Examples of org.apache.lucene.search.NRTManager

org.apache.lucene.search.NRTManager
Utility class to manage sharing near-real-time searchers across multiple searching thread. The difference vs SearcherManager is that this class enables individual requests to wait until specific indexing changes are visible.
You must create an IndexWriter, then create a {@link NRTManager.TrackingIndexWriter} from it, and pass that to theNRTManager. You may want to create two NRTManagers, once that always applies deletes on refresh and one that does not. In this case you should use a single {@link NRTManager.TrackingIndexWriter} instance for both.
Then, use {@link #acquire} to obtain the{@link IndexSearcher}, and {@link #release} (ideally,from within a finally clause) to release it.
NOTE: to use this class, you must call {@link #maybeRefresh()}periodically. The {@link NRTManagerReopenThread} is asimple class to do this on a periodic basis, and reopens more quickly if a request is waiting. If you implement your own reopener, be sure to call {@link #addWaitingListener} so your reopener is notified when acaller is waiting for a specific generation searcher.
@see SearcherFactory @lucene.experimental

    analyzer = new StandardAnalyzer(LUCENE_VERSION);
    try {
      IndexWriterConfig config = new IndexWriterConfig(LUCENE_VERSION, analyzer);
      config.setOpenMode(OpenMode.CREATE_OR_APPEND);
      indexWriter = new IndexWriter(directory.getDirectory(), config);
      nrtManager = new NRTManager(indexWriter, new WaveSearchWarmer(waveDomain));
    } catch (IOException ex) {
      throw new IndexException(ex);
    }


    nrtManagerReopenThread = new NRTManagerReopenThread(nrtManager, MAX_STALE_SEC, MIN_STALE_SEC);

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      }
    };


    _trackingWriter = new TrackingIndexWriter(_writer);
    _indexImporter = new IndexImporter(_trackingWriter, _lock, _shardContext, TimeUnit.SECONDS, 10);
    _nrtManagerRef.set(new NRTManager(_trackingWriter, _searcherFactory, APPLY_ALL_DELETES));
    // start commiter


    _committer = new Thread(new Committer());
    _committer.setDaemon(true);
    _committer.setName("Commit Thread [" + _tableContext.getTable() + "/" + shardContext.getShard() + "]");

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    analyzer = new StandardAnalyzer(LUCENE_VERSION);
    try {
      IndexWriterConfig config = new IndexWriterConfig(LUCENE_VERSION, analyzer);
      config.setOpenMode(OpenMode.CREATE_OR_APPEND);
      indexWriter = new IndexWriter(directory.getDirectory(), config);
      nrtManager = new NRTManager(indexWriter, new WaveSearchWarmer(waveDomain));
    } catch (IOException ex) {
      throw new IndexException(ex);
    }


    nrtManagerReopenThread = new NRTManagerReopenThread(nrtManager, MAX_STALE_SEC, MIN_STALE_SEC);

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