Examples of org.apache.lucene.index.IndexModifier

org.apache.lucene.index.IndexModifier

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     Analyzer analyzer = new StandardAnalyzer();
     // create an index in /tmp/index, overwriting an existing one:
     IndexModifier indexModifier = new IndexModifier("/tmp/index", analyzer, true);
     Document doc = new Document();
     doc.add(new Field("id", "1", Field.Store.YES, Field.Index.UN_TOKENIZED));
     doc.add(new Field("body", "a simple test", Field.Store.YES, Field.Index.TOKENIZED));
     indexModifier.addDocument(doc);
     int deleted = indexModifier.delete(new Term("id", "1"));
     System.out.println("Deleted " + deleted + " document");
     indexModifier.flush();
     System.out.println(indexModifier.docCount() + " docs in index");
     indexModifier.close();

Not all methods of IndexReader and IndexWriter are offered by this class. If you need access to additional methods, either use those classes directly or implement your own class that extends IndexModifier.

Although an instance of this class can be used from more than one thread, you will not get the best performance. You might want to use IndexReader and IndexWriter directly for that (but you will need to care about synchronization yourself then).

While you can freely mix calls to add() and delete() using this class, you should batch you calls for best performance. For example, if you want to update 20 documents, you should first delete all those documents, then add all the new documents. @author Daniel Naber

          if(this.isClosed.get())
            throw new IllegalStateException("StorageController is already closed -- server is shutting down");
          if (LOG.isInfoEnabled())
              LOG.info("new IndexModifier created - release to StorageModifier");
        
            return new IndexModifier(this.storageDir, new StandardAnalyzer(),
                    false);
        }finally{
            try{
                this.closeCondition.signalAll();
                }catch (Throwable e) {/**/}

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            }
        }
    }


    public void testIndexWriterLockRelease() throws IOException {
        IndexModifier im;


        try {
            im = new IndexModifier(this.__test_dir, new org.apache.lucene.analysis.standard.StandardAnalyzer(), false);
        } catch (FileNotFoundException e) {
            try {
                im = new IndexModifier(this.__test_dir, new org.apache.lucene.analysis.standard.StandardAnalyzer(), false);
            } catch (FileNotFoundException e1) {
            }
        }
    }

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    }


    public void modifyRecords( Collection records )
        throws RepositoryIndexException
    {
        IndexModifier indexModifier = null;
        try
        {
            indexModifier = new IndexModifier( indexLocation, indexHandlers.getAnalyzer(), !exists() );
            indexModifier.setMaxFieldLength( MAX_FIELD_LENGTH );


            for ( Iterator i = records.iterator(); i.hasNext(); )
            {
                LuceneRepositoryContentRecord record = (LuceneRepositoryContentRecord) i.next();


                if ( record != null )
                {
                    Term term = new Term( LuceneDocumentMaker.PRIMARY_KEY, record.getPrimaryKey() );


                    indexModifier.deleteDocuments( term );


                    Document document = indexHandlers.getConverter().convert( record );


                    indexModifier.addDocument( document );
                }
            }
            indexModifier.optimize();
        }
        catch ( IOException e )
        {
            throw new RepositoryIndexException( "Error updating index: " + e.getMessage(), e );
        }

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    }


    public void modifyRecord( LuceneRepositoryContentRecord record )
        throws RepositoryIndexException
    {
        IndexModifier indexModifier = null;
        try
        {
            indexModifier = new IndexModifier( indexLocation, indexHandlers.getAnalyzer(), !exists() );
            indexModifier.setMaxFieldLength( MAX_FIELD_LENGTH );


            if ( record != null )
            {
                Term term = new Term( LuceneDocumentMaker.PRIMARY_KEY, record.getPrimaryKey() );


                indexModifier.deleteDocuments( term );


                Document document = indexHandlers.getConverter().convert( record );


                indexModifier.addDocument( document );
            }
            indexModifier.optimize();
        }
        catch ( IOException e )
        {
            throw new RepositoryIndexException( "Error updating index: " + e.getMessage(), e );
        }

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    }


    public void indexArtifacts( List artifacts, RepositoryIndexRecordFactory factory )
        throws RepositoryIndexException
    {
        IndexModifier indexModifier = null;
        try
        {
            indexModifier = new IndexModifier( indexLocation, getAnalyzer(), !exists() );


            for ( Iterator i = artifacts.iterator(); i.hasNext(); )
            {
                Artifact artifact = (Artifact) i.next();
                RepositoryIndexRecord record = factory.createRecord( artifact );


                if ( record != null )
                {
                    Term term = new Term( FLD_PK, record.getPrimaryKey() );


                    indexModifier.deleteDocuments( term );


                    Document document = converter.convert( record );
                    document.add(
                        new Field( FLD_PK, record.getPrimaryKey(), Field.Store.NO, Field.Index.UN_TOKENIZED ) );


                    indexModifier.addDocument( document );
                }
            }
            indexModifier.optimize();
        }
        catch ( IOException e )
        {
            throw new RepositoryIndexException( "Error updating index: " + e.getMessage(), e );
        }

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    }
    
    public void indexArtifact( Artifact artifact, RepositoryIndexRecordFactory factory )
        throws RepositoryIndexException
    {
        IndexModifier indexModifier = null;
        try
        {
            indexModifier = new IndexModifier( indexLocation, getAnalyzer(), !exists() );


            RepositoryIndexRecord record = factory.createRecord( artifact );


            if ( record != null )
            {
                Term term = new Term( FLD_PK, record.getPrimaryKey() );


                indexModifier.deleteDocuments( term );


                Document document = converter.convert( record );
                document.add( new Field( FLD_PK, record.getPrimaryKey(), Field.Store.NO, Field.Index.UN_TOKENIZED ) );


                indexModifier.addDocument( document );
            }
            indexModifier.optimize();
        }
        catch ( IOException e )
        {
            throw new RepositoryIndexException( "Error updating index: " + e.getMessage(), e );
        }

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                try {
                    //## LUCENE2 begin ##
                    boolean recreate = !IndexReader.indexExists(path);
                    Analyzer analyzer = new StandardAnalyzer();
                    access = new IndexAccess();
                    access.modifier = new IndexModifier(path, analyzer, recreate);
                    //## LUCENE2 end ##
                    /*## LUCENE3 begin ##
                    File f = new File(path);
                    Directory indexDir = FSDirectory.open(f);
                    boolean recreate = !IndexReader.indexExists(indexDir);

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