Java tutorial
/******************************************************************************* * Gisgraphy Project * * 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA * * Copyright 2008 Gisgraphy project * David Masclet <davidmasclet@gisgraphy.com> * * *******************************************************************************/ package com.gisgraphy.domain.geoloc.service.fulltextsearch; import java.io.ByteArrayOutputStream; import java.io.OutputStream; import java.io.UnsupportedEncodingException; import java.net.MalformedURLException; import java.util.ArrayList; import java.util.List; import javax.annotation.Resource; import org.apache.commons.httpclient.HttpClient; import org.apache.commons.httpclient.MultiThreadedHttpConnectionManager; import org.apache.solr.client.solrj.SolrServerException; import org.apache.solr.client.solrj.impl.CommonsHttpSolrServer; import org.apache.solr.client.solrj.response.QueryResponse; import org.apache.solr.common.SolrDocument; import org.apache.solr.common.params.ModifiableSolrParams; import org.slf4j.Logger; import org.slf4j.LoggerFactory; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.beans.factory.annotation.Qualifier; import org.springframework.beans.factory.annotation.Required; import org.springframework.util.Assert; import com.gisgraphy.domain.geoloc.entity.GisFeature; import com.gisgraphy.domain.repository.GisFeatureDao; import com.gisgraphy.domain.valueobject.Constants; import com.gisgraphy.domain.valueobject.FulltextResultsDto; import com.gisgraphy.fulltext.service.exception.FullTextSearchException; import com.gisgraphy.service.IStatsUsageService; import com.gisgraphy.service.exception.ServiceException; import com.gisgraphy.stats.StatsUsageType; /** * Default (threadsafe) implementation of {@link IFullTextSearchEngine} * * @author <a href="mailto:david.masclet@gisgraphy.com">David Masclet</a> */ public class FullTextSearchEngine implements IFullTextSearchEngine { protected static final Logger logger = LoggerFactory.getLogger(FullTextSearchEngine.class); private HttpClient httpClient; private IsolrClient solrClient; @Autowired @Qualifier("gisFeatureDao") private GisFeatureDao gisFeatureDao; @Resource IStatsUsageService statsUsageService; /** * Default constructor needed by cglib and spring */ @SuppressWarnings("unused") private FullTextSearchEngine() { super(); } /** * @param multiThreadedHttpConnectionManager * The * @link {@link MultiThreadedHttpConnectionManager} that the fulltext search * engine will use * @throws FullTextSearchException * If an error occured */ @Autowired public FullTextSearchEngine( @Qualifier("multiThreadedHttpConnectionManager") MultiThreadedHttpConnectionManager multiThreadedHttpConnectionManager) throws FullTextSearchException { Assert.notNull(multiThreadedHttpConnectionManager, "multiThreadedHttpConnectionManager can not be null"); this.httpClient = new HttpClient(multiThreadedHttpConnectionManager); if (this.httpClient == null) { throw new FullTextSearchException( "Can not instanciate http client with multiThreadedHttpConnectionManager : " + multiThreadedHttpConnectionManager); } } /* * (non-Javadoc) * * @see com.gisgraphy.domain.geoloc.service.fulltextsearch.IFullTextSearchEngine#executeAndSerialize(com.gisgraphy.domain.geoloc.service.fulltextsearch.FulltextQuery, * java.io.OutputStream) */ public void executeAndSerialize(FulltextQuery query, OutputStream outputStream) throws FullTextSearchException { statsUsageService.increaseUsage(StatsUsageType.FULLTEXT); Assert.notNull(query, "Can not execute a null query"); Assert.notNull(outputStream, "Can not serialize into a null outputStream"); try { logger.info(query.toString()); ModifiableSolrParams params = query.parameterize(); CommonsHttpSolrServer server = new CommonsHttpSolrServer(solrClient.getURL(), this.httpClient, new