traininfoservice/banedk/TimetableFetcher.java

package dk.thoerup.traininfoservice.banedk;


import java.net.URL;
import java.sql.SQLException;
import java.util.Map;
import java.util.logging.Level;
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.TimetableBean;
import dk.thoerup.android.traininfo.common.TimetableEntry;
import dk.thoerup.circuitbreaker.CircuitBreaker;
import dk.thoerup.circuitbreaker.CircuitBreakerManager;
import dk.thoerup.traininfoservice.Statistics;
import dk.thoerup.traininfoservice.TraininfoSettings;
import dk.thoerup.traininfoservice.db.StationDAO;

public class TimetableFetcher {

                
        Map<String, TimetableBean> cache; 
        Map<String, Integer> stationCache;

        StationDAO stationDao = new StationDAO();
        
        
        Logger logger = Logger.getLogger(TimetableFetcher.class.getName());

        TraininfoSettings settings;     
        
        public TimetableFetcher(TraininfoSettings settings) {
                this.settings = settings;
                
                cache = new TimeoutMap<String,TimetableBean>( settings.getCacheTimeout() );
                stationCache = new TimeoutMap<String,Integer>( 3*60*60*1000 );
        }
        
        
        TimetableBean cachedLookupTimetable(String trainID, String type) throws Exception {
                String key = trainID+type;
                TimetableBean list = cache.get(key);
                
                if (list == null) {
                        list = lookupTimetable(trainID,type);
                        cache.put(key, list);
                } else {
                        Statistics.getInstance().incrementTimetableCacheHits();
                        logger.info("Timetable: Cache hit " + trainID); 
                }
                return list;
        }
        
        TimetableBean lookupTimetable(String trainID, String type) throws Exception {
                if (settings.getUseAzureSite() == true ){
                        return lookupTimetableAzureSite(trainID, type);
                        
                } else {
                        return lookupTimetableWwwSite(trainID, type);
                }
        }
        
        int getStationId(String name) {
                Integer id = stationCache.get(name);
                
                if (id == null) {
                        try {
                                id = stationDao.getIdByName(name);
                                stationCache.put(name, id);
                        } catch (SQLException e) {
                                logger.log(Level.SEVERE, "getStationId failed", e);
                                id = -1;
                        }
                } 

                return id;
        }

        TimetableBean lookupTimetableAzureSite(String trainID, String type) throws Exception {          
                TimetableBean timetableBean = new TimetableBean();
                

                String url = "http://trafikinfo.bane.dk/TrafikInformation/Ruteplan/" + trainID;                 
                logger.fine("URL:" + url);
            
            JsoupInvocation wrapper = new JsoupInvocation( new URL(url) , settings.getReplyTimeout() );
            CircuitBreaker breaker = CircuitBreakerManager.getManager().getCircuitBreaker("banedk");
            
            Document doc = (Document) breaker.invoke(wrapper);
                    
            
            boolean currentStation = false;
            boolean currentStationSaved = false;
            
            Elements tables = doc.getElementsByClass("Rute");
            
            if (tables.size() == 1) {
                Element timetable = tables.get(0);
                Elements rows = timetable.getElementsByTag("tr");
                
                for (int i=0; i<rows.size(); i++) {
                        if (i==0) //First row is column headers
                                continue;
                        
                        
                        Element row = rows.get(i);
                        Elements fields = row.getElementsByTag("td");

                        
                        if (currentStationSaved == false && fields.get(0).attr("class").equalsIgnoreCase("Tidsstreg")) {
                                currentStation = true;
                                continue;
                        }
                        
                        TimetableEntry entry = new TimetableEntry();
                        
                        String station = fields.get(0).text() ;
                        if (station.equals("København"))
                                station = "København H"; //correct inconsistency in naming
                        
                        entry.setStation( station );
                        entry.setArrival( fields.get(1).text() );
                        entry.setDeparture( fields.get(2).text() );
                        
