Module org.elasticsearch.server

Package org.elasticsearch.index.codec

Class CodecService

java.lang.Object

org.elasticsearch.index.codec.CodecService

All Implemented Interfaces:

CodecProvider

public class CodecService
extends Object
implements CodecProvider

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.

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static class	CodecService.DeduplicateFieldInfosCodec

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)

Specified by:

codec in interface CodecProvider

availableCodecs

public String[] availableCodecs()

Returns all registered available codec names.

Specified by:

availableCodecs in interface CodecProvider