io.netty.handler.codec.compression

类 StandardCompressionOptions

java.lang.Object

io.netty.handler.codec.compression.StandardCompressionOptions

public final class StandardCompressionOptions
extends java.lang.Object

Standard Compression Options for BrotliOptions, GzipOptions and DeflateOptions

方法概要

限定符和类型	方法和说明
static BrotliOptions	brotli() Default implementation of BrotliOptions with Encoder.Parameters#setQuality(int) set to 4 and Encoder.Parameters#setMode(Encoder.Mode) set to Encoder.Mode#TEXT
static BrotliOptions	brotli(Encoder.Parameters parameters) Create a new BrotliOptions
static DeflateOptions	deflate() Default implementation of DeflateOptions with compressionLevel set to 6, windowBits set to 15 and memLevel set to 8.
static DeflateOptions	deflate(int compressionLevel, int windowBits, int memLevel) Create a new DeflateOptions Instance
static GzipOptions	gzip() Default implementation of GzipOptions with compressionLevel() set to 6, windowBits() set to 15 and memLevel() set to 8.
static GzipOptions	gzip(int compressionLevel, int windowBits, int memLevel) Create a new GzipOptions Instance
static SnappyOptions	snappy() Create a new SnappyOptions
static ZstdOptions	zstd() Default implementation of ZstdOptions with{compressionLevel(int)} set to ZstdConstants.DEFAULT_COMPRESSION_LEVEL,ZstdConstants.DEFAULT_BLOCK_SIZE, ZstdConstants.MAX_BLOCK_SIZE
static ZstdOptions	zstd(int compressionLevel, int blockSize, int maxEncodeSize) Create a new ZstdOptions

从类继承的方法 java.lang.Object

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

方法详细资料

brotli

public static BrotliOptions brotli()

Default implementation of BrotliOptions with Encoder.Parameters#setQuality(int) set to 4 and Encoder.Parameters#setMode(Encoder.Mode) set to Encoder.Mode#TEXT

brotli

public static BrotliOptions brotli(Encoder.Parameters parameters)

Create a new BrotliOptions

参数:

parameters - Encoder.Parameters Instance

抛出:

java.lang.NullPointerException - If Encoder.Parameters is null

zstd

public static ZstdOptions zstd()

Default implementation of ZstdOptions with{compressionLevel(int)} set to ZstdConstants.DEFAULT_COMPRESSION_LEVEL,ZstdConstants.DEFAULT_BLOCK_SIZE, ZstdConstants.MAX_BLOCK_SIZE

zstd

public static ZstdOptions zstd(int compressionLevel,
                               int blockSize,
                               int maxEncodeSize)

Create a new ZstdOptions

参数:

blockSize - is used to calculate the compressionLevel

maxEncodeSize - specifies the size of the largest compressed object

compressionLevel - specifies the level of the compression

snappy

public static SnappyOptions snappy()

Create a new SnappyOptions

gzip

public static GzipOptions gzip()

Default implementation of GzipOptions with compressionLevel() set to 6, windowBits() set to 15 and memLevel() set to 8.

gzip

public static GzipOptions gzip(int compressionLevel,
                               int windowBits,
                               int memLevel)

Create a new GzipOptions Instance

参数:

compressionLevel - 1 yields the fastest compression and 9 yields the best compression. 0 means no compression. The default compression level is 6.

windowBits - The base two logarithm of the size of the history buffer. The value should be in the range 9 to 15 inclusive. Larger values result in better compression at the expense of memory usage. The default value is 15.

memLevel - How much memory should be allocated for the internal compression state. 1 uses minimum memory and 9 uses maximum memory. Larger values result in better and faster compression at the expense of memory usage. The default value is 8

deflate

public static DeflateOptions deflate()

Default implementation of DeflateOptions with compressionLevel set to 6, windowBits set to 15 and memLevel set to 8.

deflate

public static DeflateOptions deflate(int compressionLevel,
                                     int windowBits,
                                     int memLevel)

Create a new DeflateOptions Instance

参数:

compressionLevel - 1 yields the fastest compression and 9 yields the best compression. 0 means no compression. The default compression level is 6.

windowBits - The base two logarithm of the size of the history buffer. The value should be in the range 9 to 15 inclusive. Larger values result in better compression at the expense of memory usage. The default value is 15.

memLevel - How much memory should be allocated for the internal compression state. 1 uses minimum memory and 9 uses maximum memory. Larger values result in better and faster compression at the expense of memory usage. The default value is 8