traininfoservice/banedk/DepartureFetcher.java

package dk.thoerup.traininfoservice.banedk;

import java.util.ArrayList;
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, List<DepartureBean>> cache;
        
        StationDAO stationDao = new StationDAO();
        
        private boolean useTempSite;
        
        public DepartureFetcher(boolean tempSite, int cacheTimeout) {
                useTempSite = tempSite;
                cache = new TimeoutMap<String,List<DepartureBean>>(cacheTimeout);
        }
        
        
        public List<DepartureBean> cachedLookupDepartures(int stationID, boolean arrival) throws Exception {
                final String key = "" + stationID + ":" + arrival;
                
                List<DepartureBean> list = cache.get(key);

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

        public List<DepartureBean> lookupDepartures(int stationID, boolean arrival) throws Exception {
                List<DepartureBean> departureList = new ArrayList<DepartureBean>();
                
                StationBean station = stationDao.getById(stationID);
                
                if (station.getRegional() != null) {
                        List<DepartureBean> list = lookupDepartures(station.getRegional(), TrainType.REGIONAL, arrival);
                        departureList.addAll(list);                     
                }
                
                if (station.getStrain() != null) {
                        List<DepartureBean> list = lookupDepartures(station.getStrain(), TrainType.STOG, arrival);
                        departureList.addAll(list);     
                }               
                
                Collections.sort( departureList );

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