Java tutorial
/* * Copyright (C) 1999-2007 <a href="mailto:adrian.paschke@gmx.de">Adrian Paschke</a> * * This servlet is part of the Rule Based Service Level Agreement (RBSLA) * framework, available at * <a href=" http://ibis.in.tum.de/staff/paschke/rbsla/index.htm">RBSLA</a> * * 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 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 */ package pa_SymposiumPlanner; import javax.swing.*; import javax.swing.tree.*; import javax.servlet.*; import javax.servlet.http.*; import java.io.*; import java.net.URL; import nu.xom.*; import jdrew.oo.td.*; import jdrew.oo.util.*; import java.util.*; import pa_Configuration.BadConfigurationException; import pa_Configuration.PAConfiguration; import org.apache.commons.httpclient.*; import org.apache.commons.httpclient.methods.*; import javax.servlet.http.HttpServlet; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import javax.servlet.*; import com.oreilly.servlet.HttpMessage; public class RuleML2010ProgramChair extends HttpServlet { private final String instantiation = "SymposiumPlanner10"; private final String topic = "ProgramChair"; private String address; private String port; private String poslAddress; private String rdfAddress; private String messageEndpoint; public void init(ServletConfig config) throws ServletException { super.init(config); } //**// //**// ///////////////////////// public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { response.setContentType("text/html"); PrintWriter out = response.getWriter(); //System.out.println("Panel Chair Servlet RuleML-2010"); //out.println("Panel Chair Servlet RuleML-2010"); Calendar cal = new GregorianCalendar(); int year = cal.get(Calendar.YEAR); int month = cal.get(Calendar.MONTH) + 1; int day = cal.get(Calendar.DAY_OF_MONTH); String date; if (month == 10 || month == 11 || month == 12) { date = "" + year + month + day; } else { date = "" + year + "0" + month + day; } date = "date(" + date + ":integer)."; System.out.println("Panel Chair Servlet Console update:"); System.out.println(date); } ///////////////////////// public void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { response.setContentType("text/html; charset=UTF-8"); PrintWriter out = response.getWriter(); try { address = PAConfiguration.getAddress(); port = PAConfiguration.getPort(instantiation); poslAddress = PAConfiguration.getPOSL(instantiation, topic); rdfAddress = PAConfiguration.getRDFTaxonomy(instantiation); messageEndpoint = PAConfiguration.getEndpointName(instantiation, topic); } catch (BadConfigurationException e) { System.out.println(e.getMessage()); e.printStackTrace(); System.exit(0); } try { System.out.println("Panel Chair Servlet"); System.out.println(response.toString()); BufferedReader brd = request.getReader(); String input = ""; String message = ""; while (!input.equals("</RuleML>")) { input = brd.readLine(); message = message + input; } String[] varOrder = getVariableOrder(message); System.out.println("Received Message: " + message); // BackwardReasoner br = new BackwardReasoner(); // Iterator solit =null; // DefiniteClause dc = null; // SymbolTable.reset(); POSLParser pp = new POSLParser(); // String contents = "c(a).\nc(b).\nc(c)."; Date t1 = new GregorianCalendar().getTime(); //System.out.println(t1.getHours() + ":" + t1.getMinutes()); //append time to contents //System.out.println("day: " + t1.getDay()); //System.out.println("day: " + t1.getYear()); //System.out.println("day: " + t1.getMonth()); //time String time = "time(" + t1.getHours() + ":integer)."; System.out.println(time); String url = poslAddress; //String url = "http://www.jdrew.org/oojdrew/test.posl"; String contents = ""; //day of the week int day = t1.getDay(); boolean weekday = true; if (day == 0 || day == 6) { weekday = false; } String dayOfWeek; if (weekday) { dayOfWeek = "day(weekday)."; } else { dayOfWeek = "day(weekend)."; } //full date Calendar cal = new GregorianCalendar(); int year = cal.get(Calendar.YEAR); int month = cal.get(Calendar.MONTH) + 1; int day2 = cal.get(Calendar.DAY_OF_MONTH); String date; String day3 = "" + day2; if (day2 == 1 || day2 == 2 || day2 == 3 || day2 == 4 || day2 == 5 || day2 == 6 || day2 == 7 || day2 == 8 || day2 == 9) { day3 = "0" + day2; } if (month == 10 || month == 11 || month == 12) { date = "" + year + month + day3; } else { date = "" + year + "0" + month + day3; } date = "date(" + date + ":integer)."; System.out.println(date); String url2 = rdfAddress; HttpClient client2 = new HttpClient(); GetMethod method2 = new GetMethod(url2); method2.setFollowRedirects(true); String typestr = ""; // Execute the GET method int statusCode2 = client2.executeMethod(method2); if (statusCode2 != -1) { typestr = method2.getResponseBodyAsString(); } System.out.println("Types: " + typestr); Types.reset(); RDFSParser.parseRDFSString(typestr); try { HttpClient client = new HttpClient(); GetMethod method = new GetMethod(url); method.setFollowRedirects(true); // Execute the GET method int statusCode = client.executeMethod(method); if (statusCode != -1) { contents = method.getResponseBodyAsString(); } } catch (Exception e) { e.printStackTrace(); } contents = contents + "\n" + time; contents = contents + "\n" + dayOfWeek; contents = contents + "\n" + date; BackwardReasoner br = new BackwardReasoner(); Iterator solit = null; DefiniteClause dc = null; SymbolTable.reset(); pp.parseDefiniteClauses(contents); br.loadClauses(pp.iterator()); Iterator it = pp.iterator(); while (it.hasNext()) { DefiniteClause d = (DefiniteClause) it.next(); System.out.println("Loaded clause: " + d.toPOSLString()); } br = new BackwardReasoner(br.clauses, br.oids); MessageParser m = new MessageParser(message); Element atom = null; try { atom = m.parseForContent(); } catch (Exception e) { System.out.println("Invalid Message"); //out.flush(); } QueryBuilder q = new QueryBuilder(atom); String query = q.generateDoc(); System.out.println("ABOUT TO INPUT THIS QUERY:" + query); RuleMLParser qp = new RuleMLParser(); try { dc = qp.parseRuleMLQuery(query); } catch (Exception e) { System.out.println("Invalid Query"); //out.flush(); } //solit = br.iterativeDepthFirstSolutionIterator(dc); solit = br.iterativeDepthFirstSolutionIterator(dc); int varSize = 0; while (solit.hasNext()) { Vector data = new Vector(); BackwardReasoner.GoalList gl = (BackwardReasoner.GoalList) solit.next(); Hashtable varbind = gl.varBindings; javax.swing.tree.DefaultMutableTreeNode root = br.toTree(); root.setAllowsChildren(true); javax.swing.tree.DefaultTreeModel dtm = new DefaultTreeModel(root); int i = 0; Object[][] rowdata = new Object[varbind.size()][2]; varSize = varbind.size(); Enumeration e = varbind.keys(); while (e.hasMoreElements()) { Object k = e.nextElement(); Object val = varbind.get(k); String ks = (String) k; rowdata[i][0] = ks; rowdata[i][1] = val; i++; } data.addElement(rowdata); String[] messages = new String[data.size()]; MessageGenerator g = new MessageGenerator(data, varSize, messageEndpoint, m.getId(), m.getProtocol(), m.getRel(), varOrder); messages = g.Messages2(); String appender = ""; URL sender = new URL(address + ":" + port); HttpMessage msg = new HttpMessage(sender); Properties props = new Properties(); for (int i1 = 0; i1 < data.size(); i1++) { System.out.println(i1 + ")" + messages[i1].toString()); props.put("text", messages[i1].toString()); InputStream in = msg.sendGetMessage(props); } System.out.println("NEXT MESSAGE"); } MessageGenerator g = new MessageGenerator(null, varSize, messageEndpoint, m.getId(), m.getProtocol(), m.getRel()); URL sender = new URL(address + ":" + port); HttpMessage msg = new HttpMessage(sender); Properties props = new Properties(); String finalMessage = g.finalMessage(query); System.out.println(finalMessage); props.put("text", finalMessage); InputStream in = msg.sendGetMessage(props); System.out.println("Stop_Communication"); } catch (Exception e) { System.out.println("ERROR has occured : " + e.toString()); } out.close(); } // Get parameters from the request URL. String getRequestParam(HttpServletRequest request, String param) { if (request != null) { String paramVal = request.getParameter(param); return paramVal; } return null; } /** * Is used to remember the order of variables so that the message returned * to the OA does not contain randomly ordered data. * * @param message The RuleML message * * @return An array containing the order of the variables. */ public static String[] getVariableOrder(String message) { Vector<String> variables = new Vector<String>(); String[] variableList; //Break string up StringTokenizer st = new StringTokenizer(message, "<"); String temp = ""; //Temporary storage String tempVar = ""; //Temporary variable storage //While information remains while (st.hasMoreTokens()) { temp = st.nextToken(); //If it is a variable if (temp.startsWith("Var>")) { tempVar = ""; //Get the name of the variable for (int i = 4; i < temp.length(); i++) { if (temp.charAt(i) == '<') { break; } else { tempVar = tempVar + temp.charAt(i); } } variables.addElement(tempVar); //Store the variable name } } //Convert the vector to an array variableList = new String[variables.size()]; for (int i = 0; i < variables.size(); i++) { variableList[i] = variables.elementAt(i); } return variableList; } //End getVariableOrder() method }