com.xpn.xwiki.plugin.lucene
Class LucenePlugin

java.lang.Object
  com.xpn.xwiki.plugin.XWikiDefaultPlugin
      com.xpn.xwiki.plugin.lucene.LucenePlugin

All Implemented Interfaces:

com.xpn.xwiki.plugin.XWikiPluginInterface

public class LucenePlugin
extends com.xpn.xwiki.plugin.XWikiDefaultPlugin
implements com.xpn.xwiki.plugin.XWikiPluginInterface

A plugin offering support for advanced searches using Lucene, a high performance, open source search engine. It uses an IndexUpdater to monitor and submit wiki pages for indexing to the Lucene engine, and offers simple methods for searching documents, with the possiblity to sort by one or several document fields (besides the default sort by relevance), filter by one or several languages, and search in one, several or all virtual wikis.

Version:

$Id: LucenePlugin.java 24083 2009-09-27 03:51:16Z sdumitriu $

Field Summary

protected java.util.Properties	config
static java.lang.String	DOCTYPE_ATTACHMENT
static java.lang.String	DOCTYPE_OBJECTS
static java.lang.String	DOCTYPE_WIKIPAGE
static java.lang.String	PROP_ANALYZER
static java.lang.String	PROP_INDEX_DIR
static java.lang.String	PROP_INDEXING_INTERVAL
static java.lang.String	PROP_MAX_QUEUE_SIZE

Constructor Summary

LucenePlugin(java.lang.String name, java.lang.String className, com.xpn.xwiki.XWikiContext context)

Method Summary

protected static void	closeSearchers(org.apache.lucene.search.Searcher[] searchers)
org.apache.lucene.search.Searcher[]	createSearchers(java.lang.String indexDirs) Creates an array of Searchers for a number of lucene indexes.
protected void	finalize()
void	flushCache(com.xpn.xwiki.XWikiContext context)
long	getActiveQueueSize()
java.lang.String	getIndexDirs()
long	getLuceneDocCount()
java.lang.String	getName()
com.xpn.xwiki.api.Api	getPluginApi(com.xpn.xwiki.plugin.XWikiPluginInterface plugin, com.xpn.xwiki.XWikiContext context)
long	getQueueSize()
SearchResults	getSearchResults(java.lang.String query, java.lang.String[] sortField, java.lang.String virtualWikiNames, java.lang.String languages, com.xpn.xwiki.XWikiContext context) Searches all Indexes configured in xwiki.cfg (property xwiki.plugins.lucene.indexdir).
SearchResults	getSearchResults(java.lang.String query, java.lang.String sortField, java.lang.String virtualWikiNames, java.lang.String languages, com.xpn.xwiki.XWikiContext context) Searches all Indexes configured in xwiki.cfg (property xwiki.plugins.lucene.indexdir).
SearchResults	getSearchResultsFromIndexes(java.lang.String query, java.lang.String[] sortFields, java.lang.String myIndexDirs, java.lang.String languages, com.xpn.xwiki.XWikiContext context) Allows to search special named lucene indexes without having to configure them in xwiki.cfg.
SearchResults	getSearchResultsFromIndexes(java.lang.String query, java.lang.String sortField, java.lang.String myIndexDirs, java.lang.String languages, com.xpn.xwiki.XWikiContext context) Allows to search special named lucene indexes without having to configure them in xwiki.cfg.
SearchResults	getSearchResultsFromIndexes(java.lang.String query, java.lang.String myIndexDirs, java.lang.String languages, com.xpn.xwiki.XWikiContext context) Allows to search special named lucene indexes without having to configure them in xwiki.cfg.
void	init(com.xpn.xwiki.XWikiContext context)
protected void	openSearchers() Opens the searchers for the configured index Dirs after closing any already existing ones.
void	queueAttachment(com.xpn.xwiki.doc.XWikiDocument doc, com.xpn.xwiki.doc.XWikiAttachment attach, com.xpn.xwiki.XWikiContext context)
void	queueAttachment(com.xpn.xwiki.doc.XWikiDocument doc, com.xpn.xwiki.XWikiContext context)
void	queueDocument(com.xpn.xwiki.doc.XWikiDocument doc, com.xpn.xwiki.XWikiContext context)
int	rebuildIndex(com.xpn.xwiki.XWikiContext context)

Methods inherited from class com.xpn.xwiki.plugin.XWikiDefaultPlugin

beginParsing, beginRendering, commonTagsHandler, downloadAttachment, endParsing, endRendering, endRenderingHandler, flushCache, getClassName, insidePREHandler, outsidePREHandler, setClassName, setName, startRenderingHandler, virtualInit

