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 useTempSite;
        
        public DepartureFetcher(boolean tempSite, int cacheTimeout) {
                useTempSite = tempSite;
                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 (useTempSite == false) {
                        return lookupDeparturesNormalSite(stationcode, type, arrival);
                } else {
                        //return lookupDeparturesFromTemporarySite(stationcode, type);
                        //TODO: find out what to to if they ever put a temp site up on trafikinfo.bane.dk 
                        return null;
                }
        }
        
        private String getTypeString(TrainType type) {
                switch (type) {
                case STOG:
                        return "S-Tog";
                case REGIONAL:
                        return "Fjerntog";
                default:
                        return ""; //Can not happen
                }
        }
        
        public DepartureBean lookupDeparturesNormalSite(String stationcode, TrainType type, boolean arrival) throws Exception {
                
                DepartureBean departureBean = new DepartureBean();
                 
            
            String typeString = getTypeString(type);
            String arrivalDeparture = (arrival==false) ? "Afgang" : "Ankomst"; 
            
            stationcode = URLEncoder.encode(stationcode,"ISO-8859-1");
            //String uri = "http://www.bane.dk/visStation.asp?ArtikelID=4275&W=" + type + "&S=" + stationcode;
            String uri = "http://trafikinfo.bane.dk/Trafikinformation/AfgangAnkomst/" + arrivalDeparture + "/" + stationcode + "/" + typeString + "/UdvidetVisning";

            
            //logger.info("URI: " + uri);           
            JsoupInvocation wrapper = new JsoupInvocation( new URL(uri), 2500);
            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;
        }
        
        /*
        @Deprecated
        public List<DepartureBean> lookupDeparturesFromTemporarySite(String stationcode, String type) throws Exception {
                
                List<DepartureBean> departureList = new ArrayList<DepartureBean>();
                
            final WebClient webClient = new WebClient(BrowserVersion.FIREFOX_3);
            webClient.setTimeout(2500);
            webClient.setJavaScriptEnabled(false);
            

            String uri = "http://bane.dk/lite/station.asp?w=" + type + "&s=" + stationcode;
            
            HtmlunitInvocation wrapper = new HtmlunitInvocation(webClient, uri);
            CircuitBreaker breaker = CircuitBreakerManager.getManager().getCircuitBreaker("banedk");
            
            HtmlPage page = (HtmlPage) breaker.invoke(wrapper);
            
            HtmlElement table = page.getElementById("traf_afgang");
            
            if (table != null) {                        
                    DomNodeList<HtmlElement> tableRows =  table.getElementsByTagName("tr");
                    
                    boolean isFirst = true;
                    
                    for (HtmlElement currentRow : tableRows) {
                        if (isFirst == true) { //skip table headers
                                isFirst = false;
                                continue;
                        }
                        
                        DomNodeList<HtmlElement> fields = currentRow.getElementsByTagName("td");

                        DepartureBean departure = new DepartureBean();

                        String time = fields.get(0).asText().trim();

                        if (time.equals(""))
                                time = "0:00"; //Bane.dk bug work-around
                        departure.setTime(time);


                        String trainNumber = fields.get(1).asText();
                        departure.setTrainNumber(trainNumber);

                        String destination = fields.get(2).asText();
                        departure.setDestination(destination);

                        String origin = fields.get(3).asText();
                        departure.setOrigin(origin);

                        String status = fields.get(4).asText();
                        departure.setStatus(status);

                        String note = fields.get(5).asText();
                        departure.setNote(note);

                        departureList.add(departure);
                    }
            } else {
                logger.warning("No departures found for station=" + stationcode + ", type=" + type);
            }
            webClient.closeAllWindows();
            
