/**
* Vosao CMS. Simple CMS for Google App Engine.
*
* Copyright (C) 2009-2010 Vosao development team.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*
* email: vosao.dev@gmail.com
*/
package org.vosao.search.impl;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.vosao.business.Business;
import org.vosao.business.mq.QueueSpeed;
import org.vosao.business.mq.Topic;
import org.vosao.business.mq.message.IndexMessage;
import org.vosao.business.mq.message.PageMessage;
import org.vosao.common.VosaoContext;
import org.vosao.dao.Dao;
import org.vosao.entity.LanguageEntity;
import org.vosao.entity.PageEntity;
import org.vosao.search.Hit;
import org.vosao.search.SearchEngine;
import org.vosao.search.SearchIndex;
import org.vosao.search.SearchResult;
import org.vosao.search.SearchResultFilter;
import org.vosao.utils.ListUtil;
/**
*
* @author Alexander Oleynik
*
*/
public class SearchEngineImpl implements SearchEngine {
private static final Log logger = LogFactory.getLog(
SearchEngineImpl.class);
private Map<String, SearchIndex> indexes;
private SearchIndex getSearchIndex(String language) {
if (indexes == null) {
indexes = new HashMap<String, SearchIndex>();
}
if (!indexes.containsKey(language)) {
indexes.put(language, new SearchIndexImpl(language));
}
return indexes.get(language);
}
@Override
public void reindex() {
for (LanguageEntity language : getDao().getLanguageDao().select()) {
getSearchIndex(language.getCode()).clear();
getSearchIndex(language.getCode()).saveIndex();
}
getBusiness().getMessageQueue().publish(new IndexMessage());
}
@Override
public SearchResult search(SearchResultFilter filter, String query,
int start, int count, String language, int textSize) {
// Search in language index first for all results
List<Hit> hits = getSearchIndex(language).search(filter, query, textSize);
// Search in all other languages for all results
for (LanguageEntity lang : getDao().getLanguageDao().select()) {
if (!lang.getCode().equals(language)) {
hits.addAll(getSearchIndex(lang.getCode()).search(filter, query,
textSize));
}
}
// paginate result and return
SearchResult result = new SearchResult();
result.setCount(hits.size());
int startIndex = start < hits.size() ? start : hits.size();
int endIndex = startIndex + count;
if (count == -1) {
endIndex = hits.size();
}
if (endIndex > hits.size()) {
endIndex = hits.size();
}
result.setHits(ListUtil.slice(hits, startIndex, count));
return result;
}
@Override
public void updateIndex(Long pageId) {
for (LanguageEntity language : getDao().getLanguageDao().select()) {
getSearchIndex(language.getCode()).updateIndex(pageId);
}
}
@Override
public void removeFromIndex(Long pageId) {
for (LanguageEntity language : getDao().getLanguageDao().select()) {
getSearchIndex(language.getCode()).removeFromIndex(pageId);
}
}
@Override
public void saveIndex() {
for (LanguageEntity language : getDao().getLanguageDao().select()) {
getSearchIndex(language.getCode()).saveIndex();
}
}
private Business getBusiness() {
return VosaoContext.getInstance().getBusiness();
}
private Dao getDao() {
return getBusiness().getDao();
}
}