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.genericjavautils.TimeoutMap;
import dk.thoerup.traininfoservice.db.StationDAO;


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();
                                                        
                Elements contentTables = content.getElementsByTag("table");
                if ( contentTables.size() > 0 ) {
                        
                        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);                        
                        }
                }
                                

                for (int i=0; i<contentElems.size(); i++) {
                        String currentText = contentElems.get(i).text().trim();
                        if (currentText.equalsIgnoreCase("driftsinformation")) {                                
                                bean.operationInfo = contentElems.get(i+1).text();
                        }
                        
                        if (currentText.equalsIgnoreCase("køreplan")) {                                
                                bean.plan = contentElems.get(i+1).text();
                        }
                }
                

                return bean;
        }
        
}
1	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	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	import dk.thoerup.circuitbreaker.CircuitBreaker;
16	import dk.thoerup.circuitbreaker.CircuitBreakerManager;
17	import dk.thoerup.genericjavautils.TimeoutMap;
18	import dk.thoerup.traininfoservice.db.StationDAO;
19
20
21
22	public class MetroFetcher {
23
24	Logger logger = Logger.getLogger(MetroFetcher.class.getName());
25	StationDAO stationDAO = new StationDAO();
26
27	Map<String, MetroBean> cache = new TimeoutMap<String,MetroBean>(60000); //TODO: make metro cache timeout configurable
28
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	StationEntry station = stationDAO.getById(stationID) ;
47
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	logger.fine("URL:" + url);
51
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	Elements contentTables = content.getElementsByTag("table");
65	if ( contentTables.size() > 0 ) {
66
67	Element departureTable = content.getElementsByTag("table").get(0);
68
69	Elements rows = departureTable.getElementsByTag("tr");
70
71	for (int i=1; i<rows.size(); i++) {
72	Element row = rows.get(i);
73	Elements fields = row.children();
74
75
76
77	Elements metroFields = fields.get(0).children();
78	String metro ="";
79	for (Element elm : metroFields) {
80	metro = metro + elm.text() + " ";
81	}
82
83
84
85	String destination = fields.get(1).text();
86
87	Elements minuteFields = fields.get(2).children();
88	String minutes ="";
89	for (Element elm : minuteFields) {
90	minutes = minutes + elm.text() + " ";
91	}
92
93	MetroEntry entry = new MetroEntry();
94	entry.metro = metro.trim();
95	entry.destination = destination.trim();
96	entry.minutes = minutes.trim();
97
98	bean.entries.add(entry);
99	}
100	}
101
102
103	for (int i=0; i<contentElems.size(); i++) {
104	String currentText = contentElems.get(i).text().trim();
105	if (currentText.equalsIgnoreCase("driftsinformation")) {
106	bean.operationInfo = contentElems.get(i+1).text();
107	}
108
109	if (currentText.equalsIgnoreCase("køreplan")) {
110	bean.plan = contentElems.get(i+1).text();
111	}
112	}
113
114
115
116	return bean;
117	}
118
119	}