org.elasticsearch.common.lucene

Class Lucene

java.lang.Object

org.elasticsearch.common.lucene.Lucene

public class Lucene
extends java.lang.Object

Field Summary

Fields

Modifier and Type	Field and Description
static org.apache.lucene.search.ScoreDoc[]	EMPTY_SCORE_DOCS
static org.apache.lucene.search.TopDocs	EMPTY_TOP_DOCS
static NamedAnalyzer	KEYWORD_ANALYZER
static java.lang.String	LATEST_CODEC
static java.lang.String	LATEST_DOC_VALUES_FORMAT
static java.lang.String	LATEST_POSTINGS_FORMAT
static NamedAnalyzer	STANDARD_ANALYZER

Method Summary

Modifier and Type	Method and Description
static org.apache.lucene.util.Bits	asSequentialAccessBits(int maxDoc, org.apache.lucene.search.ScorerSupplier scorerSupplier) Given a ScorerSupplier, return a Bits instance that will match all documents contained in the set.
static void	checkSegmentInfoIntegrity(org.apache.lucene.store.Directory directory)
static void	cleanLuceneIndex(org.apache.lucene.store.Directory directory) This method removes all lucene files from the given directory.
static boolean	exists(org.apache.lucene.search.IndexSearcher searcher, org.apache.lucene.search.Query query) Check whether there is one or more documents matching the provided query.
static java.lang.Iterable<java.lang.String>	files(org.apache.lucene.index.SegmentInfos infos) Returns an iterable that allows to iterate over all files in this segments info
static int	getNumDocs(org.apache.lucene.index.SegmentInfos info) Returns the number of documents in the index referenced by this SegmentInfos
static org.apache.lucene.search.Scorer	illegalScorer(java.lang.String message) Return a Scorer that throws an ElasticsearchIllegalStateException on all operations with the given message.
static boolean	indexExists(org.apache.lucene.store.Directory directory)
static boolean	isCorruptionException(java.lang.Throwable t) Returns true iff the given exception or one of it's causes is an instance of CorruptIndexException, IndexFormatTooOldException, or IndexFormatTooNewException otherwise false.
static org.apache.lucene.util.Version	parseVersion(java.lang.String version, org.apache.lucene.util.Version defaultVersion, org.apache.logging.log4j.Logger logger)
static org.apache.lucene.util.Version	parseVersionLenient(java.lang.String toParse, org.apache.lucene.util.Version defaultValue) Parses the version string lenient and returns the default value if the given string is null or empty
static org.apache.lucene.index.SegmentInfos	pruneUnreferencedFiles(java.lang.String segmentsFileName, org.apache.lucene.store.Directory directory) This method removes all files from the given directory that are not referenced by the given segments file.
static org.apache.lucene.search.Explanation	readExplanation(StreamInput in)
static org.apache.lucene.search.FieldDoc	readFieldDoc(StreamInput in)
static org.apache.lucene.search.ScoreDoc	readScoreDoc(StreamInput in)
static org.apache.lucene.index.SegmentInfos	readSegmentInfos(org.apache.lucene.store.Directory directory) Reads the segments infos, failing if it fails to load
static org.apache.lucene.index.SegmentInfos	readSegmentInfos(org.apache.lucene.index.IndexCommit commit) Reads the segments infos from the given commit, failing if it fails to load
static org.apache.lucene.search.SortField	readSortField(StreamInput in)
static org.apache.lucene.search.SortField.Type	readSortType(StreamInput in)
static org.apache.lucene.search.TopDocs	readTopDocs(StreamInput in)
static org.apache.lucene.index.SegmentReader	segmentReader(org.apache.lucene.index.LeafReader reader) Tries to extract a segment reader from the given index reader.
static boolean	waitForIndex(org.apache.lucene.store.Directory directory, long timeLimitMillis) Wait for an index to exist for up to timeLimitMillis.
static void	writeExplanation(StreamOutput out, org.apache.lucene.search.Explanation explanation)
static void	writeFieldDoc(StreamOutput out, org.apache.lucene.search.FieldDoc fieldDoc)
static void	writeScoreDoc(StreamOutput out, org.apache.lucene.search.ScoreDoc scoreDoc)
static void	writeSortField(StreamOutput out, org.apache.lucene.search.SortField sortField)
static void	writeSortType(StreamOutput out, org.apache.lucene.search.SortField.Type sortType)
static void	writeTopDocs(StreamOutput out, org.apache.lucene.search.TopDocs topDocs)

