com.gemstone.gemfire.cache.lucene.internal.repository.IndexRepositoryImpl.java Source code

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Here is the source code for com.gemstone.gemfire.cache.lucene.internal.repository.IndexRepositoryImpl.java

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/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 * 
 *   http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */

package com.gemstone.gemfire.cache.lucene.internal.repository;

import java.io.IOException;

import org.apache.lucene.document.Document;
import org.apache.lucene.index.IndexWriter;
import org.apache.lucene.index.Term;
import org.apache.lucene.search.IndexSearcher;
import org.apache.lucene.search.Query;
import org.apache.lucene.search.ScoreDoc;
import org.apache.lucene.search.SearcherManager;
import org.apache.lucene.search.TopDocs;

import com.gemstone.gemfire.cache.Region;
import com.gemstone.gemfire.cache.lucene.internal.repository.serializer.LuceneSerializer;
import com.gemstone.gemfire.cache.lucene.internal.repository.serializer.SerializerUtil;

/**
 * A repository that writes to a single lucene index writer
 */
public class IndexRepositoryImpl implements IndexRepository {

    private static final boolean APPLY_ALL_DELETES = System
            .getProperty("gemfire.IndexRepository.APPLY_ALL_DELETES", "true").equalsIgnoreCase("true");

    private final IndexWriter writer;
    private final LuceneSerializer serializer;
    private final SearcherManager searcherManager;
    private Region<?, ?> region;

    public IndexRepositoryImpl(Region<?, ?> region, IndexWriter writer, LuceneSerializer serializer)
            throws IOException {
        this.region = region;
        this.writer = writer;
        searcherManager = new SearcherManager(writer, APPLY_ALL_DELETES, null);
        this.serializer = serializer;
    }

    @Override
    public void create(Object key, Object value) throws IOException {
        Document doc = new Document();
        SerializerUtil.addKey(key, doc);
        serializer.toDocument(value, doc);
        writer.addDocument(doc);
    }

    @Override
    public void update(Object key, Object value) throws IOException {
        Document doc = new Document();
        SerializerUtil.addKey(key, doc);
        serializer.toDocument(value, doc);
        writer.updateDocument(SerializerUtil.getKeyTerm(doc), doc);
    }

    @Override
    public void delete(Object key) throws IOException {
        Term keyTerm = SerializerUtil.toKeyTerm(key);
        writer.deleteDocuments(keyTerm);
    }

    @Override
    public void query(Query query, int limit, IndexResultCollector collector) throws IOException {
        IndexSearcher searcher = searcherManager.acquire();
        try {
            TopDocs docs = searcher.search(query, limit);
            for (ScoreDoc scoreDoc : docs.scoreDocs) {
                Document doc = searcher.doc(scoreDoc.doc);
                Object key = SerializerUtil.getKey(doc);
                collector.collect(key, scoreDoc.score);
            }
        } finally {
            searcherManager.release(searcher);
        }
    }

    @Override
    public synchronized void commit() throws IOException {
        writer.commit();
        searcherManager.maybeRefresh();
    }

    public IndexWriter getWriter() {
        return writer;
    }

    public LuceneSerializer getSerializer() {
        return serializer;
    }

    @Override
    public boolean isClosed() {
        return region.isDestroyed();
    }
}