io.netty.handler.codec.compression

类 FastLzFrameEncoder

java.lang.Object

io.netty.channel.ChannelHandlerAdapter

io.netty.channel.ChannelOutboundHandlerAdapter

io.netty.handler.codec.MessageToByteEncoder<ByteBuf>

io.netty.handler.codec.compression.FastLzFrameEncoder

所有已实现的接口:

ChannelHandler, ChannelOutboundHandler

public class FastLzFrameEncoder
extends MessageToByteEncoder<ByteBuf>

Compresses a ByteBuf using the FastLZ algorithm. See FastLZ format.

嵌套类概要

从接口继承的嵌套类/接口 io.netty.channel.ChannelHandler

ChannelHandler.Sharable

构造器概要

构造器

构造器和说明
FastLzFrameEncoder() Creates a FastLZ encoder without checksum calculator and with auto detection of compression level.
FastLzFrameEncoder(boolean validateChecksums) Creates a FastLZ encoder with auto detection of compression level and calculation of checksums as specified.
FastLzFrameEncoder(int level) Creates a FastLZ encoder with specified compression level and without checksum calculator.
FastLzFrameEncoder(int level, java.util.zip.Checksum checksum) Creates a FastLZ encoder with specified compression level and checksum calculator.

方法概要

限定符和类型	方法和说明
protected void	encode(ChannelHandlerContext ctx, ByteBuf in, ByteBuf out) Encode a message into a ByteBuf.

从类继承的方法 io.netty.handler.codec.MessageToByteEncoder

acceptOutboundMessage, allocateBuffer, isPreferDirect, write

从类继承的方法 io.netty.channel.ChannelOutboundHandlerAdapter

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

从类继承的方法 io.netty.channel.ChannelHandlerAdapter

ensureNotSharable, exceptionCaught, handlerAdded, handlerRemoved, isSharable

从类继承的方法 java.lang.Object

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

从接口继承的方法 io.netty.channel.ChannelHandler

exceptionCaught, handlerAdded, handlerRemoved

构造器详细资料

FastLzFrameEncoder

public FastLzFrameEncoder()

Creates a FastLZ encoder without checksum calculator and with auto detection of compression level.

FastLzFrameEncoder

public FastLzFrameEncoder(int level)

Creates a FastLZ encoder with specified compression level and without checksum calculator.

参数:

level - supports only these values: 0 - Encoder will choose level automatically depending on the length of the input buffer. 1 - Level 1 is the fastest compression and generally useful for short data. 2 - Level 2 is slightly slower but it gives better compression ratio.

FastLzFrameEncoder

public FastLzFrameEncoder(boolean validateChecksums)

Creates a FastLZ encoder with auto detection of compression level and calculation of checksums as specified.

参数:

validateChecksums - If true, the checksum of each block will be calculated and this value will be added to the header of block. By default FastLzFrameEncoder uses Adler32 for checksum calculation.

FastLzFrameEncoder

public FastLzFrameEncoder(int level,
                          java.util.zip.Checksum checksum)

Creates a FastLZ encoder with specified compression level and checksum calculator.

参数:

level - supports only these values: 0 - Encoder will choose level automatically depending on the length of the input buffer. 1 - Level 1 is the fastest compression and generally useful for short data. 2 - Level 2 is slightly slower but it gives better compression ratio.

checksum - the Checksum instance to use to check data for integrity. You may set null if you don't want to validate checksum of each block.

方法详细资料

encode

protected void encode(ChannelHandlerContext ctx,
                      ByteBuf in,
                      ByteBuf out)
               throws java.lang.Exception

从类复制的说明: MessageToByteEncoder

Encode a message into a ByteBuf. This method will be called for each written message that can be handled by this encoder.

指定者:

encode 在类中 MessageToByteEncoder<ByteBuf>

参数:

ctx - the ChannelHandlerContext which this MessageToByteEncoder belongs to

in - the message to encode

out - the ByteBuf into which the encoded message will be written

抛出:

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