Methods inherited from class java.lang.Object

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

Field Detail

LATEST_DOC_VALUES_FORMAT

public static final java.lang.String LATEST_DOC_VALUES_FORMAT

See Also:

Constant Field Values

LATEST_POSTINGS_FORMAT

public static final java.lang.String LATEST_POSTINGS_FORMAT

See Also:

Constant Field Values

LATEST_CODEC

public static final java.lang.String LATEST_CODEC

See Also:

Constant Field Values

STANDARD_ANALYZER

public static final NamedAnalyzer STANDARD_ANALYZER

KEYWORD_ANALYZER

public static final NamedAnalyzer KEYWORD_ANALYZER

EMPTY_SCORE_DOCS

public static final org.apache.lucene.search.ScoreDoc[] EMPTY_SCORE_DOCS

EMPTY_TOP_DOCS

public static final org.apache.lucene.search.TopDocs EMPTY_TOP_DOCS

Method Detail

parseVersion

public static org.apache.lucene.util.Version parseVersion(@Nullable
                                                          java.lang.String version,
                                                          org.apache.lucene.util.Version defaultVersion,
                                                          org.apache.logging.log4j.Logger logger)

readSegmentInfos

public static org.apache.lucene.index.SegmentInfos readSegmentInfos(org.apache.lucene.store.Directory directory)
                                                             throws java.io.IOException

Reads the segments infos, failing if it fails to load

Throws:

java.io.IOException

files

public static java.lang.Iterable<java.lang.String> files(org.apache.lucene.index.SegmentInfos infos)
                                                  throws java.io.IOException

Returns an iterable that allows to iterate over all files in this segments info

Throws:

java.io.IOException

getNumDocs

public static int getNumDocs(org.apache.lucene.index.SegmentInfos info)

Returns the number of documents in the index referenced by this SegmentInfos

readSegmentInfos

public static org.apache.lucene.index.SegmentInfos readSegmentInfos(org.apache.lucene.index.IndexCommit commit)
                                                             throws java.io.IOException

Reads the segments infos from the given commit, failing if it fails to load

Throws:

java.io.IOException

pruneUnreferencedFiles

public static org.apache.lucene.index.SegmentInfos pruneUnreferencedFiles(java.lang.String segmentsFileName,
                                                                          org.apache.lucene.store.Directory directory)
                                                                   throws java.io.IOException

This method removes all files from the given directory that are not referenced by the given segments file. This method will open an IndexWriter and relies on index file deleter to remove all unreferenced files. Segment files that are newer than the given segments file are removed forcefully to prevent problems with IndexWriter opening a potentially broken commit point / leftover. Note: this method will fail if there is another IndexWriter open on the given directory. This method will also acquire a write lock from the directory while pruning unused files. This method expects an existing index in the given directory that has the given segments file.

Throws:

java.io.IOException

cleanLuceneIndex

public static void cleanLuceneIndex(org.apache.lucene.store.Directory directory)
                             throws java.io.IOException

This method removes all lucene files from the given directory. It will first try to delete all commit points / segments files to ensure broken commits or corrupted indices will not be opened in the future. If any of the segment files can't be deleted this operation fails.

Throws:

java.io.IOException

checkSegmentInfoIntegrity

public static void checkSegmentInfoIntegrity(org.apache.lucene.store.Directory directory)
                                      throws java.io.IOException

Throws:

java.io.IOException

exists

public static boolean exists(org.apache.lucene.search.IndexSearcher searcher,
                             org.apache.lucene.search.Query query)
                      throws java.io.IOException

Check whether there is one or more documents matching the provided query.

