traininfoservice/banedk/DepartureFetcher.java

package dk.thoerup.traininfoservice.banedk;


import java.net.URL;
import java.net.URLEncoder;
import java.util.Collections;
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.circuitbreaker.CircuitBreaker;
import dk.thoerup.circuitbreaker.CircuitBreakerManager;
import dk.thoerup.traininfoservice.StationBean;
import dk.thoerup.traininfoservice.StationDAO;
import dk.thoerup.traininfoservice.Statistics;

public class DepartureFetcher {
        
        enum TrainType{
                STOG,
                REGIONAL
        }
        
        Logger logger = Logger.getLogger(DepartureFetcher.class.getName());
        
        Map<String, DepartureBean> cache;
        
        StationDAO stationDao = new StationDAO();
        
        private boolean useAzureSite;
        private int replyTimeout;
        
        public DepartureFetcher(boolean azureSite, int cacheTimeout, int replyTimeout) {
                this.replyTimeout = replyTimeout;
                useAzureSite = azureSite;
                cache = new TimeoutMap<String,DepartureBean>(cacheTimeout);
        }
        
        
        public DepartureBean cachedLookupDepartures(int stationID, boolean arrival) throws Exception {
                final String key = "" + stationID + ":" + arrival;
                
                DepartureBean departureBean = cache.get(key);

                
                if (departureBean == null) {
                        departureBean = lookupDepartures(stationID,arrival);
                        cache.put(key, departureBean);
                } else {
                        Statistics.getInstance().incrementDepartureCacheHits();
                        logger.info("Departure: Cache hit " + key); //remove before production
                }
                return departureBean;
        }
                

        public DepartureBean lookupDepartures(int stationID, boolean arrival) throws Exception {
                
                DepartureBean departureBean = new DepartureBean();
                
                StationBean station = stationDao.getById(stationID);
                
                departureBean.stationName = station.getName();
                
                if (station.getRegional() != null) {
                        DepartureBean tempBean = lookupDepartures(station.getRegional(), TrainType.REGIONAL, arrival);
                        departureBean.departureEntries.addAll( tempBean.departureEntries );
                        departureBean.notifications.addAll(tempBean.notifications);
                }
                
                if (station.getStrain() != null) {
                        DepartureBean tempBean = lookupDepartures(station.getStrain(), TrainType.STOG, arrival);
                        departureBean.departureEntries.addAll( tempBean.departureEntries );
                        departureBean.notifications.addAll(tempBean.notifications);
                }               
                
                Collections.sort( departureBean.departureEntries );

                
                return departureBean;
        }
        
        public DepartureBean lookupDepartures(String stationcode, TrainType type, boolean arrival) throws Exception {
                if (useAzureSite == true) {
                        return lookupDeparturesAzureSite(stationcode, type, arrival);
                } else { 
                        return lookupDeparturesWwwSite(stationcode, type, arrival);
                }
        }
        
        private String getTypeStringAzure(TrainType type) {
                switch (type) {
                case STOG:
                        return "S-Tog";
                case REGIONAL:
                        return "Fjerntog";
                default:
                        return ""; //Can not happen
                }
        }
        
        private String getTypeStringWww(TrainType type) {
                switch (type) {
                case STOG:
                        return "S2";
                case REGIONAL:
                        return "FJRN";
                default:
                        return ""; //Can not happen
                }
        }
        
        public DepartureBean lookupDeparturesAzureSite(String stationcode, TrainType type, boolean arrival) throws Exception {
                
                DepartureBean departureBean = new DepartureBean();
                 
            
            String typeString = getTypeStringAzure(type);
            String arrivalDeparture = (arrival==false) ? "Afgang" : "Ankomst"; 
            
            stationcode = URLEncoder.encode(stationcode,"ISO-8859-1");

            String uri = "http://trafikinfo.bane.dk/Trafikinformation/AfgangAnkomst/" + arrivalDeparture + "/" + stationcode + "/" + typeString + "/UdvidetVisning";        
            
            //logger.info("URI: " + uri);           
            JsoupInvocation wrapper = new JsoupInvocation( new URL(uri), replyTimeout);
            CircuitBreaker breaker = CircuitBreakerManager.getManager().getCircuitBreaker("banedk");
            
            Document page = (Document) breaker.invoke(wrapper);
            
            String tableName = arrival == false ? "afgangtabel" : "ankomsttabel";
            Element table = page.getElementById(tableName);
            
            if (table != null) {
                    Elements tableRows =  table.getElementsByTag("tr");
                    
                    boolean tidsstregExists = (table.getElementsByAttributeValue("class", "Tidsstreg").size() > 0); 
                    boolean passedTidsstreg = false;
                    
                    for (Element currentRow : tableRows) {
                        String rowClass = currentRow.attr("class");
                        
