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

org.apache.lucene.index.IndexWriter
An IndexWriter creates and maintains an index.
The third argument (create) to the constructor determines whether a new index is created, or whether an existing index is opened for the addition of new documents. Note that you can open an index with create=true even while readers are using the index. The old readers will continue to search the "point in time" snapshot they had opened, and won't see the newly created index until they re-open.

In either case, documents are added with the addDocument method. When finished adding documents, close should be called.

If an index will not have more documents added for a while and optimal search performance is desired, then the optimize method should be called before the index is closed.

Opening an IndexWriter creates a lock file for the directory in use. Trying to open another IndexWriter on the same directory will lead to an IOException. The IOException is also thrown if an IndexReader on the same directory is used to delete documents from the index.

As of 2.1, IndexWriter can now delete documents by {@link Term} (see {@link #deleteDocuments} ) and update(delete then add) documents (see {@link #updateDocument}). Deletes are buffered until {@link #setMaxBufferedDeleteTerms} Terms at whichpoint they are flushed to the index. Note that a flush occurs when there are enough buffered deletes or enough added documents, whichever is sooner. When a flush occurs, both pending deletes and added documents are flushed to the index.

    Document doc = new Document();
    doc.add(new Field("id", "1", Field.Store.YES, Field.Index.UN_TOKENIZED));
    doc.add(new Field("author", "����IBM OSIһһ����", Field.Store.YES, Field.Index.TOKENIZED));
    doc.add(new Field("time", Long.toString(System.currentTimeMillis()), Field.Store.YES, Field.Index.UN_TOKENIZED));
    doc.add(new Field("content", "��֪����ʲôʱ��ʼ����ʲô�������涼�и����ڣ��ﵶ�����ڣ����ͷ����ڣ�������ֽ������ڣ��ҿ�ʼ���ɣ�����������ϣ�����ʲô�����ǲ�����ڵģ�", Field.Store.NO, Field.Index.TOKENIZED));
    IndexWriter writer = getWriter();
    try {
        writer.addDocument(doc);
        writer.optimize();
    }finally {
        writer.close();
    }
    System.out.println("doc count = " + writer.docCount());
        return 1;
    }

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      }
      wc++;
        }
        File segments = new File(lucenePath + File.separator + SEGMENTS);
        boolean bCreate = !segments.exists();
        return new IndexWriter(lucenePath,new StandardAnalyzer(),bCreate);
    }

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    for(int i=0;indexFields!=null && i<indexFields.length;i++){
      String propertyValue = getField(doc, indexFields[i]);
      lucene_doc.add(UnStored(indexFields[i], propertyValue));
    }
    //Write document
    IndexWriter writer = getWriter(doc.name());
    try {
        writer.addDocument(lucene_doc);
        writer.optimize();
    }finally {
      try{
        writer.close();
      }catch(Exception e){
        log.error("Error occur when closing IndexWriter", e);
      }finally{
        writer = null;
      }

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        path.append(File.separator);
        path.append(SEGMENTS);
        File segments = new File(path.toString());
        try{
          boolean bCreate = !segments.exists();
          return new IndexWriter(index_path,new StandardAnalyzer(),bCreate);
        }finally{
          path = null;
          segments = null;
          rp = null;
        }

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    try {
      indexName = indexFile.getCanonicalPath();
      directory = FSDirectory.getDirectory(indexName);
      if (create) {
        log.debug("Initialize index: '" + indexFile + "'");
        IndexWriter iw = new IndexWriter(directory,
            new StandardAnalyzer(), create);
        iw.close();
      }
    } catch (IOException e) {
      throw new HibernateException("Unable to initialize index: "
          + indexFile, e);
    }

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                    //## LUCENE3 begin ##
                    File f = new File(path);
                    Directory indexDir = FSDirectory.open(f);
                    boolean recreate = !IndexReader.indexExists(indexDir);
                    Analyzer analyzer = new StandardAnalyzer(Version.LUCENE_30);
                    IndexWriter writer = new IndexWriter(indexDir, analyzer,
                            recreate, IndexWriter.MaxFieldLength.UNLIMITED);
                    //see http://wiki.apache.org/lucene-java/NearRealtimeSearch
                    IndexReader reader = writer.getReader();
                    access = new IndexAccess();
                    access.writer = writer;
                    access.reader = reader;
                    access.searcher = new IndexSearcher(reader);
                    //## LUCENE3 end ##

