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

Class org.apache.lucene.index.IndexWriter

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

org.apache.lucene.index.IndexWriter.deleteAll()
Delete all documents in the index.
This method will drop all buffered documents and will remove all segments from the index. This change will not be visible until a {@link #commit()} has been called. This methodcan be rolled back using {@link #rollback()}.

NOTE: this method is much faster than using deleteDocuments( new MatchAllDocsQuery() ).

NOTE: this method will forcefully abort all merges in progress. If other threads are running {@link #forceMerge}, {@link #addIndexes(IndexReader[])} or{@link #forceMergeDeletes} methods, they may receive{@link MergePolicy.MergeAbortedException}s.

    final IndexWriterConfig config = new IndexWriterConfig(
        ConstResolver.VERSION, analyzer);


    final IndexWriter writer = new IndexWriter(getDirectory(), config);


    writer.deleteAll();


    writer.close();


  }

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    IndexReader ir = IndexReader.open(FSDirectory.open(nsdl_global_file), true);


    IndexWriter testIW = NSDLIndex.createIndexWriter(TEST_INDEX_NAME);
    IndexWriter trainIW = NSDLIndex.createIndexWriter(TRAIN_INDEX_NAME);
    testIW.deleteAll();
    trainIW.deleteAll();


    // first search for all documents having at least one value for each of
    // content, description, title, subject, audience fields
    IndexSearcher searcher = new IndexSearcher(ir);

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    IndexReader ir = IndexReader.open(FSDirectory.open(nsdl_global_file), true);


    IndexWriter testIW = NSDLIndex.createIndexWriter(TEST_INDEX_NAME);
    IndexWriter trainIW = NSDLIndex.createIndexWriter(TRAIN_INDEX_NAME);
    testIW.deleteAll();
    trainIW.deleteAll();


    // first search for all documents having at least one value for each of
    // content, description, title, subject, audience fields
    IndexSearcher searcher = new IndexSearcher(ir);

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    IndexWriterConfig iwConfig;
    iwConfig = new IndexWriterConfig(VERSION, analyzer);


    IndexWriter iw;
    iw = new IndexWriter(FSDirectory.open(nsdl_index_dir), iwConfig);
    iw.deleteAll();
    return iw;
  }
  
  public static void createSmallIndex() throws Exception {

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  public void delete() {
    try {
      IndexWriter writer = index.writer;


      writer.deleteAll();
      writer.commit();
    } catch (IOException e) {
      log.log(Level.SEVERE, "IO error while deleting index.", e);
    }
  }

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    @DELETE
    public Response delete() throws IOException {
        final IndexWriter writer = new IndexWriter(directory, config);
        
        try {
            writer.deleteAll();
            writer.commit();
        } finally {
            writer.close();
        }

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            }
        }
        logger.debug("instances " + instances.size());
        IndexWriter writer = luceneTools.getIndexWriter(true);
        try {
            writer.deleteAll();
        } catch (IOException ex) {
            throw new RuntimeException(ex);
        }
        for (NonLiteral instance : instances) {
            indexResource(instance, writer);

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    final IndexWriterConfig config = new IndexWriterConfig(
        ConstResolver.VERSION, analyzer);


    final IndexWriter writer = new IndexWriter(getDirectory(), config);


    writer.deleteAll();


    writer.close();


  }

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    RetryingRunnable runnable = new RetryingRunnable() 
    {  
      public void run() throws Exception 
      {
        IndexWriter w = createIndexWriter(true); // open for writing and close (make empty)
        w.deleteAll();
        w.commit();
        w.close(true);
        
        Directory dir = getIndexDir();
        for(String file: dir.listAll())

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    final IndexWriterConfig config = new IndexWriterConfig(
        ConstResolver.VERSION, analyzer);


    final IndexWriter writer = new IndexWriter(getDirectory(), config);


    writer.deleteAll();


    writer.close();


  }

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