                        if (tidsstregExists == true && passedTidsstreg == false) {
                                if (currentRow.getElementsByAttributeValue("class", "Tidsstreg").size() > 0) {
                                        passedTidsstreg = true;
                                } else {
                                        continue;
                                }
                        }
                        
                        if (rowClass != null && rowClass.toLowerCase().contains("station") ) {
                                
                                Elements fields = currentRow.getElementsByTag("td");
        
                                DepartureEntry departure = new DepartureEntry();
                                
                                String time = fields.get(0).text();
                                if (time.equals(""))
                                        time = "0:00"; //Bane.dk bug work-around
                                departure.setTime(time);
                                
                                int updated = extractUpdated( fields.get(1) );
                                departure.setUpdated(updated);
                                
                                String trainNumber = fields.get(2).text();
                                if (type == TrainType.STOG) //If it is S-train we need to extract the trainNumber 
                                        trainNumber = trainNumber + " " + extractTrainNumber(fields.get(2));
                                departure.setTrainNumber(trainNumber);
                                
                                String destination = fields.get(3).text();
                                departure.setDestination(destination);
                                
                                String origin = fields.get(4).text();
                                departure.setOrigin(origin);
                                
                                String location = fields.get(5).text();
                                departure.setLocation(location);
                                
                                String status = fields.get(6).text().trim();
                                departure.setStatus(status);
                                
                                String note = extractNote( fields.get(7) );
                                departure.setNote(note);
                                
                                departure.setType(typeString);
                                
                                departureBean.departureEntries.add( departure );
                        }
                    }
            } else {
                logger.warning("No departures found for station=" + stationcode + ", type=" + type);
            }
            
            Element notifDiv = page.getElementById("station_planlagte_text");
            if (notifDiv != null) {

                Elements tables = notifDiv.getElementsByTag("table");
                for (Element tab : tables) {

                        Elements anchors = tab.getElementsByTag("a");           
                        if (anchors.size() == 2) {
                                departureBean.notifications.add(  anchors.get(1).text() );
                        }
                }
                
            }
            
            
            return departureBean;
        }
        
        public DepartureBean lookupDeparturesWwwSite(String stationcode, TrainType trainType, boolean arrival) throws Exception {
                
                DepartureBean departureBean = new DepartureBean();
                
                String type = getTypeStringWww(trainType);
                
                                            
            String uri = "http://www.bane.dk/visStation.asp?ArtikelID=4275&W=" + type + "&S=" + stationcode;
            JsoupInvocation wrapper = new JsoupInvocation( new URL(uri), replyTimeout); 
            CircuitBreaker breaker = CircuitBreakerManager.getManager().getCircuitBreaker("banedk");
            
            Element page = (Element) breaker.invoke(wrapper);
            
            String tableName = arrival == false ? "afgangtabel" : "ankomsttabel";
            Element table = page.getElementById(tableName);
            
            if (table != null) {
                    Elements tableRows =  table.getElementsByTag("tr");
                    
                    for (Element currentRow : tableRows) {
                        String rowClass = currentRow.attr("class");
                        if (rowClass != null && rowClass.toLowerCase().contains("station") ) {
                                Elements fields = currentRow.getElementsByTag("td");
        
                                DepartureEntry departure = new DepartureEntry();
                                

                                String time = fields.get(0).getAllElements().get(2).text();
                                if (time.equals(""))
                                        time = "0:00"; //Bane.dk bug work-around
                                departure.setTime(time);
                                logger.info("Time: " + time);// TODO: remove
                                
                                int updated = extractUpdated( fields.get(1) );
                                departure.setUpdated(updated);
                                logger.info("Updated: " + updated);// TODO: remove
                                
                                String trainNumber = fields.get(2).text();
                                if (type.equalsIgnoreCase("S2")) //If it is S-train we need to extract the trainNumber 
                                        trainNumber = trainNumber + " " + extractTrainNumber(fields.get(2));
                                departure.setTrainNumber(trainNumber);
                                logger.info("TrainNumber: " + trainNumber);// TODO: remove
                                
                                String destination = fields.get(3).text();
                                departure.setDestination(destination);
                                
                                String origin = fields.get(4).text();
                                departure.setOrigin(origin);
                                
                                String location = fields.get(5).text();
                                departure.setLocation(location);
                                
                                String status = fields.get(6).text().trim();
                                departure.setStatus(status);
                                
                                String note = extractNote( fields.get(7) );
                                departure.setNote(note);
                                