            
            return departureList;
        }*/

        
        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 useTempSite;
34
35	public DepartureFetcher(boolean tempSite, int cacheTimeout) {
36	useTempSite = tempSite;
37	cache = new TimeoutMap<String,DepartureBean>(cacheTimeout);
38	}
39
40
41
42
43	public DepartureBean cachedLookupDepartures(int stationID, boolean arrival) throws Exception {
44	final String key = "" + stationID + ":" + arrival;
45
46	DepartureBean departureBean = cache.get(key);
47
48
49	if (departureBean == null) {
50	departureBean = lookupDepartures(stationID,arrival);
51	cache.put(key, departureBean);
52	} else {
53	Statistics.getInstance().incrementDepartureCacheHits();
54	logger.info("Departure: Cache hit " + key); //remove before production
55	}
56	return departureBean;
57	}
58
59
60	public DepartureBean lookupDepartures(int stationID, boolean arrival) throws Exception {
61
62	DepartureBean departureBean = new DepartureBean();
63
64	StationBean station = stationDao.getById(stationID);
65
66	departureBean.stationName = station.getName();
67
68	if (station.getRegional() != null) {
69	DepartureBean tempBean = lookupDepartures(station.getRegional(), TrainType.REGIONAL, arrival);
70	departureBean.departureEntries.addAll( tempBean.departureEntries );
71	departureBean.notifications.addAll(tempBean.notifications);
72	}
73
74	if (station.getStrain() != null) {
75	DepartureBean tempBean = lookupDepartures(station.getStrain(), TrainType.STOG, arrival);
76	departureBean.departureEntries.addAll( tempBean.departureEntries );
77	departureBean.notifications.addAll(tempBean.notifications);
78	}
79
80	Collections.sort( departureBean.departureEntries );
81
82
83	return departureBean;
84	}
85
86	public DepartureBean lookupDepartures(String stationcode, TrainType type, boolean arrival) throws Exception {
87	if (useTempSite == false) {
88	return lookupDeparturesNormalSite(stationcode, type, arrival);
89	} else {
90	//return lookupDeparturesFromTemporarySite(stationcode, type);
91	//TODO: find out what to to if they ever put a temp site up on trafikinfo.bane.dk
92	return null;
93	}
94	}
95
96	private String getTypeString(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	public DepartureBean lookupDeparturesNormalSite(String stationcode, TrainType type, boolean arrival) throws Exception {
108
109	DepartureBean departureBean = new DepartureBean();
110
111
112	String typeString = getTypeString(type);
113	String arrivalDeparture = (arrival==false) ? "Afgang" : "Ankomst";
114
115	stationcode = URLEncoder.encode(stationcode,"ISO-8859-1");
116	//String uri = "http://www.bane.dk/visStation.asp?ArtikelID=4275&W=" + type + "&S=" + stationcode;
117	String uri = "http://trafikinfo.bane.dk/Trafikinformation/AfgangAnkomst/" + arrivalDeparture + "/" + stationcode + "/" + typeString + "/UdvidetVisning";
118
119
120
121	//logger.info("URI: " + uri);
122	JsoupInvocation wrapper = new JsoupInvocation( new URL(uri), 2500);
123	CircuitBreaker breaker = CircuitBreakerManager.getManager().getCircuitBreaker("banedk");
124
125	Document page = (Document) breaker.invoke(wrapper);
126
127	String tableName = arrival == false ? "afgangtabel" : "ankomsttabel";
128	Element table = page.getElementById(tableName);
129
130	if (table != null) {
131	Elements tableRows = table.getElementsByTag("tr");
132
133	boolean tidsstregExists = (table.getElementsByAttributeValue("class", "Tidsstreg").size() > 0);
134	boolean passedTidsstreg = false;
135
136	for (Element currentRow : tableRows) {
137	String rowClass = currentRow.attr("class");
138
139	if (tidsstregExists == true && passedTidsstreg == false) {
140	if (currentRow.getElementsByAttributeValue("class", "Tidsstreg").size() > 0) {
141	passedTidsstreg = true;
142	} else {
143	continue;
144	}
145	}
146
147	if (rowClass != null && rowClass.toLowerCase().contains("station") ) {
148
149	Elements fields = currentRow.getElementsByTag("td");
150
151	DepartureEntry departure = new DepartureEntry();
152
153	String time = fields.get(0).text();
154	if (time.equals(""))
155	time = "0:00"; //Bane.dk bug work-around
156	departure.setTime(time);
157
158	int updated = extractUpdated( fields.get(1) );
159	departure.setUpdated(updated);
160
161	String trainNumber = fields.get(2).text();
162	if (type == TrainType.STOG) //If it is S-train we need to extract the trainNumber
163	trainNumber = trainNumber + " " + extractTrainNumber(fields.get(2));
164	departure.setTrainNumber(trainNumber);
165
166	String destination = fields.get(3).text();
167	departure.setDestination(destination);
