traininfoservice/banedk/DepartureFetcher.java

package dk.thoerup.traininfoservice.banedk;


import java.util.Collections;
import java.util.List;
import java.util.Map;
import java.util.logging.Logger;

import com.gargoylesoftware.htmlunit.BrowserVersion;
import com.gargoylesoftware.htmlunit.WebClient;
import com.gargoylesoftware.htmlunit.html.DomNodeList;
import com.gargoylesoftware.htmlunit.html.HtmlElement;
import com.gargoylesoftware.htmlunit.html.HtmlPage;

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;*/
                
                return lookupDepartures(stationID,arrival);
        }
                

        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();
                
            final WebClient webClient = new WebClient( BrowserVersion.FIREFOX_3 );
            webClient.setTimeout(2500);
            webClient.setJavaScriptEnabled(false);
            
            
            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);
            HtmlunitInvocation wrapper = new HtmlunitInvocation(webClient, uri);
            CircuitBreaker breaker = CircuitBreakerManager.getManager().getCircuitBreaker("banedk");
            
            HtmlPage page = (HtmlPage) breaker.invoke(wrapper);
            
            String tableName = arrival == false ? "afgangtabel" : "ankomsttabel";
            HtmlElement table = page.getElementById(tableName);
            
            if (table != null) {
                    DomNodeList<HtmlElement> tableRows =  table.getElementsByTagName("tr");
                    
                    for (HtmlElement currentRow : tableRows) {
                        String rowClass = currentRow.getAttribute("class");
                        if (rowClass != null && rowClass.toLowerCase().contains("station") ) {
                                DomNodeList<HtmlElement> fields = currentRow.getElementsByTagName("td");
        
                                DepartureEntry departure = new DepartureEntry();
                                
                                String time = fields.get(0).asText();
                                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).asText();
                                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).asText();
                                departure.setDestination(destination);
                                
                                String origin = fields.get(4).asText();
                                departure.setOrigin(origin);
                                
                                String location = fields.get(5).asText();
                                departure.setLocation(location);
                                
                                String status = fields.get(6).asText().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);
            }
            
            HtmlElement notifDiv = page.getElementById("station_planlagte_text");
            if (notifDiv != null) {

                DomNodeList<HtmlElement> tables = notifDiv.getElementsByTagName("table");
                for (HtmlElement tab : tables) {

                        DomNodeList<HtmlElement> anchors = tab.getElementsByTagName("a");               
                        if (anchors.size() == 2) {
                                departureBean.notifications.add(  anchors.get(1).getTextContent() );
                        }
                }
                
            }
            
            
            webClient.closeAllWindows();
            
            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(HtmlElement updatedTd) { //extract the digit (in this case: 4) from "media/trafikinfo/opdater4.gif" 
                int updated = -1;
                
                DomNodeList<HtmlElement> updatedImgs = updatedTd.getElementsByTagName("img");
                String updatedStr = updatedImgs.get(0).getAttribute("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(HtmlElement noteTd) {
                String note = noteTd.asText().trim();
                
                List<HtmlElement> elems = noteTd.getElementsByAttribute("span", "class", "bemtype");
                if (elems.size() > 0 && note.charAt(note.length()-1) == 'i')
                        note = note.substring(0,note.length() -1 );

