org.apache.solr.search

Class SolrIndexSearcher

java.lang.Object

org.apache.lucene.search.IndexSearcher

org.apache.solr.search.SolrIndexSearcher

All Implemented Interfaces:

Closeable, SolrInfoMBean

public class SolrIndexSearcher
extends IndexSearcher
implements Closeable, SolrInfoMBean

SolrIndexSearcher adds schema awareness and caching functionality over the lucene IndexSearcher.

Since:

solr 0.9

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	SolrIndexSearcher.DocsEnumState
static class	SolrIndexSearcher.ProcessedFilter
static class	SolrIndexSearcher.QueryCommand A query request command to avoid having to change the method signatures if we want to pass additional information to the searcher.
static class	SolrIndexSearcher.QueryResult The result of a search.

Nested classes/interfaces inherited from class org.apache.lucene.search.IndexSearcher

IndexSearcher.LeafSlice

Nested classes/interfaces inherited from interface org.apache.solr.core.SolrInfoMBean

SolrInfoMBean.Category

Field Summary

Fields

Modifier and Type	Field and Description
boolean	enableLazyFieldLoading
static int	GET_DOCLIST
static int	GET_DOCSET
static int	GET_SCORES
static AtomicLong	numCloses
static AtomicLong	numOpens

Fields inherited from class org.apache.lucene.search.IndexSearcher

leafContexts, leafSlices, readerContext

Constructor Summary

Constructors

Constructor and Description
SolrIndexSearcher(SolrCore core, IndexSchema schema, String name, DirectoryReader r, boolean closeReader, boolean enableCache, boolean reserveDirectory, DirectoryFactory directoryFactory)
SolrIndexSearcher(SolrCore core, String path, IndexSchema schema, SolrIndexConfig config, String name, boolean enableCache, DirectoryFactory directoryFactory)

