com.xpn.xwiki.plugin.lucene
Class IndexRebuilder

java.lang.Object
  com.xpn.xwiki.util.AbstractXWikiRunnable
      com.xpn.xwiki.plugin.lucene.IndexRebuilder

All Implemented Interfaces:

java.lang.Runnable

public class IndexRebuilder
extends com.xpn.xwiki.util.AbstractXWikiRunnable

Handles rebuilding of the whole Lucene Search Index. This involves the following steps:

• empty the existing index
• retrieve the names of all virtual wikis
• foreach document in each virtual wiki:
  • index the document
  • get and index all translations of the document
  • get and index all attachments of the document
  • get and index all objects of the document

The rebuild can be triggered using the LucenePluginApi.rebuildIndex() method of the LucenePluginApi. Once a rebuild request is made, a new thread is created, so the requesting script can continue processing, while the rebuilding is done in the background. The actual indexing is done by the IndexUpdater thread, this thread just gathers the data and passes it to the IndexUpdater.

As a summary, this plugin:

• cleans the Lucene search indexes and re-submits all the contents of all the wikis for indexing
• without clogging the indexing thread (since 1.2)
• all in a background thread (since 1.2)
• making sure that only one rebuild is in progress (since 1.2)

Version:

$Id: IndexRebuilder.java 33152 2010-11-26 16:49:03Z tmortagne $

Constructor Summary

IndexRebuilder(IndexUpdater indexUpdater, com.xpn.xwiki.XWikiContext context)

Method Summary

protected int	addTranslationsOfDocument(com.xpn.xwiki.doc.XWikiDocument document, com.xpn.xwiki.XWikiContext wikiContext)
org.apache.lucene.search.Searcher	createSearcher(org.apache.lucene.store.Directory directory, com.xpn.xwiki.XWikiContext context)
protected int	indexWiki(java.lang.String wikiName, com.xpn.xwiki.XWikiContext context) Adds the content of a given wiki to the indexUpdater's queue.
boolean	isIndexed(java.lang.String wikiName, java.lang.String documentName, org.apache.lucene.search.Searcher searcher)
protected void	runInternal()
int	startIndex(java.util.Collection<java.lang.String> wikis, java.lang.String hqlFilter, boolean clearIndex, boolean onlyNew, com.xpn.xwiki.XWikiContext context)
int	startRebuildIndex(com.xpn.xwiki.XWikiContext context)

Methods inherited from class com.xpn.xwiki.util.AbstractXWikiRunnable

cleanupExecutionContext, initExecutionContext, run

Methods inherited from class java.lang.Object

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

Constructor Detail

IndexRebuilder

public IndexRebuilder(IndexUpdater indexUpdater,
                      com.xpn.xwiki.XWikiContext context)

Method Detail

startRebuildIndex

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

startIndex

public int startIndex(java.util.Collection<java.lang.String> wikis,
                      java.lang.String hqlFilter,
                      boolean clearIndex,
                      boolean onlyNew,
                      com.xpn.xwiki.XWikiContext context)

runInternal

protected void runInternal()

Specified by:

runInternal in class com.xpn.xwiki.util.AbstractXWikiRunnable

indexWiki

protected int indexWiki(java.lang.String wikiName,
                        com.xpn.xwiki.XWikiContext context)

Adds the content of a given wiki to the indexUpdater's queue.

Parameters:

wikiName - the name of the wiki to index

context - the XWiki context

Returns:

the number of indexed elements

addTranslationsOfDocument

protected int addTranslationsOfDocument(com.xpn.xwiki.doc.XWikiDocument document,
                                        com.xpn.xwiki.XWikiContext wikiContext)

isIndexed

public boolean isIndexed(java.lang.String wikiName,
                         java.lang.String documentName,
                         org.apache.lucene.search.Searcher searcher)

createSearcher

public org.apache.lucene.search.Searcher createSearcher(org.apache.lucene.store.Directory directory,
                                                        com.xpn.xwiki.XWikiContext context)