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

Class org.apache.lucene.index.IndexWriter

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

org.apache.lucene.index.IndexWriter.deleteDocuments()
Deletes the document(s) containing term.
NOTE: if this method hits an OutOfMemoryError you should immediately close the writer. See above for details.
@param term the term to identify the documents to be deleted @throws CorruptIndexException if the index is corrupt @throws IOException if there is a low-level IO error

    try {
      
      logger.info("collectionName : {}", collectionName);      
      logger.info("delete indexing start................ {}", query);
      
      indexWriter.deleteDocuments(query);
          
      logger.info("end");
      
    } catch (IOException e) {

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      doc.add(new Field("body","body", Field.Store.NO, Field.Index.NOT_ANALYZED));
      writer.addDocument(doc);
    }
    
    writer.optimize();
    writer.deleteDocuments(new Term("id","0"));
    writer.close();


    IndexReader reader = IndexReader.open(dir);
    IndexSearcher search = new IndexSearcher(reader);
    assertTrue(reader.hasDeletions());

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    ConstantScoreQuery constantScore = new ConstantScoreQuery(filter);
    docs = searcher.search(constantScore, 1);
    assertEquals("[just filter] Should find a hit...", 1, docs.totalHits);


    // now delete the doc, refresh the reader, and see that it's not there
    writer.deleteDocuments(new Term("id", "1"));


    reader = refreshReader(reader);
    searcher = new IndexSearcher(reader);


    docs = searcher.search(new MatchAllDocsQuery(), filter, 1);

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    docs = searcher.search(constantScore, 1);
    assertEquals("[just filter] Should find a hit...", 1, docs.totalHits);
    assertEquals(missCount, filter.missCount);


    // now delete the doc, refresh the reader, and see that it's not there
    writer.deleteDocuments(new Term("id", "1"));


    reader = refreshReader(reader);
    searcher = new IndexSearcher(reader);


    docs = searcher.search(new MatchAllDocsQuery(), filter, 1);

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    writer.close();
  }
  
  private void deleteDocument() throws IOException {
    IndexWriter writer = new IndexWriter( dir, a, false, MaxFieldLength.LIMITED );
    writer.deleteDocuments( new Term( "t_text1", "del" ) );
    // To see negative idf, keep comment the following line
    //writer.optimize();
    writer.close();
  }

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    ConstantScoreQuery constantScore = new ConstantScoreQuery(filter);
    docs = searcher.search(constantScore, 1);
    assertEquals("[just filter] Should find a hit...", 1, docs.totalHits);


    // now delete the doc, refresh the reader, and see that it's not there
    writer.deleteDocuments(new Term("id", "1"));


    reader = refreshReader(reader);
    searcher = new IndexSearcher(reader);


    docs = searcher.search(new MatchAllDocsQuery(), filter, 1);

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    docs = searcher.search(constantScore, 1);
    assertEquals("[just filter] Should find a hit...", 1, docs.totalHits);
    assertEquals(missCount, filter.missCount);


    // now delete the doc, refresh the reader, and see that it's not there
    writer.deleteDocuments(new Term("id", "1"));


    reader = refreshReader(reader);
    searcher = new IndexSearcher(reader);


    missCount = filter.missCount;

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    constantScore = new ConstantScoreQuery(filter);
    docs = searcher.search(constantScore, 1);
    assertEquals("[just filter] Should find a hit...", 1, docs.totalHits);


    // now delete the doc, refresh the reader, and see that it's not there
    writer.deleteDocuments(new Term("id", "1"));


    reader = refreshReader(reader);
    searcher = new IndexSearcher(reader);


    docs = searcher.search(new MatchAllDocsQuery(), filter, 1);

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        Term bbb = new Term("content", "bbb");
        
        reader.close();
        
        dir.tweakBufferSizes();
        writer.deleteDocuments(new Term("id", "0"));
        reader = DirectoryReader.open(writer, true);
        IndexSearcher searcher = newSearcher(reader);
        ScoreDoc[] hits = searcher.search(new TermQuery(bbb), null, 1000).scoreDocs;
        dir.tweakBufferSizes();
        assertEquals(36, hits.length);

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        assertEquals(36, hits.length);
        
        reader.close();
        
        dir.tweakBufferSizes();
        writer.deleteDocuments(new Term("id", "4"));
        reader = DirectoryReader.open(writer, true);
        searcher = newSearcher(reader);


        hits = searcher.search(new TermQuery(bbb), null, 1000).scoreDocs;
        dir.tweakBufferSizes();

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