                return note;
        }
        
        private String extractTrainNumber(HtmlElement trainTd) {
                HtmlElement anchorElement = trainTd.getElementsByTagName("a").get(0);
                String href = anchorElement.getAttribute("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	torben	305	package dk.thoerup.traininfoservice.banedk;
2
3	torben	978
4	torben	307	import java.util.Collections;
5	torben	305	import java.util.List;
6	torben	428	import java.util.Map;
7	torben	348	import java.util.logging.Logger;
8	torben	305
9	torben	591	import com.gargoylesoftware.htmlunit.BrowserVersion;
10	torben	305	import com.gargoylesoftware.htmlunit.WebClient;
11			import com.gargoylesoftware.htmlunit.html.DomNodeList;
12			import com.gargoylesoftware.htmlunit.html.HtmlElement;
13			import com.gargoylesoftware.htmlunit.html.HtmlPage;
14
15	torben	468	import dk.thoerup.circuitbreaker.CircuitBreaker;
16			import dk.thoerup.circuitbreaker.CircuitBreakerManager;
17	torben	588	import dk.thoerup.traininfoservice.StationBean;
18			import dk.thoerup.traininfoservice.StationDAO;
19	torben	711	import dk.thoerup.traininfoservice.Statistics;
20	torben	307
21	torben	305	public class DepartureFetcher {
22	torben	348
23	torben	972	enum TrainType{
24			STOG,
25			REGIONAL
26			}
27
28	torben	348	Logger logger = Logger.getLogger(DepartureFetcher.class.getName());
29	torben	387
30	torben	978	Map<String, DepartureBean> cache;
31	torben	387
32	torben	588	StationDAO stationDao = new StationDAO();
33
34	torben	580	private boolean useTempSite;
35
36	torben	584	public DepartureFetcher(boolean tempSite, int cacheTimeout) {
37	torben	580	useTempSite = tempSite;
38	torben	978	cache = new TimeoutMap<String,DepartureBean>(cacheTimeout);
39	torben	580	}
40
41
42	torben	307
43	torben	387
44	torben	978	public DepartureBean cachedLookupDepartures(int stationID, boolean arrival) throws Exception {
45	torben	829	final String key = "" + stationID + ":" + arrival;
46	torben	978	/*
47			DepartureBean departureBean = cache.get(key);
48	torben	308
49	torben	387
50	torben	978	if (departureBean == null) {
51			departureBean = lookupDepartures(stationID,arrival);
52			cache.put(key, departureBean);
53	torben	387	} else {
54	torben	711	Statistics.getInstance().incrementDepartureCacheHits();
55	torben	829	logger.info("Departure: Cache hit " + key); //remove before production
56	torben	387	}
57	torben	978	return departureBean;*/
58
59			return lookupDepartures(stationID,arrival);
60	torben	387	}
61
62
63	torben	978	public DepartureBean lookupDepartures(int stationID, boolean arrival) throws Exception {
64	torben	307
65	torben	978	DepartureBean departureBean = new DepartureBean();
66
67	torben	588	StationBean station = stationDao.getById(stationID);
68	torben	307
69	torben	588	if (station.getRegional() != null) {
70	torben	978	DepartureBean tempBean = lookupDepartures(station.getRegional(), TrainType.REGIONAL, arrival);
71			departureBean.departureEntries.addAll( tempBean.departureEntries );
72			departureBean.notifications.addAll(tempBean.notifications);
73	torben	307	}
74
75	torben	588	if (station.getStrain() != null) {
76	torben	978	DepartureBean tempBean = lookupDepartures(station.getStrain(), TrainType.STOG, arrival);
77			departureBean.departureEntries.addAll( tempBean.departureEntries );
78			departureBean.notifications.addAll(tempBean.notifications);
79	torben	588	}
80
81	torben	978	Collections.sort( departureBean.departureEntries );
82	torben	588
83
84	torben	978	return departureBean;
85	torben	305	}
86
87	torben	978	public DepartureBean lookupDepartures(String stationcode, TrainType type, boolean arrival) throws Exception {
88	torben	580	if (useTempSite == false) {
89	torben	829	return lookupDeparturesNormalSite(stationcode, type, arrival);
90	torben	580	} else {
91	torben	972	//return lookupDeparturesFromTemporarySite(stationcode, type);
92			//TODO: find out what to to if they ever put a temp site up on trafikinfo.bane.dk
93			return null;
94	torben	580	}
95			}
96
