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 {
        
        Logger logger = Logger.getLogger(DepartureFetcher.class.getName());
        
        Map<Integer, List<DepartureBean>> cache;
        
        StationDAO stationDao = new StationDAO();
        
        private boolean useTempSite;
        
        public DepartureFetcher(boolean tempSite, int cacheTimeout) {
                useTempSite = tempSite;
                cache = new TimeoutMap<Integer,List<DepartureBean>>(cacheTimeout);
        }
        
        
        public List<DepartureBean> cachedLookupDepartures(int stationID) throws Exception {

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

        public List<DepartureBean> lookupDepartures(int stationID) throws Exception {
                List<DepartureBean> departureList = new ArrayList<DepartureBean>();
                
                StationBean station = stationDao.getById(stationID);
                
                if (station.getRegional() != null) {
                        List<DepartureBean> list = lookupDepartures(station.getRegional(), "FJRN");
                        departureList.addAll(list);                     
                }
                
                if (station.getStrain() != null) {
                        List<DepartureBean> list = lookupDepartures(station.getStrain(), "S2");
                        departureList.addAll(list);     
                }               
                
                Collections.sort( departureList );

                
                return departureList;
        }
        
        public List<DepartureBean> lookupDepartures(String stationcode, String type) throws Exception {
                if (useTempSite == false) {
                        return lookupDeparturesNormalSite(stationcode, type);
                } else {
                        return lookupDeparturesFromTemporarySite(stationcode, type);
                }
        }
        
        public List<DepartureBean> lookupDeparturesNormalSite(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://www.bane.dk/visStation.asp?ArtikelID=4275&W=" + type + "&S=" + stationcode;
            BanedkInvocation wrapper = new BanedkInvocation(webClient, uri);
            CircuitBreaker breaker = CircuitBreakerManager.getManager().getCircuitBreaker("banedk");
            
            HtmlPage page = (HtmlPage) breaker.invoke(wrapper);
            
            HtmlElement table = page.getElementById("afgangtabel");
            
            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.equalsIgnoreCase("S2")) //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();
                                departure.setStatus(status);
                                
                                String note = extractNote( fields.get(7) );
                                departure.setNote(note);
                                
                                departure.setType(type);
                                
                                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;
            
