Examples of org.apache.lucene.index.IndexReader.reopen()

Class org.apache.lucene.index.IndexReader

Examples of org.apache.lucene.index.IndexReader.reopen()

org.apache.lucene.index.IndexReader.reopen()
er was reopened reader.close(); } reader = newReader; ... Be sure to synchronize that code so that other threads, if present, can never use reader after it has been closed and before it's switched to newReader.
NOTE: If this reader is a near real-time reader (obtained from {@link IndexWriter#getReader()}, reopen() will simply call writer.getReader() again for you, though this may change in the future. @throws CorruptIndexException if the index is corrupt @throws IOException if there is a low-level IO error @deprecated Use IndexReader#openIfChanged(IndexReader) instead

      IndexReader updatedReader;
      lockOnReplaceCurrent.lock();
      try {
        IndexReader beforeUpdateReader = current.reader;
        try {
          updatedReader = beforeUpdateReader.reopen();
        } catch (IOException e) {
          throw new SearchException( "Unable to reopen IndexReader", e );
        }
        if ( beforeUpdateReader == updatedReader ) {
          previousCurrent = null;

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      IndexReader updatedReader;
      lockOnReplaceCurrent.lock();
      try {
        IndexReader beforeUpdateReader = current.reader;
        try {
          updatedReader = beforeUpdateReader.reopen();
        }
        catch ( IOException e ) {
          throw new SearchException( "Unable to reopen IndexReader", e );
        }
        if ( beforeUpdateReader == updatedReader ) {

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      IndexReader updatedReader;
      lockOnReplaceCurrent.lock();
      try {
        IndexReader beforeUpdateReader = current.reader;
        try {
          updatedReader = beforeUpdateReader.reopen();
        }
        catch ( IOException e ) {
          throw new SearchException( "Unable to reopen IndexReader", e );
        }
        if ( beforeUpdateReader == updatedReader ) {

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                .add(field("_id", "1")).build());
        IndexReader reader = IndexReader.open(indexWriter, true);
        assertThat(reader.numDocs(), equalTo(1));


        indexWriter.prepareCommit();
        reader = reader.reopen();
        assertThat(reader.numDocs(), equalTo(1));


        indexWriter.addDocument(doc()
                .add(field("_id", "2")).build());
        indexWriter.commit();

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        assertThat(reader.numDocs(), equalTo(1));


        indexWriter.addDocument(doc()
                .add(field("_id", "2")).build());
        indexWriter.commit();
        reader = reader.reopen();
        assertThat(reader.numDocs(), equalTo(2));
    }


    @Test public void testSimpleNumericOps() throws Exception {
        Directory dir = new RAMDirectory();

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        assertThat(UidField.loadVersion(reader, new Term("_uid", "1")), equalTo(-1l));


        Document doc = new Document();
        doc.add(new Field("_uid", "1", Field.Store.YES, Field.Index.NOT_ANALYZED));
        writer.addDocument(doc);
        reader = reader.reopen();
        assertThat(UidField.loadVersion(reader, new Term("_uid", "1")), equalTo(-2l));
        assertThat(UidField.loadDocIdAndVersion(reader, new Term("_uid", "1")).version, equalTo(-2l));


        doc = new Document();
        doc.add(new UidField("_uid", "1", 1));

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        assertThat(UidField.loadDocIdAndVersion(reader, new Term("_uid", "1")).version, equalTo(-2l));


        doc = new Document();
        doc.add(new UidField("_uid", "1", 1));
        writer.updateDocument(new Term("_uid", "1"), doc);
        reader = reader.reopen();
        assertThat(UidField.loadVersion(reader, new Term("_uid", "1")), equalTo(1l));
        assertThat(UidField.loadDocIdAndVersion(reader, new Term("_uid", "1")).version, equalTo(1l));


        doc = new Document();
        UidField uid = new UidField("_uid", "1", 2);

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        doc = new Document();
        UidField uid = new UidField("_uid", "1", 2);
        doc.add(uid);
        writer.updateDocument(new Term("_uid", "1"), doc);
        reader = reader.reopen();
        assertThat(UidField.loadVersion(reader, new Term("_uid", "1")), equalTo(2l));
        assertThat(UidField.loadDocIdAndVersion(reader, new Term("_uid", "1")).version, equalTo(2l));


        // test reuse of uid field
        doc = new Document();

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        // test reuse of uid field
        doc = new Document();
        uid.version(3);
        doc.add(uid);
        writer.updateDocument(new Term("_uid", "1"), doc);
        reader = reader.reopen();
        assertThat(UidField.loadVersion(reader, new Term("_uid", "1")), equalTo(3l));
        assertThat(UidField.loadDocIdAndVersion(reader, new Term("_uid", "1")).version, equalTo(3l));


        writer.deleteDocuments(new Term("_uid", "1"));
        reader = reader.reopen();

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        reader = reader.reopen();
        assertThat(UidField.loadVersion(reader, new Term("_uid", "1")), equalTo(3l));
        assertThat(UidField.loadDocIdAndVersion(reader, new Term("_uid", "1")).version, equalTo(3l));


        writer.deleteDocuments(new Term("_uid", "1"));
        reader = reader.reopen();
        assertThat(UidField.loadVersion(reader, new Term("_uid", "1")), equalTo(-1l));
        assertThat(UidField.loadDocIdAndVersion(reader, new Term("_uid", "1")), nullValue());
    }
}

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