Examples of org.apache.lucene.index.IndexWriterConfig

org.apache.lucene.index.IndexWriterConfig
Holds all the configuration of {@link IndexWriter}. You should instantiate this class, call the setters to set your configuration, then pass it to {@link IndexWriter}. Note that {@link IndexWriter} makes a private clone; ifyou need to subsequently change settings use {@link IndexWriter#getConfig}.
All setter methods return {@link IndexWriterConfig} to allow chainingsettings conveniently, for example:
```
 IndexWriterConfig conf = new IndexWriterConfig(analyzer); conf.setter1().setter2(); 
```
@since 3.1

  public void verifyCompiles() throws Exception {
    Analyzer analyzer = null;


    Directory fsDir = FSDirectory.open(new File("/path/to/index"));
    NRTCachingDirectory cachedFSDir = new NRTCachingDirectory(fsDir, 2.0, 25.0);
    IndexWriterConfig conf = new IndexWriterConfig(Version.LUCENE_32, analyzer);
    conf.setMergeScheduler(cachedFSDir.getMergeScheduler());
    IndexWriter writer = new IndexWriter(cachedFSDir, conf);
  }

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    make1dmfIndex( analyzerB, values );
  }
  
  // make 1 doc with multi valued field
  protected void make1dmfIndex( Analyzer analyzer, String... values ) throws Exception {
    IndexWriter writer = new IndexWriter(dir, new IndexWriterConfig(
        TEST_VERSION_CURRENT, analyzer).setOpenMode(OpenMode.CREATE));
    Document doc = new Document();
    for( String value: values )
      doc.add( new Field( F, value, Store.YES, Index.ANALYZED, TermVector.WITH_POSITIONS_OFFSETS ) );
    writer.addDocument( doc );

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    reader = IndexReader.open( dir, true );
  }
  
  // make 1 doc with multi valued & not analyzed field
  protected void make1dmfIndexNA( String... values ) throws Exception {
    IndexWriter writer = new IndexWriter(dir, new IndexWriterConfig(
        TEST_VERSION_CURRENT, analyzerK).setOpenMode(OpenMode.CREATE));
    Document doc = new Document();
    for( String value: values )
      doc.add( new Field( F, value, Store.YES, Index.NOT_ANALYZED, TermVector.WITH_POSITIONS_OFFSETS ) );
    writer.addDocument( doc );

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  private IndexSearcher getFullStrings() throws CorruptIndexException, LockObtainFailedException, IOException {
    Directory indexStore = newDirectory();
    dirs.add(indexStore);
    IndexWriter writer = new IndexWriter(
        indexStore,
        new IndexWriterConfig(TEST_VERSION_CURRENT, new MockAnalyzer(random)).
            setMaxBufferedDocs(4).
            setMergePolicy(newLogMergePolicy(97))
    );
    for (int i=0; i<NUM_STRINGS; i++) {
        Document doc = new Document();

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  public SingleFieldTestDb(Random random, String[] documents, String fName) {
    try {
      db = new MockDirectoryWrapper(random, new RAMDirectory());
      docs = documents;
      fieldName = fName;
      IndexWriter writer = new IndexWriter(db, new IndexWriterConfig(
          Version.LUCENE_CURRENT,
          new MockAnalyzer(random)));
      for (int j = 0; j < docs.length; j++) {
        Document d = new Document();
        d.add(new Field(fieldName, docs[j], Field.Store.NO, Field.Index.ANALYZED));

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    }
    
    Directory ramdir = newDirectory();
    Analyzer analyzer = randomAnalyzer();
    IndexWriter writer = new IndexWriter(ramdir,
                                         new IndexWriterConfig(TEST_VERSION_CURRENT, analyzer));
    Document doc = new Document();
    Field field1 = newField("foo", fooField.toString(), Field.Store.NO, Field.Index.ANALYZED);
    Field field2 = newField("term", termField.toString(), Field.Store.NO, Field.Index.ANALYZED);
    doc.add(field1);
    doc.add(field2);

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  }


  // LUCENE-1404
  public void testNPESpanQuery() throws Throwable {
    final Directory dir = newDirectory();
    final IndexWriter writer = new IndexWriter(dir, new IndexWriterConfig(
        TEST_VERSION_CURRENT, new MockAnalyzer(random)));


    // Add documents
    addDoc(writer, "1", "the big dogs went running to the market");
    addDoc(writer, "2", "the cat chased the mouse, then the cat ate the mouse quickly");

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    }
    */


    final LineFileDocs docs = new LineFileDocs(random);
    final int RUN_TIME_MSEC = atLeast(500);
    final IndexWriterConfig conf = newIndexWriterConfig(TEST_VERSION_CURRENT, new MockAnalyzer(random)).setMaxBufferedDocs(-1).setRAMBufferSizeMB(64);
    final File tempDir = _TestUtil.getTempDir("fstlines");
    final MockDirectoryWrapper dir = new MockDirectoryWrapper(random, FSDirectory.open(tempDir));
    final IndexWriter writer = new IndexWriter(dir, conf);
    writer.setInfoStream(VERBOSE ? System.out : null);
    final long stopTime = System.currentTimeMillis() + RUN_TIME_MSEC;

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    // modifications to the directory should be synchronized 
    synchronized (modifyCurrentIndexLock) {
      ensureOpen();
      if (!IndexReader.indexExists(spellIndexDir)) {
          IndexWriter writer = new IndexWriter(spellIndexDir,
            new IndexWriterConfig(Version.LUCENE_CURRENT,
                new WhitespaceAnalyzer(Version.LUCENE_CURRENT)));
          writer.close();
      }
      swapSearcher(spellIndexDir);
    }

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   */
  public void clearIndex() throws IOException {
    synchronized (modifyCurrentIndexLock) {
      ensureOpen();
      final Directory dir = this.spellIndex;
      final IndexWriter writer = new IndexWriter(dir, new IndexWriterConfig(
          Version.LUCENE_CURRENT,
          new WhitespaceAnalyzer(Version.LUCENE_CURRENT))
          .setOpenMode(OpenMode.CREATE));
      writer.close();
      swapSearcher(dir);

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