Examples of org.apache.lucene.index.IndexWriter$Event

org.apache.lucene.index.IndexWriter
Interface for internal atomic events. See {@link DocumentsWriter} for details. Events are executed concurrently and no order is guaranteed.Each event should only rely on the serializeability within it's process method. All actions that must happen before or after a certain action must be encoded inside the {@link #process(IndexWriter,boolean,boolean)} method.

    //读取本类目录下的text.txt文件
    String content = ContentReader.readText(Chinese.class);


    //接下来是标准的Lucene建立索引和检索的代码
    Directory ramDir = new RAMDirectory();
    IndexWriter writer = new IndexWriter(ramDir, analyzer, MaxFieldLength.UNLIMITED);
    Document doc = new Document();
    Field fd = new Field(FIELD_NAME, content, Field.Store.YES,
        Field.Index.ANALYZED, Field.TermVector.WITH_POSITIONS_OFFSETS);
    doc.add(fd);
    writer.addDocument(doc);
    writer.optimize();
    writer.close();


    IndexReader reader = IndexReader.open(ramDir);
    String queryString = QUERY;
    QueryParser parser = new QueryParser(Version.LUCENE_CURRENT, FIELD_NAME, analyzer);
    Query query = parser.parse(queryString);

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        try
        {
            Date start = new Date();


            writer = new IndexWriter(index, new StandardAnalyzer(), create);


            if (!create)
            {                 // delete stale docs
                deleting = true;
                indexDocs(root, index, create);

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    //txt = "2008年底发了资金吗";
    analyzer = new SimpleAnalyzer();
    analyzer = new ComplexAnalyzer();
    //analyzer = new MaxWordAnalyzer();
    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();
  }

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  public void testOverlapWithOffset() throws CorruptIndexException,
      LockObtainFailedException, IOException, InvalidTokenOffsetsException {
    final String TEXT = "the fox did not jump";
    final Directory directory = newDirectory();
    final IndexWriter indexWriter = new IndexWriter(directory,
        newIndexWriterConfig(TEST_VERSION_CURRENT, new OverlapAnalyzer()));
    try {
      final Document document = new Document();
      document.add(new Field(FIELD, new TokenStreamOverlap(),
          TermVector.WITH_OFFSETS));
      indexWriter.addDocument(document);
    } finally {
      indexWriter.close();
    }
    final IndexReader indexReader = IndexReader.open(directory, true);
    try {
      assertEquals(1, indexReader.numDocs());
      final IndexSearcher indexSearcher = newSearcher(indexReader);

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  public void testOverlapWithPositionsAndOffset() throws CorruptIndexException,
      LockObtainFailedException, IOException, InvalidTokenOffsetsException {
    final String TEXT = "the fox did not jump";
    final Directory directory = newDirectory();
    final IndexWriter indexWriter = new IndexWriter(directory,
        newIndexWriterConfig(TEST_VERSION_CURRENT, new OverlapAnalyzer()));
    try {
      final Document document = new Document();
      document.add(new Field(FIELD, new TokenStreamOverlap(),
          TermVector.WITH_POSITIONS_OFFSETS));
      indexWriter.addDocument(document);
    } finally {
      indexWriter.close();
    }
    final IndexReader indexReader = IndexReader.open(directory, true);
    try {
      assertEquals(1, indexReader.numDocs());
      final IndexSearcher indexSearcher = newSearcher(indexReader);

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  public void testOverlapWithOffsetExactPhrase() throws CorruptIndexException,
      LockObtainFailedException, IOException, InvalidTokenOffsetsException {
    final String TEXT = "the fox did not jump";
    final Directory directory = newDirectory();
    final IndexWriter indexWriter = new IndexWriter(directory,
        newIndexWriterConfig(TEST_VERSION_CURRENT, new OverlapAnalyzer()));
    try {
      final Document document = new Document();
      document.add(new Field(FIELD, new TokenStreamOverlap(),
          TermVector.WITH_OFFSETS));
      indexWriter.addDocument(document);
    } finally {
      indexWriter.close();
    }
    final IndexReader indexReader = IndexReader.open(directory, true);
    try {
      assertEquals(1, indexReader.numDocs());
      final IndexSearcher indexSearcher = newSearcher(indexReader);