Throws:

java.io.IOException

readTopDocs

public static org.apache.lucene.search.TopDocs readTopDocs(StreamInput in)
                                                    throws java.io.IOException

Throws:

java.io.IOException

readFieldDoc

public static org.apache.lucene.search.FieldDoc readFieldDoc(StreamInput in)
                                                      throws java.io.IOException

Throws:

java.io.IOException

readScoreDoc

public static org.apache.lucene.search.ScoreDoc readScoreDoc(StreamInput in)
                                                      throws java.io.IOException

Throws:

java.io.IOException

writeTopDocs

public static void writeTopDocs(StreamOutput out,
                                org.apache.lucene.search.TopDocs topDocs)
                         throws java.io.IOException

Throws:

java.io.IOException

writeFieldDoc

public static void writeFieldDoc(StreamOutput out,
                                 org.apache.lucene.search.FieldDoc fieldDoc)
                          throws java.io.IOException

Throws:

java.io.IOException

writeScoreDoc

public static void writeScoreDoc(StreamOutput out,
                                 org.apache.lucene.search.ScoreDoc scoreDoc)
                          throws java.io.IOException

Throws:

java.io.IOException

readSortType

public static org.apache.lucene.search.SortField.Type readSortType(StreamInput in)
                                                            throws java.io.IOException

Throws:

java.io.IOException

readSortField

public static org.apache.lucene.search.SortField readSortField(StreamInput in)
                                                        throws java.io.IOException

Throws:

java.io.IOException

writeSortType

public static void writeSortType(StreamOutput out,
                                 org.apache.lucene.search.SortField.Type sortType)
                          throws java.io.IOException

Throws:

java.io.IOException

writeSortField

public static void writeSortField(StreamOutput out,
                                  org.apache.lucene.search.SortField sortField)
                           throws java.io.IOException

Throws:

java.io.IOException

readExplanation

public static org.apache.lucene.search.Explanation readExplanation(StreamInput in)
                                                            throws java.io.IOException

Throws:

java.io.IOException

writeExplanation

public static void writeExplanation(StreamOutput out,
                                    org.apache.lucene.search.Explanation explanation)
                             throws java.io.IOException

Throws:

java.io.IOException

indexExists

public static final boolean indexExists(org.apache.lucene.store.Directory directory)
                                 throws java.io.IOException

Throws:

java.io.IOException

waitForIndex

public static final boolean waitForIndex(org.apache.lucene.store.Directory directory,
                                         long timeLimitMillis)
                                  throws java.io.IOException

Wait for an index to exist for up to timeLimitMillis. Returns true if the index eventually exists, false if not. Will retry the directory every second for at least timeLimitMillis

Throws:

java.io.IOException

isCorruptionException

public static boolean isCorruptionException(java.lang.Throwable t)

Returns true iff the given exception or one of it's causes is an instance of CorruptIndexException, IndexFormatTooOldException, or IndexFormatTooNewException otherwise false.

parseVersionLenient

public static org.apache.lucene.util.Version parseVersionLenient(java.lang.String toParse,
                                                                 org.apache.lucene.util.Version defaultValue)

Parses the version string lenient and returns the default value if the given string is null or empty

segmentReader

public static org.apache.lucene.index.SegmentReader segmentReader(org.apache.lucene.index.LeafReader reader)

Tries to extract a segment reader from the given index reader. If no SegmentReader can be extracted an IllegalStateException is thrown.

illegalScorer

public static org.apache.lucene.search.Scorer illegalScorer(java.lang.String message)

Return a Scorer that throws an ElasticsearchIllegalStateException on all operations with the given message.

asSequentialAccessBits

public static org.apache.lucene.util.Bits asSequentialAccessBits(int maxDoc,
                                                                 @Nullable
                                                                 org.apache.lucene.search.ScorerSupplier scorerSupplier)
                                                          throws java.io.IOException

Given a ScorerSupplier, return a Bits instance that will match all documents contained in the set. Note that the returned Bits instance MUST be consumed in order.

Throws:

java.io.IOException