1 |
torben |
1042 |
package dk.thoerup.traininfoservice.banedk; |
2 |
|
|
|
3 |
|
|
|
4 |
|
|
import java.net.URL; |
5 |
|
|
|
6 |
|
|
import java.util.ArrayList; |
7 |
|
|
import java.util.List; |
8 |
|
|
import java.util.Map; |
9 |
|
|
import java.util.logging.Logger; |
10 |
|
|
|
11 |
|
|
|
12 |
|
|
import org.jsoup.nodes.Document; |
13 |
|
|
import org.jsoup.nodes.Element; |
14 |
|
|
import org.jsoup.select.Elements; |
15 |
|
|
|
16 |
|
|
import dk.thoerup.circuitbreaker.CircuitBreaker; |
17 |
|
|
import dk.thoerup.circuitbreaker.CircuitBreakerManager; |
18 |
|
|
import dk.thoerup.traininfoservice.StationBean; |
19 |
|
|
import dk.thoerup.traininfoservice.StationDAO; |
20 |
|
|
import dk.thoerup.traininfoservice.Statistics; |
21 |
|
|
|
22 |
|
|
|
23 |
|
|
|
24 |
|
|
public class MetroFetcher { |
25 |
|
|
public static class MetroEntry { |
26 |
|
|
String metro; |
27 |
|
|
String destination; |
28 |
|
|
String minutes; |
29 |
|
|
} |
30 |
|
|
|
31 |
|
|
public static class MetroBean { |
32 |
|
|
String head; |
33 |
|
|
String operationInfo; //driftsinfo |
34 |
|
|
String plan; // koereplan |
35 |
|
|
|
36 |
|
|
List<MetroEntry> entries = new ArrayList<MetroEntry>(); |
37 |
|
|
} |
38 |
|
|
|
39 |
|
|
Logger logger = Logger.getLogger(MetroFetcher.class.getName()); |
40 |
|
|
StationDAO stationDAO = new StationDAO(); |
41 |
|
|
|
42 |
torben |
1043 |
Map<String, MetroBean> cache = new TimeoutMap<String,MetroBean>(60000); //TODO: make metro cache timeout configurable |
43 |
torben |
1042 |
|
44 |
|
|
public MetroBean cachedLookupMetroDepartures(int stationID) throws Exception { |
45 |
|
|
final String key = "metro:" + stationID; |
46 |
|
|
|
47 |
|
|
MetroBean metroBean = cache.get(key); |
48 |
|
|
|
49 |
|
|
if (metroBean == null) { |
50 |
|
|
metroBean = lookupMetroDepartures(stationID); |
51 |
|
|
cache.put(key, metroBean); |
52 |
|
|
} else { |
53 |
|
|
Statistics.getInstance().incrementDepartureCacheHits(); |
54 |
|
|
logger.info("Metro: Cache hit " + key); //remove before production |
55 |
|
|
} |
56 |
|
|
return metroBean; |
57 |
|
|
} |
58 |
|
|
|
59 |
|
|
public MetroBean lookupMetroDepartures(int stationID) throws Exception { |
60 |
|
|
|
61 |
|
|
StationBean station = stationDAO.getById(stationID) ; |
62 |
|
|
|
63 |
|
|
|
64 |
|
|
URL url = new URL("http://www.m.dk/layouts/Metro/Widgets/MetroWidget.ashx?StationId=" + station.getMetro() + "&Congestion=true&Application=MyMetro&Expiration=true"); |
65 |
torben |
1048 |
logger.fine("URL:" + url); |
66 |
torben |
1042 |
|
67 |
|
|
JsoupInvocation wrapper = new JsoupInvocation( url, 3000); |
68 |
|
|
CircuitBreaker breaker = CircuitBreakerManager.getManager().getCircuitBreaker("metro"); |
69 |
|
|
|
70 |
|
|
Document doc = (Document) breaker.invoke(wrapper); |
71 |
|
|
|
72 |
|
|
MetroBean bean = new MetroBean(); |
73 |
|
|
|
74 |
|
|
bean.head = doc.getElementsByClass("metro-widget-headline").get(0).text(); |
75 |
|
|
|
76 |
|
|
Element content = doc.getElementsByClass("metro-widget-content").get(0); |
77 |
|
|
Elements contentElems = content.children(); |
78 |
|
|
|
79 |
|
|
Element departureTable = content.getElementsByTag("table").get(0); |
80 |
|
|
|
81 |
|
|
Elements rows = departureTable.getElementsByTag("tr"); |
82 |
|
|
|
83 |
|
|
for (int i=1; i<rows.size(); i++) { |
84 |
|
|
Element row = rows.get(i); |
85 |
|
|
Elements fields = row.children(); |
86 |
|
|
|
87 |
|
|
String metro = fields.get(0).text(); |
88 |
|
|
String destination = fields.get(1).text(); |
89 |
|
|
Elements minuteFields = fields.get(2).children(); |
90 |
|
|
String minutes =""; |
91 |
|
|
|
92 |
|
|
for (Element elm : minuteFields) { |
93 |
|
|
minutes = minutes + elm.text() + " "; |
94 |
|
|
} |
95 |
|
|
|
96 |
|
|
MetroEntry entry = new MetroEntry(); |
97 |
|
|
entry.metro = metro; |
98 |
|
|
entry.destination = destination; |
99 |
|
|
entry.minutes = minutes; |
100 |
|
|
|
101 |
|
|
bean.entries.add(entry); |
102 |
|
|
} |
103 |
|
|
|
104 |
torben |
1043 |
bean.operationInfo = contentElems.get(3).text(); |
105 |
torben |
1042 |
|
106 |
torben |
1043 |
int planIndex; |
107 |
|
|
if (contentElems.get(4).text().trim().equalsIgnoreCase("stationsinformation")) { |
108 |
|
|
planIndex = 7; |
109 |
|
|
} else { |
110 |
|
|
planIndex = 5; |
111 |
|
|
} |
112 |
|
|
|
113 |
|
|
bean.plan = contentElems.get(planIndex).text(); |
114 |
|
|
|
115 |
torben |
1042 |
return bean; |
116 |
|
|
} |
117 |
|
|
|
118 |
|
|
} |