Examples of org.apache.lucene.index.IndexWriter$Event

org.apache.lucene.index.IndexWriter
Interface for internal atomic events. See {@link DocumentsWriter} for details. Events are executed concurrently and no order is guaranteed.Each event should only rely on the serializeability within it's process method. All actions that must happen before or after a certain action must be encoded inside the {@link #process(IndexWriter,boolean,boolean)} method.

  private void initCustomDataIndex(String dataFile, Directory directory)
      throws CorruptIndexException, LockObtainFailedException,
      IOException {
    BufferedReader dataReader = createDataBufferedReader(dataFile);
    if (dataReader != null) {
      IndexWriter indexWriter = new IndexWriter(directory,
          new KeywordAnalyzer(), true);
      try {
        String aline = dataReader.readLine();
        while (aline != null) {
          StringTokenizer tokenizer = new StringTokenizer(aline,
              "\n\r\f", false);
          while (tokenizer.hasMoreTokens()) {
            String token = tokenizer.nextToken().trim();
            if (token != null) {
              Document doc = createDocument(token);
              indexWriter.addDocument(doc);
            }
          }
          aline = dataReader.readLine();
        }
        indexWriter.optimize();
      } finally {
        if (indexWriter != null) {
          try {
            indexWriter.close();
          } catch (Exception e) {
            logger.error(e);
          }
        }
        if (dataReader != null) {

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    workerThread.setDaemon(true);
    workerThread.start();
  }


  private void createEmptyIndexDirectory() {
    IndexWriter writer = null;
    try {
      writer = new IndexWriter(indexDirectory, DocumentCreator
          .createDocumentAnalyzer(), true);
    } catch (Exception e) {
      logger.error("Unable to reset the search index. Path "
          + indexDirectory.toString(), e);
    } finally {
      if (writer != null) {
        try {
          writer.optimize();
          writer.close();
        } catch (Exception e) {
          logger.error(e);
        }
      }
    }

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      directory = new RAMDirectory();
      directory.setLockFactory(NoLockFactory.getNoLockFactory());


      /* Index News */
      try {
        IndexWriter indexWriter = new IndexWriter(directory, Indexer.createAnalyzer());
        for (int i = 0; i < news.size(); i++) {


          /* Return early on cancellation */
          if (monitor.isCanceled() || Owl.isShuttingDown())
            return false;


          NewsDocument document = new NewsDocument(news.get(i));
          document.addFields(indexDescription);
          document.getDocument().getField(SearchDocument.ENTITY_ID_TEXT).setValue(String.valueOf(i));
          indexWriter.addDocument(document.getDocument());
        }
        indexWriter.close();


        searcher[0] = new IndexSearcher(directory);
      } catch (Exception e) {
        directory.close();
        throw e;

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  boolean freshIndex = (crawlConfig.getFreshIndex() == -1) ? freshCrawl: 
         (crawlConfig.getFreshIndex() ==  0) ? false: true;
  try  
  { 
   fsd = FSDirectory.getDirectory(new File(Constants.getINDEXDIR()), freshIndex); 
   analyzer = new StandardBgramAnalyzer(); iw = new IndexWriter(fsd, analyzer, freshIndex); 
   iw.setSimilarity(new SearchSimilarity());
   ctRef.setIw(iw); 
  }
  catch (IOException ie) { ctRef.cleanUp("Could not get IndexWriter " + ie.getMessage() ); }

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 /*
  * Create a RAM based Lucene index
  */
 private void createRamIW()
 { try { ramIW = new IndexWriter(ramDir, analyzer, true);  }
   catch (IOException ie) { logger.error("Could not create RAM index writer " + ie.getMessage()); }
   ramIW.setMaxFieldLength(Constants.LUCENE_MAX_WORDS);
 }

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    fNewsListener = null;
  }


  private IndexWriter createIndexWriter(Directory directory, boolean create) throws IOException {
    IndexWriter indexWriter = new IndexWriter(directory, createAnalyzer(), create);
    fFlushRequired = false;
    return indexWriter;
  }

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    fNewsListener = null;
  }


  private IndexWriter createIndexWriter(Directory directory, boolean create) throws IOException {
    IndexWriter indexWriter = new IndexWriter(directory, false, createAnalyzer(), create);
    indexWriter.setMergeFactor(6);
    fFlushRequired = false;
    return indexWriter;
  }

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    try {
      objects = new ArrayList();


      analyzer = new SimpleAnalyzer();
      indexDirectory = new RAMDirectory();
      indexWriter = new IndexWriter(indexDirectory,
          new IndexWriterConfig(Version.LUCENE_31,
              new LimitTokenCountAnalyzer(analyzer,
                  Integer.MAX_VALUE))
              .setOpenMode(OpenMode.CREATE));
      queryParser = new QueryParser(Version.LUCENE_31, "text", analyzer);

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   */
  public void indexItems(boolean createNewIndex, Collection<ItemIF> items)
    throws java.io.IOException {
    
    logger.info("Start writing index.");
    IndexWriter writer = new IndexWriter(indexDir, analyzer, createNewIndex);
    Iterator<ItemIF> itI = items.iterator();
    while (itI.hasNext()) {
      ItemIF item = itI.next();
      if (logger.isDebugEnabled()) {
        logger.debug("Add item " + item + " to index.");
      }
      writer.addDocument(ItemDocument.makeDocument(item));
    }
    writer.optimize();
    nrOfIndexedItems = writer.docCount();
    writer.close();
    logger.info("Finished writing index.");
  }

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    return index;
  }
  
  private RAMDirectory createRAMIndex(Document doc) {
    RAMDirectory dir = new RAMDirectory();    
    IndexWriter writer = null;
    try {
      writer = new IndexWriter(dir, analyzer, true);
      writer.setMaxFieldLength(Integer.MAX_VALUE);
      writer.addDocument(doc);
      writer.optimize();
      return dir;
    } catch (IOException e) { // should never happen (RAMDirectory)
      throw new RuntimeException(e);
    } finally {
      try {
        if (writer != null) writer.close();
      } catch (IOException e) { // should never happen (RAMDirectory)
        throw new RuntimeException(e);
      }
    }
  }

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