1 |
torben |
350 |
package dk.thoerup.traininfoservice.banedk; |
2 |
|
|
|
3 |
torben |
1060 |
import java.io.ByteArrayOutputStream; |
4 |
torben |
350 |
import java.io.IOException; |
5 |
torben |
1060 |
|
6 |
torben |
378 |
import java.util.logging.Level; |
7 |
torben |
350 |
import java.util.logging.Logger; |
8 |
|
|
|
9 |
|
|
import javax.servlet.ServletException; |
10 |
torben |
958 |
import javax.servlet.annotation.WebServlet; |
11 |
torben |
350 |
import javax.servlet.http.HttpServlet; |
12 |
|
|
import javax.servlet.http.HttpServletRequest; |
13 |
|
|
import javax.servlet.http.HttpServletResponse; |
14 |
|
|
|
15 |
torben |
1060 |
import org.simpleframework.xml.Serializer; |
16 |
|
|
import org.simpleframework.xml.core.Persister; |
17 |
|
|
|
18 |
torben |
1061 |
import dk.thoerup.android.traininfo.common.TimetableBean; |
19 |
torben |
468 |
import dk.thoerup.circuitbreaker.CircuitBreakerException; |
20 |
torben |
711 |
import dk.thoerup.traininfoservice.Statistics; |
21 |
torben |
421 |
|
22 |
torben |
350 |
/** |
23 |
|
|
* Servlet implementation class TimetableServlet |
24 |
|
|
*/ |
25 |
torben |
958 |
@WebServlet(urlPatterns={"/TimetableServlet"}) |
26 |
torben |
350 |
public class TimetableServlet extends HttpServlet { |
27 |
|
|
private static final long serialVersionUID = 1L; |
28 |
|
|
|
29 |
|
|
|
30 |
|
|
Logger logger = Logger.getLogger( TimetableServlet.class.getName() ); |
31 |
|
|
|
32 |
torben |
581 |
TimetableFetcher fetcher; |
33 |
torben |
350 |
|
34 |
torben |
1026 |
|
35 |
torben |
425 |
@Override |
36 |
torben |
581 |
public void init() throws ServletException { |
37 |
|
|
super.init(); |
38 |
|
|
|
39 |
torben |
1036 |
boolean useAzureSite = Boolean.parseBoolean( getServletContext().getInitParameter("useazuresite") ); |
40 |
torben |
584 |
int cacheTimeout = Integer.parseInt( getServletContext().getInitParameter("cache_timeout") ); |
41 |
torben |
1026 |
int replyTimeout = Integer.parseInt( getServletContext().getInitParameter("reply_timeout") ); |
42 |
torben |
1036 |
logger.info( "TimetableServlet, use azure site=" + useAzureSite + ", cache=" + cacheTimeout); |
43 |
|
|
fetcher = new TimetableFetcher(useAzureSite,cacheTimeout,replyTimeout); |
44 |
torben |
581 |
} |
45 |
|
|
|
46 |
|
|
@Override |
47 |
torben |
350 |
protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { |
48 |
torben |
458 |
if (request.getParameter("train") == null) { |
49 |
torben |
717 |
response.sendError(400, "not enough parameters (train)"); |
50 |
torben |
458 |
return; |
51 |
|
|
} |
52 |
torben |
717 |
if (request.getParameter("type") == null) { |
53 |
|
|
response.sendError(400, "not enough parameters (type)"); |
54 |
|
|
return; |
55 |
|
|
} |
56 |
torben |
711 |
Statistics.getInstance().incrementTimetableLookups(); |
57 |
torben |
458 |
|
58 |
torben |
350 |
String train = request.getParameter("train").trim(); |
59 |
torben |
717 |
String type = request.getParameter("type").trim(); |
60 |
torben |
697 |
|
61 |
torben |
350 |
try |
62 |
|
|
{ |
63 |
torben |
1060 |
TimetableBean timetable = fetcher.cachedLookupTimetable(train, type); |
64 |
torben |
350 |
|
65 |
|
|
String responseXML = formatTimetable(timetable); |
66 |
|
|
|
67 |
|
|
response.setContentType("text/xml"); |
68 |
|
|
response.getWriter().print(responseXML); |
69 |
torben |
462 |
} catch (java.io.IOException ioe) { |
70 |
torben |
717 |
logger.warning("(timetable) Read failed, type=" + type + ", train="+train + ". " + ioe.getMessage()); |
71 |
torben |
716 |
Statistics.getInstance().incrementTimetableErrors(); |
72 |
torben |
378 |
response.sendError(500, "Backend timed out"); |
73 |
torben |
421 |
} catch (CircuitBreakerException cbe) { |
74 |
|
|
logger.warning("Circuitbreaker - failing fast"); |
75 |
torben |
716 |
Statistics.getInstance().incrementTimetableErrors(); |
76 |
torben |
421 |
response.sendError(500); |
77 |
torben |
451 |
}catch (Exception e) { |
78 |
torben |
717 |
logger.log(Level.WARNING, "failure looking up timetable: type=" + type + ",train=" +train, e); |
79 |
torben |
716 |
Statistics.getInstance().incrementTimetableErrors(); |
80 |
torben |
378 |
response.sendError(500); |
81 |
torben |
350 |
} |
82 |
|
|
|
83 |
|
|
} |
84 |
|
|
|
85 |
torben |
1060 |
String formatTimetable(TimetableBean timetable) throws ServletException { |
86 |
|
|
Serializer serializer = new Persister(); |
87 |
|
|
|
88 |
|
|
ByteArrayOutputStream out = new ByteArrayOutputStream(); |
89 |
|
|
|
90 |
|
|
try { |
91 |
|
|
serializer.write(timetable, out); |
92 |
|
|
} catch (Exception e) { |
93 |
|
|
throw new ServletException(e); |
94 |
torben |
350 |
} |
95 |
|
|
|
96 |
torben |
1060 |
return out.toString(); |
97 |
torben |
350 |
} |
98 |
|
|
|
99 |
|
|
} |