Method Summary

Methods

Modifier and Type	Method and Description
void	cacheDocSet(Query query, DocSet optionalAnswer, boolean mustCache) Compute and cache the DocSet that matches a query.
Object	cacheInsert(String cacheName, Object key, Object val) insert an entry in a generic cache
Object	cacheLookup(String cacheName, Object key) lookup an entry in a generic cache
void	close() Free's resources associated with this searcher.
Document	doc(int i) Retrieve the Document instance corresponding to the document id.
Document	doc(int i, Set<String> fields) Retrieve the Document instance corresponding to the document id.
void	doc(int n, StoredFieldVisitor visitor) Visit a document's fields using a StoredFieldVisitor This method does not currently add to the Solr document cache.
int	docFreq(Term term)
Explanation	explain(Query query, int doc)
AtomicReader	getAtomicReader()
SolrCache	getCache(String cacheName) return the named generic cache
SolrInfoMBean.Category	getCategory() Purpose of this Class
SolrCore	getCore()
String	getDescription() Simple one or two line description
DocList	getDocList(Query query, DocSet filter, Sort lsort, int offset, int len) Returns documents matching both query and filter and sorted by sort.
DocList	getDocList(Query query, List<Query> filterList, Sort lsort, int offset, int len, int flags) Returns documents matching both query and the intersection of the filterList, sorted by sort.
DocList	getDocList(Query query, Query filter, Sort lsort, int offset, int len) Returns documents matching both query and filter and sorted by sort.
DocListAndSet	getDocListAndSet(Query query, DocSet filter, Sort lsort, int offset, int len) Returns documents matching both query and filter and sorted by sort.
DocListAndSet	getDocListAndSet(Query query, DocSet filter, Sort lsort, int offset, int len, int flags) Returns documents matching both query and filter and sorted by sort.
DocListAndSet	getDocListAndSet(Query query, List<Query> filterList, Sort lsort, int offset, int len) Returns documents matching both query and the intersection of filterList, sorted by sort.
DocListAndSet	getDocListAndSet(Query query, List<Query> filterList, Sort lsort, int offset, int len, int flags) Returns documents matching both query and the intersection of filterList, sorted by sort.
DocListAndSet	getDocListAndSet(Query query, Query filter, Sort lsort, int offset, int len) Returns documents matching both query and filter and sorted by sort.
DocListAndSet	getDocListAndSet(Query query, Query filter, Sort lsort, int offset, int len, int flags) Returns documents matching both query and filter and sorted by sort.
URL[]	getDocs() Documentation URL list.
DocSet	getDocSet(List<Query> queries) Returns the set of document ids matching all queries.
DocSet	getDocSet(Query query) Returns the set of document ids matching a query.
DocSet	getDocSet(Query query, DocSet filter) Returns the set of document ids matching both the query and the filter.
DocSet	getDocSet(SolrIndexSearcher.DocsEnumState deState) lucene.internal
protected DocSet	getDocSetNC(Query query, DocSet filter)
Collection<String>	getFieldNames() Returns a collection of all field names the index reader knows about.
SolrCache<String,UnInvertedField>	getFieldValueCache() expert: internal API, subject to change
int	getFirstMatch(Term t) Returns the first document number containing the term t Returns -1 if no document was found.
DirectoryReader	getIndexReader()
String	getName() Simple common usage name, e.g.
long	getOpenTime()
SolrIndexSearcher.ProcessedFilter	getProcessedFilter(DocSet setFilter, List<Query> queries)
IndexSchema	getSchema() Direct access to the IndexSchema for use with this searcher
String	getSource() CVS Source, SVN Source, etc
NamedList<Object>	getStatistics() Any statistics this instance would like to be publicly available via the Solr Administration interface.
Collection<String>	getStoredHighlightFieldNames() Returns a collection of the names of all stored fields which can be highlighted the index reader knows about.
String	getVersion() Simple common usage version, e.g.
static void	initRegenerators(SolrConfig solrConfig)
long	lookupId(BytesRef idBytes) lookup the docid by the unique key field, and return the id *within* the leaf reader in the low 32 bits, and the index of the leaf reader in the high 32 bits.
int	maxDoc()
int	numDocs(DocSet a, SolrIndexSearcher.DocsEnumState deState)
int	numDocs(Query a, DocSet b) Returns the number of documents that match both a and b.
int	numDocs(Query a, Query b) Returns the number of documents that match both a and b.
Document[]	readDocs(DocList ids) Takes a list of docs (the doc ids actually), and returns an array of Documents containing all of the stored fields.
void	readDocs(Document[] docs, DocList ids) Takes a list of docs (the doc ids actually), and reads them into an array of Documents.
void	readDocs(Document[] docs, DocList ids, Set<String> fields) Takes a list of docs (the doc ids actually) and a set of fields to load, and reads them into an array of Documents.
void	register() Register sub-objects such as caches
SolrIndexSearcher.QueryResult	search(SolrIndexSearcher.QueryResult qr, SolrIndexSearcher.QueryCommand cmd)
protected DocList	sortDocSet(DocSet set, Sort sort, int nDocs)
String	toString()
void	warm(SolrIndexSearcher old) Warm this searcher based on an old one (primarily for auto-cache warming).
Sort	weightSort(Sort sort) Returns a weighted sort according to this searcher

Methods inherited from class org.apache.lucene.search.IndexSearcher

collectionStatistics, createNormalizedWeight, document, explain, getDefaultSimilarity, getSimilarity, getTopReaderContext, rewrite, search, search, search, search, search, search, search, search, search, search, search, search, search, searchAfter, searchAfter, searchAfter, searchAfter, searchAfter, setSimilarity, slices, termStatistics, wrapFilter

Methods inherited from class java.lang.Object

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

Field Detail

numOpens

public static final AtomicLong numOpens

numCloses

public static final AtomicLong numCloses

enableLazyFieldLoading

public final boolean enableLazyFieldLoading

GET_DOCSET

public static final int GET_DOCSET

See Also:

Constant Field Values

GET_DOCLIST

public static final int GET_DOCLIST

See Also:

Constant Field Values

GET_SCORES

public static final int GET_SCORES

See Also:

