Module org.elasticsearch.server

Package org.elasticsearch.index.codec

Class CodecService

java.lang.Object

org.elasticsearch.index.codec.CodecService

public class CodecService
extends Object

Since Lucene 4.0 low level index segments are read and written through a codec layer that allows to use use-case specific file formats & data-structures per field. Elasticsearch exposes the full Codec capabilities through this CodecService.

Field Summary

Fields

Modifier and Type	Field	Description
static final String	BEST_COMPRESSION_CODEC
static final String	DEFAULT_CODEC
static final String	LEGACY_BEST_COMPRESSION_CODEC
static final String	LEGACY_DEFAULT_CODEC
static final String	LUCENE_DEFAULT_CODEC	the raw unfiltered lucene default.
static final FeatureFlag	ZSTD_STORED_FIELDS_FEATURE_FLAG

Constructor Summary

Constructors

Constructor	Description
CodecService(MapperService mapperService, BigArrays bigArrays)

Method Summary

Modifier and Type	Method	Description
String[]	availableCodecs()	Returns all registered available codec names
org.apache.lucene.codecs.Codec	codec(String name)

Methods inherited from class java.lang.Object

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

Field Details

ZSTD_STORED_FIELDS_FEATURE_FLAG

public static final FeatureFlag ZSTD_STORED_FIELDS_FEATURE_FLAG

DEFAULT_CODEC

public static final String DEFAULT_CODEC

See Also:

• Constant Field Values

LEGACY_DEFAULT_CODEC

public static final String LEGACY_DEFAULT_CODEC

See Also:

• Constant Field Values

BEST_COMPRESSION_CODEC

public static final String BEST_COMPRESSION_CODEC

See Also:

• Constant Field Values

LEGACY_BEST_COMPRESSION_CODEC

public static final String LEGACY_BEST_COMPRESSION_CODEC

See Also:

• Constant Field Values

LUCENE_DEFAULT_CODEC

public static final String LUCENE_DEFAULT_CODEC

the raw unfiltered lucene default. useful for testing

See Also:

• Constant Field Values

Constructor Details

CodecService

public CodecService(@Nullable
 MapperService mapperService,
 BigArrays bigArrays)

Method Details

codec

public org.apache.lucene.codecs.Codec codec(String name)

availableCodecs

public String[] availableCodecs()

Returns all registered available codec names