            BanedkInvocation wrapper = new BanedkInvocation(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("&");
                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			Logger logger = Logger.getLogger(DepartureFetcher.class.getName());
24	torben	387
25	torben	584	Map<Integer, List<DepartureBean>> cache;
26	torben	387
27	torben	588	StationDAO stationDao = new StationDAO();
28
29	torben	580	private boolean useTempSite;
30
31	torben	584	public DepartureFetcher(boolean tempSite, int cacheTimeout) {
32	torben	580	useTempSite = tempSite;
33	torben	584	cache = new TimeoutMap<Integer,List<DepartureBean>>(cacheTimeout);
34	torben	580	}
35
36
37	torben	307
38	torben	387
39	torben	451	public List<DepartureBean> cachedLookupDepartures(int stationID) throws Exception {
40	torben	308
41	torben	387	List<DepartureBean> list = cache.get(stationID);
42
43			if (list == null) {
44			list = lookupDepartures(stationID);
45			cache.put(stationID, list);
46			} else {
47	torben	711	Statistics.getInstance().incrementDepartureCacheHits();
48	torben	389	logger.info("Departure: Cache hit " + stationID); //remove before production
49	torben	387	}
50			return list;
51			}
52
53
54	torben	451	public List<DepartureBean> lookupDepartures(int stationID) throws Exception {
55	torben	307	List<DepartureBean> departureList = new ArrayList<DepartureBean>();
56
57	torben	588	StationBean station = stationDao.getById(stationID);
58	torben	307
59	torben	588	if (station.getRegional() != null) {
60			List<DepartureBean> list = lookupDepartures(station.getRegional(), "FJRN");
61			departureList.addAll(list);
62	torben	307	}
63
64	torben	588	if (station.getStrain() != null) {
65			List<DepartureBean> list = lookupDepartures(station.getStrain(), "S2");
66			departureList.addAll(list);
67			}
68
69			Collections.sort( departureList );
70
71
72	torben	307	return departureList;
73	torben	305	}
74
75	torben	451	public List<DepartureBean> lookupDepartures(String stationcode, String type) throws Exception {
76	torben	580	if (useTempSite == false) {
77			return lookupDeparturesNormalSite(stationcode, type);
78			} else {
79			return lookupDeparturesFromTemporarySite(stationcode, type);
80			}
81			}
82
83			public List<DepartureBean> lookupDeparturesNormalSite(String stationcode, String type) throws Exception {
84	torben	305
85			List<DepartureBean> departureList = new ArrayList<DepartureBean>();
86
87	torben	591	final WebClient webClient = new WebClient( BrowserVersion.FIREFOX_3 );
88	torben	386	webClient.setTimeout(2500);
89	torben	313	webClient.setJavaScriptEnabled(false);
90
91	torben	421	String uri = "http://www.bane.dk/visStation.asp?ArtikelID=4275&W=" + type + "&S=" + stationcode;
92			BanedkInvocation wrapper = new BanedkInvocation(webClient, uri);
93			CircuitBreaker breaker = CircuitBreakerManager.getManager().getCircuitBreaker("banedk");
94	torben	305
95	torben	421	HtmlPage page = (HtmlPage) breaker.invoke(wrapper);
96	torben	305
97			HtmlElement table = page.getElementById("afgangtabel");
98
99	torben	342	if (table != null) {
100			DomNodeList<HtmlElement> tableRows = table.getElementsByTagName("tr");
101
102			for (HtmlElement currentRow : tableRows) {
103			String rowClass = currentRow.getAttribute("class");
104			if (rowClass != null && rowClass.toLowerCase().contains("station") ) {
105			DomNodeList<HtmlElement> fields = currentRow.getElementsByTagName("td");
106
107			DepartureBean departure = new DepartureBean();
108
109			String time = fields.get(0).asText();
110	torben	375	if (time.equals(""))
111			time = "0:00"; //Bane.dk bug work-around
112	torben	342	departure.setTime(time);
113
114			int updated = extractUpdated( fields.get(1) );
115			departure.setUpdated(updated);
116
117			String trainNumber = fields.get(2).asText();
118	torben	410	if (type.equalsIgnoreCase("S2")) //If it is S-train we need to extract the trainNumber
119	torben	349	trainNumber = trainNumber + " " + extractTrainNumber(fields.get(2));
120	torben	342	departure.setTrainNumber(trainNumber);
121
122			String destination = fields.get(3).asText();
123			departure.setDestination(destination);
124
125			String origin = fields.get(4).asText();
126			departure.setOrigin(origin);
127
128			String location = fields.get(5).asText();
129			departure.setLocation(location);
130
131			String status = fields.get(6).asText();
132			departure.setStatus(status);
133
134			String note = extractNote( fields.get(7) );
135			departure.setNote(note);
136
137	torben	697	departure.setType(type);
138
139	torben	342	departureList.add(departure);
