Review

9

org/apache/lucene/index/IndexModifier.java

createIndexWriter()

class IndexModifier {
  /**
   * Close the IndexReader and open an IndexWriter.
   * @throws CorruptIndexException if the index is corrupt
   * @throws LockObtainFailedException if another writer
   *  has this index open (<code>write.lock</code> could not
   *  be obtained)
   * @throws IOException if there is a low-level IO error
   */
  protected void createIndexWriter() throws CorruptIndexException, LockObtainFailedException, IOException {
    if (indexWriter == null) {
      if (indexReader != null) {
        indexReader.close();
        indexReader = null;
      }
      indexWriter = new IndexWriter(directory, analyzer, false, new IndexWriter.MaxFieldLength(maxFieldLength));
      // IndexModifier cannot use ConcurrentMergeScheduler
      // because it synchronizes on the directory which can
      // cause deadlock
      indexWriter.setMergeScheduler(new SerialMergeScheduler());
      indexWriter.setInfoStream(infoStream);
      indexWriter.setUseCompoundFile(useCompoundFile);
      if (maxBufferedDocs != IndexWriter.DISABLE_AUTO_FLUSH)
        indexWriter.setMaxBufferedDocs(maxBufferedDocs);
      indexWriter.setMergeFactor(mergeFactor);
    }
  }

}