/**
* 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 org.apache.lucene.gdata.server;
import java.io.IOException;
import java.util.List;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.lucene.gdata.data.ServerBaseEntry;
import org.apache.lucene.gdata.data.ServerBaseFeed;
import org.apache.lucene.gdata.search.GDataSearcher;
import org.apache.lucene.gdata.search.SearchComponent;
import org.apache.lucene.gdata.search.query.GDataQueryParser;
import org.apache.lucene.gdata.server.registry.ComponentType;
import org.apache.lucene.gdata.server.registry.GDataServerRegistry;
import org.apache.lucene.gdata.server.registry.ProvidedService;
import org.apache.lucene.gdata.storage.StorageException;
import org.apache.lucene.queryParser.ParseException;
import org.apache.lucene.queryParser.QueryParser;
import org.apache.lucene.search.Query;
import com.google.gdata.data.BaseEntry;
import com.google.gdata.data.BaseFeed;
/**
* @author Simon Willnauer
*
*/
public class GDataSearchService extends GDataService {
private static final Log LOG = LogFactory.getLog(GDataSearchService.class);
private static SearchComponent SEARCHCOMPONENT;
private GDataSearcher<String> searcher;
protected GDataSearchService() throws ServiceException {
if(SEARCHCOMPONENT == null)
SEARCHCOMPONENT = GDataServerRegistry.getRegistry().lookup(SearchComponent.class,ComponentType.SEARCHCONTROLLER);
}
/**
* @see org.apache.lucene.gdata.server.GDataService#getFeed(org.apache.lucene.gdata.server.GDataRequest, org.apache.lucene.gdata.server.GDataResponse)
*/
@SuppressWarnings("unchecked")
@Override
public BaseFeed getFeed(GDataRequest request, GDataResponse response) throws ServiceException {
String translatedQuery = request.getTranslatedQuery();
ProvidedService service = request.getConfigurator();
QueryParser parser = new GDataQueryParser(service.getIndexSchema());
Query query;
try {
query = parser.parse(translatedQuery);
} catch (ParseException e1) {
throw new ServiceException("Search Failed -- Can not parse query",e1,GDataResponse.BAD_REQUEST);
}
if(LOG.isInfoEnabled())
LOG.info("Fire search for user query query: "+query.toString());
this.searcher = SEARCHCOMPONENT.getServiceSearcher(service);
List<String> result;
try {
result = this.searcher.search(query,request.getItemsPerPage(),request.getStartIndex(),request.getFeedId());
} catch (IOException e) {
throw new ServiceException("Search Failed -- Searcher throws IOException",e,GDataResponse.SERVER_ERROR);
}
if(LOG.isInfoEnabled())
LOG.info("Fetching results for user query result size: "+result.size());
ServerBaseFeed requestFeed = new ServerBaseFeed();
requestFeed.setServiceConfig(service);
requestFeed.setStartIndex(0);
requestFeed.setItemsPerPage(0);
requestFeed.setId(request.getFeedId());
BaseFeed feed = null;
try{
feed = this.storage.getFeed(requestFeed);
}catch (StorageException e) {
throw new ServiceException("Search Failed -- can not get feed, feed not stored ",e,GDataResponse.NOT_FOUND);
}
for (String entryId : result) {
ServerBaseEntry requestEntry = new ServerBaseEntry();
requestEntry.setId(entryId);
requestEntry.setServiceConfig(service);
try{
BaseEntry entry = this.storage.getEntry(requestEntry);
feed.getEntries().add(entry);
}catch (StorageException e) {
LOG.error("StorageException caught while fetching query results -- skip entry -- "+e.getMessage(),e);
}
}
dynamicElementFeedStragey(feed,request);
return feed;
}
}