org.apache.cassandra.io.compress

Class CompressionParameters

java.lang.Object

org.apache.cassandra.io.compress.CompressionParameters

public class CompressionParameters
extends java.lang.Object

Field Summary

Fields

Modifier and Type	Field and Description
static java.lang.String	CHUNK_LENGTH_IN_KB
static java.lang.String	CHUNK_LENGTH_KB Deprecated.
static java.lang.String	CLASS
static java.lang.String	CRC_CHECK_CHANCE
static int	DEFAULT_CHUNK_LENGTH
static double	DEFAULT_CRC_CHECK_CHANCE
static java.lang.String	ENABLED
static java.util.Set<java.lang.String>	GLOBAL_OPTIONS
static IVersionedSerializer<CompressionParameters>	serializer
static java.lang.String	SSTABLE_COMPRESSION Deprecated.

Method Summary

Modifier and Type	Method and Description
java.util.Map<java.lang.String,java.lang.String>	asMap()
int	chunkLength()
java.lang.String	chunkLengthInKB()
static boolean	containsSstableCompressionClass(java.util.Map<java.lang.String,java.lang.String> options) Returns true if the specified options contains the name of the compression class to be used, false otherwise.
CompressionParameters	copy()
static ICompressor	createCompressor(ParameterizedClass compression)
static CompressionParameters	deflate()
static CompressionParameters	deflate(java.lang.Integer chunkLength)
boolean	equals(java.lang.Object obj)
static CompressionParameters	fromMap(java.util.Map<? extends java.lang.CharSequence,? extends java.lang.CharSequence> opts)
double	getCrcCheckChance()
com.google.common.collect.ImmutableMap<java.lang.String,java.lang.String>	getOtherOptions()
ICompressor	getSstableCompressor() Returns the SSTable compressor.
int	hashCode()
boolean	isEnabled() Checks if compression is enabled.
static boolean	isEnabled(java.util.Map<java.lang.String,java.lang.String> options) Returns true if the options contains the enabled option and that its value is true, otherwise returns false.
static CompressionParameters	lz4()
static CompressionParameters	lz4(java.lang.Integer chunkLength)
static CompressionParameters	noCompression()
void	setCrcCheckChance(double crcCheckChance)
void	setLiveMetadata(CFMetaData liveMetadata)
static CompressionParameters	snappy()
static CompressionParameters	snappy(java.lang.Integer chunkLength)
void	validate()

Methods inherited from class java.lang.Object

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

Field Detail

DEFAULT_CHUNK_LENGTH

public static final int DEFAULT_CHUNK_LENGTH

See Also:

Constant Field Values

DEFAULT_CRC_CHECK_CHANCE

public static final double DEFAULT_CRC_CHECK_CHANCE

See Also:

Constant Field Values

serializer

public static final IVersionedSerializer<CompressionParameters> serializer

CLASS

public static final java.lang.String CLASS

See Also:

Constant Field Values

CHUNK_LENGTH_IN_KB

public static final java.lang.String CHUNK_LENGTH_IN_KB

See Also:

Constant Field Values

ENABLED

public static final java.lang.String ENABLED

See Also:

Constant Field Values

SSTABLE_COMPRESSION

@Deprecated
public static final java.lang.String SSTABLE_COMPRESSION

Deprecated.

See Also:

Constant Field Values

CHUNK_LENGTH_KB

@Deprecated
public static final java.lang.String CHUNK_LENGTH_KB

Deprecated.

See Also:

Constant Field Values

CRC_CHECK_CHANCE

public static final java.lang.String CRC_CHECK_CHANCE

See Also:

Constant Field Values

GLOBAL_OPTIONS

public static final java.util.Set<java.lang.String> GLOBAL_OPTIONS

Method Detail

fromMap

public static CompressionParameters fromMap(java.util.Map<? extends java.lang.CharSequence,? extends java.lang.CharSequence> opts)

noCompression

public static CompressionParameters noCompression()

snappy

public static CompressionParameters snappy()

snappy

public static CompressionParameters snappy(java.lang.Integer chunkLength)

deflate

public static CompressionParameters deflate()

deflate

public static CompressionParameters deflate(java.lang.Integer chunkLength)

lz4

public static CompressionParameters lz4()

lz4

public static CompressionParameters lz4(java.lang.Integer chunkLength)

copy

public CompressionParameters copy()

setLiveMetadata

public void setLiveMetadata(CFMetaData liveMetadata)

setCrcCheckChance

public void setCrcCheckChance(double crcCheckChance)
                       throws ConfigurationException

Throws:

ConfigurationException

isEnabled

public boolean isEnabled()

Checks if compression is enabled.

Returns:

true if compression is enabled, false otherwise.

getSstableCompressor

public ICompressor getSstableCompressor()

Returns the SSTable compressor.

Returns:

the SSTable compressor or null if compression is disabled.

getOtherOptions

public com.google.common.collect.ImmutableMap<java.lang.String,java.lang.String> getOtherOptions()

getCrcCheckChance

public double getCrcCheckChance()

chunkLength

public int chunkLength()

createCompressor

public static ICompressor createCompressor(ParameterizedClass compression)
                                    throws ConfigurationException

Throws:

ConfigurationException

containsSstableCompressionClass

public static boolean containsSstableCompressionClass(java.util.Map<java.lang.String,java.lang.String> options)

Returns true if the specified options contains the name of the compression class to be used, false otherwise.

Parameters:

options - the options

Returns:

true if the specified options contains the name of the compression class to be used, false otherwise.

isEnabled

public static boolean isEnabled(java.util.Map<java.lang.String,java.lang.String> options)

Returns true if the options contains the enabled option and that its value is true, otherwise returns false.

Parameters:

options - the options

Returns:

true if the options contains the enabled option and that its value is true, otherwise returns false.

validate

public void validate()
              throws ConfigurationException

Throws:

ConfigurationException

asMap

public java.util.Map<java.lang.String,java.lang.String> asMap()

chunkLengthInKB

public java.lang.String chunkLengthInKB()

equals

public boolean equals(java.lang.Object obj)

Overrides:

equals in class java.lang.Object

hashCode

public int hashCode()

Overrides:

hashCode in class java.lang.Object