Package org.apache.hadoop.hbase.io.compress

Class Compression

java.lang.Object

org.apache.hadoop.hbase.io.compress.Compression

@Private
public final class Compression
extends Object

Compression related stuff. Copied from hadoop-3315 tfile.

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static enum	Compression.Algorithm	Compression algorithms.
(package private) static class	Compression.FinishOnFlushCompressionStream

Field Summary

Fields

Modifier and Type	Field	Description
static final String	BROTLI_CODEC_CLASS_DEFAULT
static final String	BROTLI_CODEC_CLASS_KEY
static final String	BZIP2_CODEC_CLASS_DEFAULT
static final String	BZIP2_CODEC_CLASS_KEY
static final String	GZ_CODEC_CLASS_DEFAULT
static final String	GZ_CODEC_CLASS_KEY
private static final org.slf4j.Logger	LOG
static final String	LZ4_CODEC_CLASS_DEFAULT
static final String	LZ4_CODEC_CLASS_KEY
static final String	LZMA_CODEC_CLASS_DEFAULT
static final String	LZMA_CODEC_CLASS_KEY
static final String	LZO_CODEC_CLASS_DEFAULT
static final String	LZO_CODEC_CLASS_KEY
static final String	SNAPPY_CODEC_CLASS_DEFAULT
static final String	SNAPPY_CODEC_CLASS_KEY
static final String	ZSTD_CODEC_CLASS_DEFAULT
static final String	ZSTD_CODEC_CLASS_KEY

Constructor Summary

Constructors

Modifier	Constructor	Description
private	Compression()	Prevent the instantiation of class.

Method Summary

Modifier and Type	Method	Description
private static org.apache.hadoop.io.compress.CompressionCodec	buildCodec(org.apache.hadoop.conf.Configuration conf, Compression.Algorithm algo)	Load a codec implementation for an algorithm using the supplied configuration.
private static ClassLoader	getClassLoaderForCodec()	Returns the classloader to load the Codec class from.
static Compression.Algorithm	getCompressionAlgorithmByName(String compressName)
static String[]	getSupportedAlgorithms()	Get names of supported compression algorithms.
static void	main(String[] args)

Methods inherited from class java.lang.Object

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

Field Details

LOG

private static final org.slf4j.Logger LOG

LZO_CODEC_CLASS_KEY

public static final String LZO_CODEC_CLASS_KEY

See Also:

• Constant Field Values

LZO_CODEC_CLASS_DEFAULT

public static final String LZO_CODEC_CLASS_DEFAULT

See Also:

• Constant Field Values

GZ_CODEC_CLASS_KEY

public static final String GZ_CODEC_CLASS_KEY

See Also:

• Constant Field Values

GZ_CODEC_CLASS_DEFAULT

public static final String GZ_CODEC_CLASS_DEFAULT

See Also:

• Constant Field Values

SNAPPY_CODEC_CLASS_KEY

public static final String SNAPPY_CODEC_CLASS_KEY

See Also:

• Constant Field Values

SNAPPY_CODEC_CLASS_DEFAULT

public static final String SNAPPY_CODEC_CLASS_DEFAULT

See Also:

• Constant Field Values

LZ4_CODEC_CLASS_KEY

public static final String LZ4_CODEC_CLASS_KEY

See Also:

• Constant Field Values

LZ4_CODEC_CLASS_DEFAULT

public static final String LZ4_CODEC_CLASS_DEFAULT

See Also:

• Constant Field Values

ZSTD_CODEC_CLASS_KEY

public static final String ZSTD_CODEC_CLASS_KEY

See Also:

• Constant Field Values

ZSTD_CODEC_CLASS_DEFAULT

public static final String ZSTD_CODEC_CLASS_DEFAULT

See Also:

• Constant Field Values

BZIP2_CODEC_CLASS_KEY

public static final String BZIP2_CODEC_CLASS_KEY

See Also:

• Constant Field Values

BZIP2_CODEC_CLASS_DEFAULT

public static final String BZIP2_CODEC_CLASS_DEFAULT

See Also:

• Constant Field Values

LZMA_CODEC_CLASS_KEY

public static final String LZMA_CODEC_CLASS_KEY

See Also:

• Constant Field Values

LZMA_CODEC_CLASS_DEFAULT

public static final String LZMA_CODEC_CLASS_DEFAULT

See Also:

• Constant Field Values

BROTLI_CODEC_CLASS_KEY

public static final String BROTLI_CODEC_CLASS_KEY

See Also:

• Constant Field Values

BROTLI_CODEC_CLASS_DEFAULT

public static final String BROTLI_CODEC_CLASS_DEFAULT

See Also:

• Constant Field Values

Constructor Details

Compression

private Compression()

Prevent the instantiation of class.

Method Details

getClassLoaderForCodec

private static ClassLoader getClassLoaderForCodec()

Returns the classloader to load the Codec class from.

getCompressionAlgorithmByName

public static Compression.Algorithm getCompressionAlgorithmByName(String compressName)

getSupportedAlgorithms

public static String[] getSupportedAlgorithms()

Get names of supported compression algorithms.

Returns:

Array of strings, each represents a supported compression algorithm. Currently, the following compression algorithms are supported.

buildCodec

private static org.apache.hadoop.io.compress.CompressionCodec buildCodec(org.apache.hadoop.conf.Configuration conf,
 Compression.Algorithm algo)

Load a codec implementation for an algorithm using the supplied configuration.

Parameters:

conf - the configuration to use

algo - the algorithm to implement

main

public static void main(String[] args)
                 throws Exception

Throws:

Exception