140			}
141			}
142	torben	348	} else {
143			logger.warning("No departures found for station=" + stationcode + ", type=" + type);
144	torben	305	}
145	torben	591	webClient.closeAllWindows();
146	torben	348
147	torben	305	return departureList;
148			}
149
150	torben	580	public List<DepartureBean> lookupDeparturesFromTemporarySite(String stationcode, String type) throws Exception {
151
152			List<DepartureBean> departureList = new ArrayList<DepartureBean>();
153
154	torben	591	final WebClient webClient = new WebClient(BrowserVersion.FIREFOX_3);
155	torben	580	webClient.setTimeout(2500);
156			webClient.setJavaScriptEnabled(false);
157
158
159			String uri = "http://bane.dk/lite/station.asp?w=" + type + "&s=" + stationcode;
160
161			BanedkInvocation wrapper = new BanedkInvocation(webClient, uri);
162			CircuitBreaker breaker = CircuitBreakerManager.getManager().getCircuitBreaker("banedk");
163
164			HtmlPage page = (HtmlPage) breaker.invoke(wrapper);
165
166			HtmlElement table = page.getElementById("traf_afgang");
167
168			if (table != null) {
169			DomNodeList<HtmlElement> tableRows = table.getElementsByTagName("tr");
170
171			boolean isFirst = true;
172
173			for (HtmlElement currentRow : tableRows) {
174			if (isFirst == true) { //skip table headers
175			isFirst = false;
176			continue;
177			}
178
179			DomNodeList<HtmlElement> fields = currentRow.getElementsByTagName("td");
180
181			DepartureBean departure = new DepartureBean();
182
183			String time = fields.get(0).asText().trim();
184	torben	583
185	torben	580	if (time.equals(""))
186			time = "0:00"; //Bane.dk bug work-around
187			departure.setTime(time);
188
189
190			String trainNumber = fields.get(1).asText();
191			departure.setTrainNumber(trainNumber);
192
193			String destination = fields.get(2).asText();
194			departure.setDestination(destination);
195
196			String origin = fields.get(3).asText();
197			departure.setOrigin(origin);
198
199			String status = fields.get(4).asText();
200			departure.setStatus(status);
201
202	torben	582	String note = fields.get(5).asText();
203	torben	580	departure.setNote(note);
204
205			departureList.add(departure);
206			}
207			} else {
208			logger.warning("No departures found for station=" + stationcode + ", type=" + type);
209			}
210	torben	591	webClient.closeAllWindows();
211	torben	580
212	torben	591
213	torben	580	return departureList;
214			}
215
216
217	torben	305	private int extractUpdated(HtmlElement updatedTd) { //extract the digit (in this case: 4) from "media/trafikinfo/opdater4.gif"
218			int updated = -1;
219
220			DomNodeList<HtmlElement> updatedImgs = updatedTd.getElementsByTagName("img");
221			String updatedStr = updatedImgs.get(0).getAttribute("src");
222
223			if (updatedStr != null) {
224			for (int i=0; i<updatedStr.length(); i++) {
225			char c = updatedStr.charAt(i);
226			if ( Character.isDigit(c)) {
227			updated = Character.digit(c, 10);
228			break;
229			}
230			}
231			}
232			return updated;
233			}
234
235	torben	313	private String extractNote(HtmlElement noteTd) {
236			String note = noteTd.asText().trim();
237
238			List<HtmlElement> elems = noteTd.getElementsByAttribute("span", "class", "bemtype");
239			if (elems.size() > 0 && note.charAt(note.length()-1) == 'i')
240			note = note.substring(0,note.length() -1 );
241
242			return note;
243			}
244
245	torben	349	private String extractTrainNumber(HtmlElement trainTd) {
246			String number = "";
247			HtmlElement anchorElement = trainTd.getElementsByTagName("a").get(0);
248			String href = anchorElement.getAttribute("href");
249			String argstring = href.substring( href.indexOf('?') + 1);
250
251			String args[] = argstring.split("&");
252			for (String arg : args) {
253			String pair[] = arg.split("="); // Key=pair[0], Value=pair[1]
254
255			if (pair[0].equalsIgnoreCase("TogNr"))
256			number = pair[1];
257			}
258
259
260			return number;
261			}
262
263	torben	305	//test
264	torben	580	/*
265	torben	451	public static void main(String args[]) throws Exception {
266	torben	305	DepartureFetcher f = new DepartureFetcher();
267	torben	307	List<DepartureBean> deps = f.lookupDepartures("AR", "FJRN");
268	torben	305	for(DepartureBean d : deps) {
269			System.out.println( d.getTime() + ";" + d.getUpdated() + ";" + d.getTrainNumber() + ";" +
270			d.getDestination() + ";" + d.getOrigin() + ";" + d.getLocation() + ";" + d.getStatus() + ";" + d.getNote() );
271			}
272
273			System.out.println("--------------------------");
274	torben	580	}*/
275	torben	305	}