Constant Field Values

Constructor Detail

SolrIndexSearcher

public SolrIndexSearcher(SolrCore core,
                 String path,
                 IndexSchema schema,
                 SolrIndexConfig config,
                 String name,
                 boolean enableCache,
                 DirectoryFactory directoryFactory)
                  throws IOException

Throws:

IOException

SolrIndexSearcher

public SolrIndexSearcher(SolrCore core,
                 IndexSchema schema,
                 String name,
                 DirectoryReader r,
                 boolean closeReader,
                 boolean enableCache,
                 boolean reserveDirectory,
                 DirectoryFactory directoryFactory)
                  throws IOException

Throws:

IOException

Method Detail

toString

public String toString()

Overrides:

toString in class IndexSearcher

getCore

public SolrCore getCore()

maxDoc

public final int maxDoc()

docFreq

public final int docFreq(Term term)
                  throws IOException

Throws:

IOException

getAtomicReader

public final AtomicReader getAtomicReader()

getIndexReader

public final DirectoryReader getIndexReader()

Overrides:

getIndexReader in class IndexSearcher

register

public void register()

Register sub-objects such as caches

close

public void close()
           throws IOException

Free's resources associated with this searcher. In particular, the underlying reader and any cache's in use are closed.

Specified by:

close in interface Closeable

Throws:

IOException

getSchema

public IndexSchema getSchema()

Direct access to the IndexSchema for use with this searcher

getFieldNames

public Collection<String> getFieldNames()

Returns a collection of all field names the index reader knows about.

getStoredHighlightFieldNames

public Collection<String> getStoredHighlightFieldNames()

Returns a collection of the names of all stored fields which can be highlighted the index reader knows about.

initRegenerators

public static void initRegenerators(SolrConfig solrConfig)

search

public SolrIndexSearcher.QueryResult search(SolrIndexSearcher.QueryResult qr,
                                   SolrIndexSearcher.QueryCommand cmd)
                                     throws IOException

Throws:

IOException

doc

public Document doc(int i)
             throws IOException

Retrieve the Document instance corresponding to the document id.

Overrides:

doc in class IndexSearcher

Throws:

IOException

doc

public void doc(int n,
       StoredFieldVisitor visitor)
         throws IOException

Visit a document's fields using a StoredFieldVisitor This method does not currently add to the Solr document cache.

Overrides:

doc in class IndexSearcher

Throws:

IOException

See Also:

IndexReader.document(int, StoredFieldVisitor)

doc

public Document doc(int i,
           Set<String> fields)
             throws IOException

Retrieve the Document instance corresponding to the document id.

Note: The document will have all fields accessible, but if a field filter is provided, only the provided fields will be loaded (the remainder will be available lazily).

Overrides:

doc in class IndexSearcher

Throws:

IOException

readDocs

public void readDocs(Document[] docs,
            DocList ids)
              throws IOException

Takes a list of docs (the doc ids actually), and reads them into an array of Documents.

Throws:

IOException

readDocs

public void readDocs(Document[] docs,
            DocList ids,
            Set<String> fields)
              throws IOException

Takes a list of docs (the doc ids actually) and a set of fields to load, and reads them into an array of Documents.

Throws:

IOException

getFieldValueCache

public SolrCache<String,UnInvertedField> getFieldValueCache()

expert: internal API, subject to change

weightSort

public Sort weightSort(Sort sort)
                throws IOException

Returns a weighted sort according to this searcher

Throws:

IOException

getFirstMatch

public int getFirstMatch(Term t)
                  throws IOException

Returns the first document number containing the term t Returns -1 if no document was found. This method is primarily intended for clients that want to fetch documents using a unique identifier."

Returns:

the first document number containing the term

Throws:

IOException

lookupId

public long lookupId(BytesRef idBytes)
              throws IOException

lookup the docid by the unique key field, and return the id *within* the leaf reader in the low 32 bits, and the index of the leaf reader in the high 32 bits. -1 is returned if not found.

