traininfoservice/banedk/TimetableServlet.java

package dk.thoerup.traininfoservice.banedk;

import java.io.IOException;
import java.util.List;
import java.util.logging.Level;
import java.util.logging.Logger;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

/**
 * Servlet implementation class TimetableServlet
 */
public class TimetableServlet extends HttpServlet {
        private static final long serialVersionUID = 1L;
       
        
        Logger logger = Logger.getLogger( TimetableServlet.class.getName() );
        
        TimetableFetcher fetcher = new TimetableFetcher();
        
        protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
                String train = request.getParameter("train").trim();
                
                String sections[] = train.split(" ");
                if (sections.length != 2) {
                        response.sendError(400, "Invalid parameter");
                        return;
                }
                
                String type = lookupType(sections[0]);
                String trainID = sections[1];
                try
                {
                        List<TimetableBean> timetable = fetcher.lookupTimetable(trainID, type);
                
                        String responseXML = formatTimetable(timetable);
                
                        response.setContentType("text/xml");
                        response.getWriter().print(responseXML);
                } catch (java.net.SocketTimeoutException ste) {
                        logger.warning("(timetable) Read timed out, train="+train);
                        response.sendError(500, "Backend timed out");
                } catch (Exception e) {
                        logger.log(Level.WARNING, "failure looking up timetable: train=" +train, e);
                        response.sendError(500);
                }
                
        }
        
        String lookupType(String trainCode) {
                trainCode = trainCode.toLowerCase();
                
                if (trainCode.equals("a") || trainCode.equals("b") || trainCode.equals("bx") || trainCode.equals("c") || 
                                trainCode.equals("e") || trainCode.equals("f") || trainCode.equals("h")) {
                        return "S2";
                } else {
                        return "FJRN";
                }
        }
        
        String formatTimetable(List<TimetableBean> timetable) {
                StringBuffer sb = new StringBuffer();
                
                sb.append("<timetable>");
                
                for (TimetableBean bean : timetable) {
                        sb.append("<entry");
                        if (bean.isCurrent())
                                sb.append(" current=\"true\"");
                        sb.append(">");
                        
                        sb.append("<station>").append( bean.getStation() ).append("</station>");
                        sb.append("<arrival>").append( bean.getArrival() ).append("</arrival>");
                        sb.append("<departure>").append( bean.getDeparture() ).append("</departure>");
                        
                        sb.append("</entry>");
                }
                
                sb.append("</timetable>");
                
                return sb.toString();
        }

}
1	package dk.thoerup.traininfoservice.banedk;
2
3	import java.io.IOException;
4	import java.util.List;
5	import java.util.logging.Level;
6	import java.util.logging.Logger;
7
8	import javax.servlet.ServletException;
9	import javax.servlet.http.HttpServlet;
10	import javax.servlet.http.HttpServletRequest;
11	import javax.servlet.http.HttpServletResponse;
12
13	/**
14	* Servlet implementation class TimetableServlet
15	*/
16	public class TimetableServlet extends HttpServlet {
17	private static final long serialVersionUID = 1L;
18
19
20	Logger logger = Logger.getLogger( TimetableServlet.class.getName() );
21
22	TimetableFetcher fetcher = new TimetableFetcher();
23
24	protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
25	String train = request.getParameter("train").trim();
26
27	String sections[] = train.split(" ");
28	if (sections.length != 2) {
29	response.sendError(400, "Invalid parameter");
30	return;
31	}
32
33	String type = lookupType(sections[0]);
34	String trainID = sections[1];
35	try
36	{
37	List<TimetableBean> timetable = fetcher.lookupTimetable(trainID, type);
38
39	String responseXML = formatTimetable(timetable);
40
41	response.setContentType("text/xml");
42	response.getWriter().print(responseXML);
43	} catch (java.net.SocketTimeoutException ste) {
44	logger.warning("(timetable) Read timed out, train="+train);
45	response.sendError(500, "Backend timed out");
46	} catch (Exception e) {
47	logger.log(Level.WARNING, "failure looking up timetable: train=" +train, e);
48	response.sendError(500);
49	}
50
51	}
52
53	String lookupType(String trainCode) {
54	trainCode = trainCode.toLowerCase();
55
56	if (trainCode.equals("a") \|\| trainCode.equals("b") \|\| trainCode.equals("bx") \|\| trainCode.equals("c") \|\|
57	trainCode.equals("e") \|\| trainCode.equals("f") \|\| trainCode.equals("h")) {
58	return "S2";
59	} else {
60	return "FJRN";
61	}
62	}
63
64	String formatTimetable(List<TimetableBean> timetable) {
65	StringBuffer sb = new StringBuffer();
66
67	sb.append("<timetable>");
68
69	for (TimetableBean bean : timetable) {
70	sb.append("<entry");
71	if (bean.isCurrent())
72	sb.append(" current=\"true\"");
73	sb.append(">");
74
75	sb.append("<station>").append( bean.getStation() ).append("</station>");
76	sb.append("<arrival>").append( bean.getArrival() ).append("</arrival>");
77	sb.append("<departure>").append( bean.getDeparture() ).append("</departure>");
78
79	sb.append("</entry>");
80	}
81
82	sb.append("</timetable>");
83
84	return sb.toString();
85	}
86
87	}