almira.sample.dao.CatapultDaoHibernateSearch.java Source code

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Here is the source code for almira.sample.dao.CatapultDaoHibernateSearch.java

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/*
 * Copyright 2008-2012 the original author or authors.
 *
 * Licensed 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 almira.sample.dao;

import java.util.List;

import javax.persistence.Query;

import org.apache.lucene.analysis.standard.StandardAnalyzer;
import org.apache.lucene.queryParser.ParseException;
import org.apache.lucene.queryParser.QueryParser;
import org.apache.lucene.util.Version;
import org.hibernate.search.MassIndexer;
import org.hibernate.search.jpa.FullTextEntityManager;
import org.hibernate.search.jpa.Search;
import org.slf4j.Logger;
import org.springframework.stereotype.Repository;
import org.springframework.transaction.annotation.Propagation;
import org.springframework.transaction.annotation.Transactional;

import almira.sample.domain.Catapult;
import almira.sample.util.Log;

/**
 * If you add custom functions, also create the corresponding interface.
 *
 * Here it is important to map against the 'Catapult' entity because Hibernate
 * cannot map the interface.
 *
 * @author Daniel TISCHER
 */
@Repository("catapultDaoHibernateSearch")
public final class CatapultDaoHibernateSearch extends AbstractDaoHibernate<Catapult, Long>
        implements DaoHibernateSearch<Catapult, Long> {

    private static final Version LUCENE_VERSION = Version.LUCENE_33;

    // Injected by LogPostProcessor
    @Log
    private Logger log;

    // http://www.skill-guru.com/blog/2010/07/19/integrting-hibernate-search-with-a-spring-and-jpa-application/
    private FullTextEntityManager getFullTextEntityManager() {
        return Search.getFullTextEntityManager(getEntityManager());
    }

    @Override
    public void purgeIndex() {
        getFullTextEntityManager().purgeAll(Catapult.class);
        getFullTextEntityManager().getSearchFactory().optimize(Catapult.class);
        log.info("Purged Lucene index.");
    }

    @Override
    // The MassIndexer was designed for speed and is unaware of transactions.
    // http://docs.jboss.org/hibernate/search/3.2/reference/en/html/manual-index-changes.html
    @Transactional(propagation = Propagation.NOT_SUPPORTED)
    public void rebuildIndex() throws InterruptedException {
        log.info("Index rebuild started...");
        MassIndexer indexer = getFullTextEntityManager().createIndexer();
        indexer.purgeAllOnStart(true);
        indexer.optimizeOnFinish(true);
        indexer.startAndWait();
    }

    @Override
    @SuppressWarnings("unchecked")
    public List<Catapult> searchByName(final String searchQuery, final int startIndex, final int fetchSize)
            throws ParseException {

        Query query = createQuery(searchQuery);
        query.setFirstResult(startIndex).setMaxResults(fetchSize);
        return query.getResultList();
    }

    @Override
    public void flushToIndexes() {
        getFullTextEntityManager().flushToIndexes();
    }

    @Override
    public long countByName(String searchQuery) throws ParseException {
        if (null == searchQuery) {
            throw new IllegalArgumentException("searchQuery can't be null");
        }
        // TODO: not very efficient way of counting results...
        // Have a look at [Bauer07] page 677 (TIP)
        return createQuery(searchQuery).getResultList().size();
    }

    private Query createQuery(final String searchQuery) throws ParseException {
        QueryParser parser = new QueryParser(LUCENE_VERSION, "name", new StandardAnalyzer(LUCENE_VERSION));

        return getFullTextEntityManager().createFullTextQuery(parser.parse(searchQuery), Catapult.class);
    }
}