traininfoservice/banedk/DepartureFetcher.java

package dk.thoerup.traininfoservice.banedk;


import java.net.URL;
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);
                
                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"; 
                            
            //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");
                    
                    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).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.util.Collections;
6	import java.util.Map;
7	import java.util.logging.Logger;
8
9	import org.jsoup.nodes.Document;
10	import org.jsoup.nodes.Element;
11	import org.jsoup.select.Elements;
12
13	import dk.thoerup.circuitbreaker.CircuitBreaker;
14	import dk.thoerup.circuitbreaker.CircuitBreakerManager;
15	import dk.thoerup.traininfoservice.StationBean;
16	import dk.thoerup.traininfoservice.StationDAO;
17	import dk.thoerup.traininfoservice.Statistics;
18
19	public class DepartureFetcher {
20
21	enum TrainType{
22	STOG,
23	REGIONAL
24	}
25
26	Logger logger = Logger.getLogger(DepartureFetcher.class.getName());
27
28	Map<String, DepartureBean> cache;
29
30	StationDAO stationDao = new StationDAO();
31
32	private boolean useTempSite;
33
34	public DepartureFetcher(boolean tempSite, int cacheTimeout) {
35	useTempSite = tempSite;
36	cache = new TimeoutMap<String,DepartureBean>(cacheTimeout);
37	}
38
39
40
41
42	public DepartureBean cachedLookupDepartures(int stationID, boolean arrival) throws Exception {
43	final String key = "" + stationID + ":" + arrival;
44
45	DepartureBean departureBean = cache.get(key);
46
47
48	if (departureBean == null) {
49	departureBean = lookupDepartures(stationID,arrival);
50	cache.put(key, departureBean);
51	} else {
52	Statistics.getInstance().incrementDepartureCacheHits();
53	logger.info("Departure: Cache hit " + key); //remove before production
54	}
55	return departureBean;
56	}
57
58
59	public DepartureBean lookupDepartures(int stationID, boolean arrival) throws Exception {
60
61	DepartureBean departureBean = new DepartureBean();
62
63	StationBean station = stationDao.getById(stationID);
64
65	if (station.getRegional() != null) {
66	DepartureBean tempBean = lookupDepartures(station.getRegional(), TrainType.REGIONAL, arrival);
67	departureBean.departureEntries.addAll( tempBean.departureEntries );
68	departureBean.notifications.addAll(tempBean.notifications);
69	}
70
71	if (station.getStrain() != null) {
72	DepartureBean tempBean = lookupDepartures(station.getStrain(), TrainType.STOG, arrival);
73	departureBean.departureEntries.addAll( tempBean.departureEntries );
74	departureBean.notifications.addAll(tempBean.notifications);
75	}
76
77	Collections.sort( departureBean.departureEntries );
78
79
80	return departureBean;
81	}
82
83	public DepartureBean lookupDepartures(String stationcode, TrainType type, boolean arrival) throws Exception {
84	if (useTempSite == false) {
85	return lookupDeparturesNormalSite(stationcode, type, arrival);
86	} else {
87	//return lookupDeparturesFromTemporarySite(stationcode, type);
88	//TODO: find out what to to if they ever put a temp site up on trafikinfo.bane.dk
89	return null;
90	}
91	}
92
93	private String getTypeString(TrainType type) {
94	switch (type) {
95	case STOG:
96	return "S-Tog";
97	case REGIONAL:
98	return "Fjerntog";
99	default:
100	return ""; //Can not happen
101	}
102	}
103
104	public DepartureBean lookupDeparturesNormalSite(String stationcode, TrainType type, boolean arrival) throws Exception {
105
106	DepartureBean departureBean = new DepartureBean();
107
108
109	String typeString = getTypeString(type);
110	String arrivalDeparture = (arrival==false) ? "Afgang" : "Ankomst";
111
112	//String uri = "http://www.bane.dk/visStation.asp?ArtikelID=4275&W=" + type + "&S=" + stationcode;
113	String uri = "http://trafikinfo.bane.dk/Trafikinformation/AfgangAnkomst/" + arrivalDeparture + "/" + stationcode + "/" + typeString + "/UdvidetVisning";
114
115	//logger.info("URI: " + uri);
116	JsoupInvocation wrapper = new JsoupInvocation( new URL(uri), 2500);
117	CircuitBreaker breaker = CircuitBreakerManager.getManager().getCircuitBreaker("banedk");
118
119	Document page = (Document) breaker.invoke(wrapper);
120
121	String tableName = arrival == false ? "afgangtabel" : "ankomsttabel";
122	Element table = page.getElementById(tableName);
123
124	if (table != null) {
125	Elements tableRows = table.getElementsByTag("tr");
126
127	for (Element currentRow : tableRows) {
128	String rowClass = currentRow.attr("class");
129	if (rowClass != null && rowClass.toLowerCase().contains("station") ) {
130	Elements fields = currentRow.getElementsByTag("td");
131
132	DepartureEntry departure = new DepartureEntry();
133
134	String time = fields.get(0).text();
135	if (time.equals(""))
136	time = "0:00"; //Bane.dk bug work-around
137	departure.setTime(time);
138
139	int updated = extractUpdated( fields.get(1) );
