io.netty.handler.codec.compression

Class JdkZlibDecoder

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.JdkZlibDecoder

All Implemented Interfaces:

ChannelHandler, ChannelInboundHandler

public class JdkZlibDecoder
extends ZlibDecoder

Decompress a ByteBuf using the inflate algorithm.

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
JdkZlibDecoder() Creates a new instance with the default wrapper (ZlibWrapper.ZLIB).
JdkZlibDecoder(boolean decompressConcatenated)
JdkZlibDecoder(boolean decompressConcatenated, int maxAllocation)
JdkZlibDecoder(byte[] dictionary) Creates a new instance with the specified preset dictionary.
JdkZlibDecoder(byte[] dictionary, int maxAllocation) Creates a new instance with the specified preset dictionary and maximum buffer allocation.
JdkZlibDecoder(int maxAllocation) Creates a new instance with the default wrapper (ZlibWrapper.ZLIB) and the specified maximum buffer allocation.
JdkZlibDecoder(ZlibWrapper wrapper) Creates a new instance with the specified wrapper.
JdkZlibDecoder(ZlibWrapper wrapper, boolean decompressConcatenated)
JdkZlibDecoder(ZlibWrapper wrapper, boolean decompressConcatenated, int maxAllocation)
JdkZlibDecoder(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.
protected void	handlerRemoved0(ChannelHandlerContext ctx) Gets called after the ByteToMessageDecoder was removed from the actual context and it doesn't handle events anymore.
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, 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

JdkZlibDecoder

public JdkZlibDecoder()

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

JdkZlibDecoder

public JdkZlibDecoder(int maxAllocation)

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

Parameters:

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

JdkZlibDecoder

public JdkZlibDecoder(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.

JdkZlibDecoder

public JdkZlibDecoder(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.

JdkZlibDecoder

public JdkZlibDecoder(ZlibWrapper wrapper)

Creates a new instance with the specified wrapper. Be aware that only ZlibWrapper.GZIP, ZlibWrapper.ZLIB and ZlibWrapper.NONE are supported atm.

JdkZlibDecoder

public JdkZlibDecoder(ZlibWrapper wrapper,
                      int maxAllocation)

Creates a new instance with the specified wrapper and maximum buffer allocation. Be aware that only ZlibWrapper.GZIP, ZlibWrapper.ZLIB and ZlibWrapper.NONE are supported atm.

Parameters:

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

JdkZlibDecoder

public JdkZlibDecoder(ZlibWrapper wrapper,
                      boolean decompressConcatenated)

JdkZlibDecoder

public JdkZlibDecoder(ZlibWrapper wrapper,
                      boolean decompressConcatenated,
                      int maxAllocation)

JdkZlibDecoder

public JdkZlibDecoder(boolean decompressConcatenated)

JdkZlibDecoder

public JdkZlibDecoder(boolean decompressConcatenated,
                      int maxAllocation)

Method Detail

isClosed

public boolean isClosed()

Description copied from class: ZlibDecoder

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

handlerRemoved0

protected void handlerRemoved0(ChannelHandlerContext ctx)
                        throws Exception

Description copied from class: ByteToMessageDecoder

Gets called after the ByteToMessageDecoder was removed from the actual context and it doesn't handle events anymore.

Overrides:

handlerRemoved0 in class ByteToMessageDecoder

Throws:

Exception