Throws:

IOException

NOTE: This API is for internal purposes only and might change in incompatible ways in the next release.

cacheDocSet

public void cacheDocSet(Query query,
               DocSet optionalAnswer,
               boolean mustCache)
                 throws IOException

Compute and cache the DocSet that matches a query. The normal usage is expected to be cacheDocSet(myQuery, null,false) meaning that Solr will determine if the Query warrants caching, and if so, will compute the DocSet that matches the Query and cache it. If the answer to the query is already cached, nothing further will be done.

If the optionalAnswer DocSet is provided, it should *not* be modified after this call.

Parameters:

query - the lucene query that will act as the key

optionalAnswer - the DocSet to be cached - if null, it will be computed.

mustCache - if true, a best effort will be made to cache this entry. if false, heuristics may be used to determine if it should be cached.

Throws:

IOException

getDocSet

public DocSet getDocSet(Query query)
                 throws IOException

Returns the set of document ids matching a query. This method is cache-aware and attempts to retrieve the answer from the cache if possible. If the answer was not cached, it may have been inserted into the cache as a result of this call. This method can handle negative queries.

The DocSet returned should not be modified.

Throws:

IOException

getDocSet

public DocSet getDocSet(List<Query> queries)
                 throws IOException

Returns the set of document ids matching all queries. This method is cache-aware and attempts to retrieve the answer from the cache if possible. If the answer was not cached, it may have been inserted into the cache as a result of this call. This method can handle negative queries.

The DocSet returned should not be modified.

Throws:

IOException

getProcessedFilter

public SolrIndexSearcher.ProcessedFilter getProcessedFilter(DocSet setFilter,
                                                   List<Query> queries)
                                                     throws IOException

Throws:

IOException

getDocSet

public DocSet getDocSet(SolrIndexSearcher.DocsEnumState deState)
                 throws IOException

lucene.internal

Throws:

IOException

getDocSetNC

protected DocSet getDocSetNC(Query query,
                 DocSet filter)
                      throws IOException

Throws:

IOException

getDocSet

public DocSet getDocSet(Query query,
               DocSet filter)
                 throws IOException

Returns the set of document ids matching both the query and the filter. This method is cache-aware and attempts to retrieve the answer from the cache if possible. If the answer was not cached, it may have been inserted into the cache as a result of this call.

Parameters:

filter - may be null

Returns:

DocSet meeting the specified criteria, should not be modified by the caller.

Throws:

IOException

getDocList

public DocList getDocList(Query query,
                 Query filter,
                 Sort lsort,
                 int offset,
                 int len)
                   throws IOException

Returns documents matching both query and filter and sorted by sort.

This method is cache aware and may retrieve filter from the cache or make an insertion into the cache as a result of this call.

FUTURE: The returned DocList may be retrieved from a cache.

Parameters:

filter - may be null

lsort - criteria by which to sort (if null, query relevance is used)

offset - offset into the list of documents to return

len - maximum number of documents to return

Returns:

DocList meeting the specified criteria, should not be modified by the caller.

Throws:

IOException - If there is a low-level I/O error.

getDocList

public DocList getDocList(Query query,
                 List<Query> filterList,
                 Sort lsort,
                 int offset,
                 int len,
                 int flags)
                   throws IOException

Returns documents matching both query and the intersection of the filterList, sorted by sort.

This method is cache aware and may retrieve filter from the cache or make an insertion into the cache as a result of this call.

FUTURE: The returned DocList may be retrieved from a cache.

Parameters:

filterList - may be null

lsort - criteria by which to sort (if null, query relevance is used)

offset - offset into the list of documents to return

len - maximum number of documents to return

Returns:

DocList meeting the specified criteria, should not be modified by the caller.

Throws:

IOException - If there is a low-level I/O error.

getDocList

public DocList getDocList(Query query,
                 DocSet filter,
                 Sort lsort,
                 int offset,
                 int len)
                   throws IOException

Returns documents matching both query and filter and sorted by sort. FUTURE: The returned DocList may be retrieved from a cache.

Parameters:

filter - may be null

lsort - criteria by which to sort (if null, query relevance is used)

offset - offset into the list of documents to return

len - maximum number of documents to return

Returns:

DocList meeting the specified criteria, should not be modified by the caller.