140	departure.setUpdated(updated);
141
142	String trainNumber = fields.get(2).text();
143	if (type == TrainType.STOG) //If it is S-train we need to extract the trainNumber
144	trainNumber = trainNumber + " " + extractTrainNumber(fields.get(2));
145	departure.setTrainNumber(trainNumber);
146
147	String destination = fields.get(3).text();
148	departure.setDestination(destination);
149
150	String origin = fields.get(4).text();
151	departure.setOrigin(origin);
152
153	String location = fields.get(5).text();
154	departure.setLocation(location);
155
156	String status = fields.get(6).text().trim();
157	departure.setStatus(status);
158
159	String note = extractNote( fields.get(7) );
160	departure.setNote(note);
161
162	departure.setType(typeString);
163
164	departureBean.departureEntries.add( departure );
165	}
166	}
167	} else {
168	logger.warning("No departures found for station=" + stationcode + ", type=" + type);
169	}
170
171	Element notifDiv = page.getElementById("station_planlagte_text");
172	if (notifDiv != null) {
173
174	Elements tables = notifDiv.getElementsByTag("table");
175	for (Element tab : tables) {
176
177	Elements anchors = tab.getElementsByTag("a");
178	if (anchors.size() == 2) {
179	departureBean.notifications.add( anchors.get(1).text() );
180	}
181	}
182
183	}
184
185
186	return departureBean;
187	}
188
189	/*
190	@Deprecated
191	public List<DepartureBean> lookupDeparturesFromTemporarySite(String stationcode, String type) throws Exception {
192
193	List<DepartureBean> departureList = new ArrayList<DepartureBean>();
194
195	final WebClient webClient = new WebClient(BrowserVersion.FIREFOX_3);
196	webClient.setTimeout(2500);
197	webClient.setJavaScriptEnabled(false);
198
199
200	String uri = "http://bane.dk/lite/station.asp?w=" + type + "&s=" + stationcode;
201
202	HtmlunitInvocation wrapper = new HtmlunitInvocation(webClient, uri);
203	CircuitBreaker breaker = CircuitBreakerManager.getManager().getCircuitBreaker("banedk");
204
205	HtmlPage page = (HtmlPage) breaker.invoke(wrapper);
206
207	HtmlElement table = page.getElementById("traf_afgang");
208
209	if (table != null) {
210	DomNodeList<HtmlElement> tableRows = table.getElementsByTagName("tr");
211
212	boolean isFirst = true;
213
214	for (HtmlElement currentRow : tableRows) {
215	if (isFirst == true) { //skip table headers
216	isFirst = false;
217	continue;
218	}
219
220	DomNodeList<HtmlElement> fields = currentRow.getElementsByTagName("td");
221
222	DepartureBean departure = new DepartureBean();
223
224	String time = fields.get(0).asText().trim();
225
226	if (time.equals(""))
227	time = "0:00"; //Bane.dk bug work-around
228	departure.setTime(time);
229
230
231	String trainNumber = fields.get(1).asText();
232	departure.setTrainNumber(trainNumber);
233
234	String destination = fields.get(2).asText();
235	departure.setDestination(destination);
236
237	String origin = fields.get(3).asText();
238	departure.setOrigin(origin);
239
240	String status = fields.get(4).asText();
241	departure.setStatus(status);
242
243	String note = fields.get(5).asText();
244	departure.setNote(note);
245
246	departureList.add(departure);
247	}
248	} else {
249	logger.warning("No departures found for station=" + stationcode + ", type=" + type);
250	}
251	webClient.closeAllWindows();
252
253
254	return departureList;
255	}*/
256
257
258	private int extractUpdated(Element updatedTd) { //extract the digit (in this case: 4) from "media/trafikinfo/opdater4.gif"
259	int updated = -1;
260
261	Elements updatedImgs = updatedTd.getElementsByTag("img");
262	String updatedStr = updatedImgs.get(0).attr("src");
263
264	if (updatedStr != null) {
265	for (int i=0; i<updatedStr.length(); i++) {
266	char c = updatedStr.charAt(i);
267	if ( Character.isDigit(c)) {
268	updated = Character.digit(c, 10);
269	break;
270	}
271	}
272	}
273	return updated;
274	}
275
276	private String extractNote(Element noteTd) {
277	String note = noteTd.text().trim();
278
279
280	Elements elems = noteTd.getElementsByClass("bemtype");
281	if (elems.size() > 0 && note.charAt(note.length()-1) == 'i')
282	note = note.substring(0,note.length() -1 );
283
284	return note;
285	}
286
287	private String extractTrainNumber(Element trainTd) {
288	Element anchorElement = trainTd.getElementsByTag("a").get(0);
289	String href = anchorElement.attr("href");
290
291	int pos = href.lastIndexOf('/');
292	String number = href.substring(pos+1);
293
294	return number;
295	}
296
297	//test
298	/*
299	public static void main(String args[]) throws Exception {
300	DepartureFetcher f = new DepartureFetcher();
301	List<DepartureBean> deps = f.lookupDepartures("AR", "FJRN");
302	for(DepartureBean d : deps) {
303	System.out.println( d.getTime() + ";" + d.getUpdated() + ";" + d.getTrainNumber() + ";" +
304	d.getDestination() + ";" + d.getOrigin() + ";" + d.getLocation() + ";" + d.getStatus() + ";" + d.getNote() );
305	}
306
307	System.out.println("--------------------------");
308	}*/
309	}