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                String       botname = resultSet.getString("botname").toLowerCase();
                String       channel = resultSet.getString("channel").substring(1).toLowerCase();
                String       key = getIndexName(botname, servername, channel);
                Document     doc = new Document();
                Timestamp     moment = resultSet.getTimestamp("moment");
                IndexWriter   writer = (IndexWriter)index_writer_cache.get(key);


                if (writer == null)
                {
                  writer = getIndexWriter(key, true);


                  index_writer_cache.put(key, writer);
                }


                beginningOfDay.setTime(moment);
                beginningOfDay.setTimeZone(TimeZone.getTimeZone(DroneConfig.getTimezone()));
                beginningOfDay.set(Calendar.HOUR, 0);
                beginningOfDay.set(Calendar.MINUTE, 0);
                beginningOfDay.set(Calendar.SECOND, 0);
                beginningOfDay.set(Calendar.MILLISECOND, 0);


                long dayInMillis = beginningOfDay.getTimeInMillis();
                long timeInMillis = moment.getTime() - dayInMillis;


                // need to store channel without the '#'
                doc.add(new Field("moment", DateField.dateToString(resultSet.getTimestamp("moment")), true, true, true));
                doc.add(new Field("momentDateSort", String.valueOf(dayInMillis), false, true, false));
                doc.add(new Field("momentTimeSort", String.valueOf(timeInMillis), false, true, false));
                doc.add(new Field("botname", botname, true, true, true));
                doc.add(new Field("channel", channel, true, true, true));
                doc.add(new Field("servername", servername, true, true, true));
                doc.add(new Field("nickname", resultSet.getString("nickname"), true, true, true));
                doc.add(new Field("username", resultSet.getString("username"), true, true, true));
                doc.add(new Field("hostname", resultSet.getString("hostname"), true, true, true));
                doc.add(new Field("message", resultSet.getString("message"), true, true, true));


                try
                {
                  writer.addDocument(doc, getAnalyzer());
                }
                catch (IOException e)
                {
                  Logger
                    .getLogger("com.uwyn.drone.tools")

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        indexArticle( article );
    }


    private void indexArticle(Article article) throws IOException {
        Document doc = article.getOveriewDocument();
        IndexWriter writer = new IndexWriter( forum.getArticleOverview(), ws, true );
        writer.addDocument( doc );
        writer.close();
    }

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  public void testIndexReaderReopen() throws Exception{
    Directory idxDir = new RAMDirectory();
    Document[] docs = buildData();
    
    IndexWriter writer = new IndexWriter(idxDir,new StandardAnalyzer(Version.LUCENE_29),MaxFieldLength.UNLIMITED);
    writer.addDocument(docs[0]);
    writer.optimize();
    writer.commit();
    
    IndexReader idxReader = IndexReader.open(idxDir,true);
    BoboIndexReader boboReader = BoboIndexReader.getInstance(idxReader,_fconf);


    
    for (int i=1;i<docs.length;++i){
      Document doc = docs[i];
      int numDocs = boboReader.numDocs();
      BoboIndexReader reader = (BoboIndexReader)boboReader.reopen(true);
      assertSame(boboReader,reader);
      
      Directory tmpDir = new RAMDirectory();
      IndexWriter subWriter = new IndexWriter(tmpDir,new StandardAnalyzer(Version.LUCENE_29),MaxFieldLength.UNLIMITED);
      subWriter.addDocument(doc);
      subWriter.optimize();
      subWriter.close();
      writer.addIndexesNoOptimize(new Directory[]{tmpDir});
      writer.commit();
      reader = (BoboIndexReader)boboReader.reopen();
      assertNotSame(boboReader, reader);
      assertEquals(numDocs+1,reader.numDocs());

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  {
    List<FacetHandler<?>> facetHandlers = new ArrayList<FacetHandler<?>>();
    /* Underlying time facet for DynamicTimeRangeFacetHandler */
    facetHandlers.add(new RangeFacetHandler("timeinmillis", new PredefinedTermListFactory(Long.class, DynamicTimeRangeFacetHandler.NUMBER_FORMAT),null));
    Directory idxDir = new RAMDirectory();
    IndexWriter writer = new IndexWriter(idxDir,new StandardAnalyzer(Version.LUCENE_29),MaxFieldLength.UNLIMITED);
    
    long now = System.currentTimeMillis();
    DecimalFormat df = new DecimalFormat(DynamicTimeRangeFacetHandler.NUMBER_FORMAT);
    for(long l=0; l<53; l++)
    {
      Document d = new Document();
      d.add(buildMetaField("timeinmillis", df.format(now - l*3500000)));
      writer.addDocument(d);
      writer.optimize();
      writer.commit();
    }
    IndexReader idxReader = IndexReader.open(idxDir,true);
    BoboIndexReader boboReader = BoboIndexReader.getInstance(idxReader,facetHandlers);
    BoboBrowser browser = new BoboBrowser(boboReader);
    List<String> ranges = new ArrayList<String>();

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