                                departure.setType(type);
                                
                                departureBean.departureEntries.add(departure);
                                
                                
                        }
                    }
            } else {
                logger.warning("No departures found for station=" + stationcode + ", type=" + type);
            }
            
            
            return departureBean;
        }
                
        
        private int extractUpdated(Element updatedTd) { //extract the digit (in this case: 4) from "media/trafikinfo/opdater4.gif" 
                int updated = -1;
                
                Elements updatedImgs = updatedTd.getElementsByTag("img");
                String updatedStr = updatedImgs.get(0).attr("src");
                
                if (updatedStr != null) {
                        for (int i=0; i<updatedStr.length(); i++) {
                                char c = updatedStr.charAt(i);
                                if ( Character.isDigit(c))  {
                                        updated = Character.digit(c, 10);
                                        break;
                                }
                        }
                }               
                return updated;
        }
        
        private String extractNote(Element noteTd) {
                String note = noteTd.text().trim();
                
                
                Elements elems = noteTd.getElementsByClass("bemtype");
                if (elems.size() > 0 && note.charAt(note.length()-1) == 'i')
                        note = note.substring(0,note.length() -1 );

                return note;
        }
        
        private String extractTrainNumber(Element trainTd) {
                Element anchorElement = trainTd.getElementsByTag("a").get(0);
                String href = anchorElement.attr("href");
                
                int pos = href.lastIndexOf('/');
                String number = href.substring(pos+1);
                
                return number;
        }
        
        //test
        /*
        public static void main(String args[]) throws Exception {
                DepartureFetcher f = new DepartureFetcher();
                List<DepartureBean> deps = f.lookupDepartures("AR", "FJRN");
                for(DepartureBean d : deps) {
                        System.out.println( d.getTime() + ";" + d.getUpdated() + ";" + d.getTrainNumber() + ";" + 
                                                d.getDestination() + ";" + d.getOrigin() + ";" + d.getLocation() + ";" + d.getStatus() + ";" + d.getNote()   );
                }
                