Methods inherited from class java.lang.Object

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

Methods inherited from interface com.xpn.xwiki.plugin.XWikiPluginInterface

beginParsing, beginRendering, commonTagsHandler, downloadAttachment, endParsing, endRendering, endRenderingHandler, flushCache, getClassName, insidePREHandler, outsidePREHandler, setClassName, setName, startRenderingHandler, virtualInit

Field Detail

DOCTYPE_WIKIPAGE

public static final java.lang.String DOCTYPE_WIKIPAGE

See Also:

Constant Field Values

DOCTYPE_OBJECTS

public static final java.lang.String DOCTYPE_OBJECTS

See Also:

Constant Field Values

DOCTYPE_ATTACHMENT

public static final java.lang.String DOCTYPE_ATTACHMENT

See Also:

Constant Field Values

PROP_INDEX_DIR

public static final java.lang.String PROP_INDEX_DIR

See Also:

Constant Field Values

PROP_ANALYZER

public static final java.lang.String PROP_ANALYZER

See Also:

Constant Field Values

PROP_INDEXING_INTERVAL

public static final java.lang.String PROP_INDEXING_INTERVAL

See Also:

Constant Field Values

PROP_MAX_QUEUE_SIZE

public static final java.lang.String PROP_MAX_QUEUE_SIZE

See Also:

Constant Field Values

config

protected java.util.Properties config

Constructor Detail

LucenePlugin

public LucenePlugin(java.lang.String name,
                    java.lang.String className,
                    com.xpn.xwiki.XWikiContext context)

Method Detail

finalize

protected void finalize()
                 throws java.lang.Throwable

Overrides:

finalize in class java.lang.Object

Throws:

java.lang.Throwable

See Also:

Object.finalize()

rebuildIndex

public int rebuildIndex(com.xpn.xwiki.XWikiContext context)

getSearchResultsFromIndexes

public SearchResults getSearchResultsFromIndexes(java.lang.String query,
                                                 java.lang.String myIndexDirs,
                                                 java.lang.String languages,
                                                 com.xpn.xwiki.XWikiContext context)
                                          throws java.lang.Exception

Allows to search special named lucene indexes without having to configure them in xwiki.cfg. Slower than getSearchResults(String, String, String, String, XWikiContext) since new index searcher instances are created for every query.

Parameters:

query - The base query, using the query engine supported by Lucene.

myIndexDirs - Comma separated list of directories containing the lucene indexes to search.

languages - Comma separated list of language codes to search in, may be null or empty to search all languages.

context - The context of the request.

Returns:

The list of search results.

Throws:

java.lang.Exception - If the index directories cannot be read, or the query is invalid.

getSearchResultsFromIndexes

public SearchResults getSearchResultsFromIndexes(java.lang.String query,
                                                 java.lang.String[] sortFields,
                                                 java.lang.String myIndexDirs,
                                                 java.lang.String languages,
                                                 com.xpn.xwiki.XWikiContext context)
                                          throws java.lang.Exception

Allows to search special named lucene indexes without having to configure them in xwiki.cfg. Slower than getSearchResults(java.lang.String, java.lang.String, java.lang.String, java.lang.String, com.xpn.xwiki.XWikiContext)since new index searcher instances are created for every query.

Parameters:

query - The base query, using the query engine supported by Lucene.

sortFields - A list of fields to sort results by. For each field, if the name starts with '-', then that field (excluding the -) is used for reverse sorting. If null or empty, sort by hit score.

myIndexDirs - Comma separated list of directories containing the lucene indexes to search.

languages - Comma separated list of language codes to search in, may be null or empty to search all languages.

context - The context of the request.

Returns:

The list of search results.

Throws:

java.lang.Exception - If the index directories cannot be read, or the query is invalid.

getSearchResultsFromIndexes

public SearchResults getSearchResultsFromIndexes(java.lang.String query,
                                                 java.lang.String sortField,
                                                 java.lang.String myIndexDirs,
                                                 java.lang.String languages,
                                                 com.xpn.xwiki.XWikiContext context)
                                          throws java.lang.Exception

Allows to search special named lucene indexes without having to configure them in xwiki.cfg. Slower than getSearchResults(String, String, String, String, XWikiContext) since new index searcher instances are created for every query.

Parameters:

query - The base query, using the query engine supported by Lucene.

sortField - The name of a field to sort results by. If the name starts with '-', then the field (excluding the -) is used for reverse sorting. If null or empty, sort by hit score.

myIndexDirs - Comma separated list of directories containing the lucene indexes to search.

languages - Comma separated list of language codes to search in, may be null or empty to search all languages.

context - The context of the request.