97	torben	972	private String getTypeString(TrainType type) {
98			switch (type) {
99			case STOG:
100			return "S-Tog";
101			case REGIONAL:
102			return "Fjerntog";
103			default:
104			return ""; //Can not happen
105			}
106			}
107
108	torben	978	public DepartureBean lookupDeparturesNormalSite(String stationcode, TrainType type, boolean arrival) throws Exception {
109	torben	305
110	torben	978	DepartureBean departureBean = new DepartureBean();
111	torben	305
112	torben	591	final WebClient webClient = new WebClient( BrowserVersion.FIREFOX_3 );
113	torben	386	webClient.setTimeout(2500);
114	torben	313	webClient.setJavaScriptEnabled(false);
115	torben	970
116	torben	972
117			String typeString = getTypeString(type);
118	torben	970	String arrivalDeparture = (arrival==false) ? "Afgang" : "Ankomst";
119	torben	313
120	torben	970	//String uri = "http://www.bane.dk/visStation.asp?ArtikelID=4275&W=" + type + "&S=" + stationcode;
121	torben	972	String uri = "http://trafikinfo.bane.dk/Trafikinformation/AfgangAnkomst/" + arrivalDeparture + "/" + stationcode + "/" + typeString + "/UdvidetVisning";
122	torben	970
123	torben	971	//logger.info("URI: " + uri);
124	torben	939	HtmlunitInvocation wrapper = new HtmlunitInvocation(webClient, uri);
125	torben	421	CircuitBreaker breaker = CircuitBreakerManager.getManager().getCircuitBreaker("banedk");
126	torben	305
127	torben	421	HtmlPage page = (HtmlPage) breaker.invoke(wrapper);
128	torben	305
129	torben	829	String tableName = arrival == false ? "afgangtabel" : "ankomsttabel";
130			HtmlElement table = page.getElementById(tableName);
131
132	torben	342	if (table != null) {
133			DomNodeList<HtmlElement> tableRows = table.getElementsByTagName("tr");
134
135			for (HtmlElement currentRow : tableRows) {
136			String rowClass = currentRow.getAttribute("class");
137			if (rowClass != null && rowClass.toLowerCase().contains("station") ) {
138			DomNodeList<HtmlElement> fields = currentRow.getElementsByTagName("td");
139
140	torben	978	DepartureEntry departure = new DepartureEntry();
141	torben	342
142			String time = fields.get(0).asText();
143	torben	375	if (time.equals(""))
144			time = "0:00"; //Bane.dk bug work-around
145	torben	342	departure.setTime(time);
146
147			int updated = extractUpdated( fields.get(1) );
148			departure.setUpdated(updated);
149
150			String trainNumber = fields.get(2).asText();
151	torben	972	if (type == TrainType.STOG) //If it is S-train we need to extract the trainNumber
152	torben	349	trainNumber = trainNumber + " " + extractTrainNumber(fields.get(2));
153	torben	342	departure.setTrainNumber(trainNumber);
154
155			String destination = fields.get(3).asText();
156			departure.setDestination(destination);
157
158			String origin = fields.get(4).asText();
159			departure.setOrigin(origin);
160
161			String location = fields.get(5).asText();
162			departure.setLocation(location);
163
164	torben	860	String status = fields.get(6).asText().trim();
165	torben	342	departure.setStatus(status);
166
167			String note = extractNote( fields.get(7) );
168			departure.setNote(note);
169
170	torben	972	departure.setType(typeString);
171	torben	697
172	torben	978	departureBean.departureEntries.add( departure );
173	torben	342	}
174			}
175	torben	348	} else {
176			logger.warning("No departures found for station=" + stationcode + ", type=" + type);
177	torben	305	}
178	torben	978
179			HtmlElement notifDiv = page.getElementById("station_planlagte_text");
180			if (notifDiv != null) {
181
182			DomNodeList<HtmlElement> tables = notifDiv.getElementsByTagName("table");
183			for (HtmlElement tab : tables) {
184
185			DomNodeList<HtmlElement> anchors = tab.getElementsByTagName("a");
186			if (anchors.size() == 2) {
187			departureBean.notifications.add( anchors.get(1).getTextContent() );
188			}
189			}
190
191			}
192
193
194	torben	591	webClient.closeAllWindows();
195	torben	348
196	torben	978	return departureBean;
197	torben	305	}
198
199	torben	974	/*
200			@Deprecated
201	torben	580	public List<DepartureBean> lookupDeparturesFromTemporarySite(String stationcode, String type) throws Exception {