                System.out.println("--------------------------");
        }*/
}
1	package dk.thoerup.traininfoservice.banedk;
2
3
4	import java.net.URL;
5	import java.net.URLEncoder;
6	import java.util.Collections;
7	import java.util.Map;
8	import java.util.logging.Logger;
9
10	import org.jsoup.nodes.Document;
11	import org.jsoup.nodes.Element;
12	import org.jsoup.select.Elements;
13
14	import dk.thoerup.circuitbreaker.CircuitBreaker;
15	import dk.thoerup.circuitbreaker.CircuitBreakerManager;
16	import dk.thoerup.traininfoservice.StationBean;
17	import dk.thoerup.traininfoservice.StationDAO;
18	import dk.thoerup.traininfoservice.Statistics;
19
20	public class DepartureFetcher {
21
22	enum TrainType{
23	STOG,
24	REGIONAL
25	}
26
27	Logger logger = Logger.getLogger(DepartureFetcher.class.getName());
28
29	Map<String, DepartureBean> cache;
30
31	StationDAO stationDao = new StationDAO();
32
33	private boolean useAzureSite;
34	private int replyTimeout;
35
36	public DepartureFetcher(boolean azureSite, int cacheTimeout, int replyTimeout) {
37	this.replyTimeout = replyTimeout;
38	useAzureSite = azureSite;
39	cache = new TimeoutMap<String,DepartureBean>(cacheTimeout);
40	}
41
42
43
44
45	public DepartureBean cachedLookupDepartures(int stationID, boolean arrival) throws Exception {
46	final String key = "" + stationID + ":" + arrival;
47
48	DepartureBean departureBean = cache.get(key);
49
50
51	if (departureBean == null) {
52	departureBean = lookupDepartures(stationID,arrival);
53	cache.put(key, departureBean);
54	} else {
55	Statistics.getInstance().incrementDepartureCacheHits();
56	logger.info("Departure: Cache hit " + key); //remove before production
57	}
58	return departureBean;
59	}
60
61
62	public DepartureBean lookupDepartures(int stationID, boolean arrival) throws Exception {
63
64	DepartureBean departureBean = new DepartureBean();
65
66	StationBean station = stationDao.getById(stationID);
67
68	departureBean.stationName = station.getName();
69
70	if (station.getRegional() != null) {
71	DepartureBean tempBean = lookupDepartures(station.getRegional(), TrainType.REGIONAL, arrival);
72	departureBean.departureEntries.addAll( tempBean.departureEntries );
73	departureBean.notifications.addAll(tempBean.notifications);
74	}
75
76	if (station.getStrain() != null) {
77	DepartureBean tempBean = lookupDepartures(station.getStrain(), TrainType.STOG, arrival);
78	departureBean.departureEntries.addAll( tempBean.departureEntries );
79	departureBean.notifications.addAll(tempBean.notifications);
80	}
81
82	Collections.sort( departureBean.departureEntries );
83
84
85	return departureBean;
86	}
87
88	public DepartureBean lookupDepartures(String stationcode, TrainType type, boolean arrival) throws Exception {
89	if (useAzureSite == true) {
90	return lookupDeparturesAzureSite(stationcode, type, arrival);
91	} else {
92	return lookupDeparturesWwwSite(stationcode, type, arrival);
93	}
94	}
95
96	private String getTypeStringAzure(TrainType type) {
97	switch (type) {
98	case STOG:
99	return "S-Tog";
100	case REGIONAL:
101	return "Fjerntog";
102	default:
103	return ""; //Can not happen
104	}
105	}
106
107	private String getTypeStringWww(TrainType type) {
108	switch (type) {
109	case STOG:
110	return "S2";
111	case REGIONAL:
112	return "FJRN";
113	default:
114	return ""; //Can not happen
115	}
116	}
117
118	public DepartureBean lookupDeparturesAzureSite(String stationcode, TrainType type, boolean arrival) throws Exception {
119
120	DepartureBean departureBean = new DepartureBean();
121
122
123	String typeString = getTypeStringAzure(type);
124	String arrivalDeparture = (arrival==false) ? "Afgang" : "Ankomst";
125
126	stationcode = URLEncoder.encode(stationcode,"ISO-8859-1");
127
128	String uri = "http://trafikinfo.bane.dk/Trafikinformation/AfgangAnkomst/" + arrivalDeparture + "/" + stationcode + "/" + typeString + "/UdvidetVisning";
129
130	//logger.info("URI: " + uri);
131	JsoupInvocation wrapper = new JsoupInvocation( new URL(uri), replyTimeout);
132	CircuitBreaker breaker = CircuitBreakerManager.getManager().getCircuitBreaker("banedk");
133
134	Document page = (Document) breaker.invoke(wrapper);
135
136	String tableName = arrival == false ? "afgangtabel" : "ankomsttabel";
137	Element table = page.getElementById(tableName);
138
139	if (table != null) {
140	Elements tableRows = table.getElementsByTag("tr");
141
142	boolean tidsstregExists = (table.getElementsByAttributeValue("class", "Tidsstreg").size() > 0);
143	boolean passedTidsstreg = false;
144
145	for (Element currentRow : tableRows) {
146	String rowClass = currentRow.attr("class");
147
148	if (tidsstregExists == true && passedTidsstreg == false) {
149	if (currentRow.getElementsByAttributeValue("class", "Tidsstreg").size() > 0) {
150	passedTidsstreg = true;
151	} else {
152	continue;
153	}
154	}
155
156	if (rowClass != null && rowClass.toLowerCase().contains("station") ) {
157
158	Elements fields = currentRow.getElementsByTag("td");
159
160	DepartureEntry departure = new DepartureEntry();
161
162	String time = fields.get(0).text();
163	if (time.equals(""))
164	time = "0:00"; //Bane.dk bug work-around
165	departure.setTime(time);
166
167	int updated = extractUpdated( fields.get(1) );
168	departure.setUpdated(updated);
169
170	String trainNumber = fields.get(2).text();