Returns:

The list of search results.

Throws:

java.lang.Exception - If the index directories cannot be read, or the query is invalid.

getSearchResults

public SearchResults getSearchResults(java.lang.String query,
                                      java.lang.String sortField,
                                      java.lang.String virtualWikiNames,
                                      java.lang.String languages,
                                      com.xpn.xwiki.XWikiContext context)
                               throws java.lang.Exception

Searches all Indexes configured in xwiki.cfg (property xwiki.plugins.lucene.indexdir).

Parameters:

query - The base query, using the query engine supported by Lucene.

sortField - The name of a field to sort results by. If the name starts with '-', then the field (excluding the -) is used for reverse sorting. If null or empty, sort by hit score.

virtualWikiNames - Comma separated list of virtual wiki names to search in, may be null to search all virtual wikis.

languages - Comma separated list of language codes to search in, may be null or empty to search all languages.

context - The context of the request.

Returns:

The list of search results.

Throws:

java.lang.Exception - If the index directories cannot be read, or the query is invalid.

getSearchResults

public SearchResults getSearchResults(java.lang.String query,
                                      java.lang.String[] sortField,
                                      java.lang.String virtualWikiNames,
                                      java.lang.String languages,
                                      com.xpn.xwiki.XWikiContext context)
                               throws java.lang.Exception

Searches all Indexes configured in xwiki.cfg (property xwiki.plugins.lucene.indexdir).

Parameters:

query - The base query, using the query engine supported by Lucene.

sortField - The name of a field to sort results by. If the name starts with '-', then the field (excluding the -) is used for reverse sorting. If null or empty, sort by hit score.

virtualWikiNames - Comma separated list of virtual wiki names to search in, may be null to search all virtual wikis.

languages - Comma separated list of language codes to search in, may be null or empty to search all languages.

context - The context of the request.

Returns:

The list of search results.

Throws:

java.lang.Exception - If the index directories cannot be read, or the query is invalid.

init

public void init(com.xpn.xwiki.XWikiContext context)

Specified by:

init in interface com.xpn.xwiki.plugin.XWikiPluginInterface

Overrides:

init in class com.xpn.xwiki.plugin.XWikiDefaultPlugin

flushCache

public void flushCache(com.xpn.xwiki.XWikiContext context)

Specified by:

flushCache in interface com.xpn.xwiki.plugin.XWikiPluginInterface

Overrides:

flushCache in class com.xpn.xwiki.plugin.XWikiDefaultPlugin

getName

public java.lang.String getName()

Specified by:

getName in interface com.xpn.xwiki.plugin.XWikiPluginInterface

Overrides:

getName in class com.xpn.xwiki.plugin.XWikiDefaultPlugin

getPluginApi

public com.xpn.xwiki.api.Api getPluginApi(com.xpn.xwiki.plugin.XWikiPluginInterface plugin,
                                          com.xpn.xwiki.XWikiContext context)

Specified by:

getPluginApi in interface com.xpn.xwiki.plugin.XWikiPluginInterface

Overrides:

getPluginApi in class com.xpn.xwiki.plugin.XWikiDefaultPlugin

createSearchers

public org.apache.lucene.search.Searcher[] createSearchers(java.lang.String indexDirs)
                                                    throws java.lang.Exception

Creates an array of Searchers for a number of lucene indexes.

Parameters:

indexDirs - Comma separated list of Lucene index directories to create searchers for.

Returns:

Array of searchers

Throws:

java.lang.Exception

openSearchers

protected void openSearchers()

Opens the searchers for the configured index Dirs after closing any already existing ones.

closeSearchers

protected static void closeSearchers(org.apache.lucene.search.Searcher[] searchers)
                              throws java.io.IOException

Throws:

java.io.IOException

getIndexDirs

public java.lang.String getIndexDirs()

getQueueSize

public long getQueueSize()

queueDocument

public void queueDocument(com.xpn.xwiki.doc.XWikiDocument doc,
                          com.xpn.xwiki.XWikiContext context)

queueAttachment

public void queueAttachment(com.xpn.xwiki.doc.XWikiDocument doc,
                            com.xpn.xwiki.doc.XWikiAttachment attach,
                            com.xpn.xwiki.XWikiContext context)

queueAttachment

public void queueAttachment(com.xpn.xwiki.doc.XWikiDocument doc,
                            com.xpn.xwiki.XWikiContext context)

getLuceneDocCount

public long getLuceneDocCount()

Returns:

the number of documents Lucene index writer.

getActiveQueueSize

public long getActiveQueueSize()

Returns:

the number of documents in the second queue gave to Lucene.