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  public void testOverlapWithPositionsAndOffsetExactPhrase()
      throws CorruptIndexException, LockObtainFailedException, IOException,
      InvalidTokenOffsetsException {
    final String TEXT = "the fox did not jump";
    final Directory directory = newDirectory();
    final IndexWriter indexWriter = new IndexWriter(directory,
        newIndexWriterConfig(TEST_VERSION_CURRENT, new OverlapAnalyzer()));
    try {
      final Document document = new Document();
      document.add(new Field(FIELD, new TokenStreamOverlap(),
          TermVector.WITH_POSITIONS_OFFSETS));
      indexWriter.addDocument(document);
    } finally {
      indexWriter.close();
    }
    final IndexReader indexReader = IndexReader.open(directory, true);
    try {
      assertEquals(1, indexReader.numDocs());
      final IndexSearcher indexSearcher = newSearcher(indexReader);

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  }


  public void testMultiSearcher() throws Exception {
    // setup index 1
    Directory ramDir1 = newDirectory();
    IndexWriter writer1 = new IndexWriter(ramDir1, newIndexWriterConfig(
        TEST_VERSION_CURRENT, new StandardAnalyzer(TEST_VERSION_CURRENT)));
    Document d = new Document();
    Field f = new Field(FIELD_NAME, "multiOne", Field.Store.YES, Field.Index.ANALYZED);
    d.add(f);
    writer1.addDocument(d);
    writer1.optimize();
    writer1.close();
    IndexReader reader1 = IndexReader.open(ramDir1, true);


    // setup index 2
    Directory ramDir2 = newDirectory();
    IndexWriter writer2 = new IndexWriter(ramDir2, newIndexWriterConfig(
        TEST_VERSION_CURRENT, new StandardAnalyzer(TEST_VERSION_CURRENT)));
    d = new Document();
    f = new Field(FIELD_NAME, "multiTwo", Field.Store.YES, Field.Index.ANALYZED);
    d.add(f);
    writer2.addDocument(d);
    writer2.optimize();
    writer2.close();
    IndexReader reader2 = IndexReader.open(ramDir2, true);


    IndexSearcher searchers[] = new IndexSearcher[2];
    searchers[0] = new IndexSearcher(ramDir1, true);
    searchers[1] = new IndexSearcher(ramDir2, true);

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    doc.add( new Field( f, v, Store.YES, Index.ANALYZED ) );
    return doc;
  }
  
  private void makeIndex() throws IOException {
    IndexWriter writer = new IndexWriter(dir, new IndexWriterConfig(TEST_VERSION_CURRENT, new MockAnalyzer(random, MockTokenizer.WHITESPACE, false)));
    writer.addDocument( doc( "t_text1", "random words for highlighting tests del" ) );
    writer.addDocument( doc( "t_text1", "more random words for second field del" ) );
    writer.addDocument( doc( "t_text1", "random words for highlighting tests del" ) );
    writer.addDocument( doc( "t_text1", "more random words for second field" ) );
    writer.optimize();
    writer.close();
  }

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    writer.optimize();
    writer.close();
  }
  
  private void deleteDocument() throws IOException {
    IndexWriter writer = new IndexWriter(dir, new IndexWriterConfig(TEST_VERSION_CURRENT, new MockAnalyzer(random, MockTokenizer.WHITESPACE, false)).setOpenMode(OpenMode.APPEND));
    writer.deleteDocuments( new Term( "t_text1", "del" ) );
    // To see negative idf, keep comment the following line
    //writer.optimize();
    writer.close();
  }

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