Examples of org.apache.lucene.index.IndexWriter.commit()

Class org.apache.lucene.index.IndexWriter

Examples of org.apache.lucene.index.IndexWriter.commit()

org.apache.lucene.index.IndexWriter.commit()

Commits all pending changes (added & deleted documents, segment merges, added indexes, etc.) to the index, and syncs all referenced index files, such that a reader will see the changes and the index updates will survive an OS or machine crash or power loss. Note that this does not wait for any running background merges to finish. This may be a costly operation, so you should test the cost in your application and do it only when really necessary.

Note that this operation calls Directory.sync on the index files. That call should not return until the file contents & metadata are on stable storage. For FSDirectory, this calls the OS's fsync. But, beware: some hardware devices may in fact cache writes even during fsync, and return before the bits are actually on stable storage, to give the appearance of faster performance. If you have such a device, and it does not have a battery backup (for example) then on power loss it may still lose data. Lucene cannot guarantee consistency on such devices.

NOTE: if this method hits an OutOfMemoryError you should immediately close the writer. See above for details.
@see #prepareCommit @see #commit(Map)

    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);

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    {
      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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      analyzer = new WhitespaceAnalyzer();
      IndexWriter writer = new IndexWriter(directory, analyzer, true, MaxFieldLength.UNLIMITED);
      Document doc = new Document();
      addMetaDataField(doc,PathHandlerName,new String[]{"/a/b/c","/a/b/d"});
      writer.addDocument(doc);
      writer.commit();
      
      PathFacetHandler pathHandler = new PathFacetHandler("path",true);
      facetHandlers.add(pathHandler);
  }

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    dir = new RAMDirectory();
    IndexWriter iw = new IndexWriter(dir, analyzer, MaxFieldLength.UNLIMITED);
    Document doc = new Document();
    doc.add(new Field("txt", txt, Field.Store.YES, Field.Index.ANALYZED));
    iw.addDocument(doc);
    iw.commit();
    iw.optimize();
    iw.close();
  }


  public void testSearch() {

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      IndexWriter w = new IndexWriter(d, new WhitespaceAnalyzer(), true,
                                      MaxFieldLength.LIMITED);
      for (int i = 0; i < numDeletedDocs; i++) {
        w.addDocument(new Document());
      }
      w.commit();
      w.deleteDocuments( new MatchAllDocsQuery() );
      w.commit();


      if (0 < numDeletedDocs)
        Assert.assertTrue("writer has no deletions", w.hasDeletions());

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      for (int i = 0; i < numDeletedDocs; i++) {
        w.addDocument(new Document());
      }
      w.commit();
      w.deleteDocuments( new MatchAllDocsQuery() );
      w.commit();


      if (0 < numDeletedDocs)
        Assert.assertTrue("writer has no deletions", w.hasDeletions());


      Assert.assertEquals("writer is missing some deleted docs",

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  @Override
  public int doLogic() throws Exception {
    IndexWriter iw = getRunData().getIndexWriter();
    if (iw != null) {
      iw.commit(commitUserData);
    } else {
      IndexReader r = getRunData().getIndexReader();
      if (r != null) {
        r.commit(commitUserData);
        r.decRef();

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    String dummyTitle = "this is a dummy title ";
    doc.add(new TextField("title", dummyTitle, Field.Store.YES));
    String dummyContent = "there is some content written here";
    doc.add(new TextField("contents", dummyContent, Field.Store.YES));
    writer.addDocument(doc, analyzer);
    writer.commit();


    // try the search over the first doc
    DirectoryReader directoryReader = DirectoryReader.open(dir);
    IndexSearcher indexSearcher = newSearcher(directoryReader);
    TopDocs result = indexSearcher.search(new MatchAllDocsQuery(), 1);

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    String dogmasTitle = "dogmas";
    doc.add(new TextField("title", dogmasTitle, Field.Store.YES));
    String dogmasContents = "white men can't jump";
    doc.add(new TextField("contents", dogmasContents, Field.Store.YES));
    writer.addDocument(doc, analyzer);
    writer.commit();


    directoryReader.close();
    directoryReader = DirectoryReader.open(dir);
    indexSearcher = newSearcher(directoryReader);
    result = indexSearcher.search(new MatchAllDocsQuery(), 2);

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    IndexWriter w = new IndexWriter(d, new IndexWriterConfig(TEST_VERSION_CURRENT, new MockAnalyzer(random)));
    for (int i = 0; i < numDocs; i++) {
      w.addDocument(new Document());
    }
    w.forceMerge(1);
    w.commit();
    w.close();
    DirectoryReader reader = DirectoryReader.open(d);
    return new AllDeletedFilterReader(LuceneTestCase.getOnlySegmentReader(reader));
  }

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