Throws:

IOException - If there is a low-level I/O error.

getDocListAndSet

public DocListAndSet getDocListAndSet(Query query,
                             Query filter,
                             Sort lsort,
                             int offset,
                             int len)
                               throws IOException

Returns documents matching both query and filter and sorted by sort. Also returns the complete set of documents matching query and filter (regardless of offset and len).

This method is cache aware and may retrieve filter from the cache or make an insertion into the cache as a result of this call.

FUTURE: The returned DocList may be retrieved from a cache.

The DocList and DocSet returned should not be modified.

Parameters:

filter - may be null

lsort - criteria by which to sort (if null, query relevance is used)

offset - offset into the list of documents to return

len - maximum number of documents to return

Returns:

DocListAndSet meeting the specified criteria, should not be modified by the caller.

Throws:

IOException - If there is a low-level I/O error.

getDocListAndSet

public DocListAndSet getDocListAndSet(Query query,
                             Query filter,
                             Sort lsort,
                             int offset,
                             int len,
                             int flags)
                               throws IOException

Returns documents matching both query and filter and sorted by sort. Also returns the compete set of documents matching query and filter (regardless of offset and len).

This method is cache aware and may retrieve filter from the cache or make an insertion into the cache as a result of this call.

FUTURE: The returned DocList may be retrieved from a cache.

The DocList and DocSet returned should not be modified.

Parameters:

filter - may be null

lsort - criteria by which to sort (if null, query relevance is used)

offset - offset into the list of documents to return

len - maximum number of documents to return

flags - user supplied flags for the result set

Returns:

DocListAndSet meeting the specified criteria, should not be modified by the caller.

Throws:

IOException - If there is a low-level I/O error.

getDocListAndSet

public DocListAndSet getDocListAndSet(Query query,
                             List<Query> filterList,
                             Sort lsort,
                             int offset,
                             int len)
                               throws IOException

Returns documents matching both query and the intersection of filterList, sorted by sort. Also returns the compete set of documents matching query and filter (regardless of offset and len).

This method is cache aware and may retrieve filter from the cache or make an insertion into the cache as a result of this call.

FUTURE: The returned DocList may be retrieved from a cache.

The DocList and DocSet returned should not be modified.

Parameters:

filterList - may be null

lsort - criteria by which to sort (if null, query relevance is used)

offset - offset into the list of documents to return

len - maximum number of documents to return

Returns:

DocListAndSet meeting the specified criteria, should not be modified by the caller.

Throws:

IOException - If there is a low-level I/O error.

getDocListAndSet

public DocListAndSet getDocListAndSet(Query query,
                             List<Query> filterList,
                             Sort lsort,
                             int offset,
                             int len,
                             int flags)
                               throws IOException

Returns documents matching both query and the intersection of filterList, sorted by sort. Also returns the compete set of documents matching query and filter (regardless of offset and len).

This method is cache aware and may retrieve filter from the cache or make an insertion into the cache as a result of this call.

FUTURE: The returned DocList may be retrieved from a cache.

The DocList and DocSet returned should not be modified.

Parameters:

filterList - may be null

lsort - criteria by which to sort (if null, query relevance is used)

offset - offset into the list of documents to return

len - maximum number of documents to return

flags - user supplied flags for the result set

Returns:

DocListAndSet meeting the specified criteria, should not be modified by the caller.

Throws:

IOException - If there is a low-level I/O error.

getDocListAndSet

public DocListAndSet getDocListAndSet(Query query,
                             DocSet filter,
                             Sort lsort,
                             int offset,
                             int len)
                               throws IOException

Returns documents matching both query and filter and sorted by sort. Also returns the compete set of documents matching query and filter (regardless of offset and len).

FUTURE: The returned DocList may be retrieved from a cache.

Parameters:

filter - may be null

lsort - criteria by which to sort (if null, query relevance is used)

offset - offset into the list of documents to return

len - maximum number of documents to return

Returns:

DocListAndSet meeting the specified criteria, should not be modified by the caller.