OutputstreamResponseWrapper(outputStream, params.get(Constants.OUTPUT_FORMAT_PARAMETER))); server.query(params); } catch (SolrServerException e) { logger.error("Can not execute query " + query.toQueryString() + "for URL : " + solrClient.getURL() + " : " + e.getCause().getMessage()); throw new FullTextSearchException(e.getCause().getMessage()); } catch (MalformedURLException e1) { logger.error("The URL " + solrClient.getURL() + " is incorrect"); throw new FullTextSearchException(e1); } catch (RuntimeException e2) { logger.error("An error has occurred during fulltext search of query " + query + " : " + e2.getCause().getMessage()); throw new FullTextSearchException(e2.getCause().getMessage()); } } /* * (non-Javadoc) * * @see com.gisgraphy.domain.geoloc.service.fulltextsearch.IFullTextSearchEngine#executeQueryToString(com.gisgraphy.domain.geoloc.service.fulltextsearch.FulltextQuery) */ public String executeQueryToString(FulltextQuery query) { try { ByteArrayOutputStream outputStream = new ByteArrayOutputStream(); executeAndSerialize(query, outputStream); return outputStream.toString(Constants.CHARSET); } catch (UnsupportedEncodingException e) { throw new FullTextSearchException("Encoding error during search : " + e.getCause().getMessage()); } } /* * (non-Javadoc) * * @see com.gisgraphy.domain.geoloc.service.fulltextsearch.IFullTextSearchEngine#executeQuery(com.gisgraphy.domain.geoloc.service.fulltextsearch.FulltextQuery) */ public List<? extends GisFeature> executeQueryToDatabaseObjects(FulltextQuery query) throws ServiceException { statsUsageService.increaseUsage(StatsUsageType.FULLTEXT); Assert.notNull(query, "Can not execute a null query"); ModifiableSolrParams params = query.parameterize(); List<GisFeature> gisFeatureList = new ArrayList<GisFeature>(); QueryResponse results = null; try { results = solrClient.getServer().query(params); logger.info(query + " took " + (results.getQTime()) + " ms and returns " + results.getResults().getNumFound() + " results"); List<Long> ids = new ArrayList<Long>(); for (SolrDocument doc : results.getResults()) { ids.add((Long) doc.getFieldValue(FullTextFields.FEATUREID.getValue())); } gisFeatureList = gisFeatureDao.listByFeatureIds(ids); } catch (Exception e) { logger.error("An error has occurred during fulltext search to database object for query " + query + " : " + e.getCause().getMessage()); throw new FullTextSearchException(e); } return gisFeatureList; } public FulltextResultsDto executeQuery(FulltextQuery query) throws ServiceException { statsUsageService.increaseUsage(StatsUsageType.FULLTEXT); Assert.notNull(query, "Can not execute a null query"); ModifiableSolrParams params = query.parameterize(); QueryResponse response = null; try { response = solrClient.getServer().query(params); } catch (SolrServerException e) { throw new FullTextSearchException(e.getMessage(), e); } catch (RuntimeException e) { throw new FullTextSearchException(e.getMessage(), e); } if (response != null) { long numberOfResults = response.getResults() != null ? response.getResults().getNumFound() : 0; logger.info(query + " took " + response.getQTime() + " ms and returns " + numberOfResults + " results"); return new FulltextResultsDto(response); } else { return new FulltextResultsDto(); } } /* * (non-Javadoc) * * @see com.gisgraphy.domain.geoloc.service.fulltextsearch.IFullTextSearchEngine#isAlive() */ public boolean isAlive() { return solrClient == null ? false : solrClient.isServerAlive(); } /** * @param solrClient * the solrClient to set */ @Required public void setSolrClient(IsolrClient solrClient) { this.solrClient = solrClient; } /* * (non-Javadoc) * * @see com.gisgraphy.domain.geoloc.service.fulltextsearch.IFullTextSearchEngine#getURL() */ public String getURL() { return solrClient.getURL(); } }