                        boolean cancelled = fields.get(3).text().equalsIgnoreCase("aflyst");
                        entry.setCancelled(cancelled);
                        
                        if (currentStation == true && currentStationSaved == false ) {
                                entry.setCurrent(currentStation);
                                currentStationSaved = true;
                        }
                        
                        entry.setStationId( getStationId( station ));
                        
                        timetableBean.entries.add(entry);
                }
                
                //TODO: There is an off-by-one error in this cancelled parser thingie
                final String cancelledString = "Aflyst";
                for (int i=0;i<timetableBean.entries.size(); i++) { //handle cancelled labels
                        final int lastIdx = (timetableBean.entries.size() - 1);
                        
                        TimetableEntry current = timetableBean.entries.get(i);
                        if (current.isCancelled()) {
                                if (i == 0) {
                                        current.setDeparture(cancelledString);
                                } else if (i == lastIdx) {
                                        current.setArrival(cancelledString);
                                } else if (i>0 && i<lastIdx) {
                                        TimetableEntry next = timetableBean.entries.get(i+1);
                                        TimetableEntry prev = timetableBean.entries.get(i-1);
                                        
                                        if (next.isCancelled())
                                                current.setDeparture(cancelledString);
                                        if (prev.isCancelled())
                                                current.setArrival(cancelledString);
                                }
                        }
                }
                
            } else {
                logger.warning("No time table found, trainID=" + trainID + " type=" + type);
            }
            
                
                return timetableBean;
        }

        TimetableBean lookupTimetableWwwSite(String trainID, String type) throws Exception {            
                TimetableBean timetableBean = new TimetableBean();
                
                String url = "http://www.bane.dk/visRute.asp?W=" + type + "&TogNr=" + trainID + "&artikelId=4276";
                logger.fine("URL:" + url);

            
            JsoupInvocation wrapper = new JsoupInvocation( new URL(url) , settings.getReplyTimeout() );
            CircuitBreaker breaker = CircuitBreakerManager.getManager().getCircuitBreaker("banedk");
            
            Document doc = (Document) breaker.invoke(wrapper);
                    
            
            boolean currentStation = false;
            boolean currentStationSaved = false;
            
            Elements tables = doc.getElementsByClass("Rute");
            
            if (tables.size() == 1) {
                Element timetable = tables.get(0);
                Elements rows = timetable.getElementsByTag("tr");
                
                for (int i=0; i<rows.size(); i++) {
                        if (i==0) //First row is column headers
                                continue;
                        
                        
                        Element row = rows.get(i);
                        Elements fields = row.getElementsByTag("td");

                        
                        if (currentStationSaved == false && fields.get(0).attr("class").equalsIgnoreCase("Tidsstreg")) {
                                currentStation = true;
                                continue;
                        }
                        
                        TimetableEntry entry = new TimetableEntry();
                        
                        String station = DepartureFetcher.cleanText( fields.get(0).text() ) ;
                        if (station.equals("København"))
                                station = "København H"; //correct inconsistency in naming
                        
                        String arrival = DepartureFetcher.cleanText( fields.get(1).text() );
                        String departure = DepartureFetcher.cleanText( fields.get(2).text() );
                        
                        entry.setStation( station );
                        entry.setArrival( arrival );
                        entry.setDeparture( departure );
                
                        
                        if (currentStation == true && currentStationSaved == false ) {
                                entry.setCurrent(currentStation);
                                currentStationSaved = true;
                        }
                        
                        entry.setStationId( getStationId( station ));
                        
                        timetableBean.entries.add(entry);
                }               
                
            } else {
                logger.warning("No time table found, trainID=" + trainID + " type=" + type);
            }
            