168
169	String origin = fields.get(4).text();
170	departure.setOrigin(origin);
171
172	String location = fields.get(5).text();
173	departure.setLocation(location);
174
175	String status = fields.get(6).text().trim();
176	departure.setStatus(status);
177
178	String note = extractNote( fields.get(7) );
179	departure.setNote(note);
180
181	departure.setType(typeString);
182
183	departureBean.departureEntries.add( departure );
184	}
185	}
186	} else {
187	logger.warning("No departures found for station=" + stationcode + ", type=" + type);
188	}
189
190	Element notifDiv = page.getElementById("station_planlagte_text");
191	if (notifDiv != null) {
192
193	Elements tables = notifDiv.getElementsByTag("table");
194	for (Element tab : tables) {
195
196	Elements anchors = tab.getElementsByTag("a");
197	if (anchors.size() == 2) {
198	departureBean.notifications.add( anchors.get(1).text() );
199	}
200	}
201
202	}
203
204
205	return departureBean;
206	}
207
208	/*
209	@Deprecated
210	public List<DepartureBean> lookupDeparturesFromTemporarySite(String stationcode, String type) throws Exception {
211
212	List<DepartureBean> departureList = new ArrayList<DepartureBean>();
213
214	final WebClient webClient = new WebClient(BrowserVersion.FIREFOX_3);
215	webClient.setTimeout(2500);
216	webClient.setJavaScriptEnabled(false);
217
218
219	String uri = "http://bane.dk/lite/station.asp?w=" + type + "&s=" + stationcode;
220
221	HtmlunitInvocation wrapper = new HtmlunitInvocation(webClient, uri);
222	CircuitBreaker breaker = CircuitBreakerManager.getManager().getCircuitBreaker("banedk");
223
224	HtmlPage page = (HtmlPage) breaker.invoke(wrapper);
225
226	HtmlElement table = page.getElementById("traf_afgang");
227
228	if (table != null) {
229	DomNodeList<HtmlElement> tableRows = table.getElementsByTagName("tr");
230
231	boolean isFirst = true;
232
233	for (HtmlElement currentRow : tableRows) {
234	if (isFirst == true) { //skip table headers
235	isFirst = false;
236	continue;
237	}
238
239	DomNodeList<HtmlElement> fields = currentRow.getElementsByTagName("td");
240
241	DepartureBean departure = new DepartureBean();
242
243	String time = fields.get(0).asText().trim();
244
245	if (time.equals(""))
246	time = "0:00"; //Bane.dk bug work-around
247	departure.setTime(time);
248
249
250	String trainNumber = fields.get(1).asText();
251	departure.setTrainNumber(trainNumber);
252
253	String destination = fields.get(2).asText();
254	departure.setDestination(destination);
255
256	String origin = fields.get(3).asText();
257	departure.setOrigin(origin);
258
259	String status = fields.get(4).asText();
260	departure.setStatus(status);
261
262	String note = fields.get(5).asText();
263	departure.setNote(note);
264
265	departureList.add(departure);
266	}
267	} else {
268	logger.warning("No departures found for station=" + stationcode + ", type=" + type);
269	}
270	webClient.closeAllWindows();
271
272
273	return departureList;
274	}*/
275
276
277	private int extractUpdated(Element updatedTd) { //extract the digit (in this case: 4) from "media/trafikinfo/opdater4.gif"
278	int updated = -1;
279
280	Elements updatedImgs = updatedTd.getElementsByTag("img");
281	String updatedStr = updatedImgs.get(0).attr("src");
282
283	if (updatedStr != null) {
284	for (int i=0; i<updatedStr.length(); i++) {
285	char c = updatedStr.charAt(i);
286	if ( Character.isDigit(c)) {
287	updated = Character.digit(c, 10);
288	break;
289	}
290	}
291	}
292	return updated;
293	}
294
295	private String extractNote(Element noteTd) {
296	String note = noteTd.text().trim();
297
298
299	Elements elems = noteTd.getElementsByClass("bemtype");
300	if (elems.size() > 0 && note.charAt(note.length()-1) == 'i')
301	note = note.substring(0,note.length() -1 );
302
303	return note;
304	}
305
306	private String extractTrainNumber(Element trainTd) {
307	Element anchorElement = trainTd.getElementsByTag("a").get(0);
308	String href = anchorElement.attr("href");
309
310	int pos = href.lastIndexOf('/');
311	String number = href.substring(pos+1);
312
313	return number;
314	}
315
316	//test
317	/*
318	public static void main(String args[]) throws Exception {
319	DepartureFetcher f = new DepartureFetcher();
320	List<DepartureBean> deps = f.lookupDepartures("AR", "FJRN");
321	for(DepartureBean d : deps) {
322	System.out.println( d.getTime() + ";" + d.getUpdated() + ";" + d.getTrainNumber() + ";" +
323	d.getDestination() + ";" + d.getOrigin() + ";" + d.getLocation() + ";" + d.getStatus() + ";" + d.getNote() );
324	}
325
326	System.out.println("--------------------------");
327	}*/
328	}