Throws:

IOException - If there is a low-level I/O error.

getDocListAndSet

public DocListAndSet getDocListAndSet(Query query,
                             DocSet filter,
                             Sort lsort,
                             int offset,
                             int len,
                             int flags)
                               throws IOException

Returns documents matching both query and filter and sorted by sort. Also returns the compete set of documents matching query and filter (regardless of offset and len).

This method is cache aware and may make an insertion into the cache as a result of this call.

FUTURE: The returned DocList may be retrieved from a cache.

The DocList and DocSet returned should not be modified.

Parameters:

filter - may be null

lsort - criteria by which to sort (if null, query relevance is used)

offset - offset into the list of documents to return

len - maximum number of documents to return

flags - user supplied flags for the result set

Returns:

DocListAndSet meeting the specified criteria, should not be modified by the caller.

Throws:

IOException - If there is a low-level I/O error.

sortDocSet

protected DocList sortDocSet(DocSet set,
                 Sort sort,
                 int nDocs)
                      throws IOException

Throws:

IOException

numDocs

public int numDocs(Query a,
          DocSet b)
            throws IOException

Returns the number of documents that match both a and b.

This method is cache-aware and may check as well as modify the cache.

Returns:

the number of documents in the intersection between a and b.

Throws:

IOException - If there is a low-level I/O error.

numDocs

public int numDocs(DocSet a,
          SolrIndexSearcher.DocsEnumState deState)
            throws IOException

Throws:

IOException

NOTE: This API is for internal purposes only and might change in incompatible ways in the next release.

numDocs

public int numDocs(Query a,
          Query b)
            throws IOException

Returns the number of documents that match both a and b.

This method is cache-aware and may check as well as modify the cache.

Returns:

the number of documents in the intersection between a and b.

Throws:

IOException - If there is a low-level I/O error.

readDocs

public Document[] readDocs(DocList ids)
                    throws IOException

Takes a list of docs (the doc ids actually), and returns an array of Documents containing all of the stored fields.

Throws:

IOException

warm

public void warm(SolrIndexSearcher old)
          throws IOException

Warm this searcher based on an old one (primarily for auto-cache warming).

Throws:

IOException

getCache

public SolrCache getCache(String cacheName)

return the named generic cache

cacheLookup

public Object cacheLookup(String cacheName,
                 Object key)

lookup an entry in a generic cache

cacheInsert

public Object cacheInsert(String cacheName,
                 Object key,
                 Object val)

insert an entry in a generic cache

getOpenTime

public long getOpenTime()

explain

public Explanation explain(Query query,
                  int doc)
                    throws IOException

Overrides:

explain in class IndexSearcher

Throws:

IOException

getName

public String getName()

Description copied from interface: SolrInfoMBean

Simple common usage name, e.g. BasicQueryHandler, or fully qualified clas name.

Specified by:

getName in interface SolrInfoMBean

getVersion

public String getVersion()

Description copied from interface: SolrInfoMBean

Simple common usage version, e.g. 2.0

Specified by:

getVersion in interface SolrInfoMBean

getDescription

public String getDescription()

Description copied from interface: SolrInfoMBean

Simple one or two line description

Specified by:

getDescription in interface SolrInfoMBean

getCategory

public SolrInfoMBean.Category getCategory()

Description copied from interface: SolrInfoMBean

Purpose of this Class

Specified by:

getCategory in interface SolrInfoMBean

getSource

public String getSource()

Description copied from interface: SolrInfoMBean

CVS Source, SVN Source, etc

Specified by:

getSource in interface SolrInfoMBean

getDocs

public URL[] getDocs()

Description copied from interface: SolrInfoMBean

Documentation URL list.

Suggested documentation URLs: Homepage for sponsoring project, FAQ on class usage, Design doc for class, Wiki, bug reporting URL, etc...

Specified by:

getDocs in interface SolrInfoMBean

getStatistics

public NamedList<Object> getStatistics()

Description copied from interface: SolrInfoMBean

Any statistics this instance would like to be publicly available via the Solr Administration interface.

Any Object type may be stored in the list, but only the toString() representation will be used.

Specified by:

getStatistics in interface SolrInfoMBean