                
                return timetableBean;
        }       
        
}
1	package dk.thoerup.traininfoservice.banedk;
2
3
4
5	import java.net.URL;
6	import java.sql.SQLException;
7	import java.util.Map;
8	import java.util.logging.Level;
9	import java.util.logging.Logger;
10
11	import org.jsoup.nodes.Document;
12	import org.jsoup.nodes.Element;
13	import org.jsoup.select.Elements;
14
15	import dk.thoerup.android.traininfo.common.TimetableBean;
16	import dk.thoerup.android.traininfo.common.TimetableEntry;
17	import dk.thoerup.circuitbreaker.CircuitBreaker;
18	import dk.thoerup.circuitbreaker.CircuitBreakerManager;
19	import dk.thoerup.traininfoservice.Statistics;
20	import dk.thoerup.traininfoservice.TraininfoSettings;
21	import dk.thoerup.traininfoservice.db.StationDAO;
22
23	public class TimetableFetcher {
24
25
26	Map<String, TimetableBean> cache;
27	Map<String, Integer> stationCache;
28
29	StationDAO stationDao = new StationDAO();
30
31
32	Logger logger = Logger.getLogger(TimetableFetcher.class.getName());
33
34	TraininfoSettings settings;
35
36	public TimetableFetcher(TraininfoSettings settings) {
37	this.settings = settings;
38
39	cache = new TimeoutMap<String,TimetableBean>( settings.getCacheTimeout() );
40	stationCache = new TimeoutMap<String,Integer>( 36060*1000 );
41	}
42
43
44	TimetableBean cachedLookupTimetable(String trainID, String type) throws Exception {
45	String key = trainID+type;
46	TimetableBean list = cache.get(key);
47
48	if (list == null) {
49	list = lookupTimetable(trainID,type);
50	cache.put(key, list);
51	} else {
52	Statistics.getInstance().incrementTimetableCacheHits();
53	logger.info("Timetable: Cache hit " + trainID);
54	}
55	return list;
56	}
57
58	TimetableBean lookupTimetable(String trainID, String type) throws Exception {
59	if (settings.getUseAzureSite() == true ){
60	return lookupTimetableAzureSite(trainID, type);
61
62	} else {
63	return lookupTimetableWwwSite(trainID, type);
64	}
65	}
66
67	int getStationId(String name) {
68	Integer id = stationCache.get(name);
69
70	if (id == null) {
71	try {
72	id = stationDao.getIdByName(name);
73	stationCache.put(name, id);
74	} catch (SQLException e) {
75	logger.log(Level.SEVERE, "getStationId failed", e);
76	id = -1;
77	}
78	}
79
80	return id;
81	}
82
83	TimetableBean lookupTimetableAzureSite(String trainID, String type) throws Exception {
84	TimetableBean timetableBean = new TimetableBean();
85
86
87	String url = "http://trafikinfo.bane.dk/TrafikInformation/Ruteplan/" + trainID;
88	logger.fine("URL:" + url);
89
90	JsoupInvocation wrapper = new JsoupInvocation( new URL(url) , settings.getReplyTimeout() );
91	CircuitBreaker breaker = CircuitBreakerManager.getManager().getCircuitBreaker("banedk");
92
93	Document doc = (Document) breaker.invoke(wrapper);
94
95
96	boolean currentStation = false;
97	boolean currentStationSaved = false;
98
99	Elements tables = doc.getElementsByClass("Rute");
100
101	if (tables.size() == 1) {
102	Element timetable = tables.get(0);
103	Elements rows = timetable.getElementsByTag("tr");
104
105	for (int i=0; i<rows.size(); i++) {
106	if (i==0) //First row is column headers
107	continue;
108
109
110	Element row = rows.get(i);
111	Elements fields = row.getElementsByTag("td");
112
113
114	if (currentStationSaved == false && fields.get(0).attr("class").equalsIgnoreCase("Tidsstreg")) {
115	currentStation = true;
116	continue;
117	}
118
119	TimetableEntry entry = new TimetableEntry();
120
121	String station = fields.get(0).text() ;
122	if (station.equals("København"))
