Details

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

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 ByteToMessageDecoder

Throws:

Exception

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