Package org.apache.cassandra.io.compress

Class ZstdCompressor

java.lang.Object

org.apache.cassandra.io.compress.ZstdCompressor

All Implemented Interfaces:

ICompressor

public class ZstdCompressor
extends Object
implements ICompressor

ZSTD Compressor

Nested Class Summary

Nested classes/interfaces inherited from interface org.apache.cassandra.io.compress.ICompressor

ICompressor.Uses

Field Summary

Fields

Modifier and Type	Field	Description
static final int	BEST_COMPRESSION_LEVEL
static final String	COMPRESSION_LEVEL_OPTION_NAME
static final int	DEFAULT_COMPRESSION_LEVEL
static final int	FAST_COMPRESSION_LEVEL

Method Summary

Modifier and Type	Method	Description
void	compress(ByteBuffer input, ByteBuffer output)	Compress using ByteBuffers
static ZstdCompressor	create(Map<String,String> options)	Create a Zstd compressor with the given options
int	getCompressionLevel()
static ZstdCompressor	getOrCreate(int level)	Get a cached instance or return a new one
int	initialCompressedBufferLength(int chunkLength)	Get initial compressed buffer length
BufferType	preferredBufferType()	Return the preferred BufferType
Set<ICompressor.Uses>	recommendedUses()	Hints to Cassandra which uses this compressor is recommended for.
Set<String>	supportedOptions()	Lists the supported options by this compressor
boolean	supports(BufferType bufferType)	Check whether the given BufferType is supported
int	uncompress(byte[] input, int inputOffset, int inputLength, byte[] output, int outputOffset)	Decompress data using arrays
void	uncompress(ByteBuffer input, ByteBuffer output)	Decompress data via ByteBuffers

Methods inherited from class java.lang.Object

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

Field Details

FAST_COMPRESSION_LEVEL

public static final int FAST_COMPRESSION_LEVEL

BEST_COMPRESSION_LEVEL

public static final int BEST_COMPRESSION_LEVEL

DEFAULT_COMPRESSION_LEVEL

public static final int DEFAULT_COMPRESSION_LEVEL

See Also:

• Constant Field Values

COMPRESSION_LEVEL_OPTION_NAME

public static final String COMPRESSION_LEVEL_OPTION_NAME

See Also:

• Constant Field Values

Method Details

create

public static ZstdCompressor create(Map<String,String> options)

Create a Zstd compressor with the given options

Parameters:

options -

Returns:

getOrCreate

public static ZstdCompressor getOrCreate(int level)

Get a cached instance or return a new one

Parameters:

level -

Returns:

initialCompressedBufferLength

public int initialCompressedBufferLength(int chunkLength)

Get initial compressed buffer length

Specified by:

initialCompressedBufferLength in interface ICompressor

Parameters:

chunkLength -

Returns:

uncompress

public int uncompress(byte[] input,
 int inputOffset,
 int inputLength,
 byte[] output,
 int outputOffset)
               throws IOException

Decompress data using arrays

Specified by:

uncompress in interface ICompressor

Parameters:

input -

inputOffset -

inputLength -

output -

outputOffset -

Returns:

Throws:

IOException

uncompress

public void uncompress(ByteBuffer input,
 ByteBuffer output)
                throws IOException

Decompress data via ByteBuffers

Specified by:

uncompress in interface ICompressor

Parameters:

input -

output -

Throws:

IOException

compress

public void compress(ByteBuffer input,
 ByteBuffer output)
              throws IOException

Compress using ByteBuffers

Specified by:

compress in interface ICompressor

Parameters:

input -

output -

Throws:

IOException

preferredBufferType

public BufferType preferredBufferType()

Return the preferred BufferType

Specified by:

preferredBufferType in interface ICompressor

Returns:

supports

public boolean supports(BufferType bufferType)

Check whether the given BufferType is supported

Specified by:

supports in interface ICompressor

Parameters:

bufferType -

Returns:

supportedOptions

public Set<String> supportedOptions()

Lists the supported options by this compressor

Specified by:

supportedOptions in interface ICompressor

Returns:

getCompressionLevel

public int getCompressionLevel()

recommendedUses

public Set<ICompressor.Uses> recommendedUses()

Description copied from interface: ICompressor

Hints to Cassandra which uses this compressor is recommended for. For example a compression algorithm which gets good compression ratio may trade off too much compression speed to be useful in certain compression heavy use cases such as flushes or mutation hints. Note that Cassandra may ignore these recommendations, it is not a strict contract.

Specified by:

recommendedUses in interface ICompressor