Ejemplo n.º 1
0
  /**
   * Updates the lucene index for a single page.
   *
   * @param page The WikiPage to check
   * @param text The page text to index.
   */
  protected synchronized void updateLuceneIndex(WikiPage page, String text) {
    IndexWriter writer = null;

    log.debug("Updating Lucene index for page '" + page.getName() + "'...");

    Directory luceneDir = null;
    try {
      pageRemoved(page);

      // Now add back the new version.
      luceneDir = new SimpleFSDirectory(new File(m_luceneDirectory), null);
      writer = getIndexWriter(luceneDir);

      luceneIndexPage(page, text, writer);
    } catch (IOException e) {
      log.error("Unable to update page '" + page.getName() + "' from Lucene index", e);
      // reindexPage( page );
    } catch (Exception e) {
      log.error("Unexpected Lucene exception - please check configuration!", e);
      // reindexPage( page );
    } finally {
      close(writer);
    }

    log.debug("Done updating Lucene index for page '" + page.getName() + "'.");
  }
Ejemplo n.º 2
0
 /** {@inheritDoc} */
 public void pageRemoved(WikiPage page) {
   IndexWriter writer = null;
   try {
     Directory luceneDir = new SimpleFSDirectory(new File(m_luceneDirectory), null);
     writer = getIndexWriter(luceneDir);
     Query query = new TermQuery(new Term(LUCENE_ID, page.getName()));
     writer.deleteDocuments(query);
   } catch (Exception e) {
     log.error("Unable to remove page '" + page.getName() + "' from Lucene index", e);
   } finally {
     close(writer);
   }
 }
Ejemplo n.º 3
0
  /**
   * Adds a page-text pair to the lucene update queue. Safe to call always
   *
   * @param page WikiPage to add to the update queue.
   */
  public void reindexPage(WikiPage page) {
    if (page != null) {
      String text;

      // TODO: Think if this was better done in the thread itself?

      if (page instanceof Attachment) {
        text = getAttachmentContent((Attachment) page);
      } else {
        text = m_engine.getPureText(page);
      }

      if (text != null) {
        // Add work item to m_updates queue.
        Object[] pair = new Object[2];
        pair[0] = page;
        pair[1] = text;
        m_updates.add(pair);
        log.debug("Scheduling page " + page.getName() + " for index update");
      }
    }
  }
Ejemplo n.º 4
0
  /**
   * Indexes page using the given IndexWriter.
   *
   * @param page WikiPage
   * @param text Page text to index
   * @param writer The Lucene IndexWriter to use for indexing
   * @return the created index Document
   * @throws IOException If there's an indexing problem
   */
  protected Document luceneIndexPage(WikiPage page, String text, IndexWriter writer)
      throws IOException {
    if (log.isDebugEnabled()) log.debug("Indexing " + page.getName() + "...");

    // make a new, empty document
    Document doc = new Document();

    if (text == null) return doc;

    // Raw name is the keyword we'll use to refer to this document for updates.
    Field field = new Field(LUCENE_ID, page.getName(), Field.Store.YES, Field.Index.NOT_ANALYZED);
    doc.add(field);

    // Body text.  It is stored in the doc for search contexts.
    field =
        new Field(
            LUCENE_PAGE_CONTENTS, text, Field.Store.YES, Field.Index.ANALYZED, Field.TermVector.NO);
    doc.add(field);

    // Allow searching by page name. Both beautified and raw
    String unTokenizedTitle =
        StringUtils.replaceChars(
            page.getName(), MarkupParser.PUNCTUATION_CHARS_ALLOWED, c_punctuationSpaces);

    field =
        new Field(
            LUCENE_PAGE_NAME,
            TextUtil.beautifyString(page.getName()) + " " + unTokenizedTitle,
            Field.Store.YES,
            Field.Index.ANALYZED,
            Field.TermVector.NO);
    doc.add(field);

    // Allow searching by authorname

    if (page.getAuthor() != null) {
      field =
          new Field(
              LUCENE_AUTHOR,
              page.getAuthor(),
              Field.Store.YES,
              Field.Index.ANALYZED,
              Field.TermVector.NO);
      doc.add(field);
    }

    // Now add the names of the attachments of this page
    try {
      Collection attachments = m_engine.getAttachmentManager().listAttachments(page);
      String attachmentNames = "";

      for (Iterator it = attachments.iterator(); it.hasNext(); ) {
        Attachment att = (Attachment) it.next();
        attachmentNames += att.getName() + ";";
      }
      field =
          new Field(
              LUCENE_ATTACHMENTS,
              attachmentNames,
              Field.Store.YES,
              Field.Index.ANALYZED,
              Field.TermVector.NO);
      doc.add(field);

    } catch (ProviderException e) {
      // Unable to read attachments
      log.error("Failed to get attachments for page", e);
    }
    writer.addDocument(doc);

    return doc;
  }
Ejemplo n.º 5
0
  /**
   * Performs a full Lucene reindex, if necessary.
   *
   * @throws IOException If there's a problem during indexing
   */
  protected void doFullLuceneReindex() throws IOException {
    File dir = new File(m_luceneDirectory);

    String[] filelist = dir.list();

    if (filelist == null) {
      throw new IOException(
          "Invalid Lucene directory: cannot produce listing: " + dir.getAbsolutePath());
    }

    try {
      if (filelist.length == 0) {
        //
        //  No files? Reindex!
        //
        Date start = new Date();
        IndexWriter writer = null;

        log.info("Starting Lucene reindexing, this can take a couple minutes...");

        Directory luceneDir = new SimpleFSDirectory(dir, null);

        try {
          writer = getIndexWriter(luceneDir);
          Collection allPages = m_engine.getPageManager().getAllPages();

          for (Iterator iterator = allPages.iterator(); iterator.hasNext(); ) {
            WikiPage page = (WikiPage) iterator.next();

            try {
              String text =
                  m_engine
                      .getPageManager()
                      .getPageText(page.getName(), WikiProvider.LATEST_VERSION);
              luceneIndexPage(page, text, writer);
            } catch (IOException e) {
              log.warn("Unable to index page " + page.getName() + ", continuing to next ", e);
            }
          }

          Collection allAttachments = m_engine.getAttachmentManager().getAllAttachments();
          for (Iterator iterator = allAttachments.iterator(); iterator.hasNext(); ) {
            Attachment att = (Attachment) iterator.next();

            try {
              String text = getAttachmentContent(att.getName(), WikiProvider.LATEST_VERSION);
              luceneIndexPage(att, text, writer);
            } catch (IOException e) {
              log.warn("Unable to index attachment " + att.getName() + ", continuing to next", e);
            }
          }

        } finally {
          close(writer);
        }

        Date end = new Date();
        log.info(
            "Full Lucene index finished in "
                + (end.getTime() - start.getTime())
                + " milliseconds.");
      } else {
        log.info("Files found in Lucene directory, not reindexing.");
      }
    } catch (NoClassDefFoundError e) {
      log.info("Lucene libraries do not exist - not using Lucene.");
    } catch (IOException e) {
      log.error("Problem while creating Lucene index - not using Lucene.", e);
    } catch (ProviderException e) {
      log.error("Problem reading pages while creating Lucene index (JSPWiki won't start.)", e);
      throw new IllegalArgumentException("unable to create Lucene index");
    } catch (Exception e) {
      log.error("Unable to start lucene", e);
    }
  }