202
203			List<DepartureBean> departureList = new ArrayList<DepartureBean>();
204
205	torben	591	final WebClient webClient = new WebClient(BrowserVersion.FIREFOX_3);
206	torben	580	webClient.setTimeout(2500);
207			webClient.setJavaScriptEnabled(false);
208
209
210			String uri = "http://bane.dk/lite/station.asp?w=" + type + "&s=" + stationcode;
211
212	torben	939	HtmlunitInvocation wrapper = new HtmlunitInvocation(webClient, uri);
213	torben	580	CircuitBreaker breaker = CircuitBreakerManager.getManager().getCircuitBreaker("banedk");
214
215			HtmlPage page = (HtmlPage) breaker.invoke(wrapper);
216
217			HtmlElement table = page.getElementById("traf_afgang");
218
219			if (table != null) {
220			DomNodeList<HtmlElement> tableRows = table.getElementsByTagName("tr");
221
222			boolean isFirst = true;
223
224			for (HtmlElement currentRow : tableRows) {
225			if (isFirst == true) { //skip table headers
226			isFirst = false;
227			continue;
228			}
229
230			DomNodeList<HtmlElement> fields = currentRow.getElementsByTagName("td");
231
232			DepartureBean departure = new DepartureBean();
233
234			String time = fields.get(0).asText().trim();
235	torben	583
236	torben	580	if (time.equals(""))
237			time = "0:00"; //Bane.dk bug work-around
238			departure.setTime(time);
239
240
241			String trainNumber = fields.get(1).asText();
242			departure.setTrainNumber(trainNumber);
243
244			String destination = fields.get(2).asText();
245			departure.setDestination(destination);
246
247			String origin = fields.get(3).asText();
248			departure.setOrigin(origin);
249
250			String status = fields.get(4).asText();
251			departure.setStatus(status);
252
253	torben	582	String note = fields.get(5).asText();
254	torben	580	departure.setNote(note);
255
256			departureList.add(departure);
257			}
258			} else {
259			logger.warning("No departures found for station=" + stationcode + ", type=" + type);
260			}
261	torben	591	webClient.closeAllWindows();
262	torben	580
263	torben	591
264	torben	580	return departureList;
265	torben	974	}*/
266	torben	580
267
268	torben	305	private int extractUpdated(HtmlElement updatedTd) { //extract the digit (in this case: 4) from "media/trafikinfo/opdater4.gif"
269			int updated = -1;
270
271			DomNodeList<HtmlElement> updatedImgs = updatedTd.getElementsByTagName("img");
272			String updatedStr = updatedImgs.get(0).getAttribute("src");
273
274			if (updatedStr != null) {
275			for (int i=0; i<updatedStr.length(); i++) {
276			char c = updatedStr.charAt(i);
277			if ( Character.isDigit(c)) {
278			updated = Character.digit(c, 10);
279			break;
280			}
281			}
282			}
283			return updated;
284			}
285
286	torben	313	private String extractNote(HtmlElement noteTd) {
287			String note = noteTd.asText().trim();
288
289			List<HtmlElement> elems = noteTd.getElementsByAttribute("span", "class", "bemtype");
290			if (elems.size() > 0 && note.charAt(note.length()-1) == 'i')
291			note = note.substring(0,note.length() -1 );
292
293			return note;
294			}
295
296	torben	349	private String extractTrainNumber(HtmlElement trainTd) {
297			HtmlElement anchorElement = trainTd.getElementsByTagName("a").get(0);
298			String href = anchorElement.getAttribute("href");
299
300	torben	973	int pos = href.lastIndexOf('/');
301			String number = href.substring(pos+1);
302	torben	970
303	torben	349	return number;
304			}
305
306	torben	305	//test
307	torben	580	/*
308	torben	451	public static void main(String args[]) throws Exception {
309	torben	305	DepartureFetcher f = new DepartureFetcher();
310	torben	307	List<DepartureBean> deps = f.lookupDepartures("AR", "FJRN");
311	torben	305	for(DepartureBean d : deps) {
312			System.out.println( d.getTime() + ";" + d.getUpdated() + ";" + d.getTrainNumber() + ";" +
313			d.getDestination() + ";" + d.getOrigin() + ";" + d.getLocation() + ";" + d.getStatus() + ";" + d.getNote() );
314			}
315
316			System.out.println("--------------------------");
317	torben	580	}*/
318	torben	305	}