Java tutorial
/* * * $Date$ * $Author$ * $Revision$ * * Copyright 2011,2012 the University of New Mexico. * * This work was supported by National Science Foundation Cooperative * Agreements #DEB-0832652 and #DEB-0936498. * * 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 edu.lternet.pasta.portal; import java.io.IOException; import javax.servlet.RequestDispatcher; import javax.servlet.ServletException; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import javax.servlet.http.HttpSession; import org.apache.commons.configuration.PropertiesConfiguration; import org.apache.log4j.Logger; import edu.lternet.pasta.client.DataPackageManagerClient; import edu.lternet.pasta.client.ResultSetUtility; import edu.lternet.pasta.portal.search.Search; import edu.lternet.pasta.portal.search.SimpleSearch; import edu.lternet.pasta.portal.search.TermsList; import edu.lternet.pasta.portal.user.SavedData; public class SimpleSearchServlet extends DataPortalServlet { /* * Class variables */ private static final Logger logger = Logger.getLogger(edu.lternet.pasta.portal.SimpleSearchServlet.class); private static final long serialVersionUID = 1L; private static String cwd = null; private static String xslpath = null; private static final String forward = "./searchResult.jsp"; /* * Instance variables */ /** * Constructor of the object. */ public SimpleSearchServlet() { super(); } /** * Destruction of the servlet. <br> */ public void destroy() { super.destroy(); // Just puts "destroy" string in log // Put your code here } /** * The doGet method of the servlet. <br> * * This method is called when a form has its tag value method equals to get. * * @param request * the request send by the client to the server * @param response * the response send by the server to the client * @throws ServletException * if an error occurred * @throws IOException * if an error occurred */ public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { doPost(request, response); } /** * The doPost method of the servlet. <br> * * This method is called when a form has its tag value method equals to post. * * @param request * the request send by the client to the server * @param response * the response send by the server to the client * @throws ServletException * if an error occurred * @throws IOException * if an error occurred */ public void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { String termsListHTML = ""; String htmlTable = ""; String mapButtonHTML = ""; String relevanceHTML = ""; HttpSession httpSession = request.getSession(); ResultSetUtility resultSetUtility = null; String uid = (String) httpSession.getAttribute("uid"); if (uid == null || uid.isEmpty()) uid = "public"; String userInput = (String) request.getParameter("terms"); String start = (String) request.getParameter("start"); String rows = (String) request.getParameter("rows"); String sort = (String) request.getParameter("sort"); if (sort == null || sort.equals("")) { sort = Search.DEFAULT_SORT; } if (userInput == null || userInput.equals("")) { String queryText = null; String q = (String) request.getParameter("q"); if (q == null || q.equals("")) { // if no q param was passed, look for query stored in the session queryText = (String) httpSession.getAttribute("queryText"); termsListHTML = (String) httpSession.getAttribute("termsListHTML"); } else { queryText = q; } if (queryText != null) { queryText = String.format("%s&start=%s&rows=%s&sort=%s", queryText, start, rows, sort); resultSetUtility = executeQuery(uid, queryText, sort); if (resultSetUtility != null) { mapButtonHTML = resultSetUtility.getMapButtonHTML(); relevanceHTML = resultSetUtility.getRelevanceHTML(); htmlTable = resultSetUtility.getHTMLTable(); } } } else { SimpleSearch simpleSearch = new SimpleSearch(); String queryText = simpleSearch.buildSolrQuery(userInput, false); TermsList termsList = simpleSearch.getTermsList(); termsListHTML = termsList.toHTML(); httpSession.setAttribute("termsListHTML", termsListHTML); httpSession.setAttribute("queryText", queryText); queryText = String.format("%s&start=%d&rows=%d&sort=%s", queryText, 0, Search.DEFAULT_ROWS, sort); resultSetUtility = executeQuery(uid, queryText, sort); if (resultSetUtility != null) { mapButtonHTML = resultSetUtility.getMapButtonHTML(); //relevanceHTML = resultSetUtility.getRelevanceHTML(); htmlTable = resultSetUtility.getHTMLTable(); } } request.setAttribute("mapButtonHTML", mapButtonHTML); request.setAttribute("relevanceHTML", relevanceHTML); request.setAttribute("searchresult", htmlTable); RequestDispatcher requestDispatcher = request.getRequestDispatcher(forward); requestDispatcher.forward(request, response); } /* * Executes the query via the DataPackageManagerClient object */ private ResultSetUtility executeQuery(String uid, String queryText, String sort) throws ServletException { ResultSetUtility resultSetUtility = null; try { DataPackageManagerClient dpmClient = new DataPackageManagerClient(uid); String xml = dpmClient.searchDataPackages(queryText); if (uid.equals("public")) { resultSetUtility = new ResultSetUtility(xml, sort); } else { boolean isSavedDataPage = false; SavedData savedData = new SavedData(uid); resultSetUtility = new ResultSetUtility(xml, sort, savedData, isSavedDataPage); } resultSetUtility.xmlToHtmlTable(cwd + xslpath); } catch (Exception e) { handleDataPortalError(logger, e); } return resultSetUtility; } /** * Initialization of the servlet. <br> * * @throws ServletException * if an error occurs */ public void init() throws ServletException { PropertiesConfiguration options = ConfigurationListener.getOptions(); xslpath = options.getString("resultsetutility.xslpath"); logger.debug("XSLPATH: " + xslpath); cwd = options.getString("system.cwd"); logger.debug("CWD: " + cwd); } }