10 |
import javax.servlet.http.HttpServletRequest; |
import javax.servlet.http.HttpServletRequest; |
11 |
import javax.servlet.http.HttpServletResponse; |
import javax.servlet.http.HttpServletResponse; |
12 |
|
|
13 |
import dk.thoerup.curcuitbreaker.CircuitBreakerException; |
import dk.thoerup.circuitbreaker.CircuitBreakerException; |
14 |
|
import dk.thoerup.traininfoservice.Statistics; |
15 |
|
|
16 |
/** |
/** |
17 |
* Servlet implementation class TimetableServlet |
* Servlet implementation class TimetableServlet |
22 |
|
|
23 |
Logger logger = Logger.getLogger( TimetableServlet.class.getName() ); |
Logger logger = Logger.getLogger( TimetableServlet.class.getName() ); |
24 |
|
|
25 |
TimetableFetcher fetcher = new TimetableFetcher(); |
TimetableFetcher fetcher; |
26 |
|
|
27 |
|
@Override |
28 |
|
public void init() throws ServletException { |
29 |
|
super.init(); |
30 |
|
|
31 |
|
boolean useTempSite = Boolean.parseBoolean( getServletContext().getInitParameter("usetempsite") ); |
32 |
|
int cacheTimeout = Integer.parseInt( getServletContext().getInitParameter("cache_timeout") ); |
33 |
|
logger.info( "TimetableServlet, use temp site=" + useTempSite + ", cache=" + cacheTimeout); |
34 |
|
fetcher = new TimetableFetcher(useTempSite,cacheTimeout); |
35 |
|
} |
36 |
|
|
37 |
@Override |
@Override |
38 |
protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { |
protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { |
39 |
if (request.getParameter("train") == null) { |
if (request.getParameter("train") == null) { |
40 |
response.sendError(400, "not enough parameters"); |
response.sendError(400, "not enough parameters (train)"); |
41 |
return; |
return; |
42 |
} |
} |
43 |
|
if (request.getParameter("type") == null) { |
44 |
String train = request.getParameter("train").trim(); |
response.sendError(400, "not enough parameters (type)"); |
|
|
|
|
String sections[] = train.split(" "); |
|
|
if (sections.length != 2) { |
|
|
response.sendError(400, "Invalid parameter"); |
|
45 |
return; |
return; |
46 |
} |
} |
47 |
|
Statistics.getInstance().incrementTimetableLookups(); |
48 |
|
|
49 |
String type = lookupType(sections[0]); |
String train = request.getParameter("train").trim(); |
50 |
String trainID = sections[1]; |
String type = request.getParameter("type").trim(); |
51 |
|
|
52 |
try |
try |
53 |
{ |
{ |
54 |
List<TimetableBean> timetable = fetcher.cachedLookupTimetable(trainID, type); |
List<TimetableBean> timetable = fetcher.cachedLookupTimetable(train, type); |
55 |
|
|
56 |
String responseXML = formatTimetable(timetable); |
String responseXML = formatTimetable(timetable); |
57 |
|
|
58 |
response.setContentType("text/xml"); |
response.setContentType("text/xml"); |
59 |
response.getWriter().print(responseXML); |
response.getWriter().print(responseXML); |
60 |
} catch (java.io.IOException ioe) { |
} catch (java.io.IOException ioe) { |
61 |
logger.warning("(timetable) Read failed, train="+train + ". " + ioe.getMessage()); |
logger.warning("(timetable) Read failed, type=" + type + ", train="+train + ". " + ioe.getMessage()); |
62 |
|
Statistics.getInstance().incrementTimetableErrors(); |
63 |
response.sendError(500, "Backend timed out"); |
response.sendError(500, "Backend timed out"); |
64 |
} catch (CircuitBreakerException cbe) { |
} catch (CircuitBreakerException cbe) { |
65 |
logger.warning("Circuitbreaker - failing fast"); |
logger.warning("Circuitbreaker - failing fast"); |
66 |
|
Statistics.getInstance().incrementTimetableErrors(); |
67 |
response.sendError(500); |
response.sendError(500); |
68 |
}catch (Exception e) { |
}catch (Exception e) { |
69 |
logger.log(Level.WARNING, "failure looking up timetable: train=" +train, e); |
logger.log(Level.WARNING, "failure looking up timetable: type=" + type + ",train=" +train, e); |
70 |
|
Statistics.getInstance().incrementTimetableErrors(); |
71 |
response.sendError(500); |
response.sendError(500); |
72 |
} |
} |
73 |
|
|
74 |
} |
} |
75 |
|
|
|
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"; |
|
|
} |
|
|
} |
|
|
|
|
76 |
String formatTimetable(List<TimetableBean> timetable) { |
String formatTimetable(List<TimetableBean> timetable) { |
77 |
StringBuffer sb = new StringBuffer(); |
StringBuffer sb = new StringBuffer(); |
78 |
|
//sb.append("<?xml version=\"1.0\" encoding=\"ISO-8859-1\"?>\n"); |
79 |
|
|
80 |
sb.append("<timetable>"); |
sb.append("<timetable>"); |
81 |
|
|
88 |
sb.append("<station>").append( bean.getStation() ).append("</station>"); |
sb.append("<station>").append( bean.getStation() ).append("</station>"); |
89 |
sb.append("<arrival>").append( bean.getArrival() ).append("</arrival>"); |
sb.append("<arrival>").append( bean.getArrival() ).append("</arrival>"); |
90 |
sb.append("<departure>").append( bean.getDeparture() ).append("</departure>"); |
sb.append("<departure>").append( bean.getDeparture() ).append("</departure>"); |
91 |
|
sb.append("<stationid>").append( bean.getStationId() ).append("</stationid>"); |
92 |
|
|
93 |
sb.append("</entry>"); |
sb.append("</entry>"); |
94 |
} |
} |