171	if (type == TrainType.STOG) //If it is S-train we need to extract the trainNumber
172	trainNumber = trainNumber + " " + extractTrainNumber(fields.get(2));
173	departure.setTrainNumber(trainNumber);
174
175	String destination = fields.get(3).text();
176	departure.setDestination(destination);
177
178	String origin = fields.get(4).text();
179	departure.setOrigin(origin);
180
181	String location = fields.get(5).text();
182	departure.setLocation(location);
183
184	String status = fields.get(6).text().trim();
185	departure.setStatus(status);
186
187	String note = extractNote( fields.get(7) );
188	departure.setNote(note);
189
190	departure.setType(typeString);
191
192	departureBean.departureEntries.add( departure );
193	}
194	}
195	} else {
196	logger.warning("No departures found for station=" + stationcode + ", type=" + type);
197	}
198
199	Element notifDiv = page.getElementById("station_planlagte_text");
200	if (notifDiv != null) {
201
202	Elements tables = notifDiv.getElementsByTag("table");
203	for (Element tab : tables) {
204
205	Elements anchors = tab.getElementsByTag("a");
206	if (anchors.size() == 2) {
207	departureBean.notifications.add( anchors.get(1).text() );
208	}
209	}
210
211	}
212
213
214	return departureBean;
215	}
216
217	public DepartureBean lookupDeparturesWwwSite(String stationcode, TrainType trainType, boolean arrival) throws Exception {
218
219	DepartureBean departureBean = new DepartureBean();
220
221	String type = getTypeStringWww(trainType);
222
223
224	String uri = "http://www.bane.dk/visStation.asp?ArtikelID=4275&W=" + type + "&S=" + stationcode;
225	JsoupInvocation wrapper = new JsoupInvocation( new URL(uri), replyTimeout);
226	CircuitBreaker breaker = CircuitBreakerManager.getManager().getCircuitBreaker("banedk");
227
228	Element page = (Element) breaker.invoke(wrapper);
229
230	String tableName = arrival == false ? "afgangtabel" : "ankomsttabel";
231	Element table = page.getElementById(tableName);
232
233	if (table != null) {
234	Elements tableRows = table.getElementsByTag("tr");
235
236	for (Element currentRow : tableRows) {
237	String rowClass = currentRow.attr("class");
238	if (rowClass != null && rowClass.toLowerCase().contains("station") ) {
239	Elements fields = currentRow.getElementsByTag("td");
240
241	DepartureEntry departure = new DepartureEntry();
242
243
244
245	String time = fields.get(0).getAllElements().get(2).text();
246	if (time.equals(""))
247	time = "0:00"; //Bane.dk bug work-around
248	departure.setTime(time);
249	logger.info("Time: " + time);// TODO: remove
250
251	int updated = extractUpdated( fields.get(1) );
252	departure.setUpdated(updated);
253	logger.info("Updated: " + updated);// TODO: remove
254
255	String trainNumber = fields.get(2).text();
256	if (type.equalsIgnoreCase("S2")) //If it is S-train we need to extract the trainNumber
257	trainNumber = trainNumber + " " + extractTrainNumber(fields.get(2));
258	departure.setTrainNumber(trainNumber);
259	logger.info("TrainNumber: " + trainNumber);// TODO: remove
260
261	String destination = fields.get(3).text();
262	departure.setDestination(destination);
263
264	String origin = fields.get(4).text();
265	departure.setOrigin(origin);
266
267	String location = fields.get(5).text();
268	departure.setLocation(location);
269
270	String status = fields.get(6).text().trim();
271	departure.setStatus(status);
272
273	String note = extractNote( fields.get(7) );
274	departure.setNote(note);
275
276	departure.setType(type);
277
278	departureBean.departureEntries.add(departure);
279
280
281	}
282	}
283	} else {
284	logger.warning("No departures found for station=" + stationcode + ", type=" + type);
285	}
286
287
288	return departureBean;
289	}
290
291
292	private int extractUpdated(Element updatedTd) { //extract the digit (in this case: 4) from "media/trafikinfo/opdater4.gif"
293	int updated = -1;
294
295	Elements updatedImgs = updatedTd.getElementsByTag("img");
296	String updatedStr = updatedImgs.get(0).attr("src");
297
298	if (updatedStr != null) {
299	for (int i=0; i<updatedStr.length(); i++) {
300	char c = updatedStr.charAt(i);
301	if ( Character.isDigit(c)) {
302	updated = Character.digit(c, 10);
303	break;
304	}
305	}
306	}
307	return updated;
308	}
309
310	private String extractNote(Element noteTd) {
311	String note = noteTd.text().trim();
312
313
314	Elements elems = noteTd.getElementsByClass("bemtype");
315	if (elems.size() > 0 && note.charAt(note.length()-1) == 'i')
316	note = note.substring(0,note.length() -1 );
317
318	return note;
319	}
320
321	private String extractTrainNumber(Element trainTd) {
322	Element anchorElement = trainTd.getElementsByTag("a").get(0);
323	String href = anchorElement.attr("href");
324
325	int pos = href.lastIndexOf('/');
326	String number = href.substring(pos+1);
327
328	return number;
329	}
330
331	//test
332	/*
333	public static void main(String args[]) throws Exception {
334	DepartureFetcher f = new DepartureFetcher();
335	List<DepartureBean> deps = f.lookupDepartures("AR", "FJRN");
336	for(DepartureBean d : deps) {
337	System.out.println( d.getTime() + ";" + d.getUpdated() + ";" + d.getTrainNumber() + ";" +
338	d.getDestination() + ";" + d.getOrigin() + ";" + d.getLocation() + ";" + d.getStatus() + ";" + d.getNote() );
339	}
340
341	System.out.println("--------------------------");
342	}*/
343	}