traininfoservice/banedk/MetroFetcher.java

package dk.thoerup.traininfoservice.banedk;


import java.net.URL;
import java.util.Map;
import java.util.logging.Logger;

import org.jsoup.nodes.Document;
import org.jsoup.nodes.Element;
import org.jsoup.select.Elements;

import dk.thoerup.android.traininfo.common.MetroBean;
import dk.thoerup.android.traininfo.common.MetroBean.MetroEntry;
import dk.thoerup.android.traininfo.common.StationBean.StationEntry;
import dk.thoerup.circuitbreaker.CircuitBreaker;
import dk.thoerup.circuitbreaker.CircuitBreakerManager;
import dk.thoerup.traininfoservice.StationDAO;
import dk.thoerup.traininfoservice.Statistics;


public class MetroFetcher {
        
        Logger logger = Logger.getLogger(MetroFetcher.class.getName());
        StationDAO stationDAO = new StationDAO();
        
        Map<String, MetroBean> cache = new TimeoutMap<String,MetroBean>(60000); //TODO: make metro cache timeout configurable
        
        public MetroBean cachedLookupMetroDepartures(int stationID) throws Exception {
                final String key = "metro:" + stationID;
                
                MetroBean metroBean = cache.get(key);
                
                if (metroBean == null) {
                        metroBean = lookupMetroDepartures(stationID);
                        cache.put(key, metroBean);
                } else {
                        Statistics.getInstance().incrementDepartureCacheHits();
                        logger.info("Metro: Cache hit " + key); //remove before production
                }
                return metroBean;
        }

        public MetroBean lookupMetroDepartures(int stationID) throws Exception {
                
                StationEntry station = stationDAO.getById(stationID) ;
                        
                
                URL url = new URL("http://www.m.dk/layouts/Metro/Widgets/MetroWidget.ashx?StationId=" + station.getMetro() + "&Congestion=true&Application=MyMetro&Expiration=true");
                logger.fine("URL:" + url);
                
            JsoupInvocation wrapper = new JsoupInvocation( url, 3000);
            CircuitBreaker breaker = CircuitBreakerManager.getManager().getCircuitBreaker("metro");
                
                Document doc = (Document) breaker.invoke(wrapper);
                
                MetroBean bean = new MetroBean();
                
                bean.head = doc.getElementsByClass("metro-widget-headline").get(0).text();                      
                
                Element content = doc.getElementsByClass("metro-widget-content").get(0);
                Elements contentElems = content.children();
                                                        
                Element departureTable = content.getElementsByTag("table").get(0);

                Elements rows = departureTable.getElementsByTag("tr");

                for (int i=1; i<rows.size(); i++) {
                        Element row = rows.get(i);      
                        Elements fields = row.children();

                        
                        Elements metroFields = fields.get(0).children();                        
                        String metro ="";                       
                        for (Element elm : metroFields) {
                                metro = metro + elm.text() + " ";
                        }
                        
                        
                        String destination = fields.get(1).text();
                        
                        Elements minuteFields = fields.get(2).children();                       
                        String minutes ="";                     
                        for (Element elm : minuteFields) {
                                minutes = minutes + elm.text() + " ";
                        }
                        
                        MetroEntry entry = new MetroEntry();
                        entry.metro = metro.trim();
                        entry.destination = destination.trim();
                        entry.minutes = minutes.trim();
                        
                        bean.entries.add(entry);                        
                }
                                
                bean.operationInfo = contentElems.get(3).text();
                
                for (int i=4; i<contentElems.size(); i++) {
                        if (contentElems.get(i).text().trim().equalsIgnoreCase("køreplan")) {                          
                                bean.plan = contentElems.get(i+1).text();
                        }
                }