123	station = "København H"; //correct inconsistency in naming
124
125	entry.setStation( station );
126	entry.setArrival( fields.get(1).text() );
127	entry.setDeparture( fields.get(2).text() );
128
129	boolean cancelled = fields.get(3).text().equalsIgnoreCase("aflyst");
130	entry.setCancelled(cancelled);
131
132	if (currentStation == true && currentStationSaved == false ) {
133	entry.setCurrent(currentStation);
134	currentStationSaved = true;
135	}
136
137	entry.setStationId( getStationId( station ));
138
139	timetableBean.entries.add(entry);
140	}
141
142	//TODO: There is an off-by-one error in this cancelled parser thingie
143	final String cancelledString = "Aflyst";
144	for (int i=0;i<timetableBean.entries.size(); i++) { //handle cancelled labels
145	final int lastIdx = (timetableBean.entries.size() - 1);
146
147	TimetableEntry current = timetableBean.entries.get(i);
148	if (current.isCancelled()) {
149	if (i == 0) {
150	current.setDeparture(cancelledString);
151	} else if (i == lastIdx) {
152	current.setArrival(cancelledString);
153	} else if (i>0 && i<lastIdx) {
154	TimetableEntry next = timetableBean.entries.get(i+1);
155	TimetableEntry prev = timetableBean.entries.get(i-1);
156
157	if (next.isCancelled())
158	current.setDeparture(cancelledString);
159	if (prev.isCancelled())
160	current.setArrival(cancelledString);
161	}
162	}
163	}
164
165	} else {
166	logger.warning("No time table found, trainID=" + trainID + " type=" + type);
167	}
168
169
170	return timetableBean;
171	}
172
173	TimetableBean lookupTimetableWwwSite(String trainID, String type) throws Exception {
174	TimetableBean timetableBean = new TimetableBean();
175
176	String url = "http://www.bane.dk/visRute.asp?W=" + type + "&TogNr=" + trainID + "&artikelId=4276";
177	logger.fine("URL:" + url);
178
179
180	JsoupInvocation wrapper = new JsoupInvocation( new URL(url) , settings.getReplyTimeout() );
181	CircuitBreaker breaker = CircuitBreakerManager.getManager().getCircuitBreaker("banedk");
182
183	Document doc = (Document) breaker.invoke(wrapper);
184
185
186	boolean currentStation = false;
187	boolean currentStationSaved = false;
188
189	Elements tables = doc.getElementsByClass("Rute");
190
191	if (tables.size() == 1) {
192	Element timetable = tables.get(0);
193	Elements rows = timetable.getElementsByTag("tr");
194
195	for (int i=0; i<rows.size(); i++) {
196	if (i==0) //First row is column headers
197	continue;
198
199
200	Element row = rows.get(i);
201	Elements fields = row.getElementsByTag("td");
202
203
204	if (currentStationSaved == false && fields.get(0).attr("class").equalsIgnoreCase("Tidsstreg")) {
205	currentStation = true;
206	continue;
207	}
208
209	TimetableEntry entry = new TimetableEntry();
210
211	String station = DepartureFetcher.cleanText( fields.get(0).text() ) ;
212	if (station.equals("København"))
213	station = "København H"; //correct inconsistency in naming
214
215	String arrival = DepartureFetcher.cleanText( fields.get(1).text() );
216	String departure = DepartureFetcher.cleanText( fields.get(2).text() );
217
218	entry.setStation( station );
219	entry.setArrival( arrival );
220	entry.setDeparture( departure );
221
222
223	if (currentStation == true && currentStationSaved == false ) {
224	entry.setCurrent(currentStation);
225	currentStationSaved = true;
226	}
227
228	entry.setStationId( getStationId( station ));
229
230	timetableBean.entries.add(entry);
231	}
232
233	} else {
234	logger.warning("No time table found, trainID=" + trainID + " type=" + type);
235	}
236
237
238	return timetableBean;
239	}
240
241	}