1 |
package dk.thoerup.traininfoservice.banedk; |
package dk.thoerup.traininfoservice.banedk; |
2 |
|
|
3 |
import java.io.IOException; |
import java.io.IOException; |
4 |
import java.util.List; |
import java.io.StringWriter; |
5 |
|
|
6 |
import java.util.logging.Level; |
import java.util.logging.Level; |
7 |
import java.util.logging.Logger; |
import java.util.logging.Logger; |
8 |
|
|
9 |
import javax.servlet.ServletException; |
import javax.servlet.ServletException; |
10 |
|
import javax.servlet.annotation.WebServlet; |
11 |
import javax.servlet.http.HttpServlet; |
import javax.servlet.http.HttpServlet; |
12 |
import javax.servlet.http.HttpServletRequest; |
import javax.servlet.http.HttpServletRequest; |
13 |
import javax.servlet.http.HttpServletResponse; |
import javax.servlet.http.HttpServletResponse; |
14 |
|
|
15 |
|
import org.simpleframework.xml.Serializer; |
16 |
|
import org.simpleframework.xml.core.Persister; |
17 |
|
|
18 |
|
import dk.thoerup.android.traininfo.common.TimetableBean; |
19 |
import dk.thoerup.circuitbreaker.CircuitBreakerException; |
import dk.thoerup.circuitbreaker.CircuitBreakerException; |
20 |
import dk.thoerup.traininfoservice.Statistics; |
import dk.thoerup.traininfoservice.Statistics; |
21 |
|
import dk.thoerup.traininfoservice.TraininfoSettings;; |
22 |
|
|
23 |
/** |
/** |
24 |
* Servlet implementation class TimetableServlet |
* Servlet implementation class TimetableServlet |
25 |
*/ |
*/ |
26 |
|
@WebServlet(urlPatterns={"/TimetableServlet"}) |
27 |
public class TimetableServlet extends HttpServlet { |
public class TimetableServlet extends HttpServlet { |
28 |
private static final long serialVersionUID = 1L; |
private static final long serialVersionUID = 1L; |
29 |
|
|
32 |
|
|
33 |
TimetableFetcher fetcher; |
TimetableFetcher fetcher; |
34 |
|
|
35 |
|
|
36 |
@Override |
@Override |
37 |
public void init() throws ServletException { |
public void init() throws ServletException { |
38 |
super.init(); |
super.init(); |
39 |
|
|
40 |
boolean useTempSite = Boolean.parseBoolean( getServletContext().getInitParameter("usetempsite") ); |
|
41 |
int cacheTimeout = Integer.parseInt( getServletContext().getInitParameter("cache_timeout") ); |
TraininfoSettings settings = (TraininfoSettings) getServletContext().getAttribute("settings"); |
42 |
logger.info( "TimetableServlet, use temp site=" + useTempSite + ", cache=" + cacheTimeout); |
fetcher = new TimetableFetcher(settings); |
|
fetcher = new TimetableFetcher(useTempSite,cacheTimeout); |
|
43 |
} |
} |
44 |
|
|
45 |
@Override |
@Override |
59 |
|
|
60 |
try |
try |
61 |
{ |
{ |
62 |
List<TimetableBean> timetable = fetcher.cachedLookupTimetable(train, type); |
TimetableBean timetable = fetcher.cachedLookupTimetable(train, type); |
63 |
|
|
64 |
String responseXML = formatTimetable(timetable); |
String responseXML = formatTimetable(timetable); |
65 |
|
|
70 |
Statistics.getInstance().incrementTimetableErrors(); |
Statistics.getInstance().incrementTimetableErrors(); |
71 |
response.sendError(500, "Backend timed out"); |
response.sendError(500, "Backend timed out"); |
72 |
} catch (CircuitBreakerException cbe) { |
} catch (CircuitBreakerException cbe) { |
73 |
logger.warning("Circuitbreaker - failing fast"); |
logger.warning("Circuitbreaker - failing fast, type=" + type + ", train="+train); |
74 |
Statistics.getInstance().incrementTimetableErrors(); |
Statistics.getInstance().incrementTimetableErrors(); |
75 |
response.sendError(500); |
response.sendError(500); |
76 |
}catch (Exception e) { |
}catch (Exception e) { |
81 |
|
|
82 |
} |
} |
83 |
|
|
84 |
String formatTimetable(List<TimetableBean> timetable) { |
String formatTimetable(TimetableBean timetable) throws ServletException { |
85 |
StringBuffer sb = new StringBuffer(); |
Serializer serializer = new Persister(); |
86 |
//sb.append("<?xml version=\"1.0\" encoding=\"ISO-8859-1\"?>\n"); |
|
87 |
|
StringWriter out = new StringWriter(); |
88 |
sb.append("<timetable>"); |
|
89 |
|
try { |
90 |
for (TimetableBean bean : timetable) { |
serializer.write(timetable, out); |
91 |
sb.append("<entry"); |
} catch (Exception e) { |
92 |
if (bean.isCurrent()) |
throw new ServletException(e); |
|
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("<stationid>").append( bean.getStationId() ).append("</stationid>"); |
|
|
|
|
|
sb.append("</entry>"); |
|
93 |
} |
} |
94 |
|
|
95 |
sb.append("</timetable>"); |
return out.toString(); |
|
|
|
|
return sb.toString(); |
|
96 |
} |
} |
97 |
|
|
98 |
} |
} |