                return bean;
        }
        
}
1	torben	1042	package dk.thoerup.traininfoservice.banedk;
2
3
4			import java.net.URL;
5			import java.util.Map;
6			import java.util.logging.Logger;
7
8			import org.jsoup.nodes.Document;
9			import org.jsoup.nodes.Element;
10			import org.jsoup.select.Elements;
11
12	torben	1061	import dk.thoerup.android.traininfo.common.MetroBean;
13			import dk.thoerup.android.traininfo.common.MetroBean.MetroEntry;
14			import dk.thoerup.android.traininfo.common.StationBean.StationEntry;
15	torben	1042	import dk.thoerup.circuitbreaker.CircuitBreaker;
16			import dk.thoerup.circuitbreaker.CircuitBreakerManager;
17			import dk.thoerup.traininfoservice.StationDAO;
18			import dk.thoerup.traininfoservice.Statistics;
19
20
21
22			public class MetroFetcher {
23
24			Logger logger = Logger.getLogger(MetroFetcher.class.getName());
25			StationDAO stationDAO = new StationDAO();
26
27	torben	1043	Map<String, MetroBean> cache = new TimeoutMap<String,MetroBean>(60000); //TODO: make metro cache timeout configurable
28	torben	1042
29			public MetroBean cachedLookupMetroDepartures(int stationID) throws Exception {
30			final String key = "metro:" + stationID;
31
32			MetroBean metroBean = cache.get(key);
33
34			if (metroBean == null) {
35			metroBean = lookupMetroDepartures(stationID);
36			cache.put(key, metroBean);
37			} else {
38			Statistics.getInstance().incrementDepartureCacheHits();
39			logger.info("Metro: Cache hit " + key); //remove before production
40			}
41			return metroBean;
42			}
43
44			public MetroBean lookupMetroDepartures(int stationID) throws Exception {
45
46	torben	1060	StationEntry station = stationDAO.getById(stationID) ;
47	torben	1042
48
49			URL url = new URL("http://www.m.dk/layouts/Metro/Widgets/MetroWidget.ashx?StationId=" + station.getMetro() + "&Congestion=true&Application=MyMetro&Expiration=true");
50	torben	1048	logger.fine("URL:" + url);
51	torben	1042
52			JsoupInvocation wrapper = new JsoupInvocation( url, 3000);
53			CircuitBreaker breaker = CircuitBreakerManager.getManager().getCircuitBreaker("metro");
54
55			Document doc = (Document) breaker.invoke(wrapper);
56
57			MetroBean bean = new MetroBean();
58
59			bean.head = doc.getElementsByClass("metro-widget-headline").get(0).text();
60
61			Element content = doc.getElementsByClass("metro-widget-content").get(0);
62			Elements contentElems = content.children();
63
64			Element departureTable = content.getElementsByTag("table").get(0);
65
66			Elements rows = departureTable.getElementsByTag("tr");
67
68			for (int i=1; i<rows.size(); i++) {
69			Element row = rows.get(i);
70			Elements fields = row.children();
71	torben	1056
72	torben	1042
73	torben	1056
74			Elements metroFields = fields.get(0).children();
75			String metro ="";
76			for (Element elm : metroFields) {
77			metro = metro + elm.text() + " ";
78			}
79
80
81
82	torben	1042	String destination = fields.get(1).text();
83
84	torben	1056	Elements minuteFields = fields.get(2).children();
85			String minutes ="";
86	torben	1042	for (Element elm : minuteFields) {
87			minutes = minutes + elm.text() + " ";
88			}
89
90			MetroEntry entry = new MetroEntry();
91	torben	1056	entry.metro = metro.trim();
92			entry.destination = destination.trim();
93			entry.minutes = minutes.trim();
94	torben	1042
95			bean.entries.add(entry);
96			}
97
98	torben	1043	bean.operationInfo = contentElems.get(3).text();
99	torben	1042
100	torben	1051	for (int i=4; i<contentElems.size(); i++) {
101			if (contentElems.get(i).text().trim().equalsIgnoreCase("køreplan")) {
102	torben	1050	bean.plan = contentElems.get(i+1).text();
103			}
104	torben	1043	}
105	torben	1050
106	torben	1042	return bean;
107			}
108
109			}