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.

  public final void clearIndex() throws IOException {
    ensureOpen();
    final IndexAccessor accessor = this.spellIndex.getAccessor();
    final IndexWriter writer = accessor.getWriter();
    try {
      writer.deleteAll();
      this.spellIndex.createReopenFile();
    } finally {
      if (accessor != null && writer != null) {
        accessor.release(writer);
      }

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    IndexWriterConfig config = new IndexWriterConfig(Version.LUCENE_30,
              new KeywordAnalyzer()).setOpenMode(this.writerOpenMode).setMergePolicy(
              new LogByteSizeMergePolicy());     
    try {      
      IndexWriter indexWriter = new IndexWriter(directory, config);
      indexWriter.deleteAll();
      indexWriter.close();
      // the TaxonomyReader should be refreshed after this but only if the IndexReaders have been reopened before
    } catch (IOException e) {
      LOGGER.error("Could not clear the Taxonomy", e);
    }

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      if (luceneIndexLoccation.useFacets()) {
        ta = luceneIndexLoccation.getTaxonomyAccessor();
      }
      try {
        writer = ia.getWriter();
        writer.deleteAll();
        if (ta != null) {
          ta.clearTaxonomy();
        }
        luceneIndexLoccation.resetIndexJobCreationTimes();
      } catch (IOException e) {

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    IndexAccessor accessor = null;
    IndexWriter writer = null;
    try {
      accessor = synonym.getSynonymLocation().getAccessor();
      writer = accessor.getWriter();
      writer.deleteAll();
      writer.commit();      
      indexLocation.createReopenFile();
      synonym.getSynonymLocation().resetIndexJobCreationTimes();
    } catch (IOException e) {
      log.error("Could not clear extension-index", e);

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    LuceneIndexLocation autocompleteLocation = autocompleter.getAutocompleteLocation();
    IndexAccessor ia = autocompleteLocation.getAccessor();
    IndexWriter writer = null;
    try {
      writer = ia.getWriter();
      writer.deleteAll();
      autocompleteLocation.resetIndexJobCreationTimes();
      autocompleteLocation.createReopenFile();
    } catch (IOException e) {
      log.error("Could not clear index", e);
    } finally {

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          // use the number of documents this word appears in
          wordsMap.put(word, sourceReader.docFreq(new Term(autocompletefield, word)));
        }
      }
      // DELETE OLD OBJECTS FROM INDEX
      writer.deleteAll();


      // UPDATE DOCUMENTS IN AUTOCOMPLETE INDEX
      for (String word : wordsMap.keySet()) {
        // ok index the word
        Document doc = new Document();

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          // use the number of documents this word appears in
          wordsMap.put(word, sourceReader.docFreq(new Term(autocompletefield, word)));
        }
      }
      // DELETE OLD OBJECTS FROM INDEX
      writer.deleteAll();


      // UPDATE DOCUMENTS IN AUTOCOMPLETE INDEX
      for (String word : wordsMap.keySet()) {
        // ok index the word
        Document doc = new Document();

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    for (int i = 0; i < numReaders; i++) {
      wrappedLeaves[i] = new FacetsPayloadMigrationReader(leaves.get(i).reader(), fieldTerms);
    }
    
    IndexWriter writer = new IndexWriter(indexDir, newIndexWriterConfig(TEST_VERSION_CURRENT, null));
    writer.deleteAll();
    try {
      writer.addIndexes(new MultiReader(wrappedLeaves));
      writer.commit();
    } finally {
      reader.close();

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          request.setAttribute("error", "Error during delete index:'" + indexName + "' cause:" + e.getMessage());
          log.error("Error during delete index '{}'.", indexName, e);
        }
      } else if("clear".equalsIgnoreCase(action)) {
        try (IndexWriter w = new IndexWriter(directory, getIndexWriterConfig(LUCENE_VERSION, analyzer))) {
          w.deleteAll();
          request.setAttribute("info", "Successfully cleared index:'" + indexName + "'.");
        } catch (Exception e) {
          request.setAttribute("error", "Error during clear index:'" + indexName + "' cause:" + e.getMessage());
          log.error("Error during clear index '{}'.", indexName, e);
        }

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    for (int i = 0; i < numReaders; i++) {
      wrappedLeaves[i] = new FacetsPayloadMigrationReader(leaves.get(i).reader(), fieldTerms);
    }
    
    IndexWriter writer = new IndexWriter(indexDir, newIndexWriterConfig(TEST_VERSION_CURRENT, null));
    writer.deleteAll();
    try {
      writer.addIndexes(new MultiReader(wrappedLeaves));
      writer.commit();
    } finally {
      reader.close();

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