Examples of org.apache.lucene.index.AtomicReader

org.apache.lucene.index.AtomicReader
{@code AtomicReader} is an abstract class, providing an interface for accessing anindex. Search of an index is done entirely through this abstract interface, so that any subclass which implements it is searchable. IndexReaders implemented by this subclass do not consist of several sub-readers, they are atomic. They support retrieval of stored fields, doc values, terms, and postings.
For efficiency, in this API documents are often referred to via document numbers, non-negative integers which each name a unique document in the index. These document numbers are ephemeral -- they may change as documents are added to and deleted from an index. Clients should thus not rely on a given document having the same number between sessions.

NOTE: {@link IndexReader} instances are completely threadsafe, meaning multiple threads can call any of its methods, concurrently. If your application requires external synchronization, you should not synchronize on the IndexReader instance; use your own (non-Lucene) objects instead.

    };
    String shard = "shard";
    TableDescriptor table = new TableDescriptor();
    table.setName("test");


    AtomicReader reader = indexReader.leaves().iterator().next().reader();


    long t1 = System.nanoTime();
    indexWarmup.warmBlurIndex(table, shard, reader, isClosed, releaseReader, pauseWarmup);
    long t2 = System.nanoTime();
    System.out.println((t2 - t1) / 1000000.0);

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    Info info = _infoMap.get(key);
    if (info == null) {
      info = new Info(context, scorers, _locks);
      _infoMap.put(key, info);
    } else {
      AtomicReader reader = context.reader();
      LOG.warn("Info about reader context [{0}] already created, existing Info [{1}] current reader [{2}].", context,
          info, reader);
    }
  }

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    public String toString() {
      return "Info scorers length [" + _scorers.length + "] reader [" + _reader + "]";
    }


    Info(AtomicReaderContext context, Scorer[] scorers, Lock[] locks) {
      AtomicReader reader = context.reader();
      _bitSet = new OpenBitSet(reader.maxDoc());
      _scorers = scorers;
      _reader = reader;
      _readerStr = _reader.toString();
      _maxDoc = _reader.maxDoc();
      _locks = locks;

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  private Iterable<String> getFields(IndexReader reader) throws IOException {
    Set<String> fields = new TreeSet<String>();
    for (IndexReaderContext ctext : reader.getContext().leaves()) {
      AtomicReaderContext atomicReaderContext = (AtomicReaderContext) ctext;
      AtomicReader atomicReader = atomicReaderContext.reader();
      if (atomicReader instanceof SegmentReader) {
        for (String f : atomicReader.fields()) {
          fields.add(f);
        }
      }
    }
    return fields;

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    _filter = filter;
  }


  @Override
  public DocIdSet getDocIdSet(AtomicReaderContext context, Bits acceptDocs) throws IOException {
    AtomicReader reader = context.reader();
    Object key = reader.getCoreCacheKey();
    DocIdSet docIdSet = _cache.get(key);
    if (docIdSet != null) {
      _hits.incrementAndGet();
      return BitsFilteredDocIdSet.wrap(docIdSet, acceptDocs);
    }

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      BlurPartitioner blurPartitioner = new BlurPartitioner();
      Text key = new Text();
      int numberOfShards = _shardContext.getTableContext().getDescriptor().getShardCount();
      int shardId = BlurUtil.getShardIndex(shard);
      for (AtomicReaderContext context : leaves) {
        AtomicReader atomicReader = context.reader();
        Fields fields = atomicReader.fields();
        Terms terms = fields.terms(BlurConstants.ROW_ID);
        if (terms != null) {
          TermsEnum termsEnum = terms.iterator(null);
          BytesRef ref = null;
          while ((ref = termsEnum.next()) != null) {

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    if (startWith == null) {
      startWith = "";
    }
    Term term = getTerm(columnFamily, columnName, startWith);
    List<String> terms = new ArrayList<String>(size);
    AtomicReader areader = BlurUtil.getAtomicReader(reader);
    Terms termsAll = areader.terms(term.field());


    if (termsAll == null) {
      return terms;
    }

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    if (indexReader instanceof SegmentReader) {
      return (SegmentReader) indexReader;
    }
    if (indexReader instanceof ExitableFilterAtomicReader) {
      ExitableFilterAtomicReader exitableFilterAtomicReader = (ExitableFilterAtomicReader) indexReader;
      AtomicReader originalReader = exitableFilterAtomicReader.getOriginalReader();
      return getSegmentReader(originalReader);
    }
    return null;
  }

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      if (_isClosed.get() || _stop.get()) {
        LOG.info("Context [{0}] index closed", context);
        return null;
      }
      AtomicReaderContext atomicReaderContext = (AtomicReaderContext) ctext;
      AtomicReader atomicReader = atomicReaderContext.reader();
      if (atomicReader instanceof SegmentReader) {
        SegmentReader segmentReader = (SegmentReader) atomicReader;
        if (segmentReader.getSegmentName().equals(segmentName)) {
          return segmentReader.directory();
        }

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      if (_isClosed.get() || _stop.get()) {
        LOG.info("Context [{0}] index closed", context);
        return null;
      }
      AtomicReaderContext atomicReaderContext = (AtomicReaderContext) ctext;
      AtomicReader atomicReader = atomicReaderContext.reader();
      if (atomicReader instanceof SegmentReader) {
        SegmentReader segmentReader = (SegmentReader) atomicReader;
        return segmentReader.directory();
      }
    }

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